Handle calloc failures

Remove dead code
Add socks5 server example
2026-10-26 12:14:56 +00:00 · 2021-01-26 12:16:58 +00:00 · 2021-01-25 14:43:56 +00:00 · 2021-01-25 14:43:08 +00:00 · 2021-01-25 10:37:35 +00:00 · 2021-01-25 10:35:45 +00:00
299 changed files with 21440 additions and 165792 deletions
@@ -0,0 +1,6 @@
 BasedOnStyle: Google
 AllowShortFunctionsOnASingleLine: false
 SpaceAfterCStyleCast: true
 PointerBindsToType: false
 DerivePointerBinding: false
 IncludeBlocks: Preserve
@@ -0,0 +1,40 @@
 name: build
 on: [push, pull_request]
 jobs:
  linux:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: Install packages
      run: sudo apt-get install libmbedtls-dev
    - name: make
      run: make test test++ IPV6=0
    - name: openssl
      run: make test SSL=OPENSSL IPV6=0
    - name: examples
      run: make ex
  macos:
    runs-on: macos-latest
    steps:
    - uses: actions/checkout@v2
    - name: Install packages
      run: HOMEBREW_NO_AUTO_UPDATE=1 brew install jq mbedtls openssl
    - name: make
      run: make test++ upload-coverage IPV6=0
    - name: openssl
      run: make test SSL=OPENSSL IPV6=0
    - name: exports
      run: make mg_prefix
  windows:
    runs-on: ubuntu-latest
    steps:
    - uses: actions/checkout@v2
    - name: vc98
      run: make vc98
    - name: vc2017
      run: make vc2017
    - name: mingw
      run: make mingw
    - name: mingw++
      run: make mingw++
@@ -1,5 +1,5 @@
-Copyright (c) 2004-2013 Sergey Lyubka <valenok@gmail.com>
+Copyright (c) 2004-2013 Sergey Lyubka
-Copyright (c) 2013-2015 Cesanta Software Limited
+Copyright (c) 2013-2020 Cesanta Software Limited
 All rights reserved
 This software is dual-licensed: you can redistribute it and/or modify
@@ -0,0 +1,106 @@
 SRCS = $(wildcard src/*.c)
 HDRS = $(wildcard src/*.h)
 DEFS ?= -DMG_MAX_HTTP_HEADERS=5 -DMG_ENABLE_LINES -DMG_ENABLE_HTTP_DEBUG_ENDPOINT=1 -DMG_ENABLE_DIRECTORY_LISTING=1 -DMG_ENABLE_SSI=1
 CFLAGS ?= -W -Wall -Werror -Isrc -I. -O0 -g $(DEFS) $(TFLAGS) $(EXTRA)
 SSL ?= MBEDTLS
 CDIR ?= $(realpath $(CURDIR))
 VC98 = docker run --rm -e WINEDEBUG=-all -v $(CDIR):$(CDIR) -w $(CDIR) docker.io/mdashnet/vc98
 VC2017 = docker run --rm -e WINEDEBUG=-all -v $(CDIR):$(CDIR) -w $(CDIR) docker.io/mdashnet/vc2017
 MINGW = docker run --rm -v $(CDIR):$(CDIR) -w $(CDIR) docker.io/mdashnet/mingw
 GCC = docker run --rm -v $(CDIR):$(CDIR) -w $(CDIR) mdashnet/cc2
 VCFLAGS = /nologo /W3 /O2 /I. $(DEFS) $(TFLAGS)
 CLANG ?= clang # /usr/local/opt/llvm\@9/bin/clang
 IPV6 ?= 1
 ASAN_OPTIONS ?=
 EXAMPLES := $(wildcard examples/*)
 EXAMPLE_TARGET ?= example
 .PHONY: ex test
 ifeq "$(SSL)" "MBEDTLS"
 MBEDTLS_DIR ?= $(shell brew --cellar mbedtls)
 MBEDTLS_VER ?= $(shell brew info mbedtls --json | jq -j .[0].installed[0].version)
 MBEDTLS ?= $(MBEDTLS_DIR)/$(MBEDTLS_VER)
 CFLAGS += -DMG_ENABLE_MBEDTLS=1 -I$(MBEDTLS)/include -I/usr/include
 LDFLAGS ?= -L$(MBEDTLS)/lib -lmbedtls -lmbedcrypto -lmbedx509
 endif
 ifeq "$(SSL)" "OPENSSL"
 OPENSSL_DIR ?= $(shell brew --cellar openssl)
 OPENSSL_VER ?= $(shell brew info openssl --json | jq -j .[0].installed[0].version)
 OPENSSL ?= $(OPENSSL_DIR)/$(OPENSSL_VER)
 CFLAGS += -DMG_ENABLE_OPENSSL=1 -I$(OPENSSL)/include
 LDFLAGS ?= -L$(OPENSSL)/lib -lssl -lcrypto
 endif
 all: mg_prefix test test++ ex vc98 vc2017 mingw mingw++ linux linux++ infer fuzz
 ex:
 	@for X in $(EXAMPLES); do $(MAKE) -C $$X $(EXAMPLE_TARGET); done
 # Check that all external (exported) symbols have "mg_" prefix
 mg_prefix: mongoose.c mongoose.h
 	$(CLANG) mongoose.c $(CFLAGS) -c -o /tmp/x.o && nm /tmp/x.o | grep ' T' | grep -v 'mg_' ; test $$? = 1
 # C++ build
 test++: CLANG = g++ -Wno-deprecated -Wno-missing-field-initializers
 test++: unamalgamated
 # Make sure we can build from an unamalgamated sources
 unamalgamated: $(SRCS) $(HDRS) Makefile
 	$(CLANG) src/*.c test/unit_test.c $(CFLAGS) $(LDFLAGS) -g -o unit_test
 fuzz: mongoose.c mongoose.h Makefile test/fuzz.c
 	$(CLANG) mongoose.c test/fuzz.c $(CFLAGS) -DMG_ENABLE_LINES -DMG_ENABLE_LOG=0 -fsanitize=fuzzer,signed-integer-overflow,address $(LDFLAGS) -g -o fuzzer
 	$(DEBUGGER) ./fuzzer
 # make CLANG=/usr/local/opt/llvm\@8/bin/clang ASAN_OPTIONS=detect_leaks=1
 test: CFLAGS += -DMG_ENABLE_IPV6=$(IPV6) -fsanitize=address#,undefined
 test: mongoose.c mongoose.h  Makefile test/unit_test.c
 	$(CLANG) mongoose.c test/unit_test.c $(CFLAGS) -coverage $(LDFLAGS) -g -o unit_test
 	ASAN_OPTIONS=$(ASAN_OPTIONS) $(DEBUGGER) ./unit_test
 coverage: test
 	gcov -l -n *.gcno | sed '/^$$/d' | sed 'N;s/\n/ /'
 	gcov mongoose.gcno >/dev/null
 upload-coverage: coverage
 	curl -s https://codecov.io/bash | /bin/bash
 infer:
 	infer run -- cc test/unit_test.c -c -W -Wall -Werror -Isrc -I. -O2 -DMG_ENABLE_MBEDTLS=1 -DMG_ENABLE_LINES -I/usr/local/Cellar/mbedtls/2.23.0/include  -DMG_ENABLE_IPV6=1 -g -o /dev/null
 #vc98: VCFLAGS += -DMG_ENABLE_IPV6=1
 vc98: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(VC98) wine cl mongoose.c test/unit_test.c $(VCFLAGS) ws2_32.lib /Fe$@.exe
 	$(VC98) wine $@.exe
 #vc2017: VCFLAGS += -DMG_ENABLE_IPV6=1
 vc2017: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(VC2017) wine64 cl mongoose.c test/unit_test.c $(VCFLAGS) ws2_32.lib /Fe$@.exe
 	$(VC2017) wine64 $@.exe
 mingw: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(MINGW) i686-w64-mingw32-gcc mongoose.c test/unit_test.c -W -Wall -Werror -I. $(DEFS) -lwsock32 -o test.exe
 	$(VC98) wine test.exe
 mingw++: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(MINGW) i686-w64-mingw32-g++ mongoose.c test/unit_test.c -W -Wall -Werror -I. $(DEFS) -lwsock32 -o test.exe
  # Note: for some reason, a binary built with mingw g++, fails to run
 #linux: CFLAGS += -DMG_ENABLE_IPV6=$(IPV6)
 linux: CFLAGS += -fsanitize=address,undefined
 linux: Makefile mongoose.c mongoose.h test/unit_test.c
 	$(GCC) $(CC) mongoose.c test/unit_test.c $(CFLAGS) $(LDFLAGS) -o unit_test_gcc
 	$(GCC) ./unit_test_gcc
 linux++: CC = g++ -Wno-missing-field-initializers
 linux++: linux
 mongoose.c: $(SRCS) Makefile
 	(cat src/license.h; echo; echo '#include "mongoose.h"' ; (for F in src/private.h src/*.c ; do echo; echo '#ifdef MG_ENABLE_LINES'; echo "#line 1 \"$$F\""; echo '#endif'; cat $$F | sed -e 's,#include ".*,,'; done))> $@
 mongoose.h: $(HDRS) Makefile
 	(cat src/license.h src/version.h ; cat src/arch.h src/arch_*.h src/config.h src/str.h src/log.h src/timer.h src/util.h src/url.h src/iobuf.h src/base64.h src/md5.h src/sha1.h src/event.h src/net.h src/http.h src/ssi.h src/tls.h src/ws.h src/sntp.h src/mqtt.h src/dns.h | sed -e 's,#include ".*,,' -e 's,^#pragma once,,')> $@
 clean: EXAMPLE_TARGET = clean
 clean: ex
 	rm -rf $(PROG) *.o *.dSYM unit_test* ut fuzzer *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb slow-unit* _CL_* infer-out data.txt crash-*
@@ -1,49 +1,56 @@
-# <img src="http://www.cesanta.com/hubfs/www.cesanta.com/Images/mongoose_library.png" width="64" height="64"> Mongoose - Embedded Web Server
+# Mongoose - Embedded Web Server / Embedded Networking Library
-![](https://img.shields.io/badge/license-GPL_2-green.svg "License")
+![License: GPLv2](https://img.shields.io/badge/license-GPL_2-green.svg "License")
 [![Build Status]( https://github.com/cesanta/mongoose/workflows/build/badge.svg)](https://github.com/cesanta/mongoose/actions)
 [![Code Coverage](https://codecov.io/gh/cesanta/mongoose/branch/master/graph/badge.svg)](https://codecov.io/gh/cesanta/mongoose)
 [![Fuzzing Status](https://oss-fuzz-build-logs.storage.googleapis.com/badges/mongoose.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?sort=-opened&can=1&q=proj:mongoose)
-Mongoose is ideal for embedded environments. It has been designed
+Mongoose is a networking library for C/C++. It implements event-driven
-for connecting devices and bringing them online.
+non-blocking APIs for TCP, UDP, HTTP, WebSocket, MQTT.  It has been designed
-[Mongoose](https://www.cesanta.com/products)
+for connecting devices and bringing them online. On the market since 2004, used
-has been on the market since 2004 and attracted
+by vast number of open source and commercial products - it even runs on the
-over 1 million cumulative downloads.
+International Space Station!  Mongoose makes embedded network programming fast,
 robust, and easy.
-It provides easy to use event-driven interface that allows to implement
+- [Download Mongoose Source Code here](https://www.cesanta.com/download.html)
-network protocols or scalable network applications  with little effort.
+- [Read Mongoose documentation](https://cesanta.com/docs/)
 Mongoose helps developers to manage the complexity of network programming
 and let them concentrate on the logic, saving time and money.
- [Download Mongoose Source Code here](http://hubs.ly/H01bWvx0)
+Connectivity is vital for software and embedded devices, but there are many
- [Ask questions on support forum](http://forum.cesanta.com/index.php?p=/categories/mongoose)
+pitfalls to consider when embedding a web server.  This white paper breaks down
- [Read User Guide and API reference](https://docs.cesanta.com/mongoose)
+on the top 9 things to avoid when embedding a web server.
 - [Study mongoose example code](https://github.com/cesanta/mongoose/tree/master/examples) 
-> Nothing overdone. Nothing less. So unbelievably easy to use.
+- [Download “9 Things NOT to do when embedding a web server” white paper here](https://www.cesanta.com/whitepaper.html)
 > Just how good software should be! -- Pritin Tyagaraj, SAP
 Looking for a complete IoT solution? Check out
 - [VCON](https://vcon.io) - Arduino compatible MCU modules with built-in firmware OTA updates
 - [Mongoose OS](https://mongoose-os.com) - open source embedded operating system for low-power connected microcontrollers. Secure, designed for commercial Internet of Things products
 # Support
 - [Study Mongoose examples](https://github.com/cesanta/mongoose/tree/master/examples)
 - [Support Forum - ask your technical questions here](https://forum.cesanta.com/c/mongoose-library/6)
 - [Commercial licensing and support available](https://www.cesanta.com/licensing.html)
 - [Check out latest releases](https://github.com/cesanta/mongoose/releases)
 # Features
 * Cross-platform: works on Linux/UNIX, MacOS, QNX, eCos, Windows, Android,
-  iPhone, FreeRTOS (TI CC3200, ESP8266), etc
+  iPhone, FreeRTOS, etc
-* Single-threaded, asynchronous, non-blocking core with simple event-based API
+* Supported embedded architectures: ESP32, ESP8266, TI CC3200, TI MSP432, NRF52, STM32, PIC32, NXP, and more
-* Native support for [PicoTCP embedded TCP/IP stack](http://www.picotcp.com), 
+* Builtin protocols: plain TCP/UDP, HTTP, MQTT, Websocket
-  [LWIP embedded TCP/IP stack](https://en.wikipedia.org/wiki/LwIP)
+* SSL/TLS support: mbedTLS, OpenSSL or custom via API
-* Builtin protocols:
+* Asynchronous DNS resolver
   - plain TCP, plain UDP, SSL/TLS (over TCP, one-way or two-way)
   - HTTP client, HTTP server
   - Websocket client, Websocket server
   - JSON-RPC client, JSON-RPC server
   - MQTT client, MQTT broker
   - CoAP client, CoAP server
   - DNS client, DNS server, async DNS resolver
 * Tiny static and run-time footprint
 * Source code is both ISO C and ISO C++ compliant
 * Very easy to integrate: just copy
  [mongoose.c](https://raw.githubusercontent.com/cesanta/mongoose/master/mongoose.c) and
  [mongoose.h](https://raw.githubusercontent.com/cesanta/mongoose/master/mongoose.h)
  files to your build tree
-* Extensively tested and production-ready, trusted by many blue chip businesses
+
 # Licensing
 Mongoose is released under Commercial and [GNU GPL v.2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.html) open source licenses.
 Commercial Projects: [Contact us for commercial license.](https://www.cesanta.com/contact.html)
 # Dashboard Example
@@ -51,54 +58,17 @@ Mongoose is often used to implement device dashboards and real-time
 data exchange over Websocket. Here is a dashboard example that illustrates
 the functionality:
-![](http://www.cesanta.com/hubfs/www.cesanta.com/diagrams/dash_mongoose_diagram.png)
+![](http://www.cesanta.com/images/dashboard.png)
-[Developing a new product? Contact us today to discuss how Mongoose can help
+[Developing a new product? Contact us today to discuss how Mongoose can help.](https://www.cesanta.com/contact.html)
 ](https://www.cesanta.com/contact)
 # Contributions
-People who have agreed to the
+Contributions are welcome! Please follow the guidelines below:
 [Cesanta CLA](https://docs.cesanta.com/contributors_la.shtml)
 can make contributions. Note that the CLA isn't a copyright
 _assigment_ but rather a copyright _license_.
 You retain the copyright on your contributions.
-# Licensing
+- Sign [Cesanta CLA](https://cesanta.com/cla.html) and send GitHub pull request
 - When making pull requests, please make sure that it has only one commit,
 and imlements/fixes only one piece of functionality
-You are using Mongoose under
+# Looking for a pre-compiled Mongoose web server Windows or Mac binary?
-[GPLv2](http://www.gnu.org/licenses/old-licenses/gpl-2.0.en.html)
+- [Download pre-compiled Mongoose web server binary.](https://www.cesanta.com/binary.html)
 and until you commercialize your
 application, can continue to use Mongoose free of charge.
 Once you commercialize your product, in order to comply with GPLv2
 you need to either open the source code of your product fully or
 alternatively purchase a commercial license.
 We offer [three levels of commercial licensing](https://www.cesanta.com/products):
 - Mongoose Lite: cross platform integration, SSL/TLS, HTTP support
 - Mongoose: Mongoose Lite + HTTP CGI, HTTP SSI, HTTP Digest Auth,
  WebSocket support
 - Mongoose Premium: Mongoose + Plain TCP, UDP, JSON-RPC, MQTT, DNS,
  CoAP support
 [Enquire about commercial licensing here](https://www.cesanta.com/contact)
 # Mongoose Binary
 This is our easy to use web server for web developers (PHP, Ruby, Python, etc)
 and web designers. Available in three editions to suit your needs: free, pro
 (USD 5) and dev edition (from USD 8). To install, simply download, double-click
 to start and run browser - that's all!
 [Download Mongoose Binary here](https://www.cesanta.com/products#binary)
 # Other products by Cesanta
 - [Smart.js](https://github.com/cesanta/smart.js) -
    Generic, hardware independent, full-stack IoT software platform
 - [V7](https://github.com/cesanta/v7) - Embedded JavaScript engine
 - [Frozen](https://github.com/cesanta/frozen) - JSON parser and generator
 - [SLRE](https://github.com/cesanta/slre) - Super Light Regular Expression
  library
@@ -1 +0,0 @@
 *.exe
@@ -1,118 +0,0 @@
 #############################################################
 # Required variables for each makefile
 # Discard this section from all parent makefiles
 # Expected variables (with automatic defaults):
 #   CSRCS (all "C" files in the dir)
 #   SUBDIRS (all subdirs with a Makefile)
 #   GEN_LIBS - list of libs to be generated ()
 #   GEN_IMAGES - list of object file images to be generated ()
 #   GEN_BINS - list of binaries to be generated ()
 #   COMPONENTS_xxx - a list of libs/objs in the form
 #     subdir/lib to be extracted and rolled up into
 #     a generated lib/image xxx.a ()
 #
 TARGET = eagle
 #FLAVOR = release
 FLAVOR = debug
 EXTRA_CCFLAGS += -Wall -Werror
 ifndef PDIR # {
 GEN_IMAGES= eagle.app.v6.out
 GEN_BINS= eagle.app.v6.bin
 SPECIAL_MKTARGETS=$(APP_MKTARGETS)
 SUBDIRS=user
 endif # } PDIR
 LDDIR = $(SDK_PATH)/ld
 CCFLAGS += -Os
 TARGET_LDFLAGS =		\
 	-nostdlib		\
 	-Wl,-EL \
 	--longcalls \
 	--text-section-literals
 ifeq ($(FLAVOR),debug)
    TARGET_LDFLAGS += -g -O2
 endif
 ifeq ($(FLAVOR),release)
    TARGET_LDFLAGS += -g -O0
 endif
 COMPONENTS_eagle.app.v6 = \
 	user/libuser.a
 LINKFLAGS_eagle.app.v6 = \
 	-L$(SDK_PATH)/lib        \
 	-Wl,--gc-sections   \
 	-nostdlib	\
    -T$(LD_FILE)   \
 	-Wl,--no-check-sections	\
    -u call_user_start	\
 	-Wl,-static						\
 	-Wl,--start-group					\
 	-lcirom \
 	-lgcc					\
 	-lhal					\
 	-lphy	\
 	-lpp	\
 	-lnet80211	\
 	-lwpa	\
 	-lcrypto    \
 	-lmain	\
 	-lfreertos	\
 	-llwip	\
 	$(DEP_LIBS_eagle.app.v6)					\
 	-Wl,--end-group
 DEPENDS_eagle.app.v6 = \
                $(LD_FILE) \
                $(LDDIR)/eagle.rom.addr.v6.ld
 #############################################################
 # Configuration i.e. compile options etc.
 # Target specific stuff (defines etc.) goes in here!
 # Generally values applying to a tree are captured in the
 #   makefile at its root level - these are then overridden
 #   for a subtree within the makefile rooted therein
 #
 #UNIVERSAL_TARGET_DEFINES =		\
 # Other potential configuration flags include:
 #	-DTXRX_TXBUF_DEBUG
 #	-DTXRX_RXBUF_DEBUG
 #	-DWLAN_CONFIG_CCX
 CONFIGURATION_DEFINES =	-DICACHE_FLASH
 DEFINES +=				\
 	$(UNIVERSAL_TARGET_DEFINES)	\
 	$(CONFIGURATION_DEFINES)
 DDEFINES +=				\
 	$(UNIVERSAL_TARGET_DEFINES)	\
 	$(CONFIGURATION_DEFINES)
 #############################################################
 # Recursion Magic - Don't touch this!!
 #
 # Each subtree potentially has an include directory
 #   corresponding to the common APIs applicable to modules
 #   rooted at that subtree. Accordingly, the INCLUDE PATH
 #   of a module can only contain the include directories up
 #   its parent path, and not its siblings
 #
 # Required for each makefile to inherit from the parent
 #
 INCLUDES := $(INCLUDES) -I $(PDIR)include
 sinclude $(SDK_PATH)/Makefile
 .PHONY: FORCE
 FORCE:
@@ -1,36 +0,0 @@
 This is a Mongoose "Hello, world" that can be compiled under ESP8266 RTOS SDK.
 It sets up an AP (SSID `Mongoose`) and serves a "hello world" page on http://192.168.4.1/
 Most of the the boilerplate comes from [project_template](https://github.com/espressif/ESP8266_RTOS_SDK/tree/master/examples/project_template) (@ [3ca6af5](https://github.com/espressif/ESP8266_RTOS_SDK/tree/3ca6af5da68678d809b34c7cd98bee71e0235039/examples/project_template)) with minimal changes.
 To build with no changes to the SDK, you will need a module with 1MB (8Mb) flash or more.
 Compile (for NodeMCU 1.0):
 ```
 $ export SDK_PATH=/path/to/ESP8266_RTOS_SDK
 $ export BIN_PATH=./bin
 $ make clean; make BOOT=new APP=1 SPI_SPEED=40 SPI_MODE=dio SPI_SIZE_MAP=6
 ```
 Flash (using [esptool](https://github.com/themadinventor/esptool)):
 ```
 $ esptool.py --port /dev/ttyUSB0 --baud 230400 \
    write_flash --flash_mode=dio --flash_size=32m \
    0x00000 ${SDK_PATH}/bin/boot_v1.4\(b1\).bin \
    0x01000 ${BIN_PATH}/upgrade/user1.4096.new.6.bin
 ```
 The output can be made to fit in 512KB (4Mb), but stock linker scripts do not reserve enough space for code.
 Custom linker script is provided for that, so you can use it for smaller devices like so (example that will work with ESP-01):
 ```
  $ make clean; make BOOT=none APP=0 SPI_SPEED=40 SPI_MODE=qio SPI_SIZE_MAP=0 LD_FILE=ld/eagle.app.v6.512.compact.ld
  $ esptool.py --port /dev/ttyUSB0 --baud 230400 \
      write_flash --flash_mode=qio --flash_size=4m \
      0x00000 ${BIN_PATH}/eagle.flash.bin \
      0x10000 ${BIN_PATH}/eagle.irom0text.bin
 ```
@@ -1,173 +0,0 @@
 #!/bin/bash
 :<<!
 ******NOTICE******
 MUST set SDK_PATH & BIN_PATH firstly!!!
 example:
 export SDK_PATH=~/ESP8266_RTOS_SDK
 export BIN_PATH=~/esp8266_bin
 !
 echo "gen_misc.sh version 20150911"
 echo ""
 if [ $SDK_PATH ]; then
    echo "SDK_PATH:"
    echo "$SDK_PATH"
    echo ""
 else
    echo "ERROR: Please export SDK_PATH in gen_misc.sh firstly, exit!!!"
    exit
 fi
 if [ $BIN_PATH ]; then
    echo "BIN_PATH:"
    echo "$BIN_PATH"
    echo ""
 else
    echo "ERROR: Please export BIN_PATH in gen_misc.sh firstly, exit!!!"
    exit
 fi
 echo "Please check SDK_PATH & BIN_PATH, enter (Y/y) to continue:"
 read input
 if [[ $input != Y ]] && [[ $input != y ]]; then
    exit
 fi
 echo ""
 echo "Please follow below steps(1-5) to generate specific bin(s):"
 echo "STEP 1: use boot_v1.2+ by default"
 boot=new
 echo "boot mode: $boot"
 echo ""
 echo "STEP 2: choose bin generate(0=eagle.flash.bin+eagle.irom0text.bin, 1=user1.bin, 2=user2.bin)"
 echo "enter (0/1/2, default 0):"
 read input
 if [ -z "$input" ]; then
    if [ $boot != none ]; then
    	boot=none
 	echo "ignore boot"
    fi
    app=0
    echo "generate bin: eagle.flash.bin+eagle.irom0text.bin"
 elif [ $input == 1 ]; then
    if [ $boot == none ]; then
    	app=0
 	echo "choose no boot before"
 	echo "generate bin: eagle.flash.bin+eagle.irom0text.bin"
    else
 	app=1
        echo "generate bin: user1.bin"
    fi
 elif [ $input == 2 ]; then
    if [ $boot == none ]; then
    	app=0
 	echo "choose no boot before"
 	echo "generate bin: eagle.flash.bin+eagle.irom0text.bin"
    else
    	app=2
    	echo "generate bin: user2.bin"
    fi
 else
    if [ $boot != none ]; then
    	boot=none
 	echo "ignore boot"
    fi
    app=0
    echo "generate bin: eagle.flash.bin+eagle.irom0text.bin"
 fi
 echo ""
 echo "STEP 3: choose spi speed(0=20MHz, 1=26.7MHz, 2=40MHz, 3=80MHz)"
 echo "enter (0/1/2/3, default 2):"
 read input
 if [ -z "$input" ]; then
    spi_speed=40
 elif [ $input == 0 ]; then
    spi_speed=20
 elif [ $input == 1 ]; then
    spi_speed=26.7
 elif [ $input == 3 ]; then
    spi_speed=80
 else
    spi_speed=40
 fi
 echo "spi speed: $spi_speed MHz"
 echo ""
 echo "STEP 4: choose spi mode(0=QIO, 1=QOUT, 2=DIO, 3=DOUT)"
 echo "enter (0/1/2/3, default 0):"
 read input
 if [ -z "$input" ]; then
    spi_mode=QIO
 elif [ $input == 1 ]; then
    spi_mode=QOUT
 elif [ $input == 2 ]; then
    spi_mode=DIO
 elif [ $input == 3 ]; then
    spi_mode=DOUT
 else
    spi_mode=QIO
 fi
 echo "spi mode: $spi_mode"
 echo ""
 echo "STEP 5: choose spi size and map"
 echo "    0= 512KB( 256KB+ 256KB)"
 echo "    2=1024KB( 512KB+ 512KB)"
 echo "    3=2048KB( 512KB+ 512KB)"
 echo "    4=4096KB( 512KB+ 512KB)"
 echo "    5=2048KB(1024KB+1024KB)"
 echo "    6=4096KB(1024KB+1024KB)"
 echo "enter (0/2/3/4/5/6, default 0):"
 read input
 if [ -z "$input" ]; then
    spi_size_map=0
    echo "spi size: 512KB"
    echo "spi ota map:  256KB + 256KB"
 elif [ $input == 2 ]; then
    spi_size_map=2
    echo "spi size: 1024KB"
    echo "spi ota map:  512KB + 512KB"
 elif [ $input == 3 ]; then
    spi_size_map=3
    echo "spi size: 2048KB"
    echo "spi ota map:  512KB + 512KB"
 elif [ $input == 4 ]; then
    spi_size_map=4
    echo "spi size: 4096KB"
    echo "spi ota map:  512KB + 512KB"
 elif [ $input == 5 ]; then
    spi_size_map=5
    echo "spi size: 2048KB"
    echo "spi ota map:  1024KB + 1024KB"
 elif [ $input == 6 ]; then
    spi_size_map=6
    echo "spi size: 4096KB"
    echo "spi ota map:  1024KB + 1024KB"
 else
    spi_size_map=0
    echo "spi size: 512KB"
    echo "spi ota map:  256KB + 256KB"
 fi
 echo ""
 echo "start..."
 echo ""
 make clean
 make BOOT=$boot APP=$app SPI_SPEED=$spi_speed SPI_MODE=$spi_mode SPI_SIZE_MAP=$spi_size_map
@@ -1,20 +0,0 @@
 /* eagle.flash.bin     @ 0x00000 */
 /* eagle.irom0text.bin @ 0x10000 */
 /*
 * Flash map for 512KB flash.
 *
 * There is 0x8000 (32KB) available between 0x8000 and 0x10000.
 *
 * Note: IROM images starts at 0x10000 (ignore Makefile output which says 0x40000.
 */
 MEMORY
 {
  dport0_0_seg :                      	org = 0x3FF00000, len = 0x10
  dram0_0_seg :                       	org = 0x3FFE8000, len = 0x18000
  iram1_0_seg :                       	org = 0x40100000, len = 0x8000
  irom0_0_seg :                       	org = 0x40210000, len = 0x6C000
 }
 INCLUDE "../ld/eagle.app.v6.common.ld"
@@ -1,56 +0,0 @@
 This is a simple project template.
 sample_lib is an example for multi-level folder Makefile, notice the folder structure and each Makefile, you can get the clue.
 HOWTO:
 1. Copy this folder to anywhere.
 Example:
   Copy to ~/workspace/project_template
   You can rename this folder as you like.
 2. Export SDK_PATH and BIN_PATH.
 Example:
   Your SDK path is ~/esp_iot_rtos_sdk, and want generate bin at ~/esp8266_bin.
   Do follow steps:
     1>. export SDK_PATH=~/esp_iot_rtos_sdk
     2>. export BIN_PATH=~/esp8266_bin
   SDK and project are seperate, you can update SDK without change your project.
 3. Enter project_template folder, run ./gen_misc.sh, and follow the tips and steps.
 Compile Options:
 (1) COMPILE
    Possible value: xcc
    Default value:
    If not set, use gcc by default.
 (2) BOOT
    Possible value: none/old/new
      none: no need boot
      old: use boot_v1.1
      new: use boot_v1.2
    Default value: new
 (3) APP
    Possible value: 0/1/2
      0: original mode, generate eagle.app.v6.flash.bin and eagle.app.v6.irom0text.bin
      1: generate user1
      2: generate user2
    Default value: 0
 (3) SPI_SPEED
    Possible value: 20/26.7/40/80
    Default value: 40
 (4) SPI_MODE
    Possible value: QIO/QOUT/DIO/DOUT
    Default value: QIO
 (4) SPI_SIZE_MAP
    Possible value: 0/2/3/4/5/6
    Default value: 0
 For example:
    make COMPILE=gcc BOOT=new APP=1 SPI_SPEED=40 SPI_MODE=QIO SPI_SIZE_MAP=0
@@ -1,47 +0,0 @@
 #############################################################
 # Required variables for each makefile
 # Discard this section from all parent makefiles
 # Expected variables (with automatic defaults):
 #   CSRCS (all "C" files in the dir)
 #   SUBDIRS (all subdirs with a Makefile)
 #   GEN_LIBS - list of libs to be generated ()
 #   GEN_IMAGES - list of images to be generated ()
 #   COMPONENTS_xxx - a list of libs/objs in the form
 #     subdir/lib to be extracted and rolled up into
 #     a generated lib/image xxx.a ()
 #
 ifndef PDIR
 GEN_LIBS = libuser.a
 endif
 #############################################################
 # Configuration i.e. compile options etc.
 # Target specific stuff (defines etc.) goes in here!
 # Generally values applying to a tree are captured in the
 #   makefile at its root level - these are then overridden
 #   for a subtree within the makefile rooted therein
 #
 DEFINES += -DMG_DISABLE_DAV -DMG_DISABLE_SYNC_RESOLVER -DMG_DISABLE_CGI \
           -DMG_DISABLE_SOCKETPAIR -DMG_DISABLE_DIRECTORY_LISTING \
           -DMG_MAX_HTTP_HEADERS=20 -DMG_MAX_HTTP_REQUEST_SIZE=1024 \
           -DMG_MAX_PATH=40 -DMG_MAX_HTTP_SEND_IOBUF=1024 \
           -DMG_ESP8266 -DRTOS_SDK -DMG_LWIP
 #############################################################
 # Recursion Magic - Don't touch this!!
 #
 # Each subtree potentially has an include directory
 #   corresponding to the common APIs applicable to modules
 #   rooted at that subtree. Accordingly, the INCLUDE PATH
 #   of a module can only contain the include directories up
 #   its parent path, and not its siblings
 #
 # Required for each makefile to inherit from the parent
 #
 INCLUDES += -I ./
 PDIR := ../$(PDIR)
 sinclude $(PDIR)Makefile
@@ -1,54 +0,0 @@
 /*
 * Copyright (c) 2015 Cesanta Software Limited
 * All rights reserved
 */
 #include <ctype.h>
 #include <sys/time.h>
 #include <stdint.h>
 #include <math.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 #include "esp_common.h"
 /* Makes fprintf(stdout) and stderr work. */
 _ssize_t _write_r(struct _reent *r, int fd, void *buf, size_t len) {
  if (fd == 1 || fd == 2) {
    size_t i;
    for (i = 0; i < len; i++) {
      os_putc(((char *) buf)[i]);
    }
    return len;
  }
  return -1;
 }
 /*
 * You'll need to implement _open_r and friends if you want file operations. See
 * https://github.com/cesanta/smart.js/blob/master/platforms/esp8266/user/esp_fs.c
 * for SPIFFS-based implementation.
 */
 void abort(void) __attribute__((no_instrument_function));
 void abort(void) {
  /* cause an unaligned access exception, that will drop you into gdb */
  *(int *) 1 = 1;
  while (1)
    ; /* avoid gcc warning because stdlib abort() has noreturn attribute */
 }
 void _exit(int status) {
  printf("_exit(%d)\n", status);
  abort();
 }
 int _gettimeofday_r(struct _reent *r, struct timeval *tp, void *tzp) {
  uint32_t time = system_get_time();
  tp->tv_sec = time / 1000000;
  tp->tv_usec = time % 1000000;
  return 0;
 }
@@ -1 +0,0 @@
 ../../../mongoose.c
@@ -1 +0,0 @@
 ../../../mongoose.h
@@ -1,108 +0,0 @@
 /*
 * Copyright (c) 2015 Cesanta Software Limited
 * All rights reserved
 */
 #include "esp_common.h"
 #include "mongoose.h"
 #define AP_SSID "Mongoose"
 #define AP_PASS "Mongoose"
 #define AP_CHAN 9
 #define MG_LISTEN_ADDR "80"
 #define MG_TASK_STACK_SIZE 2048
 #define MG_TASK_PRIORITY 1
 void uart_div_modify(int uart_no, unsigned int freq);
 void ev_handler(struct mg_connection *nc, int ev, void *p) {
  static const char *reply_fmt =
      "HTTP/1.0 200 OK\r\n"
      "Connection: close\r\n"
      "Content-Type: text/plain\r\n"
      "\r\n"
      "Hello %s\n";
  LOG(LL_DEBUG, ("conn %p ev %d", nc, ev));
  switch (ev) {
    case MG_EV_ACCEPT: {
      char addr[32];
      mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr),
                          MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
      LOG(LL_INFO, ("Connection %p from %s", nc, addr));
      break;
    }
    case MG_EV_HTTP_REQUEST: {
      char addr[32];
      struct http_message *hm = (struct http_message *) p;
      mg_sock_addr_to_str(&nc->sa, addr, sizeof(addr),
                          MG_SOCK_STRINGIFY_IP | MG_SOCK_STRINGIFY_PORT);
      LOG(LL_INFO,
          ("HTTP request from %s: %.*s %.*s", addr, (int) hm->method.len,
           hm->method.p, (int) hm->uri.len, hm->uri.p));
      mg_printf(nc, reply_fmt, addr);
      nc->flags |= MG_F_SEND_AND_CLOSE;
      break;
    }
    case MG_EV_CLOSE: {
      LOG(LL_INFO, ("Connection %p closed", nc));
      break;
    }
  }
 }
 void setup_ap() {
  struct softap_config cfg;
  wifi_set_opmode_current(SOFTAP_MODE);
  memset(&cfg, 0, sizeof(cfg));
  strcpy((char *) cfg.ssid, AP_SSID);
  strcpy((char *) cfg.password, AP_PASS);
  cfg.ssid_len = strlen((const char *) cfg.ssid);
  cfg.authmode =
      strlen((const char *) cfg.password) ? AUTH_WPA2_PSK : AUTH_OPEN;
  cfg.channel = AP_CHAN;
  cfg.ssid_hidden = 0;
  cfg.max_connection = 10;
  cfg.beacon_interval = 100; /* ms */
  LOG(LL_INFO, ("Setting up AP '%s' on channel %d", cfg.ssid, cfg.channel));
  wifi_softap_set_config_current(&cfg);
 }
 static void mg_task(void *arg) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  cs_log_set_level(LL_INFO);
  LOG(LL_INFO, ("SDK version: %s", system_get_sdk_version()));
  setup_ap();
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, MG_LISTEN_ADDR, ev_handler);
  if (nc == NULL) {
    LOG(LL_ERROR, ("Error setting up listener!"));
    return;
  }
  mg_set_protocol_http_websocket(nc);
  while (1) {
    mg_mgr_poll(&mgr, 1000);
  }
 }
 xTaskHandle s_mg_task_handle;
 void user_init(void) {
  uart_div_modify(0, UART_CLK_FREQ / 115200);
  setvbuf(stdout, NULL, _IONBF, 0);
  setvbuf(stderr, NULL, _IONBF, 0);
  xTaskCreate(mg_task, (const signed char *) "mongoose", MG_TASK_STACK_SIZE,
              NULL, MG_TASK_PRIORITY, &s_mg_task_handle);
 }
@@ -1,15 +0,0 @@
 # Copyright (c) 2014 Cesanta Software
 # All rights reserved
 SUBDIRS = $(sort $(dir $(wildcard */)))
 X = $(SUBDIRS)
 .PHONY: $(SUBDIRS)
 all: $(SUBDIRS)
 $(SUBDIRS):
 	@$(MAKE) -C $@
 clean:
 	for d in $(SUBDIRS) ; do $(MAKE) -C $$d clean ; done
@@ -1,25 +0,0 @@
 PROG = api_server
 SOURCES = $(PROG).c sqlite3.c db_plugin_sqlite.c ../../mongoose.c
 CFLAGS = -W -Wall -pthread $(CFLAGS_EXTRA)
 ifeq ($(OS), Windows_NT)
 else
  UNAME_S := $(shell uname -s)
  ifeq ($(UNAME_S), Linux)
    CFLAGS += -ldl -lm
  endif
 endif
 all: $(PROG)
 $(PROG): $(SOURCES)
 	$(CC) $(SOURCES) -o $@ $(CFLAGS)
 $(PROG).exe: $(SOURCES)
 	cl $(SOURCES) /I.. /MD /Fe$@
 test: $(PROG)
 	sh unit_test.sh $$(pwd)/$(PROG)
 clean:
 	rm -rf *.gc* *.dSYM *.exe *.obj *.o a.out $(PROG)
@@ -1,104 +0,0 @@
 /*
 * Copyright (c) 2014 Cesanta Software Limited
 * All rights reserved
 */
 #include "db_plugin.h"
 static const char *s_http_port = "8000";
 static struct mg_serve_http_opts s_http_server_opts;
 static int s_sig_num = 0;
 static void *s_db_handle = NULL;
 static const char *s_db_path = "api_server.db";
 static const struct mg_str s_get_method = MG_STR("GET");
 static const struct mg_str s_put_method = MG_STR("PUT");
 static const struct mg_str s_delele_method = MG_STR("DELETE");
 static void signal_handler(int sig_num) {
  signal(sig_num, signal_handler);
  s_sig_num = sig_num;
 }
 static int has_prefix(const struct mg_str *uri, const struct mg_str *prefix) {
  return uri->len > prefix->len && memcmp(uri->p, prefix->p, prefix->len) == 0;
 }
 static int is_equal(const struct mg_str *s1, const struct mg_str *s2) {
  return s1->len == s2->len && memcmp(s1->p, s2->p, s2->len) == 0;
 }
 static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  static const struct mg_str api_prefix = MG_STR("/api/v1");
  struct http_message *hm = (struct http_message *) ev_data;
  struct mg_str key;
  switch (ev) {
    case MG_EV_HTTP_REQUEST:
      if (has_prefix(&hm->uri, &api_prefix)) {
        key.p = hm->uri.p + api_prefix.len;
        key.len = hm->uri.len - api_prefix.len;
        if (is_equal(&hm->method, &s_get_method)) {
          db_op(nc, hm, &key, s_db_handle, API_OP_GET);
        } else if (is_equal(&hm->method, &s_put_method)) {
          db_op(nc, hm, &key, s_db_handle, API_OP_SET);
        } else if (is_equal(&hm->method, &s_delele_method)) {
          db_op(nc, hm, &key, s_db_handle, API_OP_DEL);
        } else {
          mg_printf(nc, "%s",
                    "HTTP/1.0 501 Not Implemented\r\n"
                    "Content-Length: 0\r\n\r\n");
        }
      } else {
        mg_serve_http(nc, hm, s_http_server_opts); /* Serve static content */
      }
      break;
    default:
      break;
  }
 }
 int main(int argc, char *argv[]) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  int i;
  /* Open listening socket */
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  mg_set_protocol_http_websocket(nc);
  s_http_server_opts.document_root = "web_root";
  /* Parse command line arguments */
  for (i = 1; i < argc; i++) {
    if (strcmp(argv[i], "-D") == 0) {
      mgr.hexdump_file = argv[++i];
    } else if (strcmp(argv[i], "-f") == 0) {
      s_db_path = argv[++i];
    } else if (strcmp(argv[i], "-r") == 0) {
      s_http_server_opts.document_root = argv[++i];
    }
  }
  signal(SIGINT, signal_handler);
  signal(SIGTERM, signal_handler);
  /* Open database */
  if ((s_db_handle = db_open(s_db_path)) == NULL) {
    fprintf(stderr, "Cannot open DB [%s]\n", s_db_path);
    exit(EXIT_FAILURE);
  }
  /* Run event loop until signal is received */
  printf("Starting RESTful server on port %s\n", s_http_port);
  while (s_sig_num == 0) {
    mg_mgr_poll(&mgr, 1000);
  }
  /* Cleanup */
  mg_mgr_free(&mgr);
  db_close(&s_db_handle);
  printf("Exiting on signal %d\n", s_sig_num);
  return 0;
 }
@@ -1,19 +0,0 @@
 /*
 * Copyright (c) 2014 Cesanta Software Limited
 * All rights reserved
 */
 #ifndef DB_PLUGIN_HEADER_DEFINED
 #define DB_PLUGIN_HEADER_DEFINED
 #include "../../mongoose.h"
 void *db_open(const char *db_path);
 void db_close(void **db_handle);
 enum { API_OP_GET, API_OP_SET, API_OP_DEL };
 void db_op(struct mg_connection *nc, const struct http_message *hm,
           const struct mg_str *key, void *db, int op);
 #endif /* DB_PLUGIN_HEADER_DEFINED */
@@ -1,107 +0,0 @@
 /*
 * Copyright (c) 2014 Cesanta Software Limited
 * All rights reserved
 */
 #include "db_plugin.h"
 #include "sqlite3.h"
 void *db_open(const char *db_path) {
  sqlite3 *db = NULL;
  if (sqlite3_open_v2(db_path, &db, SQLITE_OPEN_READWRITE |
      SQLITE_OPEN_CREATE | SQLITE_OPEN_FULLMUTEX, NULL) == SQLITE_OK) {
    sqlite3_exec(db, "CREATE TABLE IF NOT EXISTS kv(key PRIMARY KEY, val);",
                 0, 0, 0);
  }
  return db;
 }
 void db_close(void **db_handle) {
  if (db_handle != NULL && *db_handle != NULL) {
    sqlite3_close(*db_handle);
    *db_handle = NULL;
  }
 }
 static void op_set(struct mg_connection *nc, const struct http_message *hm,
                   const struct mg_str *key, void *db) {
  sqlite3_stmt *stmt = NULL;
  char value[200];
  const struct mg_str *body = hm->query_string.len > 0 ?
    &hm->query_string : &hm->body;
  mg_get_http_var(body, "value", value, sizeof(value));
  if (sqlite3_prepare_v2(db, "INSERT OR REPLACE INTO kv VALUES (?, ?);",
      -1, &stmt, NULL) == SQLITE_OK) {
    sqlite3_bind_text(stmt, 1, key->p, key->len, SQLITE_STATIC);
    sqlite3_bind_text(stmt, 2, value, strlen(value), SQLITE_STATIC);
    sqlite3_step(stmt);
    sqlite3_finalize(stmt);
  }
  mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
 }
 static void op_get(struct mg_connection *nc, const struct http_message *hm,
                   const struct mg_str *key, void *db) {
  sqlite3_stmt *stmt = NULL;
  const char *data = NULL;
  int result;
  (void) hm;
  if (sqlite3_prepare_v2(db, "SELECT val FROM kv WHERE key = ?;",
      -1, &stmt, NULL) == SQLITE_OK) {
    sqlite3_bind_text(stmt, 1, key->p, key->len, SQLITE_STATIC);
    result = sqlite3_step(stmt);
    data = (char *) sqlite3_column_text(stmt, 0);
    if ((result == SQLITE_OK || result == SQLITE_ROW) && data != NULL) {
      mg_printf(nc, "HTTP/1.1 200 OK\r\n"
                "Content-Type: text/plain\r\n"
                "Content-Length: %d\r\n\r\n%s",
                (int) strlen(data), data);
    } else {
      mg_printf(nc, "%s", "HTTP/1.1 404 Not Found\r\n"
                "Content-Length: 0\r\n\r\n");
    }
    sqlite3_finalize(stmt);
  } else {
    mg_printf(nc, "%s", "HTTP/1.1 500 Server Error\r\n"
              "Content-Length: 0\r\n\r\n");
  }
 }
 static void op_del(struct mg_connection *nc, const struct http_message *hm,
                   const struct mg_str *key, void *db) {
  sqlite3_stmt *stmt = NULL;
  int result;
  (void) hm;
  if (sqlite3_prepare_v2(db, "DELETE FROM kv WHERE key = ?;",
      -1, &stmt, NULL) == SQLITE_OK) {
    sqlite3_bind_text(stmt, 1, key->p, key->len, SQLITE_STATIC);
    result = sqlite3_step(stmt);
    if (result == SQLITE_OK || result == SQLITE_ROW) {
      mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
    } else {
      mg_printf(nc, "%s", "HTTP/1.1 404 Not Found\r\n"
                "Content-Length: 0\r\n\r\n");
    }
    sqlite3_finalize(stmt);
  } else {
    mg_printf(nc, "%s", "HTTP/1.1 500 Server Error\r\n"
              "Content-Length: 0\r\n\r\n");
  }
 }
 void db_op(struct mg_connection *nc, const struct http_message *hm,
           const struct mg_str *key, void *db, int op) {
  switch (op) {
    case API_OP_GET: op_get(nc, hm, key, db); break;
    case API_OP_SET: op_set(nc, hm, key, db); break;
    case API_OP_DEL: op_del(nc, hm, key, db); break;
    default:
      mg_printf(nc, "%s", "HTTP/1.0 501 Not Implemented\r\n"
                "Content-Length: 0\r\n\r\n");
      break;
  }
 }
@@ -1,35 +0,0 @@
 #!/bin/sh
 PROG=$1
 PORT=${2:-8000}  # If second param is given, this is load balancer port
 DB_FILE=/tmp/_$$.db
 URL=http://127.0.0.1:$PORT/api/v1
 cleanup() {
  rm -rf $DB_FILE
  kill -9 $PID >/dev/null 2>&1
 }
 #set -x
 trap cleanup EXIT
 cleanup
 $PROG -f $DB_FILE &
 PID=$!
 #sleep 1
 curl -s -X PUT -d 'value=123' $URL/foo
 curl -s -X PUT -d 'value=success' $URL/bar/baz
 # Fetch existing key
 RESULT=$(curl -s $URL/bar/baz)
 test "$RESULT" = "success" || exit 1
 # Delete it
 curl -s -X DELETE $URL/bar/baz
 # Make sure it's deleted - GET must result in 404
 RESULT=$(curl -s -i $URL/bar/baz | head -1 | tr -d '\r')
 test "$RESULT" = "HTTP/1.1 404 Not Found" || exit 1
 exit 0
@@ -1,38 +0,0 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="utf-8" />
  <title>RESTful API demo</title>
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <style type="text/css">
    * { outline: none; }
    body {
      background-color: #789; margin: 0;
      padding: 0; font: 16px/1.4 Helvetica, Arial, sans-serif;
      font: 16px/1.4 Helvetica, Arial, sans-serif;
    }
    div.content {
      width: 800px; margin: 2em auto; padding: 20px 50px;
      background-color: #fff; border-radius: 1em;
    }
    label { display: inline-block; min-width: 7em; }
    input { border: 1px solid #ccc; padding: 0.2em; }
    a:link, a:visited { color: #69c; text-decoration: none; }
    @media (max-width: 700px) {
      body { background-color: #fff; }
      div.content { width: auto; margin: 0 auto; padding: 1em; }
    }
 </style>
 <script src="http://code.jquery.com/jquery-1.11.0.min.js"></script>
 <script language="javascript" type="text/javascript">
  jQuery(function() {
  });
 </script>
 </head>
 <body>
  <div class="content">
    <h1>API server</h1>
  </div>
 </body>
 </html>
@@ -1,2 +0,0 @@
 # This "makefile" is only intended to prevent errors during main makefile execution
 all:
@@ -1,46 +0,0 @@
 # Arduino Restful Client
 This example demonstrates how to use [Mongoose](https://www.cesanta.com/mongoose) to send HTTP commands from Arduino.
 Example sends free memory size and current board uptime, but it can be modified to send any user-specific data.
 At the moment this example supports [Arduino Mega 2560](http://arduino.cc/en/Main/ArduinoBoardMega2560) board (and compatible) with either W5100-based
 network shield (like [Arduino Ethernet Shield](http://arduino.cc/en/Main/ArduinoEthernetShield)) or [CC3000](http://www.ti.com/product/cc3000)-based WIFI Shield.
 ## Build and run instructions:
 ###To run with Arduino Ethernet (W5100) shield:
 1. Add (Sketch->Add file...) the following files to sketch:
     - /mongoose/mongoose.h
     - /mongoose/mongoose.c
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 3. Buils and start (in console) /Users/alex/Projects/mongoose/examples/restful_server example
 4. Make `board_ip` and `board_mac` variables suitable for your network and board
 5. Change IP address in `s_target_address` variable to IP address of host running restful_server
 6. Uncomment line `#include <Ethernet.h>`
 7. Compile and flash sketch
 8. restful_server will start to show current uptime and free memory size (with 5 seconds interval)
 ###To run with Adafruit WiFi (CC3000) shield:
 1. Add (Sketch->Add files...) the following files to sketch:
     - /mongoose/mongoose.h
     - /mongoose/mongoose.c
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 2. Import Adafruit CC3000 library for mongoose
    (select Sketch->Import Library...->Add library... and point
     /mongoose/platforms/arduino_wifi_CC3000/adafruit_CC3000_lib_mongoose folder)
 3. Buils and start (in console) /Users/alex/Projects/mongoose/examples/restful_server example
 4. Make the following variables suitable for your network
     - `board_ip`
     - `subnet_mask`
     - `gateway`
     - `dns`
     - `wlan_ssid`
     - `wlan_pwd`
     - `wlan_security`
 5. Change IP address in `s_target_address` variable to IP address of host running restful_server
 6. Uncomment line `#include <Adafruit_CC3000.h>`
 8. Compile and flash sketch
 9. restful_server will start to show current uptime and free memory size (with 5 seconds interval)
@@ -1,141 +0,0 @@
 /*
 * Copyright (c) 2015 Cesanta Software Limited
 * All rights reserved
 * 
 * Build and run instructions:
 * To run with Arduino Ethernet (W5100) shield:
 * -----------------------------------------------------------
 *  1. Add (Sketch->Add file...) the following files to sketch:
 *     - /mongoose/mongoose.h
 *     - /mongoose/mongoose.c
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 *  2. Buils and run in console /Users/alex/Projects/mongoose/examples/restful_server example
 *  3. Make board_ip and board_mac variables suitable for your network and board
 *  4. Uncomment line #include <Ethernet.h>
 *  5. Change IP address in s_target_address variable to IP address of host running restful_server
 *  6. Compile & flash sketch
 *  7. restful_server server will start to show current uptime and free memory size (with 5 second interval) 
 *
 * To run with Adafruit WiFi (CC3000) shield:
 * -----------------------------------------------------------
 *  1. Add (Sketch->Add files...) the following files to sketch:
 *     - /mongoose/mongoose.h
 *     - /mongoose/mongoose.c
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 *  2. Import Adafruit CC3000 library for mongoose (select Sketch->Import Library...->Add library... and point 
 *     /mongoose/platforms/arduino_wifi_CC3000/adafruit_CC3000_lib_mongoose folder
 *  3. Buils and run in console /Users/alex/Projects/mongoose/examples/restful_server example
 *  4. Make the following variables suitable for your network
 *     - board_ip
 *     - subnet_mask
 *     - gateway
 *     - dns 
 *     - wlan_ssid
 *     - wlan_pwd
 *     - wlan_security
 *  5. Uncomment line #include <Adafruit_CC3000.h>
 *  6. Compile & flash sketch
 *  7. restful_server server will start to show current uptime and free memory size (with 5 second interval) *
 *
 */
 //#include <Ethernet.h>
 //#include <Adafruit_CC3000.h>
 #include <SPI.h>
 #include "mongoose.h"
 // CHANGE THESE VARIABLES
 // NB: Devices with the same address must not end up on the same network.
 // Use MAC address provided by device manufacturer (e.g. on a sticker).
 // If there isn't one, use a random one from the locally administered range.
 // See http://en.wikipedia.org/wiki/MAC_address for details.
 static uint8_t board_mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
 };
 static uint8_t board_ip[] = {192, 168, 10, 177};
 #ifdef WIFI_CC3000
 static uint8_t subnet_mask[] = {255, 255, 255, 0};
 static uint8_t gateway[] = {192, 168, 10, 254};
 static uint8_t dns_ip[] = {192, 168, 10, 254};
 static const char *wlan_ssid = "mynetwork";     
 static const char *wlan_pwd = "mypassword";
 static int wlan_security = WLAN_SEC_WPA2;
 #endif
 static const char *s_target_address = "192.168.10.3:8000";
 /////////////////////////////////////////////
 static const char *s_request = "/printcontent";
 static uint32_t IP2U32(uint8_t* iparr) {
  return ((uint32_t)iparr[0] << 24) | ((uint32_t)iparr[1] << 16) | (iparr[2] << 8) | (iparr[3]);
 }
 static int get_data_to_send(char* buf, int buf_size) {
  // Adding data to send
  // It could be any sensor data, now just put uptime & free memory size here
  return snprintf(buf, buf_size, "Uptime: %lus Free memory: %db",
                  millis()/1000, get_freememsize());
 }
 static void rfc_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  int connect_status;
  switch (ev) {
    case NS_CONNECT:
      connect_status = * (int *) ev_data;
      if (connect_status == 0) {
        char buf[100];
        int len = get_data_to_send(buf, sizeof(buf));
        mg_printf(nc, "POST %s HTTP/1.0\r\nHost: %s\r\nContent-Lenght: %d"
                  "\r\n\r\n%s", s_request, s_target_address, len, buf);
        nc->flags |= MG_F_SEND_AND_CLOSE;
      } else {
        nc->flags |= MG_F_CLOSE_IMMEDIATELY;
      }
      break;
    default:
      break;
  }
 }
 static struct mg_mgr mgr;
 static struct mg_connection *nc;
 void setup()
 {
  Serial.begin(9600);
  Serial.println("Initialization...");
 #if defined(ETHERNET_W5100)
  avr_netinit(board_mac, board_ip);
 #elif defined(WIFI_CC3000)
  if (avr_netinit(wlan_ssid, wlan_pwd, wlan_security, IP2U32(board_ip), 
              IP2U32(subnet_mask), IP2U32(gateway), IP2U32(dns_ip)) != 0) {
    Serial.println("Initialization error, check network settings");
    return;
  };
 #endif
  mg_mgr_init(&mgr, NULL);
  Serial.println("Initialization done");  
 }
 void loop() {
  nc = mg_connect(&mgr, s_target_address, rfc_ev_handler);
  if (nc != NULL) {
    mg_set_protocol_http_websocket(nc);
  }
  uint32_t time_to_finish = millis() + 5000;
  while (millis() < time_to_finish) {
    mg_mgr_poll(&mgr, 1000);  
  }
 }
@@ -1,2 +0,0 @@
 # This "makefile" is only intended to prevent errors during main makefile execution
 all:
@@ -1,45 +0,0 @@
 # Arduino Restful Server
 This example demonstrates how to use [Mongoose](https://www.cesanta.com/mongoose) to control Arduino
 using HTTP requests.
 Example just blinks by LED when Mongoose receives HTTP command, but it can be modified to execute any user-specific code.
 At the moment this example supports [Arduino Mega 2560](http://arduino.cc/en/Main/ArduinoBoardMega2560) board (and compatible) with either W5100-based
 network shield (like [Arduino Ethernet Shield](http://arduino.cc/en/Main/ArduinoEthernetShield)) or [CC3000](http://www.ti.com/product/cc3000)-based WIFI Shield.
 ## Build and run instructions:
 ###To run with Arduino Ethernet (W5100) shield:
 1. Add (Sketch->Add file...) the following files to sketch:
     - /mongoose/mongoose.h
     - /mongoose/mongoose.c
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 2. Make `board_ip` and `board_mac` variables suitable for your network and board
 3. Uncomment line `#include <Ethernet.h>`
 4. Compile and flash sketch
 5. Run `curl http://<board_ip/blink`
   LED attached to PIN 13 will blink and board free memory size and board uptime will be displayed.
 ###To run with Adafruit WiFi (CC3000) shield:
 1. Add (Sketch->Add files...) the following files to sketch:
     - /mongoose/mongoose.h
     - /mongoose/mongoose.c
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 2. Import Adafruit CC3000 library for mongoose
    (select Sketch->Import Library...->Add library... and point
     /mongoose/platforms/arduino_wifi_CC3000/adafruit_CC3000_lib_mongoose folder)
 3. Make the following variables suitable for your network
     - `board_ip`
     - `subnet_mask`
     - `gateway`
     - `dns`
     - `wlan_ssid`
     - `wlan_pwd`
     - `wlan_security`
 5. Uncomment line `#include <Adafruit_CC3000.h>`
 4. Compile and flash sketch
 5. Run curl `http://<board_ip/blink`
   LED attached to PIN 13 will blink and board free memory size and board uptime will be displayed.
@@ -1,133 +0,0 @@
 /*
 * Copyright (c) 2015 Cesanta Software Limited
 * All rights reserved
 * 
 * Build and run instructions:
 * To run with Arduino Ethernet (W5100) shield:
 * -----------------------------------------------------------
 *  1. Add (Sketch->Add file...) the following files to sketch:
 *     - /mongoose/mongoose.h
 *     - /mongoose/mongoose.c
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 *  2. Make board_ip and board_mac variables suitable for your network and board
 *  3. Uncomment line #include <Ethernet.h>
 *  4. Compile & flash sketch
 *  5. Run curl http://<board_ip/blink
 *     LED attached to PIN 13 will blink and board free memory size and uptime will responsed
 *
 * To run with Adafruit WiFi (CC3000) shield:
 * -----------------------------------------------------------
 *  1. Add (Sketch->Add files...) the following files to sketch:
 *     - /mongoose/mongoose.h
 *     - /mongoose/mongoose.c
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.h
 *     - /mongoose/platforms/arduino_ethernet_W5100/avrsupport.cpp
 *  2. Import Adafruit CC3000 library for mongoose (select Sketch->Import Library...->Add library... and point 
 *     /mongoose/platforms/arduino_wifi_CC3000/adafruit_CC3000_lib_mongoose folder
 *  3. Make the following variables suitable for your network
 *     - board_ip
 *     - subnet_mask
 *     - gateway
 *     - dns 
 *     - wlan_ssid
 *     - wlan_pwd
 *     - wlan_security
 *  5. Uncomment line #include <Adafruit_CC3000.h>
 *  4. Compile & flash sketch
 *  5. Run curl http://<board_ip/blink
 *     LED attached to PIN 13 will blink and board free memory size and uptime will responsed
 *
 */
 //#include <Ethernet.h>
 //#include <Adafruit_CC3000.h>
 #include <SPI.h>
 #include "mongoose.h"
 // CHANGE THESE VARIABLES
 // NB: Devices with the same address must not end up on the same network.
 // Use MAC address provided by device manufacturer (e.g. on a sticker).
 // If there isn't one, use a random one from the locally administered range.
 // See http://en.wikipedia.org/wiki/MAC_address for details.
 static uint8_t board_mac[] = {
  0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
 };
 static uint8_t board_ip[] = {192, 168, 10, 8};
 #ifdef WIFI_CC3000
 static uint8_t subnet_mask[] = {255, 255, 255, 0};
 static uint8_t gateway[] = {192, 168, 10, 254};
 static uint8_t dns_ip[] = {192, 168, 10, 254};
 static const char *wlan_ssid = "mynetwork";     
 static const char *wlan_pwd = "mypassword";
 static int wlan_security = WLAN_SEC_WPA2;
 #endif
 ///////////////////////////////////////////////
 static const char *s_http_port = "60000";
 static uint32_t IP2U32(uint8_t* iparr) {
  return ((uint32_t)iparr[0] << 24) | ((uint32_t)iparr[1] << 16) | (iparr[2] << 8) | (iparr[3]);
 }
 static void rfs_ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  struct http_message *hm = (struct http_message *) ev_data;
  char buf[100];
  int clen;
  switch (ev) {
    case NS_HTTP_REQUEST:      
      if (mg_vcmp(&hm->uri, "/blink") == 0) {
        blink(1, 500);
      }
      clen = snprintf(buf, sizeof(buf),
                      "Free memory size: %d Uptime: %d",
                      (int)get_freememsize(), (int)time(NULL));
      mg_printf_http_chunk(nc, "HTTP/1.1 200 OK\r\n"
                               "Content-Length: %d\r\n"
                               "Transfer-Encoding: chunked\r\n\r\n"
                               "%s",
                               clen, buf);
      mg_send_http_chunk(nc, "", 0);
      break;
    case NS_SEND:
      nc->flags |= MG_F_CLOSE_IMMEDIATELY;
      break;
    default:
      break;
  }
 }
 static struct mg_connection *nc;
 static struct mg_mgr mgr;
 void setup() {
  Serial.begin(9600);
  Serial.println("Initialization...");
 #if defined(ETHERNET_W5100)
  avr_netinit(board_mac, board_ip);
 #elif defined(WIFI_CC3000)
  if (avr_netinit(wlan_ssid, wlan_pwd, wlan_security, IP2U32(board_ip), 
              IP2U32(subnet_mask), IP2U32(gateway), IP2U32(dns_ip)) != 0) {
    Serial.println("Initialization error, check network settings");
    return;
  };
 #endif
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, rfs_ev_handler);
  mg_set_protocol_http_websocket(nc);
  Serial.println("Initialization done");
 }
 void loop() {
  mg_mgr_poll(&mgr, 1000);
 }
@@ -1,2 +0,0 @@
 PROG = big_upload
 include ../examples.mk
@@ -1,153 +0,0 @@
 // Copyright (c) 2015 Cesanta Software Limited
 // All rights reserved
 //
 // This example demonstrates how to handle very large requests without keeping
 // them in memory.
 #include <stdio.h>
 #include <string.h>
 #include <stdlib.h>
 #include "mongoose.h"
 static const char *s_http_port = "8000";
 struct file_writer_data {
  FILE *fp;
  size_t bytes_left;
 };
 static void handle_request(struct mg_connection *nc) {
  // This handler gets called only when we don't reset proto_handler in
  // handle_recv, so we just return a page unconditionally.
  mg_printf(nc, "%s",
            "HTTP/1.1 200 OK\r\n"
            "Content-Type: text/html\r\n"
            "Connection: close\r\n"
            "\r\n"
            "<html><body>Upload example."
            "<form method=\"POST\" action=\"/upload\" "
            "  enctype=\"multipart/form-data\">"
            "<input type=\"file\" name=\"file\" /> <br/>"
            "<input type=\"submit\" value=\"Upload\" />"
            "</form></body></html>");
  nc->flags |= MG_F_SEND_AND_CLOSE;
 }
 static void handle_recv(struct mg_connection *nc) {
  struct file_writer_data *data = (struct file_writer_data *) nc->user_data;
  if (data == NULL) {
    // This is a new connection, try to parse HTTP request.
    struct http_message hm;
    int req_len = mg_parse_http(nc->recv_mbuf.buf, nc->recv_mbuf.len, &hm,
                                1 /* is_req */);
    if (req_len < 0 ||
        (req_len == 0 && nc->recv_mbuf.len >= MG_MAX_HTTP_REQUEST_SIZE)) {
      nc->flags |= MG_F_CLOSE_IMMEDIATELY;
    } else if (req_len == 0) {
      // Request is not complete yet, do nothing.
    } else if (mg_vcasecmp(&hm.method, "POST") == 0 &&
               mg_vcmp(&hm.uri, "/upload") == 0) {
      // This is the request that we don't want to buffer in memory.
      if (hm.body.len == (size_t) ~0 || hm.body.len == 0) {
        mg_printf(nc, "%s",
                  "HTTP/1.1 411 Content-Length required\r\n"
                  "Content-Length: 0\r\n\r\n");
        nc->flags |= MG_F_SEND_AND_CLOSE;
        return;
      }
      // Reset proto_handler so Mongoose's http_handler() won't get confused
      // once we start removing data from the buffer.
      nc->proto_handler = NULL;
      // Headers will be inaccessible later, so put everything we need into
      // user_data.
      data = calloc(1, sizeof(struct file_writer_data));
      data->bytes_left = hm.body.len;
      data->fp = tmpfile();
      if (data->fp == NULL) {
        mg_printf(nc, "%s",
                  "HTTP/1.1 500 Failed to open a file\r\n"
                  "Content-Length: 0\r\n\r\n");
        nc->flags |= MG_F_SEND_AND_CLOSE;
        return;
      }
      nc->user_data = (void *) data;
      // Remove the headers from the buffer.
      mbuf_remove(&nc->recv_mbuf, hm.body.p - nc->recv_mbuf.buf);
      // Invoke itself again to write the piece of the body that is already in
      // the buffer.
      handle_recv(nc);
    }
  } else {  // data != NULL
    size_t to_write = data->bytes_left, written = 0;
    if (nc->recv_mbuf.len < to_write) to_write = nc->recv_mbuf.len;
    written = fwrite(nc->recv_mbuf.buf, 1, to_write, data->fp);
    mbuf_remove(&nc->recv_mbuf, written);
    data->bytes_left -= written;
    if (data->bytes_left <= 0) {
      // Request is complete, do something meaningful here.
      mg_printf(nc,
                "HTTP/1.1 200 OK\r\n"
                "Content-Type: text/plain\r\n"
                "Connection: close\r\n\r\n"
                "Written %ld of POST data to a temp file\n\n",
                (long) ftell(data->fp));
      nc->flags |= MG_F_SEND_AND_CLOSE;
      // handle_close will free the resources.
    }
  }
 }
 // Make sure we free all allocated resources
 static void handle_close(struct mg_connection *nc) {
  struct file_writer_data *data = (struct file_writer_data *) nc->user_data;
  if (data != NULL) {
    fclose(data->fp);
    free(data);
    nc->user_data = NULL;
  }
 }
 static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  (void) ev_data;
  switch (ev) {
    case MG_EV_HTTP_REQUEST:
      // Invoked when the full HTTP request is in the buffer (including body).
      handle_request(nc);
      break;
    case MG_EV_RECV:
      // Invoked every time new data arrives.
      handle_recv(nc);
      break;
    case MG_EV_CLOSE:
      handle_close(nc);
      break;
  }
 }
 int main(void) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  // Set up HTTP server parameters
  mg_set_protocol_http_websocket(nc);
  printf("Starting web server on port %s\n", s_http_port);
  for (;;) {
    mg_mgr_poll(&mgr, 1000);
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -0,0 +1,11 @@
 PROG ?= example
 CFLAGS ?= -DMG_IO_SIZE=8192 -DMG_ENABLE_LINES
 all: $(PROG)
 	$(DEBUGGER) ./$(PROG) $(ARGS)
 $(PROG): main.c
 	$(CC) ../../mongoose.c -I../.. -W -Wall $(CFLAGS) -o $(PROG) main.c
 clean:
 	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb
@@ -0,0 +1,55 @@
 // Copyright (c) 2020 Cesanta Software Limited
 // All rights reserved
 //
 // Example captive DNS server (captive portal).
 //    1. Run `make`. This builds and starts a server on port 5533
 //    2. Run `dig -t A www.google.com -4 @localhost -p 5533`
 #include "mongoose.h"
 static const char *s_listen_url = "udp://0.0.0.0:5533";
 // DNS answer section. We response with IP 1.2.3.4 - you can change it
 //  in the last 4 bytes of this array
 uint8_t answer[] = {
    0xc0, 0x0c,          // Point to the name in the DNS question
    0,    1,             // 2 bytes - record type, A
    0,    1,             // 2 bytes - address class, INET
    0,    0,    0, 120,  // 4 bytes - TTL
    0,    4,             // 2 bytes - address length
    1,    2,    3, 4     // 4 bytes - IP address
 };
 static void fn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
  if (ev == MG_EV_READ) {
    struct mg_dns_rr rr;  // Parse first question, offset 12 is header size
    size_t n = mg_dns_parse_rr(c->recv.buf, c->recv.len, 12, true, &rr);
    if (n > 0) {
      char buf[12 + n + sizeof(answer)];
      struct mg_dns_header *h = (struct mg_dns_header *) buf;
      memset(buf, 0, sizeof(buf));  // Clear the whole datagram
      h->txnid = ((struct mg_dns_header *) c->recv.buf)->txnid;  // Copy tnxid
      h->num_questions = mg_htons(1);  // We use only the 1st question
      h->num_answers = mg_htons(1);    // And only one answer
      h->flags = mg_htons(0x8400);     // Authoritative response
      memcpy(buf + sizeof(*h), c->recv.buf + sizeof(*h), n);  // Copy question
      memcpy(buf + sizeof(*h) + n, answer, sizeof(answer));   // And answer
      mg_send(c, buf, sizeof(buf));                           // And send it!
    }
    mg_iobuf_delete(&c->recv, c->recv.len);
  }
  (void) fn_data;
  (void) ev_data;
 }
 int main(void) {
  struct mg_mgr mgr;
  mg_log_set("3");                          // Set log level
  mg_mgr_init(&mgr);                        // Initialise event manager
  mg_listen(&mgr, s_listen_url, fn, NULL);  // Start DNS server
  for (;;) mg_mgr_poll(&mgr, 1000);         // Event loop
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,4 +0,0 @@
 PROG = captive_dns_server
 MODULE_CFLAGS=-DMG_ENABLE_DNS_SERVER
 include ../rules.mk
@@ -1,83 +0,0 @@
 /*
 * Copyright (c) 2014 Cesanta Software Limited
 * All rights reserved
 */
 /*
 * Try it out with:
 * $ dig -t A www.google.com -4 @localhost -p 5533
 */
 #include "../../mongoose.h"
 #include <stdio.h>
 static int s_exit_flag = 0;
 static in_addr_t s_our_ip_addr;
 static const char *s_listening_addr = "udp://:5533";
 static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  struct mg_dns_message *msg;
  struct mg_dns_resource_record *rr;
  struct mg_dns_reply reply;
  int i;
  switch (ev) {
    case MG_DNS_MESSAGE:
      msg = (struct mg_dns_message *) ev_data;
      reply = mg_dns_create_reply(&nc->send_mbuf, msg);
      for (i = 0; i < msg->num_questions; i++) {
        rr = &msg->questions[i];
        if (rr->rtype == MG_DNS_A_RECORD) {
          mg_dns_reply_record(&reply, rr, NULL, rr->rtype, 3600,
                              &s_our_ip_addr, 4);
        }
      }
      /*
       * We don't set the error flag even if there were no answers
       * maching the MG_DNS_A_RECORD query type.
       * This indicates that we have (syntetic) answers for MG_DNS_A_RECORD.
       * See http://goo.gl/QWvufr for a distinction between NXDOMAIN and NODATA.
       */
      mg_dns_send_reply(nc, &reply);
      nc->flags |= MG_F_SEND_AND_CLOSE;
      break;
  }
 }
 int main(int argc, char *argv[]) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  int i;
  mg_mgr_init(&mgr, NULL);
  s_our_ip_addr = inet_addr("127.0.0.1");
  /* Parse command line arguments */
  for (i = 1; i < argc; i++) {
    if (strcmp(argv[i], "-D") == 0) {
      mgr.hexdump_file = argv[++i];
    } else if (strcmp(argv[i], "-l") == 0 && i + 1 < argc) {
      s_listening_addr = argv[++i];
    } else {
      s_our_ip_addr = inet_addr(argv[i]);
    }
  }
  fprintf(stderr, "Listening on '%s'\n", s_listening_addr);
  if ((nc = mg_bind(&mgr, s_listening_addr, ev_handler)) == NULL) {
    fprintf(stderr, "cannot bind to socket\n");
    exit(1);
  }
  mg_set_protocol_dns(nc);
  while (s_exit_flag == 0) {
    mg_mgr_poll(&mgr, 1000);
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,14 +0,0 @@
 PROG = coap_client
 SOURCES = $(PROG).c ../../mongoose.c
 CFLAGS = -W -Wall -I../.. $(CFLAGS_EXTRA) -DMG_ENABLE_COAP
 all: $(PROG)
 $(PROG): $(SOURCES)
 	$(CC) $(SOURCES) -o $@ $(CFLAGS)
 $(PROG).exe: $(SOURCES)
 	cl $(SOURCES) /I../.. /MD /Fe$@
 clean:
 	rm -rf *.gc* *.dSYM *.exe *.obj *.o a.out $(PROG)
@@ -1,71 +0,0 @@
 /*
 * Copyright (c) 2015 Cesanta Software Limited
 * All rights reserved
 *
 * This program sends CoAP CON-message to server (coap.me by default)
 * and waits for answer.
 */
 #include "mongoose.h"
 static int s_time_to_exit = 0;
 static char *s_default_address = "udp://coap.me:5683";
 static void coap_handler(struct mg_connection *nc, int ev, void *p) {
  switch (ev) {
    case MG_EV_CONNECT: {
      struct mg_coap_message cm;
      uint32_t res;
      memset(&cm, 0, sizeof(cm));
      cm.msg_id = 1;
      cm.msg_type = MG_COAP_MSG_CON;
      printf("Sending CON...\n");
      res = mg_coap_send_message(nc, &cm);
      if (res == 0) {
        printf("Sent CON with msg_id = %d\n", cm.msg_id);
      } else {
        printf("Error: %d\n", res);
        s_time_to_exit = 1;
      }
      break;
    }
    case MG_EV_COAP_ACK:
    case MG_EV_COAP_RST: {
      struct mg_coap_message *cm = (struct mg_coap_message *) p;
      printf("ACK/RST for message with msg_id = %d received\n", cm->msg_id);
      s_time_to_exit = 1;
      break;
    }
  }
 }
 int main(int argc, char *argv[]) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  char *address = s_default_address;
  if (argc > 1) {
    address = argv[1];
  }
  printf("Using %s as CoAP server\n", address);
  mg_mgr_init(&mgr, 0);
  nc = mg_connect(&mgr, address, coap_handler);
  if (nc == NULL) {
    printf("Unable to connect to %s\n", address);
    return -1;
  }
  mg_set_protocol_coap(nc);
  while (!s_time_to_exit) {
    mg_mgr_poll(&mgr, 1000000);
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,14 +0,0 @@
 PROG = coap_server
 SOURCES = $(PROG).c ../../mongoose.c
 CFLAGS = -W -Wall -I../.. $(CFLAGS_EXTRA) -DMG_ENABLE_COAP
 all: $(PROG)
 $(PROG): $(SOURCES)
 	$(CC) $(SOURCES) -o $@ $(CFLAGS)
 $(PROG).exe: $(SOURCES)
 	cl $(SOURCES) /I../.. /MD /Fe$@
 clean:
 	rm -rf *.gc* *.dSYM *.exe *.obj *.o a.out $(PROG)
@@ -1,72 +0,0 @@
 /*
 * Copyright (c) 2015 Cesanta Software Limited
 * All rights reserved
 *
 * This program listens on 5683 for CoAP messages,
 * sends ACK is nessesary and dump everything received.
 * It is possible to use ../coap_client to send message.
 */
 #include "mongoose.h"
 static char *s_default_address = "udp://:5683";
 static int s_sig_received = 0;
 static void signal_handler(int sig_num) {
  signal(sig_num, signal_handler);
  s_sig_received = sig_num;
 }
 static void coap_handler(struct mg_connection *nc, int ev, void *p) {
  switch (ev) {
    case MG_EV_COAP_CON: {
      uint32_t res;
      struct mg_coap_message *cm = (struct mg_coap_message *) p;
      printf("CON with msg_id = %d received\n", cm->msg_id);
      res = mg_coap_send_ack(nc, cm->msg_id);
      if (res == 0) {
        printf("Successfully sent ACK for message with msg_id = %d\n",
               cm->msg_id);
      } else {
        printf("Error: %d\n", res);
      }
      break;
    }
    case MG_EV_COAP_NOC:
    case MG_EV_COAP_ACK:
    case MG_EV_COAP_RST: {
      struct mg_coap_message *cm = (struct mg_coap_message *) p;
      printf("ACK/RST/NOC with msg_id = %d received\n", cm->msg_id);
      break;
    }
  }
 }
 int main() {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  signal(SIGTERM, signal_handler);
  signal(SIGINT, signal_handler);
  mg_mgr_init(&mgr, 0);
  nc = mg_bind(&mgr, s_default_address, coap_handler);
  if (nc == NULL) {
    printf("Unable to start listener at %s\n", s_default_address);
    return -1;
  }
  printf("Listening for CoAP messages at %s\n", s_default_address);
  mg_set_protocol_coap(nc);
  while (!s_sig_received) {
    mg_mgr_poll(&mgr, 1000000);
  }
  printf("Exiting on signal %d\n", s_sig_received);
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -0,0 +1,10 @@
 PROG ?= example
 all: $(PROG)
 	$(DEBUGGER) ./$(PROG)
 $(PROG):
 	$(CC) ../../mongoose.c -I../.. $(CFLAGS) $(EXTRA) -o $(PROG) main.c mjson.c
 clean:
 	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb log.txt
@@ -0,0 +1,34 @@
 # A complete device dashboard
 This example is a demonstration of how Mongoose Library could be integrated
 into an embedded device and provide a complete device dashbord with the
 following features:
 - Multiple logins with different permissions (admin and user)
 - Login screen for non-authenticated connections
 - A [preact](https://preactjs.com/)-based dashboard with multiple pages
 - Internal variables
 - A form that changes those variables
 - All changes are propagates to all connected clients
 - Live log stream
 - Live video stream
 In essense, this example is a combination of several other examples
 pulled together (multiple-logins, dashboard, live-log, video-stream).
 # Screenshots
 This is a login screen that prompts for user/password
 ![](screenshots/login.png)
 # Main dashboard
 A main dashboard page shows internal data, live video stream, and a form
 ![](screenshots/dashboard.png)
 A live log page shows live log stream coming from device
 ![](screenshots/logs.png)
@@ -0,0 +1,204 @@
 // Copyright (c) 2020 Cesanta Software Limited
 // All rights reserved
 #include "mjson.h"
 #include "mongoose.h"
 // Authenticated user.
 // A user can be authenticated by:
 //   - a name:pass pair
 //   - a token
 // When a user is shown a login screen, she enters a user:pass. If successful,
 // a server returns user info which includes token. From that point on,
 // client can use token for authentication. Tokens could be refreshed/changed
 // on a server side, forcing clients to re-login.
 struct user {
  const char *name, *pass, *token;
 };
 // This is a configuration structure we're going to show on a dashboard
 static struct config {
  int value1;
  char *value2;
 } s_config = {123, NULL};
 // Stringifies the config. A caller must free() it.
 static char *stringify_config(struct config *cfg) {
  char *s = NULL;
  mjson_printf(mjson_print_dynamic_buf, &s, "{%Q:%d,%Q:%Q}", "value1",
               cfg->value1, "value2", cfg->value2);
  return s;
 }
 // Update config structure. Return true if changed, false otherwise
 static bool update_config(struct mg_http_message *hm, struct config *cfg) {
  bool changed = false;
  char buf[256];
  double dv;
  if (mjson_get_number(hm->body.ptr, hm->body.len, "$.value1", &dv)) {
    s_config.value1 = dv;
    changed = true;
  }
  if (mjson_get_string(hm->body.ptr, hm->body.len, "$.value2", buf,
                       sizeof(buf)) > 0) {
    free(s_config.value2);
    s_config.value2 = strdup(buf);
    changed = true;
  }
  return changed;
 }
 // Parse HTTP requests, return authenticated user or NULL
 static struct user *getuser(struct mg_http_message *hm) {
  // In production, make passwords strong and tokens randomly generated
  // In this example, user list is kept in RAM. In production, it can
  // be backed by file, database, or some other method.
  static struct user users[] = {
      {"admin", "admin", "admin_token"},
      {"user1", "pass1", "user1_token"},
      {"user2", "pass2", "user2_token"},
      {NULL, NULL, NULL},
  };
  char user[256], pass[256];
  struct user *u;
  mg_http_creds(hm, user, sizeof(user), pass, sizeof(pass));
  if (user[0] != '\0' && pass[0] != '\0') {
    // Both user and password is set, search by user/password
    for (u = users; u->name != NULL; u++)
      if (strcmp(user, u->name) == 0 && strcmp(pass, u->pass) == 0) return u;
  } else if (user[0] == '\0') {
    // Only password is set, search by token
    for (u = users; u->name != NULL; u++)
      if (strcmp(pass, u->token) == 0) return u;
  }
  return NULL;
 }
 // Notify all config watchers about the config change
 static void notify_config_change(struct mg_mgr *mgr) {
  struct mg_connection *c;
  char *s = stringify_config(&s_config);
  for (c = mgr->conns; c != NULL; c = c->next) {
    if (c->label[0] == 'W') mg_http_printf_chunk(c, "%s\n", s);
  }
  free(s);
 }
 // HTTP request handler function
 static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
  if (ev == MG_EV_HTTP_MSG) {
    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
    struct user *u = getuser(hm);
    // LOG(LL_INFO, ("%p [%.*s] auth %s", c->fd, (int) hm->uri.len, hm->uri.ptr,
    // u ? u->name : "NULL"));
    if (u == NULL && mg_http_match_uri(hm, "/api/#")) {
      // All URIs starting with /api/ must be authenticated
      mg_printf(c, "%s", "HTTP/1.1 403 Denied\r\nContent-Length: 0\r\n\r\n");
    } else if (mg_http_match_uri(hm, "/api/config/get")) {
      char *s = stringify_config(&s_config);
      mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Length: %d\r\n\r\n%s\n",
                (int) strlen(s) + 1, s);
      free(s);
    } else if (mg_http_match_uri(hm, "/api/config/set")) {
      // Admins only
      if (strcmp(u->name, "admin") == 0) {
        if (update_config(hm, &s_config)) notify_config_change(fn_data);
        mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
      } else {
        mg_printf(c, "%s", "HTTP/1.1 403 Denied\r\nContent-Length: 0\r\n\r\n");
      }
    } else if (mg_http_match_uri(hm, "/api/config/watch")) {
      c->label[0] = 'W';  // Mark ourselves as a config watcher
      mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
    } else if (mg_http_match_uri(hm, "/api/video1")) {
      c->label[0] = 'S';  // Mark that connection as live streamer
      mg_printf(
          c, "%s",
          "HTTP/1.0 200 OK\r\n"
          "Cache-Control: no-cache\r\n"
          "Pragma: no-cache\r\nExpires: Thu, 01 Dec 1994 16:00:00 GMT\r\n"
          "Content-Type: multipart/x-mixed-replace; boundary=--foo\r\n\r\n");
    } else if (mg_http_match_uri(hm, "/api/log/static")) {
      mg_http_serve_file(c, hm, "log.txt", "text/plain", "");
    } else if (mg_http_match_uri(hm, "/api/log/live")) {
      c->label[0] = 'L';  // Mark that connection as live log listener
      mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
    } else if (mg_http_match_uri(hm, "/api/login")) {
      mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
      mg_http_printf_chunk(c, "{\"user\":\"%s\",\"token\":\"%s\"}\n", u->name,
                           u->token);
      mg_http_printf_chunk(c, "");
    } else {
      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
      mg_http_serve_dir(c, ev_data, &opts);
    }
  }
 }
 // The image stream is simulated by sending MJPEG frames specified by the
 // "files" array of file names.
 static void broadcast_mjpeg_frame(struct mg_mgr *mgr) {
  const char *files[] = {"images/1.jpg", "images/2.jpg", "images/3.jpg",
                         "images/4.jpg", "images/5.jpg", "images/6.jpg"};
  size_t nfiles = sizeof(files) / sizeof(files[0]);
  static size_t i;
  const char *path = files[i++ % nfiles];
  size_t size = mg_file_size(path);
  char *data = mg_file_read(path);  // Read next file
  struct mg_connection *c;
  for (c = mgr->conns; c != NULL; c = c->next) {
    if (c->label[0] != 'S') continue;         // Skip non-stream connections
    if (data == NULL || size == 0) continue;  // Skip on file read error
    mg_printf(c,
              "--foo\r\nContent-Type: image/jpeg\r\n"
              "Content-Length: %lu\r\n\r\n",
              (unsigned long) size);
    mg_send(c, data, size);
    mg_send(c, "\r\n", 2);
  }
  free(data);
 }
 static void mjpeg_cb(void *arg) {
  broadcast_mjpeg_frame(arg);
 }
 static void log_message(const char *filename, const char *message) {
  FILE *fp = fopen(filename, "a");
  if (fp != NULL) {
    fprintf(fp, "%s", message);
    fclose(fp);
  }
 }
 static void broadcast_message(struct mg_mgr *mgr, const char *message) {
  struct mg_connection *c;
  for (c = mgr->conns; c != NULL; c = c->next) {
    if (c->label[0] == 'L') mg_http_printf_chunk(c, "%s", message);
  }
 }
 // Timer function - called periodically.
 // Prepare log message. Save it to a file, and broadcast.
 static void log_cb(void *arg) {
  char buf[64];
  snprintf(buf, sizeof(buf), "Time is: %lu\n", (unsigned long) time(NULL));
  log_message("log.txt", buf);
  broadcast_message(arg, buf);
 }
 int main(void) {
  struct mg_mgr mgr;
  struct mg_timer t1, t2;
  mg_mgr_init(&mgr);
  mg_http_listen(&mgr, "http://localhost:8000", cb, &mgr);
  mg_timer_init(&t1, 500, MG_TIMER_REPEAT, mjpeg_cb, &mgr);
  mg_timer_init(&t2, 1000, MG_TIMER_REPEAT, log_cb, &mgr);
  for (;;) mg_mgr_poll(&mgr, 50);
  mg_timer_free(&t1);
  mg_timer_free(&t2);
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -0,0 +1,981 @@
 // Copyright (c) 2018-2020 Cesanta Software Limited
 // All rights reserved
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 #include "mjson.h"
 #if !defined(_MSC_VER) || _MSC_VER >= 1700
 #else
 #define va_copy(x, y) (x) = (y)
 #define snprintf _snprintf
 #define alloca _alloca
 #endif
 static int mjson_esc(int c, int esc) {
  const char *p, *esc1 = "\b\f\n\r\t\\\"", *esc2 = "bfnrt\\\"";
  for (p = esc ? esc1 : esc2; *p != '\0'; p++) {
    if (*p == c) return esc ? esc2[p - esc1] : esc1[p - esc2];
  }
  return 0;
 }
 static int mjson_pass_string(const char *s, int len) {
  int i;
  for (i = 0; i < len; i++) {
    if (s[i] == '\\' && i + 1 < len && mjson_esc(s[i + 1], 1)) {
      i++;
    } else if (s[i] == '\0') {
      return MJSON_ERROR_INVALID_INPUT;
    } else if (s[i] == '"') {
      return i;
    }
  }
  return MJSON_ERROR_INVALID_INPUT;
 }
 int mjson(const char *s, int len, mjson_cb_t cb, void *ud) {
  enum { S_VALUE, S_KEY, S_COLON, S_COMMA_OR_EOO } expecting = S_VALUE;
  unsigned char nesting[MJSON_MAX_DEPTH];
  int i, depth = 0;
 #define MJSONCALL(ev) \
  if (cb != NULL && cb(ev, s, start, i - start + 1, ud)) return i + 1;
 // In the ascii table, the distance between `[` and `]` is 2.
 // Ditto for `{` and `}`. Hence +2 in the code below.
 #define MJSONEOO()                                                     \
  do {                                                                 \
    if (c != nesting[depth - 1] + 2) return MJSON_ERROR_INVALID_INPUT; \
    depth--;                                                           \
    if (depth == 0) {                                                  \
      MJSONCALL(tok);                                                  \
      return i + 1;                                                    \
    }                                                                  \
  } while (0)
  for (i = 0; i < len; i++) {
    int start = i;
    unsigned char c = ((unsigned char *) s)[i];
    int tok = c;
    if (c == ' ' || c == '\t' || c == '\n' || c == '\r') continue;
    // printf("- %c [%.*s] %d %d\n", c, i, s, depth, expecting);
    switch (expecting) {
      case S_VALUE:
        if (c == '{') {
          if (depth >= (int) sizeof(nesting)) return MJSON_ERROR_TOO_DEEP;
          nesting[depth++] = c;
          expecting = S_KEY;
          break;
        } else if (c == '[') {
          if (depth >= (int) sizeof(nesting)) return MJSON_ERROR_TOO_DEEP;
          nesting[depth++] = c;
          break;
        } else if (c == ']' && depth > 0) {  // Empty array
          MJSONEOO();
        } else if (c == 't' && i + 3 < len && memcmp(&s[i], "true", 4) == 0) {
          i += 3;
          tok = MJSON_TOK_TRUE;
        } else if (c == 'n' && i + 3 < len && memcmp(&s[i], "null", 4) == 0) {
          i += 3;
          tok = MJSON_TOK_NULL;
        } else if (c == 'f' && i + 4 < len && memcmp(&s[i], "false", 5) == 0) {
          i += 4;
          tok = MJSON_TOK_FALSE;
        } else if (c == '-' || ((c >= '0' && c <= '9'))) {
          char *end = NULL;
          strtod(&s[i], &end);
          if (end != NULL) i += end - &s[i] - 1;
          tok = MJSON_TOK_NUMBER;
        } else if (c == '"') {
          int n = mjson_pass_string(&s[i + 1], len - i - 1);
          if (n < 0) return n;
          i += n + 1;
          tok = MJSON_TOK_STRING;
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        if (depth == 0) {
          MJSONCALL(tok);
          return i + 1;
        }
        expecting = S_COMMA_OR_EOO;
        break;
      case S_KEY:
        if (c == '"') {
          int n = mjson_pass_string(&s[i + 1], len - i - 1);
          if (n < 0) return n;
          i += n + 1;
          tok = MJSON_TOK_KEY;
          expecting = S_COLON;
        } else if (c == '}') {  // Empty object
          MJSONEOO();
          expecting = S_COMMA_OR_EOO;
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        break;
      case S_COLON:
        if (c == ':') {
          expecting = S_VALUE;
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        break;
      case S_COMMA_OR_EOO:
        if (depth <= 0) return MJSON_ERROR_INVALID_INPUT;
        if (c == ',') {
          expecting = (nesting[depth - 1] == '{') ? S_KEY : S_VALUE;
        } else if (c == ']' || c == '}') {
          MJSONEOO();
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        break;
    }
    MJSONCALL(tok);
  }
  return MJSON_ERROR_INVALID_INPUT;
 }
 struct msjon_get_data {
  const char *path;     // Lookup json path
  int pos;              // Current path index
  int d1;               // Current depth of traversal
  int d2;               // Expected depth of traversal
  int i1;               // Index in an array
  int i2;               // Expected index in an array
  int obj;              // If the value is array/object, offset where it starts
  const char **tokptr;  // Destination
  int *toklen;          // Destination length
  int tok;              // Returned token
 };
 static int mjson_plen(const char *s) {
  int i = 0;
  while (s[i] != '\0' && s[i] != '.' && s[i] != '[') i++;
  return i;
 }
 static int mjson_get_cb(int tok, const char *s, int off, int len, void *ud) {
  struct msjon_get_data *data = (struct msjon_get_data *) ud;
  // printf("--> %2x %2d %2d %2d %2d\t'%s'\t'%.*s'\t\t'%.*s'\n", tok, data->d1,
  // data->d2, data->i1, data->i2, data->path + data->pos, off, s, len,
  // s + off);
  if (data->tok != MJSON_TOK_INVALID) return 1;  // Found
  if (tok == '{') {
    if (!data->path[data->pos] && data->d1 == data->d2) data->obj = off;
    data->d1++;
  } else if (tok == '[') {
    if (data->d1 == data->d2 && data->path[data->pos] == '[') {
      data->i1 = 0;
      data->i2 = (int) strtod(&data->path[data->pos + 1], NULL);
      if (data->i1 == data->i2) {
        data->d2++;
        data->pos += 3;
      }
    }
    if (!data->path[data->pos] && data->d1 == data->d2) data->obj = off;
    data->d1++;
  } else if (tok == ',') {
    if (data->d1 == data->d2 + 1) {
      data->i1++;
      if (data->i1 == data->i2) {
        while (data->path[data->pos] != ']') data->pos++;
        data->pos++;
        data->d2++;
      }
    }
  } else if (tok == MJSON_TOK_KEY && data->d1 == data->d2 + 1 &&
             data->path[data->pos] == '.' && s[off] == '"' &&
             s[off + len - 1] == '"' &&
             mjson_plen(&data->path[data->pos + 1]) == len - 2 &&
             !memcmp(s + off + 1, &data->path[data->pos + 1], len - 2)) {
    data->d2++;
    data->pos += len - 1;
  } else if (tok == MJSON_TOK_KEY && data->d1 == data->d2) {
    return 1;  // Exhausted path, not found
  } else if (tok == '}' || tok == ']') {
    data->d1--;
    // data->d2--;
    if (!data->path[data->pos] && data->d1 == data->d2 && data->obj != -1) {
      data->tok = tok - 2;
      if (data->tokptr) *data->tokptr = s + data->obj;
      if (data->toklen) *data->toklen = off - data->obj + 1;
      return 1;
    }
  } else if (MJSON_TOK_IS_VALUE(tok)) {
    // printf("TOK --> %d\n", tok);
    if (data->d1 == data->d2 && !data->path[data->pos]) {
      data->tok = tok;
      if (data->tokptr) *data->tokptr = s + off;
      if (data->toklen) *data->toklen = len;
      return 1;
    }
  }
  return 0;
 }
 enum mjson_tok mjson_find(const char *s, int len, const char *jp,
                          const char **tokptr, int *toklen) {
  struct msjon_get_data data = {jp, 1,  0,      0,      0,
                                0,  -1, tokptr, toklen, MJSON_TOK_INVALID};
  if (jp[0] != '$') return MJSON_TOK_INVALID;
  if (mjson(s, len, mjson_get_cb, &data) < 0) return MJSON_TOK_INVALID;
  return (enum mjson_tok) data.tok;
 }
 int mjson_get_number(const char *s, int len, const char *path, double *v) {
  const char *p;
  int tok, n;
  if ((tok = mjson_find(s, len, path, &p, &n)) == MJSON_TOK_NUMBER) {
    if (v != NULL) *v = strtod(p, NULL);
  }
  return tok == MJSON_TOK_NUMBER ? 1 : 0;
 }
 int mjson_get_bool(const char *s, int len, const char *path, int *v) {
  int tok = mjson_find(s, len, path, NULL, NULL);
  if (tok == MJSON_TOK_TRUE && v != NULL) *v = 1;
  if (tok == MJSON_TOK_FALSE && v != NULL) *v = 0;
  return tok == MJSON_TOK_TRUE || tok == MJSON_TOK_FALSE ? 1 : 0;
 }
 static int mjson_unescape(const char *s, int len, char *to, int n) {
  int i, j;
  for (i = 0, j = 0; i < len && j < n; i++, j++) {
    if (s[i] == '\\' && i + 1 < len) {
      int c = mjson_esc(s[i + 1], 0);
      if (c == 0) return -1;
      to[j] = c;
      i++;
    } else {
      to[j] = s[i];
    }
  }
  if (j >= n) return -1;
  if (n > 0) to[j] = '\0';
  return j;
 }
 int mjson_get_string(const char *s, int len, const char *path, char *to,
                     int n) {
  const char *p;
  int sz;
  if (mjson_find(s, len, path, &p, &sz) != MJSON_TOK_STRING) return -1;
  return mjson_unescape(p + 1, sz - 2, to, n);
 }
 int mjson_get_hex(const char *s, int len, const char *x, char *to, int n) {
  const char *p;
  int i, j, sz;
  if (mjson_find(s, len, x, &p, &sz) != MJSON_TOK_STRING) return -1;
  for (i = j = 0; i < sz - 3 && j < n; i += 2, j++) {
 #define HEXTOI(x) (x >= '0' && x <= '9' ? x - '0' : x - 'W')
    unsigned char a = *(const unsigned char *) (p + i + 1);
    unsigned char b = *(const unsigned char *) (p + i + 2);
    ((unsigned char *) to)[j] = (HEXTOI(a) << 4) | HEXTOI(b);
  }
  if (j < n) to[j] = '\0';
  return j;
 }
 #if MJSON_ENABLE_BASE64
 static int mjson_base64rev(int c) {
  if (c >= 'A' && c <= 'Z') {
    return c - 'A';
  } else if (c >= 'a' && c <= 'z') {
    return c + 26 - 'a';
  } else if (c >= '0' && c <= '9') {
    return c + 52 - '0';
  } else if (c == '+') {
    return 62;
  } else if (c == '/') {
    return 63;
  } else {
    return 64;
  }
 }
 int mjson_base64_dec(const char *src, int n, char *dst, int dlen) {
  const char *end = src + n;
  int len = 0;
  while (src + 3 < end && len < dlen) {
    int a = mjson_base64rev(src[0]), b = mjson_base64rev(src[1]),
        c = mjson_base64rev(src[2]), d = mjson_base64rev(src[3]);
    dst[len++] = (a << 2) | (b >> 4);
    if (src[2] != '=' && len < dlen) {
      dst[len++] = (b << 4) | (c >> 2);
      if (src[3] != '=' && len < dlen) {
        dst[len++] = (c << 6) | d;
      }
    }
    src += 4;
  }
  if (len < dlen) dst[len] = '\0';
  return len;
 }
 int mjson_get_base64(const char *s, int len, const char *path, char *to,
                     int n) {
  const char *p;
  int sz;
  if (mjson_find(s, len, path, &p, &sz) != MJSON_TOK_STRING) return 0;
  return mjson_base64_dec(p + 1, sz - 2, to, n);
 }
 #endif  // MJSON_ENABLE_BASE64
 #if MJSON_ENABLE_NEXT
 struct nextdata {
  int off, len, depth, t, vo, arrayindex;
  int *koff, *klen, *voff, *vlen, *vtype;
 };
 static int next_cb(int tok, const char *s, int off, int len, void *ud) {
  struct nextdata *d = (struct nextdata *) ud;
  // int i;
  switch (tok) {
    case '{':
    case '[':
      if (d->depth == 0 && tok == '[') d->arrayindex = 0;
      if (d->depth == 1 && off > d->off) {
        d->vo = off;
        d->t = tok == '{' ? MJSON_TOK_OBJECT : MJSON_TOK_ARRAY;
        if (d->voff) *d->voff = off;
        if (d->vtype) *d->vtype = d->t;
      }
      d->depth++;
      break;
    case '}':
    case ']':
      d->depth--;
      if (d->depth == 1 && d->vo) {
        d->len = off + len;
        if (d->vlen) *d->vlen = d->len - d->vo;
        if (d->arrayindex >= 0) {
          if (d->koff) *d->koff = d->arrayindex;  // koff holds array index
          if (d->klen) *d->klen = 0;              // klen holds 0
        }
        return 1;
      }
      if (d->depth == 1 && d->arrayindex >= 0) d->arrayindex++;
      break;
    case ',':
    case ':':
      break;
    case MJSON_TOK_KEY:
      if (d->depth == 1 && d->off < off) {
        if (d->koff) *d->koff = off;  // And report back to the user
        if (d->klen) *d->klen = len;  // If we have to
      }
      break;
    default:
      if (d->depth != 1) break;
      // If we're iterating over the array
      if (off > d->off) {
        d->len = off + len;
        if (d->vlen) *d->vlen = len;    // value length
        if (d->voff) *d->voff = off;    // value offset
        if (d->vtype) *d->vtype = tok;  // value type
        if (d->arrayindex >= 0) {
          if (d->koff) *d->koff = d->arrayindex;  // koff holds array index
          if (d->klen) *d->klen = 0;              // klen holds 0
        }
        return 1;
      }
      if (d->arrayindex >= 0) d->arrayindex++;
      break;
  }
  (void) s;
  return 0;
 }
 int mjson_next(const char *s, int n, int off, int *koff, int *klen, int *voff,
               int *vlen, int *vtype) {
  struct nextdata d = {off, 0, 0, 0, 0, -1, koff, klen, voff, vlen, vtype};
  mjson(s, n, next_cb, &d);
  return d.len;
 }
 #endif
 #if MJSON_ENABLE_PRINT
 int mjson_print_fixed_buf(const char *ptr, int len, void *fndata) {
  struct mjson_fixedbuf *fb = (struct mjson_fixedbuf *) fndata;
  int i, left = fb->size - 1 - fb->len;
  if (left < len) len = left;
  for (i = 0; i < len; i++) fb->ptr[fb->len + i] = ptr[i];
  fb->len += len;
  fb->ptr[fb->len] = '\0';
  return len;
 }
 int mjson_print_dynamic_buf(const char *ptr, int len, void *fndata) {
  char *s, *buf = *(char **) fndata;
  int curlen = buf == NULL ? 0 : strlen(buf);
  if ((s = (char *) realloc(buf, curlen + len + 1)) == NULL) {
    return 0;
  } else {
    memcpy(s + curlen, ptr, len);
    s[curlen + len] = '\0';
    *(char **) fndata = s;
    return len;
  }
 }
 int mjson_print_null(const char *ptr, int len, void *userdata) {
  (void) ptr;
  (void) userdata;
  return len;
 }
 int mjson_print_file(const char *ptr, int len, void *userdata) {
  return fwrite(ptr, 1, len, (FILE *) userdata);
 }
 int mjson_print_buf(mjson_print_fn_t fn, void *fndata, const char *buf,
                    int len) {
  return fn(buf, len, fndata);
 }
 int mjson_print_int(mjson_print_fn_t fn, void *fndata, int value,
                    int is_signed) {
  char buf[20];
  int len = snprintf(buf, sizeof(buf), is_signed ? "%d" : "%u", value);
  return fn(buf, len, fndata);
 }
 int mjson_print_long(mjson_print_fn_t fn, void *fndata, long value,
                     int is_signed) {
  char buf[20];
  const char *fmt = (is_signed ? "%ld" : "%lu");
  int len = snprintf(buf, sizeof(buf), fmt, value);
  return fn(buf, len, fndata);
 }
 int mjson_print_dbl(mjson_print_fn_t fn, void *fndata, double d,
                    const char *fmt) {
  char buf[40];
  int n = snprintf(buf, sizeof(buf), fmt, d);
  return fn(buf, n, fndata);
 }
 int mjson_print_str(mjson_print_fn_t fn, void *fndata, const char *s, int len) {
  int i, n = fn("\"", 1, fndata);
  for (i = 0; i < len; i++) {
    char c = mjson_esc(s[i], 1);
    if (c) {
      n += fn("\\", 1, fndata);
      n += fn(&c, 1, fndata);
    } else {
      n += fn(&s[i], 1, fndata);
    }
  }
  return n + fn("\"", 1, fndata);
 }
 #if MJSON_ENABLE_BASE64
 int mjson_print_b64(mjson_print_fn_t fn, void *fndata, const unsigned char *s,
                    int n) {
  const char *t =
      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  int i, len = fn("\"", 1, fndata);
  for (i = 0; i < n; i += 3) {
    int a = s[i], b = i + 1 < n ? s[i + 1] : 0, c = i + 2 < n ? s[i + 2] : 0;
    char buf[4] = {t[a >> 2], t[(a & 3) << 4 | (b >> 4)], '=', '='};
    if (i + 1 < n) buf[2] = t[(b & 15) << 2 | (c >> 6)];
    if (i + 2 < n) buf[3] = t[c & 63];
    len += fn(buf, sizeof(buf), fndata);
  }
  return len + fn("\"", 1, fndata);
 }
 #endif /* MJSON_ENABLE_BASE64 */
 int mjson_vprintf(mjson_print_fn_t fn, void *fndata, const char *fmt,
                  va_list xap) {
  int i = 0, n = 0;
  va_list ap;
  va_copy(ap, xap);
  while (fmt[i] != '\0') {
    if (fmt[i] == '%') {
      char fc = fmt[++i];
      int is_long = 0;
      if (fc == 'l') {
        is_long = 1;
        fc = fmt[i + 1];
      }
      if (fc == 'Q') {
        char *buf = va_arg(ap, char *);
        n += mjson_print_str(fn, fndata, buf ? buf : "", buf ? strlen(buf) : 0);
      } else if (strncmp(&fmt[i], ".*Q", 3) == 0) {
        int len = va_arg(ap, int);
        char *buf = va_arg(ap, char *);
        n += mjson_print_str(fn, fndata, buf, len);
        i += 2;
      } else if (fc == 'd' || fc == 'u') {
        int is_signed = (fc == 'd');
        if (is_long) {
          long val = va_arg(ap, long);
          n += mjson_print_long(fn, fndata, val, is_signed);
          i++;
        } else {
          int val = va_arg(ap, int);
          n += mjson_print_int(fn, fndata, val, is_signed);
        }
      } else if (fc == 'B') {
        const char *s = va_arg(ap, int) ? "true" : "false";
        n += mjson_print_buf(fn, fndata, s, strlen(s));
      } else if (fc == 's') {
        char *buf = va_arg(ap, char *);
        n += mjson_print_buf(fn, fndata, buf, strlen(buf));
      } else if (strncmp(&fmt[i], ".*s", 3) == 0) {
        int len = va_arg(ap, int);
        char *buf = va_arg(ap, char *);
        n += mjson_print_buf(fn, fndata, buf, len);
        i += 2;
      } else if (fc == 'g') {
        n += mjson_print_dbl(fn, fndata, va_arg(ap, double), "%g");
      } else if (fc == 'f') {
        n += mjson_print_dbl(fn, fndata, va_arg(ap, double), "%f");
 #if MJSON_ENABLE_BASE64
      } else if (fc == 'V') {
        int len = va_arg(ap, int);
        const char *buf = va_arg(ap, const char *);
        n += mjson_print_b64(fn, fndata, (unsigned char *) buf, len);
 #endif
      } else if (fc == 'H') {
        const char *hex = "0123456789abcdef";
        int i, len = va_arg(ap, int);
        const unsigned char *p = va_arg(ap, const unsigned char *);
        n += fn("\"", 1, fndata);
        for (i = 0; i < len; i++) {
          n += fn(&hex[(p[i] >> 4) & 15], 1, fndata);
          n += fn(&hex[p[i] & 15], 1, fndata);
        }
        n += fn("\"", 1, fndata);
      } else if (fc == 'M') {
        mjson_vprint_fn_t vfn = va_arg(ap, mjson_vprint_fn_t);
        n += vfn(fn, fndata, &ap);
      }
      i++;
    } else {
      n += mjson_print_buf(fn, fndata, &fmt[i++], 1);
    }
  }
  va_end(xap);
  va_end(ap);
  return n;
 }
 int mjson_printf(mjson_print_fn_t fn, void *fndata, const char *fmt, ...) {
  va_list ap;
  int len;
  va_start(ap, fmt);
  len = mjson_vprintf(fn, fndata, fmt, ap);
  va_end(ap);
  return len;
 }
 #endif /* MJSON_ENABLE_PRINT */
 #if MJSON_IMPLEMENT_STRTOD
 static inline int is_digit(int c) {
  return c >= '0' && c <= '9';
 }
 /* NOTE: strtod() implementation by Yasuhiro Matsumoto. */
 double strtod(const char *str, char **end) {
  double d = 0.0;
  int sign = 1, n = 0;
  const char *p = str, *a = str;
  /* decimal part */
  if (*p == '-') {
    sign = -1;
    ++p;
  } else if (*p == '+')
    ++p;
  if (is_digit(*p)) {
    d = (double) (*p++ - '0');
    while (*p && is_digit(*p)) {
      d = d * 10.0 + (double) (*p - '0');
      ++p;
      ++n;
    }
    a = p;
  } else if (*p != '.')
    goto done;
  d *= sign;
  /* fraction part */
  if (*p == '.') {
    double f = 0.0;
    double base = 0.1;
    ++p;
    if (is_digit(*p)) {
      while (*p && is_digit(*p)) {
        f += base * (*p - '0');
        base /= 10.0;
        ++p;
        ++n;
      }
    }
    d += f * sign;
    a = p;
  }
  /* exponential part */
  if ((*p == 'E') || (*p == 'e')) {
    int e = 0;
    ++p;
    sign = 1;
    if (*p == '-') {
      sign = -1;
      ++p;
    } else if (*p == '+')
      ++p;
    if (is_digit(*p)) {
      while (*p == '0') ++p;
      e = (int) (*p++ - '0');
      while (*p && is_digit(*p)) {
        e = e * 10 + (int) (*p - '0');
        ++p;
      }
      e *= sign;
    } else if (!is_digit(*(a - 1))) {
      a = str;
      goto done;
    } else if (*p == 0)
      goto done;
    if (d == 2.2250738585072011 && e == -308) {
      d = 0.0;
      a = p;
      goto done;
    }
    if (d == 2.2250738585072012 && e <= -308) {
      d *= 1.0e-308;
      a = p;
      goto done;
    }
    {
      int i;
      for (i = 0; i < 10; i++) d *= 10;
    }
    a = p;
  } else if (p > str && !is_digit(*(p - 1))) {
    a = str;
    goto done;
  }
 done:
  if (end) *end = (char *) a;
  return d;
 }
 #endif
 #if MJSON_ENABLE_MERGE
 int mjson_merge(const char *s, int n, const char *s2, int n2,
                mjson_print_fn_t fn, void *userdata) {
  int koff, klen, voff, vlen, t, t2, k, off = 0, len = 0, comma = 0;
  if (n < 2) return len;
  len += fn("{", 1, userdata);
  while ((off = mjson_next(s, n, off, &koff, &klen, &voff, &vlen, &t)) != 0) {
 #if !defined(_MSC_VER) || _MSC_VER >= 1700
    char path[klen + 1];
 #else
    char *path = (char *) alloca(klen + 1);
 #endif
    const char *val;
    memcpy(path, "$.", 2);
    memcpy(path + 2, s + koff + 1, klen - 2);
    path[klen] = '\0';
    if ((t2 = mjson_find(s2, n2, path, &val, &k)) != MJSON_TOK_INVALID) {
      if (t2 == MJSON_TOK_NULL) continue;  // null deletes the key
    } else {
      val = s + voff;  // Key is not found in the update. Copy the old value.
    }
    if (comma) len += fn(",", 1, userdata);
    len += fn(s + koff, klen, userdata);
    len += fn(":", 1, userdata);
    if (t == MJSON_TOK_OBJECT && t2 == MJSON_TOK_OBJECT) {
      len += mjson_merge(s + voff, vlen, val, k, fn, userdata);
    } else {
      if (t2 != MJSON_TOK_INVALID) vlen = k;
      len += fn(val, vlen, userdata);
    }
    comma = 1;
  }
  // Add missing keys
  off = 0;
  while ((off = mjson_next(s2, n2, off, &koff, &klen, &voff, &vlen, &t)) != 0) {
 #if !defined(_MSC_VER) || _MSC_VER >= 1700
    char path[klen + 1];
 #else
    char *path = (char *) alloca(klen + 1);
 #endif
    const char *val;
    if (t == MJSON_TOK_NULL) continue;
    memcpy(path, "$.", 2);
    memcpy(path + 2, s2 + koff + 1, klen - 2);
    path[klen] = '\0';
    if (mjson_find(s, n, path, &val, &vlen) != MJSON_TOK_INVALID) continue;
    if (comma) len += fn(",", 1, userdata);
    len += fn(s2 + koff, klen, userdata);
    len += fn(":", 1, userdata);
    len += fn(s2 + voff, vlen, userdata);
    comma = 1;
  }
  len += fn("}", 1, userdata);
  return len;
 }
 #endif  // MJSON_ENABLE_MERGE
 #if MJSON_ENABLE_PRETTY
 struct prettydata {
  int level;
  int len;
  int prev;
  const char *pad;
  int padlen;
  mjson_print_fn_t fn;
  void *userdata;
 };
 static int pretty_cb(int ev, const char *s, int off, int len, void *ud) {
  struct prettydata *d = (struct prettydata *) ud;
  int i;
  switch (ev) {
    case '{':
    case '[':
      d->level++;
      d->len += d->fn(s + off, len, d->userdata);
      break;
    case '}':
    case ']':
      d->level--;
      if (d->prev != '[' && d->prev != '{' && d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      d->len += d->fn(s + off, len, d->userdata);
      break;
    case ',':
      d->len += d->fn(s + off, len, d->userdata);
      if (d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      break;
    case ':':
      d->len += d->fn(s + off, len, d->userdata);
      if (d->padlen > 0) d->len += d->fn(" ", 1, d->userdata);
      break;
    case MJSON_TOK_KEY:
      if (d->prev == '{' && d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      d->len += d->fn(s + off, len, d->userdata);
      break;
    default:
      if (d->prev == '[' && d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      d->len += d->fn(s + off, len, d->userdata);
      break;
  }
  d->prev = ev;
  return 0;
 }
 int mjson_pretty(const char *s, int n, const char *pad, mjson_print_fn_t fn,
                 void *userdata) {
  struct prettydata d = {0, 0, 0, pad, strlen(pad), fn, userdata};
  if (mjson(s, n, pretty_cb, &d) < 0) return -1;
  return d.len;
 }
 #endif  // MJSON_ENABLE_PRETTY
 #if MJSON_ENABLE_RPC
 struct jsonrpc_ctx jsonrpc_default_context;
 struct jsonrpc_userdata {
  mjson_print_fn_t fn;
  void *fndata;
 };
 int mjson_globmatch(const char *s1, int n1, const char *s2, int n2) {
  int i = 0, j = 0, ni = 0, nj = 0;
  while (i < n1 || j < n2) {
    if (i < n1 && j < n2 && (s1[i] == '?' || s2[j] == s1[i])) {
      i++, j++;
    } else if (i < n1 && (s1[i] == '*' || s1[i] == '#')) {
      ni = i, nj = j + 1, i++;
    } else if (nj > 0 && nj <= n2 && (s1[i - 1] == '#' || s2[j] != '/')) {
      i = ni, j = nj;
    } else {
      return 0;
    }
  }
  return 1;
 }
 static int jsonrpc_printer(const char *buf, int len, void *userdata) {
  struct jsonrpc_userdata *u = (struct jsonrpc_userdata *) userdata;
  return u->fn(buf, len, u->fndata);
 }
 void jsonrpc_return_errorv(struct jsonrpc_request *r, int code,
                           const char *message, const char *data_fmt,
                           va_list ap) {
  if (r->id_len == 0) return;
  mjson_printf(r->fn, r->fndata,
               "{\"id\":%.*s,\"error\":{\"code\":%d,\"message\":%Q", r->id_len,
               r->id, code, message == NULL ? "" : message);
  if (data_fmt != NULL) {
  	mjson_printf(r->fn, r->fndata, ",\"data\":");
    mjson_vprintf(r->fn, r->fndata, data_fmt, ap);
  }
  mjson_printf(r->fn, r->fndata, "}}\n");
 }
 void jsonrpc_return_error(struct jsonrpc_request *r, int code,
                          const char *message, const char *data_fmt, ...) {
  va_list ap;
  va_start(ap, data_fmt);
  jsonrpc_return_errorv(r, code, message, data_fmt, ap);
  va_end(ap);
 }
 void jsonrpc_return_successv(struct jsonrpc_request *r, const char *result_fmt,
                             va_list ap) {
  if (r->id_len == 0) return;
  mjson_printf(r->fn, r->fndata, "{\"id\":%.*s,\"result\":", r->id_len, r->id);
  if (result_fmt != NULL) {
    mjson_vprintf(r->fn, r->fndata, result_fmt, ap);
  } else {
    mjson_printf(r->fn, r->fndata, "%s", "null");
  }
  mjson_printf(r->fn, r->fndata, "}\n");
 }
 void jsonrpc_return_success(struct jsonrpc_request *r, const char *result_fmt,
                            ...) {
  va_list ap;
  va_start(ap, result_fmt);
  jsonrpc_return_successv(r, result_fmt, ap);
  va_end(ap);
 }
 void jsonrpc_ctx_process(struct jsonrpc_ctx *ctx, const char *req, int req_sz,
                         mjson_print_fn_t fn, void *fndata) {
  const char *result = NULL, *error = NULL;
  int result_sz = 0, error_sz = 0;
  struct jsonrpc_method *m = NULL;
  struct jsonrpc_userdata d;
  struct jsonrpc_request r = {req, req_sz,           0,    0,   0, 0, 0,
                              0,   &jsonrpc_printer, NULL, NULL};
  d.fn = fn;
  d.fndata = fndata;
  r.fndata = &d;
  // Is is a response frame?
  mjson_find(req, req_sz, "$.result", &result, &result_sz);
  if (result == NULL) mjson_find(req, req_sz, "$.error", &error, &error_sz);
  if (result_sz > 0 || error_sz > 0) {
    if (ctx->response_cb != NULL) ctx->response_cb(req, req_sz, ctx->userdata);
    return;
  }
  // Method must exist and must be a string
  if (mjson_find(req, req_sz, "$.method", &r.method, &r.method_len) !=
      MJSON_TOK_STRING) {
    mjson_printf(fn, fndata, "{\"error\":{\"code\":-32700,\"message\":%.*Q}}\n",
                 req_sz, req);
    ctx->in_len = 0;
    return;
  }
  // id and params are optional
  mjson_find(req, req_sz, "$.id", &r.id, &r.id_len);
  mjson_find(req, req_sz, "$.params", &r.params, &r.params_len);
  for (m = ctx->methods; m != NULL; m = m->next) {
    if (mjson_globmatch(m->method, m->method_sz, r.method + 1,
                        r.method_len - 2) > 0) {
      if (r.params == NULL) r.params = "";
      r.userdata = m->cbdata;
      m->cb(&r);
      break;
    }
  }
  if (m == NULL) {
    jsonrpc_return_error(&r, JSONRPC_ERROR_NOT_FOUND, "method not found", NULL);
  }
 }
 static int jsonrpc_print_methods(mjson_print_fn_t fn, void *fndata,
                                 va_list *ap) {
  struct jsonrpc_ctx *ctx = va_arg(*ap, struct jsonrpc_ctx *);
  struct jsonrpc_method *m;
  int len = 0;
  for (m = ctx->methods; m != NULL; m = m->next) {
    if (m != ctx->methods) len += mjson_print_buf(fn, fndata, ",", 1);
    len += mjson_print_str(fn, fndata, m->method, strlen(m->method));
  }
  return len;
 }
 static void rpclist(struct jsonrpc_request *r) {
  jsonrpc_return_success(r, "[%M]", jsonrpc_print_methods, r->userdata);
 }
 void jsonrpc_ctx_init(struct jsonrpc_ctx *ctx, mjson_print_fn_t response_cb,
                      void *userdata) {
  ctx->response_cb = response_cb;
  ctx->userdata = userdata;
  jsonrpc_ctx_export(ctx, MJSON_RPC_LIST_NAME, rpclist, ctx);
 }
 void jsonrpc_ctx_process_byte(struct jsonrpc_ctx *ctx, unsigned char ch,
                              mjson_print_fn_t fn, void *p) {
  if (ctx->in_len >= (int) sizeof(ctx->in)) ctx->in_len = 0;  // Overflow
  if (ch == '\n') {  // If new line, parse frame
    if (ctx->in_len > 1) jsonrpc_ctx_process(ctx, ctx->in, ctx->in_len, fn, p);
    ctx->in_len = 0;
  } else {
    ctx->in[ctx->in_len] = ch;  // Append to the buffer
    ctx->in_len++;
  }
 }
 void jsonrpc_init(mjson_print_fn_t response_cb, void *userdata) {
  jsonrpc_ctx_init(&jsonrpc_default_context, response_cb, userdata);
 }
 #endif  // MJSON_ENABLE_RPC
@@ -0,0 +1,220 @@
 // Copyright (c) 2018-2020 Cesanta Software Limited
 // All rights reserved
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 #ifndef MJSON_H
 #define MJSON_H
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifndef MJSON_ENABLE_PRINT
 #define MJSON_ENABLE_PRINT 1
 #endif
 #ifndef MJSON_ENABLE_RPC
 #define MJSON_ENABLE_RPC 1
 #endif
 #ifndef MJSON_ENABLE_BASE64
 #define MJSON_ENABLE_BASE64 1
 #endif
 #ifndef MJSON_ENABLE_MERGE
 #define MJSON_ENABLE_MERGE 0
 #elif MJSON_ENABLE_MERGE
 #define MJSON_ENABLE_NEXT 1
 #endif
 #ifndef MJSON_ENABLE_PRETTY
 #define MJSON_ENABLE_PRETTY 0
 #elif MJSON_ENABLE_PRETTY
 #define MJSON_ENABLE_NEXT 1
 #endif
 #ifndef MJSON_ENABLE_NEXT
 #define MJSON_ENABLE_NEXT 0
 #endif
 #ifndef MJSON_RPC_IN_BUF_SIZE
 #define MJSON_RPC_IN_BUF_SIZE 256
 #endif
 #ifndef MJSON_RPC_LIST_NAME
 #define MJSON_RPC_LIST_NAME "rpc.list"
 #endif
 #ifdef __cplusplus
 extern "C" {
 #endif
 enum {
  MJSON_ERROR_INVALID_INPUT = -1,
  MJSON_ERROR_TOO_DEEP = -2,
 };
 enum mjson_tok {
  MJSON_TOK_INVALID = 0,
  MJSON_TOK_KEY = 1,
  MJSON_TOK_STRING = 11,
  MJSON_TOK_NUMBER = 12,
  MJSON_TOK_TRUE = 13,
  MJSON_TOK_FALSE = 14,
  MJSON_TOK_NULL = 15,
  MJSON_TOK_ARRAY = 91,
  MJSON_TOK_OBJECT = 123,
 };
 #define MJSON_TOK_IS_VALUE(t) ((t) > 10 && (t) < 20)
 typedef int (*mjson_cb_t)(int ev, const char *s, int off, int len, void *ud);
 #ifndef MJSON_MAX_DEPTH
 #define MJSON_MAX_DEPTH 20
 #endif
 int mjson(const char *s, int len, mjson_cb_t cb, void *ud);
 enum mjson_tok mjson_find(const char *s, int len, const char *jp,
                          const char **tokptr, int *toklen);
 int mjson_get_number(const char *s, int len, const char *path, double *v);
 int mjson_get_bool(const char *s, int len, const char *path, int *v);
 int mjson_get_string(const char *s, int len, const char *path, char *to, int n);
 int mjson_get_hex(const char *s, int len, const char *path, char *to, int n);
 #if MJSON_ENABLE_NEXT
 int mjson_next(const char *s, int n, int off, int *koff, int *klen, int *voff,
               int *vlen, int *vtype);
 #endif
 #if MJSON_ENABLE_BASE64
 int mjson_get_base64(const char *s, int len, const char *path, char *to, int n);
 int mjson_base64_dec(const char *src, int n, char *dst, int dlen);
 #endif
 #if MJSON_ENABLE_PRINT
 typedef int (*mjson_print_fn_t)(const char *buf, int len, void *userdata);
 typedef int (*mjson_vprint_fn_t)(mjson_print_fn_t, void *, va_list *);
 struct mjson_fixedbuf {
  char *ptr;
  int size, len;
 };
 int mjson_printf(mjson_print_fn_t, void *, const char *fmt, ...);
 int mjson_vprintf(mjson_print_fn_t, void *, const char *fmt, va_list ap);
 int mjson_print_str(mjson_print_fn_t, void *, const char *s, int len);
 int mjson_print_int(mjson_print_fn_t, void *, int value, int is_signed);
 int mjson_print_long(mjson_print_fn_t, void *, long value, int is_signed);
 int mjson_print_buf(mjson_print_fn_t fn, void *, const char *buf, int len);
 int mjson_print_null(const char *ptr, int len, void *userdata);
 int mjson_print_file(const char *ptr, int len, void *userdata);
 int mjson_print_fixed_buf(const char *ptr, int len, void *userdata);
 int mjson_print_dynamic_buf(const char *ptr, int len, void *userdata);
 #if MJSON_ENABLE_PRETTY
 int mjson_pretty(const char *, int, const char *, mjson_print_fn_t, void *);
 #endif
 #if MJSON_ENABLE_MERGE
 int mjson_merge(const char *, int, const char *, int, mjson_print_fn_t, void *);
 #endif
 #endif  // MJSON_ENABLE_PRINT
 #if MJSON_ENABLE_RPC
 void jsonrpc_init(mjson_print_fn_t, void *userdata);
 int mjson_globmatch(const char *s1, int n1, const char *s2, int n2);
 struct jsonrpc_request {
  const char *frame;    // Points to the whole frame
  int frame_len;        // Frame length
  const char *params;   // Points to the "params" in the request frame
  int params_len;       // Length of the "params"
  const char *id;       // Points to the "id" in the request frame
  int id_len;           // Length of the "id"
  const char *method;   // Points to the "method" in the request frame
  int method_len;       // Length of the "method"
  mjson_print_fn_t fn;  // Printer function
  void *fndata;         // Printer function data
  void *userdata;       // Callback's user data as specified at export time
 };
 struct jsonrpc_method {
  const char *method;
  int method_sz;
  void (*cb)(struct jsonrpc_request *);
  void *cbdata;
  struct jsonrpc_method *next;
 };
 // Main RPC context, stores current request information and a list of
 // exported RPC methods.
 struct jsonrpc_ctx {
  struct jsonrpc_method *methods;
  void *userdata;
  mjson_print_fn_t response_cb;
  int in_len;
  char in[MJSON_RPC_IN_BUF_SIZE];
 };
 // Registers function fn under the given name within the given RPC context
 #define jsonrpc_ctx_export(ctx, name, fn, ud)                                \
  do {                                                                       \
    static struct jsonrpc_method m = {(name), sizeof(name) - 1, (fn), 0, 0}; \
    m.cbdata = (ud);                                                         \
    m.next = (ctx)->methods;                                                 \
    (ctx)->methods = &m;                                                     \
  } while (0)
 void jsonrpc_ctx_init(struct jsonrpc_ctx *ctx, mjson_print_fn_t, void *);
 void jsonrpc_return_error(struct jsonrpc_request *r, int code,
                          const char *message, const char *data_fmt, ...);
 void jsonrpc_return_success(struct jsonrpc_request *r, const char *result_fmt,
                            ...);
 void jsonrpc_ctx_process(struct jsonrpc_ctx *ctx, const char *req, int req_sz,
                         mjson_print_fn_t fn, void *fndata);
 void jsonrpc_ctx_process_byte(struct jsonrpc_ctx *ctx, unsigned char ch,
                              mjson_print_fn_t fn, void *fndata);
 extern struct jsonrpc_ctx jsonrpc_default_context;
 #define jsonrpc_export(name, fn, ud) \
  jsonrpc_ctx_export(&jsonrpc_default_context, (name), (fn), (ud))
 #define jsonrpc_process(buf, len, fn, data) \
  jsonrpc_ctx_process(&jsonrpc_default_context, (buf), (len), (fn), (data))
 #define jsonrpc_process_byte(x, fn, data) \
  jsonrpc_ctx_process_byte(&jsonrpc_default_context, (x), (fn), (data))
 #define JSONRPC_ERROR_INVALID -32700    /* Invalid JSON was received */
 #define JSONRPC_ERROR_NOT_FOUND -32601  /* The method does not exist */
 #define JSONRPC_ERROR_BAD_PARAMS -32602 /* Invalid params passed */
 #define JSONRPC_ERROR_INTERNAL -32603   /* Internal JSON-RPC error */
 #endif  // MJSON_ENABLE_RPC
 #ifdef __cplusplus
 }
 #endif
 #endif  // MJSON_H
@@ -0,0 +1,312 @@
 const {h, render, Component} = preact;
 const html = htm.bind(h);
 class Login extends Component {
  state = {user: '', pass: ''};
  onclick = (app) => {
    const authhdr = 'Basic ' + btoa(this.state.user + ':' + this.state.pass);
    const headers = {Authorization: authhdr};
    return axios.get('/api/login', {headers})
        .then(res => app.setUser(res.data.token))
        .catch(err => alert('Login failed'));
  };
  onpassinput = (ev) => this.setState({pass: ev.target.value});
  onuserinput = (ev) => this.setState({user: ev.target.value});
  render({app}, {user, pass, signup}) {
    return html`
      <div class='mx-auto bg-light rounded border my-5' style='max-width: 480px;'>
        <div class='form p-5 rounded form-sm'>
          <h4 class="text-muted mb-4">Login </h4>
          <input type='email' placeholder='Email' class='my-2 form-control'
            oninput=${this.onuserinput} value=${user} />
          <input type="password" placeholder="Password" class="my-2 form-control"
            oninput=${this.onpassinput} value=${pass}
            onchange=${ev => this.onclick(app)} />
          <div class="mb-4">
            <button class="btn btn-info btn-block" 
    disabled=${!user || !pass} onclick="${ev => this.onclick(app)}"
            > Login </button>
          </div>
          <div class="text-muted small">
            Valid logins: admin:admin, user1:pass1, user2:pass2
          </div>
        </div>
      </div>
    `
  }
 };
 class Dropdown extends Component {
  state = {show: false};
  render(props, state) {
    const onclick = x => this.setState({show: x});
    const show = state.show ? 'show' : '';
    return html`
      <div class="dropdown autoexpand ${props.cls}">
        <div type="buttonx" onclick=${() => onclick(!state.show)}
          class="dropdown-toggle my-0 ${props.bcls}"
          data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">
          ${props.title}
        </div>
        <div onclick=${() => onclick(false)} style=${props.dstyle}
          class="dropdown-menu ${props.dcls} ${show}">
          ${props.children}
        </div>
      </div>`;
  }
 };
 const NavLink = ({href, title, url}) => html`<a class="nav-item nav-link
    ${url == href ? 'active' : ''}"
    target=${href.match(/^http/) ? '_blank' : ''}
    href="${href.match(/^http/) ? '' : '#'}${href}">${title}</a>`;
 class Header extends Component {
  state = {expanded: false};
  ontoggle = () => this.setState({expanded: !this.state.expanded});
  render(props, state) {
    const u = props.app.state.user || {};
    return html`
      <nav class="navbar navbar-expand-md navbar-dark bg-dark">
        <a class="navbar-brand" href="#">
          <img src="images/logo.png" width="26" height="26" alt="" class="mr-2" />
          MyProduct
        </a>
          <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNav" aria-controls="navbarNav" aria-expanded="false" aria-label="Toggle navigation" 
            onclick=${() => this.ontoggle()} >
          <span class="navbar-toggler-icon"></span>
        </button>
        <div class="navbar-collapse ${state.expanded ? '' : 'collapse'}"
            id="navbarNav">
          <div class="nav navbar-nav mr-auto">
            <${NavLink} href="/" title="Dashboard" url=${props.url} />
            <${NavLink} href="/logs" title="Logs" url=${props.url} />
          </div>
        </div>
        <form class="form-inline">
          <${Dropdown} title="${u.user}" cls="mr-2" 
          bcls="btn btn-sm btn-outline-light pointer" dcls="m-0 dropdown-menu-right">
            <div onclick=${() => props.app.setUser('')}
              class="dropdown-item small pointer text-center">logout</div>
          </${Dropdown}>
          <img src="images/user.png" class="rounded-circle nav-item mr-2" width="30" />
        </form>
      </nav>
    `
  }
 };
 const Info = () => html`<div class="alert alert-secondary my-3">
  This dashboard shows values kept in server memory. Many clients
  can open this page. As soon as any client changes any value,
  all clients update automatically.
  The JS code that watches state changes, reconnects on network failures.
  That means if server restarts, dashboard on all connected clients
  refresh automatically.
  You can use <code>curl</code> command-line utility:
  <br/><code>curl localhost:8000/api/config/get</code>
  <br/><code>curl localhost:8000/api/config/watch</code>
  <br/><code>curl localhost:8000/api/config/set -d '{"a":123}'</code>
  <br/><span class="badge badge-danger">NOTE:</span> administrators
  can change settings values, whilst users cannot.
 </div>`;
 class DashVideo extends Component {
  render(props, state) {
    const onclick = ev => axios.post(
        '/api/config/set', {value1: +state.value1, value2: state.value2});
    // alert(JSON.stringify(state));
    return html`<div id="form">
      <div><b>Change values</b></div>
      <table>
        <tr><td>Value 1 (number):</td><td><input value=${state.value1}
          onInput=${linkState(this, 'value1')} /></td></tr>
        <tr><td>Value 2 (string):</td><td><input value=${state.value2}
            onInput=${linkState(this, 'value2')}/></td></tr>
        <tr><td></td>
          <td><button onClick=${onclick}>Save values</button></td></tr>
      </table>
    </div>`
  }
 };
 class DashForm extends Component {
  render(props, state) {
    const onclick = ev => axios.post(
        '/api/config/set', {value1: +state.value1, value2: state.value2});
    // alert(JSON.stringify(state));
    return html`<div id="form">
      <div><b>Change values</b></div>
      <table>
        <tr><td>Value 1 (number):</td><td><input class="form-control form-control-sm"
          value=${state.value1}
          onInput=${linkState(this, 'value1')} /></td></tr>
        <tr><td>Value 2 (string):</td><td><input class="form-control form-control-sm"
            value=${state.value2}
            onInput=${linkState(this, 'value2')}/></td></tr>
        <tr><td></td>
          <td><button class="btn btn-primary btn-block"
            onClick=${onclick}>Save values</button></td></tr>
      </table>
    </div>`
  }
 };
 class DashSettings extends Component {
  state = {value1: null, value2: null};
  componentDidMount() {
    axios.get('/api/config/get')
        .then(r => this.setState(r.data))
        .catch(e => console.log(e));
    var self = this;
    var f = function(reader) {
      return reader.read().then(function(result) {
        var data = String.fromCharCode.apply(null, result.value);
        self.setState(JSON.parse(data));
        // console.log(JSON.parse(data));
        if (!result.done) return f(reader);
      });
    };
    fetch('/api/config/watch')
        .then(r => r.body.getReader())
        .then(f)
        .catch(e => setTimeout(x => self.componentDidMount(), 1000));
  }
  render(props, state) {
    return html
    `<div id="dashboard" style="display: flex; justify-content: flex-evenly;">
        <div style="width:50%;text-align:center;">Value 1 (number):
          <div style="font-size:140%;"><b>${state.value1}</b></div></div>
        <div style="width:50%;text-align:center;">Value 2 (string):
          <div style="font-size:140%;"><b>${state.value2}</b></div></div>
    </div>`
  }
 };
 class AdminDashboard extends Component {
  render(props, state) {
    return html`<div class="container-fluid">
      <${Info} />
      <div class="card-deck">
        <div class="card">
          <div class="card-header">Settings</div>
          <div class="card-body"><${DashSettings} /></div>
        </div>
        <div class="card">
          <div class="card-header">Video stream</div>
          <div class="card-body"><img src="/api/video1" class="mw-100" /></div>
        </div>
        <div class="card">
          <div class="card-header">Change settings</div>
          <div class="card-body"><${DashForm} /></div>
        </div>
      </div>
    </div>`
  }
 }
 class UserDashboard extends Component {
  render(props, state) {
    return html`<div class="container-fluid">
      <${Info} />
      <div class="card-deck">
        <div class="card">
          <div class="card-header">Settings</div>
          <div class="card-body"><${DashSettings} /></div>
        </div>
        <div class="card">
          <div class="card-header">Video stream</div>
          <div class="card-body"><img src="/api/video1" class="mw-100" /></div>
        </div>
      </div>
    </div>`
  }
 }
 class Logs extends Component {
  state = {live: '', static: ''};
  componentDidMount() {
    var self = this;
    var f = function(r) {
      return r.read().then(function(result) {
        var data = String.fromCharCode.apply(null, result.value);
        var live = self.state.live + data;
        self.setState({live});   // Append live log
        if (!result.done) f(r);  // Read next chunk
      });
    };
    fetch('/api/log/static')
        .then(r => r.text())
        .then(r => {
          self.setState({static: r});
        })
        .then(r => fetch('/api/log/live'))
        .then(r => r.body.getReader())
        .then(f);
  }
  render(props, state) {
    return html`<div class="container-fluid">
      <div class="alert alert-secondary my-3">
        A div below shows file log.txt, which is produced by the server.
        The server appends a new log message to that file every second,
        and a div below also shows that, implementing a "live log" feature.
        JS code on this page first fetches /api/log/static that returns
        log.txt contents, then fetches /api/log/live that does not return,
        but feeds chunks of data as they arrive (live log).
        <br/><br/>
        You can also use <code>curl</code> command-line utility to see
        live logs:
        <br/><code>curl localhost:8000/api/log/live</code>
      </div>
      <div class="card-deck">
        <div class="card">
          <div class="card-header">Static</div>
          <div class="card-body"><pre class="log">${state.static}</pre></div>
        </div>
        <div class="card">
          <div class="card-header">Live</div>
          <div class="card-body"><pre class="log">${state.live}</pre></div>
        </div>
      </div>
    </div>`
  }
 }
 class App extends Component {
  state = {user: null, url: '/'};
  setUser(token) {
    const maxAge = token ? 86400 : 0;
    document.cookie = `access_token=${token};path=/;max-age=${maxAge}`;
    // this.setState({token});
    return axios.get('/api/login')
        .then(res => this.setState({user: res.data}))
        .catch(err => this.setState({user: {}}));
  }
  componentDidMount() {
    const getCookie = name => {
      var v = document.cookie.match('(^|;) ?' + name + '=([^;]*)(;|$)');
      return v ? v[2] : '';
    };
    this.setUser(getCookie('access_token'));  // Move from state1 to 2 or 3
  }
  render(props, state) {
    // We have three states:
    // 1. Beginning. We don't know if we have a valid auth token or not
    // 2. We sent an /api/login request, and failed to login
    // 3. We sent an /api/login request, and succeeded to login
    if (!state.user) return '';                          // State 1
    if (!state.user.user) return h(Login, {app: this});  // State 2
    return h(                                            // State 3
        'div', {}, h(Header, {url: state.url, app: this}),
        h(preactRouter.Router, {
          history: History.createHashHistory(),
          onChange: ev => this.setState({url: ev.url}),
        },
          h(state.user.user == 'admin' ? AdminDashboard : UserDashboard,
            {default: true, app: this}),
          h(Logs, {path: 'logs', app: this})));
  }
 };
 window.onload = () => render(h(App), document.body);
@@ -0,0 +1,3 @@
 /* axios v0.21.1 | (c) 2020 by Matt Zabriskie */
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           obj[path[i]] = v;
           component.setState(state);
         });
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@@ -0,0 +1,7 @@
 html, body { margin: 0; padding: 0; height: 100%; }
 select, input, label::before, textarea { outline: none; box-shadow:none !important; border: 1px solid #ccc !important; }
 .btn:focus,.btn:active:focus,.btn.active:focus,
 .btn.focus,.btn:active.focus,.btn.active.focus { outline: none; box-shadow:none !important; }
 .dropdown.autoexpand:hover>.dropdown-menu { display: block; }
 .pointer { cursor: pointer; }
 .log { max-height: 10em; overflow: auto; height: 100%; }
@@ -1,2 +0,0 @@
 PROG = server
 include ../examples.mk
@@ -1,43 +0,0 @@
 // Copyright (c) 2015 Cesanta Software Limited
 // All rights reserved
 #include "mongoose.h"
 static const char *s_http_port = "8000";
 static struct mg_serve_http_opts s_http_server_opts;
 static void ev_handler(struct mg_connection *nc, int ev, void *p) {
  if (ev == MG_EV_HTTP_REQUEST) {
    mg_serve_http(nc, p, s_http_server_opts);  // Serves static content
  }
 }
 int main(void) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  cs_stat_t st;
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  if (nc == NULL) {
    fprintf(stderr, "Cannot bind to %s\n", s_http_port);
    exit(1);
  }
  // Set up HTTP server parameters
  mg_set_protocol_http_websocket(nc);
  s_http_server_opts.document_root = "web_root";  // Set up web root directory
  if (mg_stat(s_http_server_opts.document_root, &st) != 0) {
    fprintf(stderr, "%s", "Cannot find web_root directory, exiting\n");
    exit(1);
  }
  printf("Starting web server on port %s\n", s_http_port);
  for (;;) {
    mg_mgr_poll(&mgr, 1000);
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,39 +0,0 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="utf-8" />
  <title>Connected device demo</title>
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <link rel="stylesheet" type="text/css" href="style.css">
 </head>
 <body>
  <div class="content">
    <img src="logo.png" style="float:right; height: 50px; border-radius: 3px;">
    <h1>Connected device demo - static content only</h1>
    <p>
      This page shows initial steps on how to make a device connected.
      Mongoose serves static content from the <code>web_root</code>
      directory. Images, CSS, HTML, JavaScript files could be dropped into the
      <code>web_root</code> directory - and they'll be served happily
      by Mongoose.
    </p>
    <p>
      Below is a placeholder for the
      settings section, and a real-time dashboard, which will be
      implemented in the following examples.
      Both settings section, and a dashboard section, could be organised
      differently on this UI - for example, in different tabs. But, to
      make the demonstration clearer, we show everything on one page.
    </p>
    <h1>Settings section</h1>
    <p>Nothing here yet</p>
    <h1>Dashboard section</h1>
    <p>Nothing here yet</p>
  </div>
 </body>
 </html>
@@ -1,31 +0,0 @@
 * {
  outline: none;
 }
 body {
  background-color: #36c;
  margin: 0;
  padding: 0;
  font: 16px/1.4 Helvetica, Arial, sans-serif;
 }
 div.content {
  width: 800px;
  margin: 1em auto;
  padding: 2em;
  background-color: #fff;
  border-radius: 1em;
 }
 code {
  background: #f0f0f0;
  padding: 0 0.3em;
  color: #396;
  border-radius: 0.3em;
 }
 a:link, a:visited {
  color: #69c;
  text-decoration: none;
 }
@@ -1,2 +0,0 @@
 PROG = server
 include ../examples.mk
@@ -1,81 +0,0 @@
 // Copyright (c) 2015 Cesanta Software Limited
 // All rights reserved
 #include "mongoose.h"
 struct device_settings {
  char setting1[100];
  char setting2[100];
 };
 static const char *s_http_port = "8000";
 static struct mg_serve_http_opts s_http_server_opts;
 static struct device_settings s_settings = { "value1", "value2" };
 static void handle_save(struct mg_connection *nc, struct http_message *hm) {
  // Get form variables and store settings values
  mg_get_http_var(&hm->body, "setting1", s_settings.setting1,
                  sizeof(s_settings.setting1));
  mg_get_http_var(&hm->body, "setting2", s_settings.setting2,
                  sizeof(s_settings.setting2));
  // Send response
  mg_printf(nc, "%s", "HTTP/1.1 302 OK\r\nLocation: /\r\n\r\n");
 }
 static void handle_ssi_call(struct mg_connection *nc, const char *param) {
  if (strcmp(param, "setting1") == 0) {
    mg_printf_html_escape(nc, "%s", s_settings.setting1);
  } else if (strcmp(param, "setting2") == 0) {
    mg_printf_html_escape(nc, "%s", s_settings.setting2);
  }
 }
 static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  struct http_message *hm = (struct http_message *) ev_data;
  switch (ev) {
    case MG_EV_HTTP_REQUEST:
      if (mg_vcmp(&hm->uri, "/save") == 0) {
        handle_save(nc, hm);
      } else {
        mg_serve_http(nc, hm, s_http_server_opts);  // Serve static content
      }
      break;
    case MG_EV_SSI_CALL:
      handle_ssi_call(nc, ev_data);
      break;
    default:
      break;
  }
 }
 int main(void) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  cs_stat_t st;
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  if (nc == NULL) {
    fprintf(stderr, "Cannot bind to %s\n", s_http_port);
    exit(1);
  }
  // Set up HTTP server parameters
  mg_set_protocol_http_websocket(nc);
  s_http_server_opts.document_root = "web_root";  // Set up web root directory
  if (mg_stat(s_http_server_opts.document_root, &st) != 0) {
    fprintf(stderr, "%s", "Cannot find web_root directory, exiting\n");
    exit(1);
  }
  printf("Starting web server on port %s\n", s_http_port);
  for (;;) {
    mg_mgr_poll(&mgr, 1000);
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,46 +0,0 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="utf-8" />
  <title>Connected device demo</title>
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <link rel="stylesheet" type="text/css" href="style.css">
 </head>
 <body>
  <div class="content">
    <img src="logo.png" style="float:right; height: 50px; border-radius: 3px;">
    <h1>Connected device demo - settings section</h1>
    <p>
      This page is one of the series of examples that show how to make
      devices connected with Mongoose. Here, we create a settings section
      that expose some internal device variables, and allow user to change
      them. They could be some stored in a database, in a file, or in
      firmware RAM. In this example, we store them in RAM, and use two
      variables, one integer and one string. We use SSI
      <code>&lt;!--#call parameter_name --&gt;</code> directive to fetch
      variable values from Mongoose.
    </p>
    <h1>Settings section</h1>
    <form method="POST" action="/save">
      <fieldset>
        <legend>Device settings</legend>
        <label>Setting 1:</label> <input type="text"
          name="setting1" value="<!--#call setting1 -->" >
        <label>Setting 2:</label> <input type="text"
          name="setting2" value="<!--#call setting2 -->" >
        <div>
          <button type="submit">Save Settings</button>
        </div>
      </fieldset>
    </form>
    <h1>Dashboard section</h1>
    <p>Nothing here yet</p>
  </div>
 </body>
 </html>
@@ -1,67 +0,0 @@
 * {
  outline: none;
 }
 body {
  background: #36c;
  color: #555;
  margin: 0;
  padding: 0;
  font: 16px/1.4 Helvetica, Arial, sans-serif;
 }
 div.content {
  width: 800px;
  margin: 1em auto;
  padding: 2em;
  background-color: #fff;
  border-radius: 1em;
 }
 fieldset {
  border: 1px solid #ccc;
  padding: 1em;
 }
 fieldset legend {
  font-style: italic;
  color: silver;
 }
 fieldset label {
  text-align: right;
  padding: 0 1em;
 }
 input[type=text] {
  font-size: 100%;
  padding: 0.2em;
  border: 1px solid #ccc;
 }
 button {
  color: #666;
  background: #eee;
  border: 1px solid #ccc;
  padding: 0.2em 2em;
  font-size: 100%;
  cursor: pointer;
  margin-top: 1em;
 }
 button:hover {
  background: #ccc;
 }
 code {
  background: #f0f0f0;
  padding: 0 0.3em;
  color: #396;
  border-radius: 0.3em;
 }
 a:link, a:visited {
  color: #69c;
  text-decoration: none;
 }
@@ -1,2 +0,0 @@
 PROG = server
 include ../examples.mk
@@ -1,98 +0,0 @@
 // Copyright (c) 2015 Cesanta Software Limited
 // All rights reserved
 #include "mongoose.h"
 struct device_settings {
  char setting1[100];
  char setting2[100];
 };
 static const char *s_http_port = "8000";
 static struct mg_serve_http_opts s_http_server_opts;
 static struct device_settings s_settings = { "value1", "value2" };
 static void handle_save(struct mg_connection *nc, struct http_message *hm) {
  // Get form variables and store settings values
  mg_get_http_var(&hm->body, "setting1", s_settings.setting1,
                  sizeof(s_settings.setting1));
  mg_get_http_var(&hm->body, "setting2", s_settings.setting2,
                  sizeof(s_settings.setting2));
  // Send response
  mg_printf(nc, "%s", "HTTP/1.1 302 OK\r\nLocation: /\r\n\r\n");
 }
 static void handle_get_cpu_usage(struct mg_connection *nc) {
  // Generate random value, as an example of changing CPU usage
  // Getting real CPU usage depends on the OS.
  int cpu_usage = (double) rand() / RAND_MAX * 100.0;
  // Use chunked encoding in order to avoid calculating Content-Length
  mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
  // Output JSON object which holds CPU usage data
  mg_printf_http_chunk(nc, "{ \"result\": %d }", cpu_usage);
  // Send empty chunk, the end of response
  mg_send_http_chunk(nc, "", 0);
 }
 static void handle_ssi_call(struct mg_connection *nc, const char *param) {
  if (strcmp(param, "setting1") == 0) {
    mg_printf_html_escape(nc, "%s", s_settings.setting1);
  } else if (strcmp(param, "setting2") == 0) {
    mg_printf_html_escape(nc, "%s", s_settings.setting2);
  }
 }
 static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  struct http_message *hm = (struct http_message *) ev_data;
  switch (ev) {
    case MG_EV_HTTP_REQUEST:
      if (mg_vcmp(&hm->uri, "/save") == 0) {
        handle_save(nc, hm);
      } else if (mg_vcmp(&hm->uri, "/get_cpu_usage") == 0) {
        handle_get_cpu_usage(nc);
      } else {
        mg_serve_http(nc, hm, s_http_server_opts);  // Serve static content
      }
      break;
    case MG_EV_SSI_CALL:
      handle_ssi_call(nc, ev_data);
      break;
    default:
      break;
  }
 }
 int main(void) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  cs_stat_t st;
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  if (nc == NULL) {
    fprintf(stderr, "Cannot bind to %s\n", s_http_port);
    exit(1);
  }
  // Set up HTTP server parameters
  mg_set_protocol_http_websocket(nc);
  s_http_server_opts.document_root = "web_root";  // Set up web root directory
  if (mg_stat(s_http_server_opts.document_root, &st) != 0) {
    fprintf(stderr, "%s", "Cannot find web_root directory, exiting\n");
    exit(1);
  }
  printf("Starting web server on port %s\n", s_http_port);
  for (;;) {
    mg_mgr_poll(&mgr, 1000);
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,44 +0,0 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="utf-8" />
  <title>Connected device demo</title>
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <link rel="stylesheet" type="text/css" href="style.css">
  <script type="text/javascript" src="jquery-1.11.3.min.js"></script>
  <script type="text/javascript" src="main.js"></script>
 </head>
 <body>
  <div class="content">
    <img src="logo.png" style="float:right; height: 50px; border-radius: 3px;">
    <h1>Connected device demo - RESTful call</h1>
    <p>
      This page is one of the series of examples that show how to make
      devices connected with Mongoose. Here we add a RESTful call
      to the Mongoose to show CPU usage stats on a dashboard.
      RESTful call is done using Jquery's <code>ajax</code> call.
    </p>
    <h1>Settings section</h1>
    <form method="POST" action="/save">
      <fieldset>
        <legend>Device settings</legend>
        <label>Setting 1:</label> <input type="text"
          name="setting1" value="<!--#call setting1 -->" >
        <label>Setting 2:</label> <input type="text"
          name="setting2" value="<!--#call setting2 -->" >
        <div>
          <button type="submit">Save Settings</button>
        </div>
      </fieldset>
    </form>
    <h1>Dashboard section</h1>
    <label>CPU usage:</label> <span id="cpu_usage">&nbsp;</span>
  </div>
 </body>
 </html>
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@@ -1,12 +0,0 @@
 $(document).ready(function() {
  // Start 1-second timer to call RESTful endpoint
  setInterval(function() {
    $.ajax({
      url: '/get_cpu_usage',
      dataType: 'json',
      success: function(json) {
        $('#cpu_usage').text(json.result + '% ');
      }
    });
  }, 1000);
 });
@@ -1,66 +0,0 @@
 * {
  outline: none;
 }
 body {
  background: #36c;
  color: #555;
  margin: 0;
  padding: 0;
  font: 16px/1.4 Helvetica, Arial, sans-serif;
 }
 div.content {
  width: 800px;
  margin: 1em auto;
  padding: 2em;
  background-color: #fff;
  border-radius: 1em;
 }
 fieldset {
  border: 1px solid #ccc;
  padding: 1em;
 }
 fieldset legend {
  font-style: italic;
  color: silver;
 }
 fieldset label {
  text-align: right;
  padding: 0 1em;
 }
 input[type=text] {
  font-size: 100%;
  padding: 0.2em;
  border: 1px solid #ccc;
 }
 button {
  color: #666;
  background: #eee;
  border: 1px solid #ccc;
  padding: 0.2em 2em;
  font-size: 100%;
  cursor: pointer;
  margin-top: 1em;
 }
 button:hover {
  background: #ccc;
 }
 code {
  background: #f0f0f0;
  padding: 0 0.3em;
  color: #396;
  border-radius: 0.3em;
 }
 a:link, a:visited {
  color: #69c;
  text-decoration: none;
 }
@@ -1,2 +0,0 @@
 PROG = server
 include ../examples.mk
@@ -1,115 +0,0 @@
 // Copyright (c) 2015 Cesanta Software Limited
 // All rights reserved
 #include "mongoose.h"
 struct device_settings {
  char setting1[100];
  char setting2[100];
 };
 static const char *s_http_port = "8000";
 static struct mg_serve_http_opts s_http_server_opts;
 static struct device_settings s_settings = { "value1", "value2" };
 static void handle_save(struct mg_connection *nc, struct http_message *hm) {
  // Get form variables and store settings values
  mg_get_http_var(&hm->body, "setting1", s_settings.setting1,
                  sizeof(s_settings.setting1));
  mg_get_http_var(&hm->body, "setting2", s_settings.setting2,
                  sizeof(s_settings.setting2));
  // Send response
  mg_printf(nc, "%s", "HTTP/1.1 302 OK\r\nLocation: /\r\n\r\n");
 }
 static void handle_get_cpu_usage(struct mg_connection *nc) {
  // Generate random value, as an example of changing CPU usage
  // Getting real CPU usage depends on the OS.
  int cpu_usage = (double) rand() / RAND_MAX * 100.0;
  // Use chunked encoding in order to avoid calculating Content-Length
  mg_printf(nc, "%s", "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
  // Output JSON object which holds CPU usage data
  mg_printf_http_chunk(nc, "{ \"result\": %d }", cpu_usage);
  // Send empty chunk, the end of response
  mg_send_http_chunk(nc, "", 0);
 }
 static void handle_ssi_call(struct mg_connection *nc, const char *param) {
  if (strcmp(param, "setting1") == 0) {
    mg_printf_html_escape(nc, "%s", s_settings.setting1);
  } else if (strcmp(param, "setting2") == 0) {
    mg_printf_html_escape(nc, "%s", s_settings.setting2);
  }
 }
 static void ev_handler(struct mg_connection *nc, int ev, void *ev_data) {
  struct http_message *hm = (struct http_message *) ev_data;
  switch (ev) {
    case MG_EV_HTTP_REQUEST:
      if (mg_vcmp(&hm->uri, "/save") == 0) {
        handle_save(nc, hm);
      } else if (mg_vcmp(&hm->uri, "/get_cpu_usage") == 0) {
        handle_get_cpu_usage(nc);
      } else {
        mg_serve_http(nc, hm, s_http_server_opts);  // Serve static content
      }
      break;
    case MG_EV_SSI_CALL:
      handle_ssi_call(nc, ev_data);
      break;
    default:
      break;
  }
 }
 static void push_data_to_all_websocket_connections(struct mg_mgr *m) {
  struct mg_connection *c;
  int memory_usage = (double) rand() / RAND_MAX * 100.0;
  for (c = mg_next(m, NULL); c != NULL; c = mg_next(m, c)) {
    if (c->flags & MG_F_IS_WEBSOCKET) {
      mg_printf_websocket_frame(c, WEBSOCKET_OP_TEXT, "%d", memory_usage);
    }
  }
 }
 int main(void) {
  struct mg_mgr mgr;
  struct mg_connection *nc;
  cs_stat_t st;
  mg_mgr_init(&mgr, NULL);
  nc = mg_bind(&mgr, s_http_port, ev_handler);
  if (nc == NULL) {
    fprintf(stderr, "Cannot bind to %s\n", s_http_port);
    exit(1);
  }
  // Set up HTTP server parameters
  mg_set_protocol_http_websocket(nc);
  s_http_server_opts.document_root = "web_root";  // Set up web root directory
  if (mg_stat(s_http_server_opts.document_root, &st) != 0) {
    fprintf(stderr, "%s", "Cannot find web_root directory, exiting\n");
    exit(1);
  }
  printf("Starting web server on port %s\n", s_http_port);
  for (;;) {
    static time_t last_time;
    time_t now = time(NULL);
    mg_mgr_poll(&mgr, 1000);
    if (now - last_time > 0) {
      push_data_to_all_websocket_connections(&mgr);
      last_time = now;
    }
  }
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -1,46 +0,0 @@
 <!DOCTYPE html>
 <html lang="en">
 <head>
  <meta charset="utf-8" />
  <title>Connected device demo</title>
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <link rel="stylesheet" type="text/css" href="style.css">
  <script type="text/javascript" src="jquery-1.11.3.min.js"></script>
  <script src="jquery.flot.min.js"></script>
  <script src="jquery.flot.time.js"></script>
  <script type="text/javascript" src="main.js"></script>
 </head>
 <body>
  <div class="content">
    <img src="logo.png" style="float:right; height: 50px; border-radius: 3px;">
    <h1>Connected device demo - Websocket push</h1>
    <p>
      This page is one of the series of examples that show how to make
      devices connected with Mongoose. Here we add a real-time Websocket
      server push, and update dashboard graph as data arrives.
    </p>
    <h1>Settings section</h1>
    <form method="POST" action="/save">
      <fieldset>
        <legend>Device settings</legend>
        <label>Setting 1:</label> <input type="text"
          name="setting1" value="<!--#call setting1 -->" >
        <label>Setting 2:</label> <input type="text"
          name="setting2" value="<!--#call setting2 -->" >
        <div>
          <button type="submit">Save Settings</button>
        </div>
      </fieldset>
    </form>
    <h1>Dashboard section</h1>
    <label>CPU usage:</label> <span id="cpu_usage">&nbsp;</span>
    <div id="graphs"></div>
  </div>
 </body>
 </html>
@@ -1,5 +0,0 @@
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x=box.left-plotOffset.left+(axis.position=="left"?box.width:0)}if(!axis.innermost){ctx.strokeStyle=axis.options.color;ctx.beginPath();xoff=yoff=0;if(axis.direction=="x")xoff=plotWidth+1;else yoff=plotHeight+1;if(ctx.lineWidth==1){if(axis.direction=="x"){y=Math.floor(y)+.5}else{x=Math.floor(x)+.5}}ctx.moveTo(x,y);ctx.lineTo(x+xoff,y+yoff);ctx.stroke()}ctx.strokeStyle=axis.options.tickColor;ctx.beginPath();for(i=0;i<axis.ticks.length;++i){var v=axis.ticks[i].v;xoff=yoff=0;if(isNaN(v)||v<axis.min||v>axis.max||t=="full"&&(typeof bw=="object"&&bw[axis.position]>0||bw>0)&&(v==axis.min||v==axis.max))continue;if(axis.direction=="x"){x=axis.p2c(v);yoff=t=="full"?-plotHeight:t;if(axis.position=="top")yoff=-yoff}else{y=axis.p2c(v);xoff=t=="full"?-plotWidth:t;if(axis.position=="left")xoff=-xoff}if(ctx.lineWidth==1){if(axis.direction=="x")x=Math.floor(x)+.5;else y=Math.floor(y)+.5}ctx.moveTo(x,y);ctx.lineTo(x+xoff,y+yoff)}ctx.stroke()}if(bw){bc=options.grid.borderColor;if(typeof bw=="object"||typeof bc=="object"){if(typeof bw!=="object"){bw={top:bw,right:bw,bottom:bw,left:bw}}if(typeof bc!=="object"){bc={top:bc,right:bc,bottom:bc,left:bc}}if(bw.top>0){ctx.strokeStyle=bc.top;ctx.lineWidth=bw.top;ctx.beginPath();ctx.moveTo(0-bw.left,0-bw.top/2);ctx.lineTo(plotWidth,0-bw.top/2);ctx.stroke()}if(bw.right>0){ctx.strokeStyle=bc.right;ctx.lineWidth=bw.right;ctx.beginPath();ctx.moveTo(plotWidth+bw.right/2,0-bw.top);ctx.lineTo(plotWidth+bw.right/2,plotHeight);ctx.stroke()}if(bw.bottom>0){ctx.strokeStyle=bc.bottom;ctx.lineWidth=bw.bottom;ctx.beginPath();ctx.moveTo(plotWidth+bw.right,plotHeight+bw.bottom/2);ctx.lineTo(0,plotHeight+bw.bottom/2);ctx.stroke()}if(bw.left>0){ctx.strokeStyle=bc.left;ctx.lineWidth=bw.left;ctx.beginPath();ctx.moveTo(0-bw.left/2,plotHeight+bw.bottom);ctx.lineTo(0-bw.left/2,0);ctx.stroke()}}else{ctx.lineWidth=bw;ctx.strokeStyle=options.grid.borderColor;ctx.strokeRect(-bw/2,-bw/2,plotWidth+bw,plotHeight+bw)}}ctx.restore()}function drawAxisLabels(){$.each(allAxes(),function(_,axis){var box=axis.box,legacyStyles=axis.direction+"Axis "+axis.direction+axis.n+"Axis",layer="flot-"+axis.direction+"-axis flot-"+axis.direction+axis.n+"-axis "+legacyStyles,font=axis.options.font||"flot-tick-label tickLabel",tick,x,y,halign,valign;surface.removeText(layer);if(!axis.show||axis.ticks.length==0)return;for(var i=0;i<axis.ticks.length;++i){tick=axis.ticks[i];if(!tick.label||tick.v<axis.min||tick.v>axis.max)continue;if(axis.direction=="x"){halign="center";x=plotOffset.left+axis.p2c(tick.v);if(axis.position=="bottom"){y=box.top+box.padding}else{y=box.top+box.height-box.padding;valign="bottom"}}else{valign="middle";y=plotOffset.top+axis.p2c(tick.v);if(axis.position=="left"){x=box.left+box.width-box.padding;halign="right"}else{x=box.left+box.padding}}surface.addText(layer,x,y,tick.label,font,null,null,halign,valign)}})}function drawSeries(series){if(series.lines.show)drawSeriesLines(series);if(series.bars.show)drawSeriesBars(series);if(series.points.show)drawSeriesPoints(series)}function drawSeriesLines(series){function plotLine(datapoints,xoffset,yoffset,axisx,axisy){var points=datapoints.points,ps=datapoints.pointsize,prevx=null,prevy=null;ctx.beginPath();for(var i=ps;i<points.length;i+=ps){var x1=points[i-ps],y1=points[i-ps+1],x2=points[i],y2=points[i+1];if(x1==null||x2==null)continue;if(y1<=y2&&y1<axisy.min){if(y2<axLine truncated
@@ -1,432 +0,0 @@
 /* Pretty handling of time axes.
 Copyright (c) 2007-2014 IOLA and Ole Laursen.
 Licensed under the MIT license.
 Set axis.mode to "time" to enable. See the section "Time series data" in
 API.txt for details.
 */
 (function($) {
 	var options = {
 		xaxis: {
 			timezone: null,		// "browser" for local to the client or timezone for timezone-js
 			timeformat: null,	// format string to use
 			twelveHourClock: false,	// 12 or 24 time in time mode
 			monthNames: null	// list of names of months
 		}
 	};
 	// round to nearby lower multiple of base
 	function floorInBase(n, base) {
 		return base * Math.floor(n / base);
 	}
 	// Returns a string with the date d formatted according to fmt.
 	// A subset of the Open Group's strftime format is supported.
 	function formatDate(d, fmt, monthNames, dayNames) {
 		if (typeof d.strftime == "function") {
 			return d.strftime(fmt);
 		}
 		var leftPad = function(n, pad) {
 			n = "" + n;
 			pad = "" + (pad == null ? "0" : pad);
 			return n.length == 1 ? pad + n : n;
 		};
 		var r = [];
 		var escape = false;
 		var hours = d.getHours();
 		var isAM = hours < 12;
 		if (monthNames == null) {
 			monthNames = ["Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"];
 		}
 		if (dayNames == null) {
 			dayNames = ["Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"];
 		}
 		var hours12;
 		if (hours > 12) {
 			hours12 = hours - 12;
 		} else if (hours == 0) {
 			hours12 = 12;
 		} else {
 			hours12 = hours;
 		}
 		for (var i = 0; i < fmt.length; ++i) {
 			var c = fmt.charAt(i);
 			if (escape) {
 				switch (c) {
 					case 'a': c = "" + dayNames[d.getDay()]; break;
 					case 'b': c = "" + monthNames[d.getMonth()]; break;
 					case 'd': c = leftPad(d.getDate()); break;
 					case 'e': c = leftPad(d.getDate(), " "); break;
 					case 'h':	// For back-compat with 0.7; remove in 1.0
 					case 'H': c = leftPad(hours); break;
 					case 'I': c = leftPad(hours12); break;
 					case 'l': c = leftPad(hours12, " "); break;
 					case 'm': c = leftPad(d.getMonth() + 1); break;
 					case 'M': c = leftPad(d.getMinutes()); break;
 					// quarters not in Open Group's strftime specification
 					case 'q':
 						c = "" + (Math.floor(d.getMonth() / 3) + 1); break;
 					case 'S': c = leftPad(d.getSeconds()); break;
 					case 'y': c = leftPad(d.getFullYear() % 100); break;
 					case 'Y': c = "" + d.getFullYear(); break;
 					case 'p': c = (isAM) ? ("" + "am") : ("" + "pm"); break;
 					case 'P': c = (isAM) ? ("" + "AM") : ("" + "PM"); break;
 					case 'w': c = "" + d.getDay(); break;
 				}
 				r.push(c);
 				escape = false;
 			} else {
 				if (c == "%") {
 					escape = true;
 				} else {
 					r.push(c);
 				}
 			}
 		}
 		return r.join("");
 	}
 	// To have a consistent view of time-based data independent of which time
 	// zone the client happens to be in we need a date-like object independent
 	// of time zones.  This is done through a wrapper that only calls the UTC
 	// versions of the accessor methods.
 	function makeUtcWrapper(d) {
 		function addProxyMethod(sourceObj, sourceMethod, targetObj, targetMethod) {
 			sourceObj[sourceMethod] = function() {
 				return targetObj[targetMethod].apply(targetObj, arguments);
 			};
 		};
 		var utc = {
 			date: d
 		};
 		// support strftime, if found
 		if (d.strftime != undefined) {
 			addProxyMethod(utc, "strftime", d, "strftime");
 		}
 		addProxyMethod(utc, "getTime", d, "getTime");
 		addProxyMethod(utc, "setTime", d, "setTime");
 		var props = ["Date", "Day", "FullYear", "Hours", "Milliseconds", "Minutes", "Month", "Seconds"];
 		for (var p = 0; p < props.length; p++) {
 			addProxyMethod(utc, "get" + props[p], d, "getUTC" + props[p]);
 			addProxyMethod(utc, "set" + props[p], d, "setUTC" + props[p]);
 		}
 		return utc;
 	};
 	// select time zone strategy.  This returns a date-like object tied to the
 	// desired timezone
 	function dateGenerator(ts, opts) {
 		if (opts.timezone == "browser") {
 			return new Date(ts);
 		} else if (!opts.timezone || opts.timezone == "utc") {
 			return makeUtcWrapper(new Date(ts));
 		} else if (typeof timezoneJS != "undefined" && typeof timezoneJS.Date != "undefined") {
 			var d = new timezoneJS.Date();
 			// timezone-js is fickle, so be sure to set the time zone before
 			// setting the time.
 			d.setTimezone(opts.timezone);
 			d.setTime(ts);
 			return d;
 		} else {
 			return makeUtcWrapper(new Date(ts));
 		}
 	}
 	// map of app. size of time units in milliseconds
 	var timeUnitSize = {
 		"second": 1000,
 		"minute": 60 * 1000,
 		"hour": 60 * 60 * 1000,
 		"day": 24 * 60 * 60 * 1000,
 		"month": 30 * 24 * 60 * 60 * 1000,
 		"quarter": 3 * 30 * 24 * 60 * 60 * 1000,
 		"year": 365.2425 * 24 * 60 * 60 * 1000
 	};
 	// the allowed tick sizes, after 1 year we use
 	// an integer algorithm
 	var baseSpec = [
 		[1, "second"], [2, "second"], [5, "second"], [10, "second"],
 		[30, "second"], 
 		[1, "minute"], [2, "minute"], [5, "minute"], [10, "minute"],
 		[30, "minute"], 
 		[1, "hour"], [2, "hour"], [4, "hour"],
 		[8, "hour"], [12, "hour"],
 		[1, "day"], [2, "day"], [3, "day"],
 		[0.25, "month"], [0.5, "month"], [1, "month"],
 		[2, "month"]
 	];
 	// we don't know which variant(s) we'll need yet, but generating both is
 	// cheap
 	var specMonths = baseSpec.concat([[3, "month"], [6, "month"],
 		[1, "year"]]);
 	var specQuarters = baseSpec.concat([[1, "quarter"], [2, "quarter"],
 		[1, "year"]]);
 	function init(plot) {
 		plot.hooks.processOptions.push(function (plot, options) {
 			$.each(plot.getAxes(), function(axisName, axis) {
 				var opts = axis.options;
 				if (opts.mode == "time") {
 					axis.tickGenerator = function(axis) {
 						var ticks = [];
 						var d = dateGenerator(axis.min, opts);
 						var minSize = 0;
 						// make quarter use a possibility if quarters are
 						// mentioned in either of these options
 						var spec = (opts.tickSize && opts.tickSize[1] ===
 							"quarter") ||
 							(opts.minTickSize && opts.minTickSize[1] ===
 							"quarter") ? specQuarters : specMonths;
 						if (opts.minTickSize != null) {
 							if (typeof opts.tickSize == "number") {
 								minSize = opts.tickSize;
 							} else {
 								minSize = opts.minTickSize[0] * timeUnitSize[opts.minTickSize[1]];
 							}
 						}
 						for (var i = 0; i < spec.length - 1; ++i) {
 							if (axis.delta < (spec[i][0] * timeUnitSize[spec[i][1]]
 											  + spec[i + 1][0] * timeUnitSize[spec[i + 1][1]]) / 2
 								&& spec[i][0] * timeUnitSize[spec[i][1]] >= minSize) {
 								break;
 							}
 						}
 						var size = spec[i][0];
 						var unit = spec[i][1];
 						// special-case the possibility of several years
 						if (unit == "year") {
 							// if given a minTickSize in years, just use it,
 							// ensuring that it's an integer
 							if (opts.minTickSize != null && opts.minTickSize[1] == "year") {
 								size = Math.floor(opts.minTickSize[0]);
 							} else {
 								var magn = Math.pow(10, Math.floor(Math.log(axis.delta / timeUnitSize.year) / Math.LN10));
 								var norm = (axis.delta / timeUnitSize.year) / magn;
 								if (norm < 1.5) {
 									size = 1;
 								} else if (norm < 3) {
 									size = 2;
 								} else if (norm < 7.5) {
 									size = 5;
 								} else {
 									size = 10;
 								}
 								size *= magn;
 							}
 							// minimum size for years is 1
 							if (size < 1) {
 								size = 1;
 							}
 						}
 						axis.tickSize = opts.tickSize || [size, unit];
 						var tickSize = axis.tickSize[0];
 						unit = axis.tickSize[1];
 						var step = tickSize * timeUnitSize[unit];
 						if (unit == "second") {
 							d.setSeconds(floorInBase(d.getSeconds(), tickSize));
 						} else if (unit == "minute") {
 							d.setMinutes(floorInBase(d.getMinutes(), tickSize));
 						} else if (unit == "hour") {
 							d.setHours(floorInBase(d.getHours(), tickSize));
 						} else if (unit == "month") {
 							d.setMonth(floorInBase(d.getMonth(), tickSize));
 						} else if (unit == "quarter") {
 							d.setMonth(3 * floorInBase(d.getMonth() / 3,
 								tickSize));
 						} else if (unit == "year") {
 							d.setFullYear(floorInBase(d.getFullYear(), tickSize));
 						}
 						// reset smaller components
 						d.setMilliseconds(0);
 						if (step >= timeUnitSize.minute) {
 							d.setSeconds(0);
 						}
 						if (step >= timeUnitSize.hour) {
 							d.setMinutes(0);
 						}
 						if (step >= timeUnitSize.day) {
 							d.setHours(0);
 						}
 						if (step >= timeUnitSize.day * 4) {
 							d.setDate(1);
 						}
 						if (step >= timeUnitSize.month * 2) {
 							d.setMonth(floorInBase(d.getMonth(), 3));
 						}
 						if (step >= timeUnitSize.quarter * 2) {
 							d.setMonth(floorInBase(d.getMonth(), 6));
 						}
 						if (step >= timeUnitSize.year) {
 							d.setMonth(0);
 						}
 						var carry = 0;
 						var v = Number.NaN;
 						var prev;
 						do {
 							prev = v;
 							v = d.getTime();
 							ticks.push(v);
 							if (unit == "month" || unit == "quarter") {
 								if (tickSize < 1) {
 									// a bit complicated - we'll divide the
 									// month/quarter up but we need to take
 									// care of fractions so we don't end up in
 									// the middle of a day
 									d.setDate(1);
 									var start = d.getTime();
 									d.setMonth(d.getMonth() +
 										(unit == "quarter" ? 3 : 1));
 									var end = d.getTime();
 									d.setTime(v + carry * timeUnitSize.hour + (end - start) * tickSize);
 									carry = d.getHours();
 									d.setHours(0);
 								} else {
 									d.setMonth(d.getMonth() +
 										tickSize * (unit == "quarter" ? 3 : 1));
 								}
 							} else if (unit == "year") {
 								d.setFullYear(d.getFullYear() + tickSize);
 							} else {
 								d.setTime(v + step);
 							}
 						} while (v < axis.max && v != prev);
 						return ticks;
 					};
 					axis.tickFormatter = function (v, axis) {
 						var d = dateGenerator(v, axis.options);
 						// first check global format
 						if (opts.timeformat != null) {
 							return formatDate(d, opts.timeformat, opts.monthNames, opts.dayNames);
 						}
 						// possibly use quarters if quarters are mentioned in
 						// any of these places
 						var useQuarters = (axis.options.tickSize &&
 								axis.options.tickSize[1] == "quarter") ||
 							(axis.options.minTickSize &&
 								axis.options.minTickSize[1] == "quarter");
 						var t = axis.tickSize[0] * timeUnitSize[axis.tickSize[1]];
 						var span = axis.max - axis.min;
 						var suffix = (opts.twelveHourClock) ? " %p" : "";
 						var hourCode = (opts.twelveHourClock) ? "%I" : "%H";
 						var fmt;
 						if (t < timeUnitSize.minute) {
 							fmt = hourCode + ":%M:%S" + suffix;
 						} else if (t < timeUnitSize.day) {
 							if (span < 2 * timeUnitSize.day) {
 								fmt = hourCode + ":%M" + suffix;
 							} else {
 								fmt = "%b %d " + hourCode + ":%M" + suffix;
 							}
 						} else if (t < timeUnitSize.month) {
 							fmt = "%b %d";
 						} else if ((useQuarters && t < timeUnitSize.quarter) ||
 							(!useQuarters && t < timeUnitSize.year)) {
 							if (span < timeUnitSize.year) {
 								fmt = "%b";
 							} else {
 								fmt = "%b %Y";
 							}
 						} else if (useQuarters && t < timeUnitSize.year) {
 							if (span < timeUnitSize.year) {
 								fmt = "Q%q";
 							} else {
 								fmt = "Q%q %Y";
 							}
 						} else {
 							fmt = "%Y";
 						}
 						var rt = formatDate(d, fmt, opts.monthNames, opts.dayNames);
 						return rt;
 					};
 				}
 			});
 		});
 	}
 	$.plot.plugins.push({
 		init: init,
 		options: options,
 		name: 'time',
 		version: '1.0'
 	});
 	// Time-axis support used to be in Flot core, which exposed the
 	// formatDate function on the plot object.  Various plugins depend
 	// on the function, so we need to re-expose it here.
 	$.plot.formatDate = formatDate;
 	$.plot.dateGenerator = dateGenerator;
 })(jQuery);
@@ -1,75 +0,0 @@
 $(document).ready(function() {
  // Start 1-second timer to call RESTful endpoint
  setInterval(function() {
    $.ajax({
      url: '/get_cpu_usage',
      dataType: 'json',
      success: function(json) {
        $('#cpu_usage').text(json.result + '% ');
      }
    });
  }, 1000);
  // Initialize graph
  var $c = $('<div class="graph"/>').appendTo('#graphs');
  var dur = 120;
  var past = Date.now() - dur * 1000;
  var options = {
    lines: {
      fill: true,
      lineWidth: 0,
      fillColor: {colors: [ { opacity: 0 }, { opacity: 1 } ] }
    },
    grid: { borderWidth: 1, borderColor: '#ccc'},
    xaxis: { mode: 'time', ticks: 5 },
    legend: { labelBoxBorderColor: '#fff' },
    colors: [ '#fec', '#396', '#e39', '9e2' ],
    hooks: {
      draw: [function(plot, canvas) {
        canvas.font = '13px sans-serif';
        canvas.fillStyle = '#aaa';
        canvas.fillText('Resource Usage', 35, 25);
      }]
    }
  };
  var plot = $.plot($c, [], options);
  var updateGraph = function(counter) {
    var data = plot.getData();
    var now = Date.now();
    var oldest = now - dur * 1000;
    data[0] = {
      show: false,
      data: [[oldest, null], [now, null]]
    };
    console.log(data);
    // Remove old points
    $.each(data, function(di, d) {
      while (d.data.length > 0 && d.data[0][0] < oldest) {
        d.data.shift();
      }
    });
    // Add new points
    var new_datapoint = [now, counter];
    if (data[1]) {
      data[1].label = 'memory';
      data[1].data.push(new_datapoint);
    } else {
      data[1] = [{ data: [new_datapoint] }];
    }
    // Redraw the graph
    plot.setData(data);
    plot.setupGrid();
    plot.draw();
  };
  // Create Websocket connection. For simplicity, no reconnect logic is here.
  var ws = new WebSocket('ws://' + location.host);
  ws.onmessage = function(ev) {
    updateGraph(ev.data);
  };
 });
@@ -1,87 +0,0 @@
 * {
  outline: none;
 }
 body {
  background: #36c;
  color: #555;
  margin: 0;
  padding: 0;
  font: 16px/1.4 Helvetica, Arial, sans-serif;
 }
 div.content {
  width: 800px;
  margin: 1em auto;
  padding: 2em;
  background-color: #fff;
  border-radius: 1em;
 }
 fieldset {
  border: 1px solid #ccc;
  padding: 1em;
 }
 fieldset legend {
  font-style: italic;
  color: silver;
 }
 fieldset label {
  text-align: right;
  padding: 0 1em;
 }
 input[type=text] {
  font-size: 100%;
  padding: 0.2em;
  border: 1px solid #ccc;
 }
 button {
  color: #666;
  background: #eee;
  border: 1px solid #ccc;
  padding: 0.2em 2em;
  font-size: 100%;
  cursor: pointer;
  margin-top: 1em;
 }
 button:hover {
  background: #ccc;
 }
 code {
  background: #f0f0f0;
  padding: 0 0.3em;
  color: #396;
  border-radius: 0.3em;
 }
 a:link, a:visited {
  color: #69c;
  text-decoration: none;
 }
 #graphs {
  margin-top: 1em;
 }
 .graph {
  min-height: 12em;
  border: 0px solid #ccc;
  position: relative;
  margin: 0 1em 1em 0;
  width: 36em;
  display: inline-block;
 }
 .graph_title {
  position: absolute;
  top: 0.5em; left: 1em;
  color: #ccc;
  font-weight: bold;
  z-index: 999;
 }
@@ -0,0 +1,10 @@
 PROG ?= example
 all: $(PROG)
 	$(DEBUGGER) ./$(PROG)
 $(PROG):
 	$(CC) ../../mongoose.c -I../.. $(CFLAGS) $(EXTRA) -o $(PROG) main.c mjson.c
 clean:
 	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb log.txt
@@ -0,0 +1,82 @@
 // Copyright (c) 2020 Cesanta Software Limited
 // All rights reserved
 #include "mjson.h"  // JSON parsing and printing
 #include "mongoose.h"
 // This is a configuration structure we're going to show on a dashboard
 static struct config {
  int value1;
  char *value2;
 } s_config = {123, NULL};
 // Stringifies the config. A caller must free() it.
 static char *stringify_config(struct config *cfg) {
  char *s = NULL;
  mjson_printf(mjson_print_dynamic_buf, &s, "{%Q:%d,%Q:%Q}", "value1",
               cfg->value1, "value2", cfg->value2);
  return s;
 }
 // Update config structure. Return true if changed, false otherwise
 static bool update_config(struct mg_http_message *hm, struct config *cfg) {
  bool changed = false;
  char buf[256];
  double dv;
  if (mjson_get_number(hm->body.ptr, hm->body.len, "$.value1", &dv)) {
    s_config.value1 = dv;
    changed = true;
  }
  if (mjson_get_string(hm->body.ptr, hm->body.len, "$.value2", buf,
                       sizeof(buf)) > 0) {
    free(s_config.value2);
    s_config.value2 = strdup(buf);
    changed = true;
  }
  return changed;
 }
 // Notify all config watchers about the config change
 static void notify_config_change(struct mg_mgr *mgr) {
  struct mg_connection *c;
  char *s = stringify_config(&s_config);
  for (c = mgr->conns; c != NULL; c = c->next) {
    if (c->label[0] == 'W') mg_http_printf_chunk(c, "%s\n", s);
  }
  free(s);
 }
 // HTTP request handler function. It implements the following endpoints:
 //   /api/config/get - returns current config
 //   /api/config/set - updates current config
 //   /api/config/watch - does not return. Sends config as it changes in
 //   chunks all other URI - serves web_root/ directory
 static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
  if (ev == MG_EV_HTTP_MSG) {
    struct mg_http_message *hm = (struct mg_http_message *) ev_data;
    if (mg_http_match_uri(hm, "/api/config/get")) {
      char *s = stringify_config(&s_config);
      mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Length: %d\r\n\r\n%s\n",
                (int) strlen(s) + 1, s);
      free(s);
    } else if (mg_http_match_uri(hm, "/api/config/set")) {
      if (update_config(hm, &s_config)) notify_config_change(fn_data);
      mg_printf(c, "HTTP/1.1 200 OK\r\nContent-Length: 0\r\n\r\n");
    } else if (mg_http_match_uri(hm, "/api/config/watch")) {
      c->label[0] = 'W';  // Mark ourselves as a config watcher
      mg_printf(c, "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n");
    } else {
      struct mg_http_serve_opts opts = {.root_dir = "web_root"};
      mg_http_serve_dir(c, ev_data, &opts);
    }
  }
 }
 int main(void) {
  struct mg_mgr mgr;
  mg_mgr_init(&mgr);
  mg_http_listen(&mgr, "http://localhost:8000", cb, &mgr);
  for (;;) mg_mgr_poll(&mgr, 1000);
  mg_mgr_free(&mgr);
  return 0;
 }
@@ -0,0 +1,981 @@
 // Copyright (c) 2018-2020 Cesanta Software Limited
 // All rights reserved
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 #include "mjson.h"
 #if !defined(_MSC_VER) || _MSC_VER >= 1700
 #else
 #define va_copy(x, y) (x) = (y)
 #define snprintf _snprintf
 #define alloca _alloca
 #endif
 static int mjson_esc(int c, int esc) {
  const char *p, *esc1 = "\b\f\n\r\t\\\"", *esc2 = "bfnrt\\\"";
  for (p = esc ? esc1 : esc2; *p != '\0'; p++) {
    if (*p == c) return esc ? esc2[p - esc1] : esc1[p - esc2];
  }
  return 0;
 }
 static int mjson_pass_string(const char *s, int len) {
  int i;
  for (i = 0; i < len; i++) {
    if (s[i] == '\\' && i + 1 < len && mjson_esc(s[i + 1], 1)) {
      i++;
    } else if (s[i] == '\0') {
      return MJSON_ERROR_INVALID_INPUT;
    } else if (s[i] == '"') {
      return i;
    }
  }
  return MJSON_ERROR_INVALID_INPUT;
 }
 int mjson(const char *s, int len, mjson_cb_t cb, void *ud) {
  enum { S_VALUE, S_KEY, S_COLON, S_COMMA_OR_EOO } expecting = S_VALUE;
  unsigned char nesting[MJSON_MAX_DEPTH];
  int i, depth = 0;
 #define MJSONCALL(ev) \
  if (cb != NULL && cb(ev, s, start, i - start + 1, ud)) return i + 1;
 // In the ascii table, the distance between `[` and `]` is 2.
 // Ditto for `{` and `}`. Hence +2 in the code below.
 #define MJSONEOO()                                                     \
  do {                                                                 \
    if (c != nesting[depth - 1] + 2) return MJSON_ERROR_INVALID_INPUT; \
    depth--;                                                           \
    if (depth == 0) {                                                  \
      MJSONCALL(tok);                                                  \
      return i + 1;                                                    \
    }                                                                  \
  } while (0)
  for (i = 0; i < len; i++) {
    int start = i;
    unsigned char c = ((unsigned char *) s)[i];
    int tok = c;
    if (c == ' ' || c == '\t' || c == '\n' || c == '\r') continue;
    // printf("- %c [%.*s] %d %d\n", c, i, s, depth, expecting);
    switch (expecting) {
      case S_VALUE:
        if (c == '{') {
          if (depth >= (int) sizeof(nesting)) return MJSON_ERROR_TOO_DEEP;
          nesting[depth++] = c;
          expecting = S_KEY;
          break;
        } else if (c == '[') {
          if (depth >= (int) sizeof(nesting)) return MJSON_ERROR_TOO_DEEP;
          nesting[depth++] = c;
          break;
        } else if (c == ']' && depth > 0) {  // Empty array
          MJSONEOO();
        } else if (c == 't' && i + 3 < len && memcmp(&s[i], "true", 4) == 0) {
          i += 3;
          tok = MJSON_TOK_TRUE;
        } else if (c == 'n' && i + 3 < len && memcmp(&s[i], "null", 4) == 0) {
          i += 3;
          tok = MJSON_TOK_NULL;
        } else if (c == 'f' && i + 4 < len && memcmp(&s[i], "false", 5) == 0) {
          i += 4;
          tok = MJSON_TOK_FALSE;
        } else if (c == '-' || ((c >= '0' && c <= '9'))) {
          char *end = NULL;
          strtod(&s[i], &end);
          if (end != NULL) i += end - &s[i] - 1;
          tok = MJSON_TOK_NUMBER;
        } else if (c == '"') {
          int n = mjson_pass_string(&s[i + 1], len - i - 1);
          if (n < 0) return n;
          i += n + 1;
          tok = MJSON_TOK_STRING;
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        if (depth == 0) {
          MJSONCALL(tok);
          return i + 1;
        }
        expecting = S_COMMA_OR_EOO;
        break;
      case S_KEY:
        if (c == '"') {
          int n = mjson_pass_string(&s[i + 1], len - i - 1);
          if (n < 0) return n;
          i += n + 1;
          tok = MJSON_TOK_KEY;
          expecting = S_COLON;
        } else if (c == '}') {  // Empty object
          MJSONEOO();
          expecting = S_COMMA_OR_EOO;
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        break;
      case S_COLON:
        if (c == ':') {
          expecting = S_VALUE;
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        break;
      case S_COMMA_OR_EOO:
        if (depth <= 0) return MJSON_ERROR_INVALID_INPUT;
        if (c == ',') {
          expecting = (nesting[depth - 1] == '{') ? S_KEY : S_VALUE;
        } else if (c == ']' || c == '}') {
          MJSONEOO();
        } else {
          return MJSON_ERROR_INVALID_INPUT;
        }
        break;
    }
    MJSONCALL(tok);
  }
  return MJSON_ERROR_INVALID_INPUT;
 }
 struct msjon_get_data {
  const char *path;     // Lookup json path
  int pos;              // Current path index
  int d1;               // Current depth of traversal
  int d2;               // Expected depth of traversal
  int i1;               // Index in an array
  int i2;               // Expected index in an array
  int obj;              // If the value is array/object, offset where it starts
  const char **tokptr;  // Destination
  int *toklen;          // Destination length
  int tok;              // Returned token
 };
 static int mjson_plen(const char *s) {
  int i = 0;
  while (s[i] != '\0' && s[i] != '.' && s[i] != '[') i++;
  return i;
 }
 static int mjson_get_cb(int tok, const char *s, int off, int len, void *ud) {
  struct msjon_get_data *data = (struct msjon_get_data *) ud;
  // printf("--> %2x %2d %2d %2d %2d\t'%s'\t'%.*s'\t\t'%.*s'\n", tok, data->d1,
  // data->d2, data->i1, data->i2, data->path + data->pos, off, s, len,
  // s + off);
  if (data->tok != MJSON_TOK_INVALID) return 1;  // Found
  if (tok == '{') {
    if (!data->path[data->pos] && data->d1 == data->d2) data->obj = off;
    data->d1++;
  } else if (tok == '[') {
    if (data->d1 == data->d2 && data->path[data->pos] == '[') {
      data->i1 = 0;
      data->i2 = (int) strtod(&data->path[data->pos + 1], NULL);
      if (data->i1 == data->i2) {
        data->d2++;
        data->pos += 3;
      }
    }
    if (!data->path[data->pos] && data->d1 == data->d2) data->obj = off;
    data->d1++;
  } else if (tok == ',') {
    if (data->d1 == data->d2 + 1) {
      data->i1++;
      if (data->i1 == data->i2) {
        while (data->path[data->pos] != ']') data->pos++;
        data->pos++;
        data->d2++;
      }
    }
  } else if (tok == MJSON_TOK_KEY && data->d1 == data->d2 + 1 &&
             data->path[data->pos] == '.' && s[off] == '"' &&
             s[off + len - 1] == '"' &&
             mjson_plen(&data->path[data->pos + 1]) == len - 2 &&
             !memcmp(s + off + 1, &data->path[data->pos + 1], len - 2)) {
    data->d2++;
    data->pos += len - 1;
  } else if (tok == MJSON_TOK_KEY && data->d1 == data->d2) {
    return 1;  // Exhausted path, not found
  } else if (tok == '}' || tok == ']') {
    data->d1--;
    // data->d2--;
    if (!data->path[data->pos] && data->d1 == data->d2 && data->obj != -1) {
      data->tok = tok - 2;
      if (data->tokptr) *data->tokptr = s + data->obj;
      if (data->toklen) *data->toklen = off - data->obj + 1;
      return 1;
    }
  } else if (MJSON_TOK_IS_VALUE(tok)) {
    // printf("TOK --> %d\n", tok);
    if (data->d1 == data->d2 && !data->path[data->pos]) {
      data->tok = tok;
      if (data->tokptr) *data->tokptr = s + off;
      if (data->toklen) *data->toklen = len;
      return 1;
    }
  }
  return 0;
 }
 enum mjson_tok mjson_find(const char *s, int len, const char *jp,
                          const char **tokptr, int *toklen) {
  struct msjon_get_data data = {jp, 1,  0,      0,      0,
                                0,  -1, tokptr, toklen, MJSON_TOK_INVALID};
  if (jp[0] != '$') return MJSON_TOK_INVALID;
  if (mjson(s, len, mjson_get_cb, &data) < 0) return MJSON_TOK_INVALID;
  return (enum mjson_tok) data.tok;
 }
 int mjson_get_number(const char *s, int len, const char *path, double *v) {
  const char *p;
  int tok, n;
  if ((tok = mjson_find(s, len, path, &p, &n)) == MJSON_TOK_NUMBER) {
    if (v != NULL) *v = strtod(p, NULL);
  }
  return tok == MJSON_TOK_NUMBER ? 1 : 0;
 }
 int mjson_get_bool(const char *s, int len, const char *path, int *v) {
  int tok = mjson_find(s, len, path, NULL, NULL);
  if (tok == MJSON_TOK_TRUE && v != NULL) *v = 1;
  if (tok == MJSON_TOK_FALSE && v != NULL) *v = 0;
  return tok == MJSON_TOK_TRUE || tok == MJSON_TOK_FALSE ? 1 : 0;
 }
 static int mjson_unescape(const char *s, int len, char *to, int n) {
  int i, j;
  for (i = 0, j = 0; i < len && j < n; i++, j++) {
    if (s[i] == '\\' && i + 1 < len) {
      int c = mjson_esc(s[i + 1], 0);
      if (c == 0) return -1;
      to[j] = c;
      i++;
    } else {
      to[j] = s[i];
    }
  }
  if (j >= n) return -1;
  if (n > 0) to[j] = '\0';
  return j;
 }
 int mjson_get_string(const char *s, int len, const char *path, char *to,
                     int n) {
  const char *p;
  int sz;
  if (mjson_find(s, len, path, &p, &sz) != MJSON_TOK_STRING) return -1;
  return mjson_unescape(p + 1, sz - 2, to, n);
 }
 int mjson_get_hex(const char *s, int len, const char *x, char *to, int n) {
  const char *p;
  int i, j, sz;
  if (mjson_find(s, len, x, &p, &sz) != MJSON_TOK_STRING) return -1;
  for (i = j = 0; i < sz - 3 && j < n; i += 2, j++) {
 #define HEXTOI(x) (x >= '0' && x <= '9' ? x - '0' : x - 'W')
    unsigned char a = *(const unsigned char *) (p + i + 1);
    unsigned char b = *(const unsigned char *) (p + i + 2);
    ((unsigned char *) to)[j] = (HEXTOI(a) << 4) | HEXTOI(b);
  }
  if (j < n) to[j] = '\0';
  return j;
 }
 #if MJSON_ENABLE_BASE64
 static int mjson_base64rev(int c) {
  if (c >= 'A' && c <= 'Z') {
    return c - 'A';
  } else if (c >= 'a' && c <= 'z') {
    return c + 26 - 'a';
  } else if (c >= '0' && c <= '9') {
    return c + 52 - '0';
  } else if (c == '+') {
    return 62;
  } else if (c == '/') {
    return 63;
  } else {
    return 64;
  }
 }
 int mjson_base64_dec(const char *src, int n, char *dst, int dlen) {
  const char *end = src + n;
  int len = 0;
  while (src + 3 < end && len < dlen) {
    int a = mjson_base64rev(src[0]), b = mjson_base64rev(src[1]),
        c = mjson_base64rev(src[2]), d = mjson_base64rev(src[3]);
    dst[len++] = (a << 2) | (b >> 4);
    if (src[2] != '=' && len < dlen) {
      dst[len++] = (b << 4) | (c >> 2);
      if (src[3] != '=' && len < dlen) {
        dst[len++] = (c << 6) | d;
      }
    }
    src += 4;
  }
  if (len < dlen) dst[len] = '\0';
  return len;
 }
 int mjson_get_base64(const char *s, int len, const char *path, char *to,
                     int n) {
  const char *p;
  int sz;
  if (mjson_find(s, len, path, &p, &sz) != MJSON_TOK_STRING) return 0;
  return mjson_base64_dec(p + 1, sz - 2, to, n);
 }
 #endif  // MJSON_ENABLE_BASE64
 #if MJSON_ENABLE_NEXT
 struct nextdata {
  int off, len, depth, t, vo, arrayindex;
  int *koff, *klen, *voff, *vlen, *vtype;
 };
 static int next_cb(int tok, const char *s, int off, int len, void *ud) {
  struct nextdata *d = (struct nextdata *) ud;
  // int i;
  switch (tok) {
    case '{':
    case '[':
      if (d->depth == 0 && tok == '[') d->arrayindex = 0;
      if (d->depth == 1 && off > d->off) {
        d->vo = off;
        d->t = tok == '{' ? MJSON_TOK_OBJECT : MJSON_TOK_ARRAY;
        if (d->voff) *d->voff = off;
        if (d->vtype) *d->vtype = d->t;
      }
      d->depth++;
      break;
    case '}':
    case ']':
      d->depth--;
      if (d->depth == 1 && d->vo) {
        d->len = off + len;
        if (d->vlen) *d->vlen = d->len - d->vo;
        if (d->arrayindex >= 0) {
          if (d->koff) *d->koff = d->arrayindex;  // koff holds array index
          if (d->klen) *d->klen = 0;              // klen holds 0
        }
        return 1;
      }
      if (d->depth == 1 && d->arrayindex >= 0) d->arrayindex++;
      break;
    case ',':
    case ':':
      break;
    case MJSON_TOK_KEY:
      if (d->depth == 1 && d->off < off) {
        if (d->koff) *d->koff = off;  // And report back to the user
        if (d->klen) *d->klen = len;  // If we have to
      }
      break;
    default:
      if (d->depth != 1) break;
      // If we're iterating over the array
      if (off > d->off) {
        d->len = off + len;
        if (d->vlen) *d->vlen = len;    // value length
        if (d->voff) *d->voff = off;    // value offset
        if (d->vtype) *d->vtype = tok;  // value type
        if (d->arrayindex >= 0) {
          if (d->koff) *d->koff = d->arrayindex;  // koff holds array index
          if (d->klen) *d->klen = 0;              // klen holds 0
        }
        return 1;
      }
      if (d->arrayindex >= 0) d->arrayindex++;
      break;
  }
  (void) s;
  return 0;
 }
 int mjson_next(const char *s, int n, int off, int *koff, int *klen, int *voff,
               int *vlen, int *vtype) {
  struct nextdata d = {off, 0, 0, 0, 0, -1, koff, klen, voff, vlen, vtype};
  mjson(s, n, next_cb, &d);
  return d.len;
 }
 #endif
 #if MJSON_ENABLE_PRINT
 int mjson_print_fixed_buf(const char *ptr, int len, void *fndata) {
  struct mjson_fixedbuf *fb = (struct mjson_fixedbuf *) fndata;
  int i, left = fb->size - 1 - fb->len;
  if (left < len) len = left;
  for (i = 0; i < len; i++) fb->ptr[fb->len + i] = ptr[i];
  fb->len += len;
  fb->ptr[fb->len] = '\0';
  return len;
 }
 int mjson_print_dynamic_buf(const char *ptr, int len, void *fndata) {
  char *s, *buf = *(char **) fndata;
  int curlen = buf == NULL ? 0 : strlen(buf);
  if ((s = (char *) realloc(buf, curlen + len + 1)) == NULL) {
    return 0;
  } else {
    memcpy(s + curlen, ptr, len);
    s[curlen + len] = '\0';
    *(char **) fndata = s;
    return len;
  }
 }
 int mjson_print_null(const char *ptr, int len, void *userdata) {
  (void) ptr;
  (void) userdata;
  return len;
 }
 int mjson_print_file(const char *ptr, int len, void *userdata) {
  return fwrite(ptr, 1, len, (FILE *) userdata);
 }
 int mjson_print_buf(mjson_print_fn_t fn, void *fndata, const char *buf,
                    int len) {
  return fn(buf, len, fndata);
 }
 int mjson_print_int(mjson_print_fn_t fn, void *fndata, int value,
                    int is_signed) {
  char buf[20];
  int len = snprintf(buf, sizeof(buf), is_signed ? "%d" : "%u", value);
  return fn(buf, len, fndata);
 }
 int mjson_print_long(mjson_print_fn_t fn, void *fndata, long value,
                     int is_signed) {
  char buf[20];
  const char *fmt = (is_signed ? "%ld" : "%lu");
  int len = snprintf(buf, sizeof(buf), fmt, value);
  return fn(buf, len, fndata);
 }
 int mjson_print_dbl(mjson_print_fn_t fn, void *fndata, double d,
                    const char *fmt) {
  char buf[40];
  int n = snprintf(buf, sizeof(buf), fmt, d);
  return fn(buf, n, fndata);
 }
 int mjson_print_str(mjson_print_fn_t fn, void *fndata, const char *s, int len) {
  int i, n = fn("\"", 1, fndata);
  for (i = 0; i < len; i++) {
    char c = mjson_esc(s[i], 1);
    if (c) {
      n += fn("\\", 1, fndata);
      n += fn(&c, 1, fndata);
    } else {
      n += fn(&s[i], 1, fndata);
    }
  }
  return n + fn("\"", 1, fndata);
 }
 #if MJSON_ENABLE_BASE64
 int mjson_print_b64(mjson_print_fn_t fn, void *fndata, const unsigned char *s,
                    int n) {
  const char *t =
      "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
  int i, len = fn("\"", 1, fndata);
  for (i = 0; i < n; i += 3) {
    int a = s[i], b = i + 1 < n ? s[i + 1] : 0, c = i + 2 < n ? s[i + 2] : 0;
    char buf[4] = {t[a >> 2], t[(a & 3) << 4 | (b >> 4)], '=', '='};
    if (i + 1 < n) buf[2] = t[(b & 15) << 2 | (c >> 6)];
    if (i + 2 < n) buf[3] = t[c & 63];
    len += fn(buf, sizeof(buf), fndata);
  }
  return len + fn("\"", 1, fndata);
 }
 #endif /* MJSON_ENABLE_BASE64 */
 int mjson_vprintf(mjson_print_fn_t fn, void *fndata, const char *fmt,
                  va_list xap) {
  int i = 0, n = 0;
  va_list ap;
  va_copy(ap, xap);
  while (fmt[i] != '\0') {
    if (fmt[i] == '%') {
      char fc = fmt[++i];
      int is_long = 0;
      if (fc == 'l') {
        is_long = 1;
        fc = fmt[i + 1];
      }
      if (fc == 'Q') {
        char *buf = va_arg(ap, char *);
        n += mjson_print_str(fn, fndata, buf ? buf : "", buf ? strlen(buf) : 0);
      } else if (strncmp(&fmt[i], ".*Q", 3) == 0) {
        int len = va_arg(ap, int);
        char *buf = va_arg(ap, char *);
        n += mjson_print_str(fn, fndata, buf, len);
        i += 2;
      } else if (fc == 'd' || fc == 'u') {
        int is_signed = (fc == 'd');
        if (is_long) {
          long val = va_arg(ap, long);
          n += mjson_print_long(fn, fndata, val, is_signed);
          i++;
        } else {
          int val = va_arg(ap, int);
          n += mjson_print_int(fn, fndata, val, is_signed);
        }
      } else if (fc == 'B') {
        const char *s = va_arg(ap, int) ? "true" : "false";
        n += mjson_print_buf(fn, fndata, s, strlen(s));
      } else if (fc == 's') {
        char *buf = va_arg(ap, char *);
        n += mjson_print_buf(fn, fndata, buf, strlen(buf));
      } else if (strncmp(&fmt[i], ".*s", 3) == 0) {
        int len = va_arg(ap, int);
        char *buf = va_arg(ap, char *);
        n += mjson_print_buf(fn, fndata, buf, len);
        i += 2;
      } else if (fc == 'g') {
        n += mjson_print_dbl(fn, fndata, va_arg(ap, double), "%g");
      } else if (fc == 'f') {
        n += mjson_print_dbl(fn, fndata, va_arg(ap, double), "%f");
 #if MJSON_ENABLE_BASE64
      } else if (fc == 'V') {
        int len = va_arg(ap, int);
        const char *buf = va_arg(ap, const char *);
        n += mjson_print_b64(fn, fndata, (unsigned char *) buf, len);
 #endif
      } else if (fc == 'H') {
        const char *hex = "0123456789abcdef";
        int i, len = va_arg(ap, int);
        const unsigned char *p = va_arg(ap, const unsigned char *);
        n += fn("\"", 1, fndata);
        for (i = 0; i < len; i++) {
          n += fn(&hex[(p[i] >> 4) & 15], 1, fndata);
          n += fn(&hex[p[i] & 15], 1, fndata);
        }
        n += fn("\"", 1, fndata);
      } else if (fc == 'M') {
        mjson_vprint_fn_t vfn = va_arg(ap, mjson_vprint_fn_t);
        n += vfn(fn, fndata, &ap);
      }
      i++;
    } else {
      n += mjson_print_buf(fn, fndata, &fmt[i++], 1);
    }
  }
  va_end(xap);
  va_end(ap);
  return n;
 }
 int mjson_printf(mjson_print_fn_t fn, void *fndata, const char *fmt, ...) {
  va_list ap;
  int len;
  va_start(ap, fmt);
  len = mjson_vprintf(fn, fndata, fmt, ap);
  va_end(ap);
  return len;
 }
 #endif /* MJSON_ENABLE_PRINT */
 #if MJSON_IMPLEMENT_STRTOD
 static inline int is_digit(int c) {
  return c >= '0' && c <= '9';
 }
 /* NOTE: strtod() implementation by Yasuhiro Matsumoto. */
 double strtod(const char *str, char **end) {
  double d = 0.0;
  int sign = 1, n = 0;
  const char *p = str, *a = str;
  /* decimal part */
  if (*p == '-') {
    sign = -1;
    ++p;
  } else if (*p == '+')
    ++p;
  if (is_digit(*p)) {
    d = (double) (*p++ - '0');
    while (*p && is_digit(*p)) {
      d = d * 10.0 + (double) (*p - '0');
      ++p;
      ++n;
    }
    a = p;
  } else if (*p != '.')
    goto done;
  d *= sign;
  /* fraction part */
  if (*p == '.') {
    double f = 0.0;
    double base = 0.1;
    ++p;
    if (is_digit(*p)) {
      while (*p && is_digit(*p)) {
        f += base * (*p - '0');
        base /= 10.0;
        ++p;
        ++n;
      }
    }
    d += f * sign;
    a = p;
  }
  /* exponential part */
  if ((*p == 'E') || (*p == 'e')) {
    int e = 0;
    ++p;
    sign = 1;
    if (*p == '-') {
      sign = -1;
      ++p;
    } else if (*p == '+')
      ++p;
    if (is_digit(*p)) {
      while (*p == '0') ++p;
      e = (int) (*p++ - '0');
      while (*p && is_digit(*p)) {
        e = e * 10 + (int) (*p - '0');
        ++p;
      }
      e *= sign;
    } else if (!is_digit(*(a - 1))) {
      a = str;
      goto done;
    } else if (*p == 0)
      goto done;
    if (d == 2.2250738585072011 && e == -308) {
      d = 0.0;
      a = p;
      goto done;
    }
    if (d == 2.2250738585072012 && e <= -308) {
      d *= 1.0e-308;
      a = p;
      goto done;
    }
    {
      int i;
      for (i = 0; i < 10; i++) d *= 10;
    }
    a = p;
  } else if (p > str && !is_digit(*(p - 1))) {
    a = str;
    goto done;
  }
 done:
  if (end) *end = (char *) a;
  return d;
 }
 #endif
 #if MJSON_ENABLE_MERGE
 int mjson_merge(const char *s, int n, const char *s2, int n2,
                mjson_print_fn_t fn, void *userdata) {
  int koff, klen, voff, vlen, t, t2, k, off = 0, len = 0, comma = 0;
  if (n < 2) return len;
  len += fn("{", 1, userdata);
  while ((off = mjson_next(s, n, off, &koff, &klen, &voff, &vlen, &t)) != 0) {
 #if !defined(_MSC_VER) || _MSC_VER >= 1700
    char path[klen + 1];
 #else
    char *path = (char *) alloca(klen + 1);
 #endif
    const char *val;
    memcpy(path, "$.", 2);
    memcpy(path + 2, s + koff + 1, klen - 2);
    path[klen] = '\0';
    if ((t2 = mjson_find(s2, n2, path, &val, &k)) != MJSON_TOK_INVALID) {
      if (t2 == MJSON_TOK_NULL) continue;  // null deletes the key
    } else {
      val = s + voff;  // Key is not found in the update. Copy the old value.
    }
    if (comma) len += fn(",", 1, userdata);
    len += fn(s + koff, klen, userdata);
    len += fn(":", 1, userdata);
    if (t == MJSON_TOK_OBJECT && t2 == MJSON_TOK_OBJECT) {
      len += mjson_merge(s + voff, vlen, val, k, fn, userdata);
    } else {
      if (t2 != MJSON_TOK_INVALID) vlen = k;
      len += fn(val, vlen, userdata);
    }
    comma = 1;
  }
  // Add missing keys
  off = 0;
  while ((off = mjson_next(s2, n2, off, &koff, &klen, &voff, &vlen, &t)) != 0) {
 #if !defined(_MSC_VER) || _MSC_VER >= 1700
    char path[klen + 1];
 #else
    char *path = (char *) alloca(klen + 1);
 #endif
    const char *val;
    if (t == MJSON_TOK_NULL) continue;
    memcpy(path, "$.", 2);
    memcpy(path + 2, s2 + koff + 1, klen - 2);
    path[klen] = '\0';
    if (mjson_find(s, n, path, &val, &vlen) != MJSON_TOK_INVALID) continue;
    if (comma) len += fn(",", 1, userdata);
    len += fn(s2 + koff, klen, userdata);
    len += fn(":", 1, userdata);
    len += fn(s2 + voff, vlen, userdata);
    comma = 1;
  }
  len += fn("}", 1, userdata);
  return len;
 }
 #endif  // MJSON_ENABLE_MERGE
 #if MJSON_ENABLE_PRETTY
 struct prettydata {
  int level;
  int len;
  int prev;
  const char *pad;
  int padlen;
  mjson_print_fn_t fn;
  void *userdata;
 };
 static int pretty_cb(int ev, const char *s, int off, int len, void *ud) {
  struct prettydata *d = (struct prettydata *) ud;
  int i;
  switch (ev) {
    case '{':
    case '[':
      d->level++;
      d->len += d->fn(s + off, len, d->userdata);
      break;
    case '}':
    case ']':
      d->level--;
      if (d->prev != '[' && d->prev != '{' && d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      d->len += d->fn(s + off, len, d->userdata);
      break;
    case ',':
      d->len += d->fn(s + off, len, d->userdata);
      if (d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      break;
    case ':':
      d->len += d->fn(s + off, len, d->userdata);
      if (d->padlen > 0) d->len += d->fn(" ", 1, d->userdata);
      break;
    case MJSON_TOK_KEY:
      if (d->prev == '{' && d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      d->len += d->fn(s + off, len, d->userdata);
      break;
    default:
      if (d->prev == '[' && d->padlen > 0) {
        d->len += d->fn("\n", 1, d->userdata);
        for (i = 0; i < d->level; i++)
          d->len += d->fn(d->pad, d->padlen, d->userdata);
      }
      d->len += d->fn(s + off, len, d->userdata);
      break;
  }
  d->prev = ev;
  return 0;
 }
 int mjson_pretty(const char *s, int n, const char *pad, mjson_print_fn_t fn,
                 void *userdata) {
  struct prettydata d = {0, 0, 0, pad, strlen(pad), fn, userdata};
  if (mjson(s, n, pretty_cb, &d) < 0) return -1;
  return d.len;
 }
 #endif  // MJSON_ENABLE_PRETTY
 #if MJSON_ENABLE_RPC
 struct jsonrpc_ctx jsonrpc_default_context;
 struct jsonrpc_userdata {
  mjson_print_fn_t fn;
  void *fndata;
 };
 int mjson_globmatch(const char *s1, int n1, const char *s2, int n2) {
  int i = 0, j = 0, ni = 0, nj = 0;
  while (i < n1 || j < n2) {
    if (i < n1 && j < n2 && (s1[i] == '?' || s2[j] == s1[i])) {
      i++, j++;
    } else if (i < n1 && (s1[i] == '*' || s1[i] == '#')) {
      ni = i, nj = j + 1, i++;
    } else if (nj > 0 && nj <= n2 && (s1[i - 1] == '#' || s2[j] != '/')) {
      i = ni, j = nj;
    } else {
      return 0;
    }
  }
  return 1;
 }
 static int jsonrpc_printer(const char *buf, int len, void *userdata) {
  struct jsonrpc_userdata *u = (struct jsonrpc_userdata *) userdata;
  return u->fn(buf, len, u->fndata);
 }
 void jsonrpc_return_errorv(struct jsonrpc_request *r, int code,
                           const char *message, const char *data_fmt,
                           va_list ap) {
  if (r->id_len == 0) return;
  mjson_printf(r->fn, r->fndata,
               "{\"id\":%.*s,\"error\":{\"code\":%d,\"message\":%Q", r->id_len,
               r->id, code, message == NULL ? "" : message);
  if (data_fmt != NULL) {
  	mjson_printf(r->fn, r->fndata, ",\"data\":");
    mjson_vprintf(r->fn, r->fndata, data_fmt, ap);
  }
  mjson_printf(r->fn, r->fndata, "}}\n");
 }
 void jsonrpc_return_error(struct jsonrpc_request *r, int code,
                          const char *message, const char *data_fmt, ...) {
  va_list ap;
  va_start(ap, data_fmt);
  jsonrpc_return_errorv(r, code, message, data_fmt, ap);
  va_end(ap);
 }
 void jsonrpc_return_successv(struct jsonrpc_request *r, const char *result_fmt,
                             va_list ap) {
  if (r->id_len == 0) return;
  mjson_printf(r->fn, r->fndata, "{\"id\":%.*s,\"result\":", r->id_len, r->id);
  if (result_fmt != NULL) {
    mjson_vprintf(r->fn, r->fndata, result_fmt, ap);
  } else {
    mjson_printf(r->fn, r->fndata, "%s", "null");
  }
  mjson_printf(r->fn, r->fndata, "}\n");
 }
 void jsonrpc_return_success(struct jsonrpc_request *r, const char *result_fmt,
                            ...) {
  va_list ap;
  va_start(ap, result_fmt);
  jsonrpc_return_successv(r, result_fmt, ap);
  va_end(ap);
 }
 void jsonrpc_ctx_process(struct jsonrpc_ctx *ctx, const char *req, int req_sz,
                         mjson_print_fn_t fn, void *fndata) {
  const char *result = NULL, *error = NULL;
  int result_sz = 0, error_sz = 0;
  struct jsonrpc_method *m = NULL;
  struct jsonrpc_userdata d;
  struct jsonrpc_request r = {req, req_sz,           0,    0,   0, 0, 0,
                              0,   &jsonrpc_printer, NULL, NULL};
  d.fn = fn;
  d.fndata = fndata;
  r.fndata = &d;
  // Is is a response frame?
  mjson_find(req, req_sz, "$.result", &result, &result_sz);
  if (result == NULL) mjson_find(req, req_sz, "$.error", &error, &error_sz);
  if (result_sz > 0 || error_sz > 0) {
    if (ctx->response_cb != NULL) ctx->response_cb(req, req_sz, ctx->userdata);
    return;
  }
  // Method must exist and must be a string
  if (mjson_find(req, req_sz, "$.method", &r.method, &r.method_len) !=
      MJSON_TOK_STRING) {
    mjson_printf(fn, fndata, "{\"error\":{\"code\":-32700,\"message\":%.*Q}}\n",
                 req_sz, req);
    ctx->in_len = 0;
    return;
  }
  // id and params are optional
  mjson_find(req, req_sz, "$.id", &r.id, &r.id_len);
  mjson_find(req, req_sz, "$.params", &r.params, &r.params_len);
  for (m = ctx->methods; m != NULL; m = m->next) {
    if (mjson_globmatch(m->method, m->method_sz, r.method + 1,
                        r.method_len - 2) > 0) {
      if (r.params == NULL) r.params = "";
      r.userdata = m->cbdata;
      m->cb(&r);
      break;
    }
  }
  if (m == NULL) {
    jsonrpc_return_error(&r, JSONRPC_ERROR_NOT_FOUND, "method not found", NULL);
  }
 }
 static int jsonrpc_print_methods(mjson_print_fn_t fn, void *fndata,
                                 va_list *ap) {
  struct jsonrpc_ctx *ctx = va_arg(*ap, struct jsonrpc_ctx *);
  struct jsonrpc_method *m;
  int len = 0;
  for (m = ctx->methods; m != NULL; m = m->next) {
    if (m != ctx->methods) len += mjson_print_buf(fn, fndata, ",", 1);
    len += mjson_print_str(fn, fndata, m->method, strlen(m->method));
  }
  return len;
 }
 static void rpclist(struct jsonrpc_request *r) {
  jsonrpc_return_success(r, "[%M]", jsonrpc_print_methods, r->userdata);
 }
 void jsonrpc_ctx_init(struct jsonrpc_ctx *ctx, mjson_print_fn_t response_cb,
                      void *userdata) {
  ctx->response_cb = response_cb;
  ctx->userdata = userdata;
  jsonrpc_ctx_export(ctx, MJSON_RPC_LIST_NAME, rpclist, ctx);
 }
 void jsonrpc_ctx_process_byte(struct jsonrpc_ctx *ctx, unsigned char ch,
                              mjson_print_fn_t fn, void *p) {
  if (ctx->in_len >= (int) sizeof(ctx->in)) ctx->in_len = 0;  // Overflow
  if (ch == '\n') {  // If new line, parse frame
    if (ctx->in_len > 1) jsonrpc_ctx_process(ctx, ctx->in, ctx->in_len, fn, p);
    ctx->in_len = 0;
  } else {
    ctx->in[ctx->in_len] = ch;  // Append to the buffer
    ctx->in_len++;
  }
 }
 void jsonrpc_init(mjson_print_fn_t response_cb, void *userdata) {
  jsonrpc_ctx_init(&jsonrpc_default_context, response_cb, userdata);
 }
 #endif  // MJSON_ENABLE_RPC
@@ -0,0 +1,220 @@
 // Copyright (c) 2018-2020 Cesanta Software Limited
 // All rights reserved
 //
 // Permission is hereby granted, free of charge, to any person obtaining a copy
 // of this software and associated documentation files (the "Software"), to deal
 // in the Software without restriction, including without limitation the rights
 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 // copies of the Software, and to permit persons to whom the Software is
 // furnished to do so, subject to the following conditions:
 //
 // The above copyright notice and this permission notice shall be included in
 // all copies or substantial portions of the Software.
 //
 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 // SOFTWARE.
 #ifndef MJSON_H
 #define MJSON_H
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
 #ifndef MJSON_ENABLE_PRINT
 #define MJSON_ENABLE_PRINT 1
 #endif
 #ifndef MJSON_ENABLE_RPC
 #define MJSON_ENABLE_RPC 1
 #endif
 #ifndef MJSON_ENABLE_BASE64
 #define MJSON_ENABLE_BASE64 1
 #endif
 #ifndef MJSON_ENABLE_MERGE
 #define MJSON_ENABLE_MERGE 0
 #elif MJSON_ENABLE_MERGE
 #define MJSON_ENABLE_NEXT 1
 #endif
 #ifndef MJSON_ENABLE_PRETTY
 #define MJSON_ENABLE_PRETTY 0
 #elif MJSON_ENABLE_PRETTY
 #define MJSON_ENABLE_NEXT 1
 #endif
 #ifndef MJSON_ENABLE_NEXT
 #define MJSON_ENABLE_NEXT 0
 #endif
 #ifndef MJSON_RPC_IN_BUF_SIZE
 #define MJSON_RPC_IN_BUF_SIZE 256
 #endif
 #ifndef MJSON_RPC_LIST_NAME
 #define MJSON_RPC_LIST_NAME "rpc.list"
 #endif
 #ifdef __cplusplus
 extern "C" {
 #endif
 enum {
  MJSON_ERROR_INVALID_INPUT = -1,
  MJSON_ERROR_TOO_DEEP = -2,
 };
 enum mjson_tok {
  MJSON_TOK_INVALID = 0,
  MJSON_TOK_KEY = 1,
  MJSON_TOK_STRING = 11,
  MJSON_TOK_NUMBER = 12,
  MJSON_TOK_TRUE = 13,
  MJSON_TOK_FALSE = 14,
  MJSON_TOK_NULL = 15,
  MJSON_TOK_ARRAY = 91,
  MJSON_TOK_OBJECT = 123,
 };
 #define MJSON_TOK_IS_VALUE(t) ((t) > 10 && (t) < 20)
 typedef int (*mjson_cb_t)(int ev, const char *s, int off, int len, void *ud);
 #ifndef MJSON_MAX_DEPTH
 #define MJSON_MAX_DEPTH 20
 #endif
 int mjson(const char *s, int len, mjson_cb_t cb, void *ud);
 enum mjson_tok mjson_find(const char *s, int len, const char *jp,
                          const char **tokptr, int *toklen);
 int mjson_get_number(const char *s, int len, const char *path, double *v);
 int mjson_get_bool(const char *s, int len, const char *path, int *v);
 int mjson_get_string(const char *s, int len, const char *path, char *to, int n);
 int mjson_get_hex(const char *s, int len, const char *path, char *to, int n);
 #if MJSON_ENABLE_NEXT
 int mjson_next(const char *s, int n, int off, int *koff, int *klen, int *voff,
               int *vlen, int *vtype);
 #endif
 #if MJSON_ENABLE_BASE64
 int mjson_get_base64(const char *s, int len, const char *path, char *to, int n);
 int mjson_base64_dec(const char *src, int n, char *dst, int dlen);
 #endif
 #if MJSON_ENABLE_PRINT
 typedef int (*mjson_print_fn_t)(const char *buf, int len, void *userdata);
 typedef int (*mjson_vprint_fn_t)(mjson_print_fn_t, void *, va_list *);
 struct mjson_fixedbuf {
  char *ptr;
  int size, len;
 };
 int mjson_printf(mjson_print_fn_t, void *, const char *fmt, ...);
 int mjson_vprintf(mjson_print_fn_t, void *, const char *fmt, va_list ap);
 int mjson_print_str(mjson_print_fn_t, void *, const char *s, int len);
 int mjson_print_int(mjson_print_fn_t, void *, int value, int is_signed);
 int mjson_print_long(mjson_print_fn_t, void *, long value, int is_signed);
 int mjson_print_buf(mjson_print_fn_t fn, void *, const char *buf, int len);
 int mjson_print_null(const char *ptr, int len, void *userdata);
 int mjson_print_file(const char *ptr, int len, void *userdata);
 int mjson_print_fixed_buf(const char *ptr, int len, void *userdata);
 int mjson_print_dynamic_buf(const char *ptr, int len, void *userdata);
 #if MJSON_ENABLE_PRETTY
 int mjson_pretty(const char *, int, const char *, mjson_print_fn_t, void *);
 #endif
 #if MJSON_ENABLE_MERGE
 int mjson_merge(const char *, int, const char *, int, mjson_print_fn_t, void *);
 #endif
 #endif  // MJSON_ENABLE_PRINT
 #if MJSON_ENABLE_RPC
 void jsonrpc_init(mjson_print_fn_t, void *userdata);
 int mjson_globmatch(const char *s1, int n1, const char *s2, int n2);
 struct jsonrpc_request {
  const char *frame;    // Points to the whole frame
  int frame_len;        // Frame length
  const char *params;   // Points to the "params" in the request frame
  int params_len;       // Length of the "params"
  const char *id;       // Points to the "id" in the request frame
  int id_len;           // Length of the "id"
  const char *method;   // Points to the "method" in the request frame
  int method_len;       // Length of the "method"
  mjson_print_fn_t fn;  // Printer function
  void *fndata;         // Printer function data
  void *userdata;       // Callback's user data as specified at export time
 };
 struct jsonrpc_method {
  const char *method;
  int method_sz;
  void (*cb)(struct jsonrpc_request *);
  void *cbdata;
  struct jsonrpc_method *next;
 };
 // Main RPC context, stores current request information and a list of
 // exported RPC methods.
 struct jsonrpc_ctx {
  struct jsonrpc_method *methods;
  void *userdata;
  mjson_print_fn_t response_cb;
  int in_len;
  char in[MJSON_RPC_IN_BUF_SIZE];
 };
 // Registers function fn under the given name within the given RPC context
 #define jsonrpc_ctx_export(ctx, name, fn, ud)                                \
  do {                                                                       \
    static struct jsonrpc_method m = {(name), sizeof(name) - 1, (fn), 0, 0}; \
    m.cbdata = (ud);                                                         \
    m.next = (ctx)->methods;                                                 \
    (ctx)->methods = &m;                                                     \
  } while (0)
 void jsonrpc_ctx_init(struct jsonrpc_ctx *ctx, mjson_print_fn_t, void *);
 void jsonrpc_return_error(struct jsonrpc_request *r, int code,
                          const char *message, const char *data_fmt, ...);
 void jsonrpc_return_success(struct jsonrpc_request *r, const char *result_fmt,
                            ...);
 void jsonrpc_ctx_process(struct jsonrpc_ctx *ctx, const char *req, int req_sz,
                         mjson_print_fn_t fn, void *fndata);
 void jsonrpc_ctx_process_byte(struct jsonrpc_ctx *ctx, unsigned char ch,
                              mjson_print_fn_t fn, void *fndata);
 extern struct jsonrpc_ctx jsonrpc_default_context;
 #define jsonrpc_export(name, fn, ud) \
  jsonrpc_ctx_export(&jsonrpc_default_context, (name), (fn), (ud))
 #define jsonrpc_process(buf, len, fn, data) \
  jsonrpc_ctx_process(&jsonrpc_default_context, (buf), (len), (fn), (data))
 #define jsonrpc_process_byte(x, fn, data) \
  jsonrpc_ctx_process_byte(&jsonrpc_default_context, (x), (fn), (data))
 #define JSONRPC_ERROR_INVALID -32700    /* Invalid JSON was received */
 #define JSONRPC_ERROR_NOT_FOUND -32601  /* The method does not exist */
 #define JSONRPC_ERROR_BAD_PARAMS -32602 /* Invalid params passed */
 #define JSONRPC_ERROR_INTERNAL -32603   /* Internal JSON-RPC error */
 #endif  // MJSON_ENABLE_RPC
 #ifdef __cplusplus
 }
 #endif
 #endif  // MJSON_H
@@ -0,0 +1,76 @@
 const {h, render, Component} = preact;
 const html = htm.bind(h);
 const Info = () => html`<div id="info">
  This dashboard shows values kept in server memory. Many clients
  can open this page. As soon as any client changes any value,
  all clients update automatically.
  <br/><br/>
  The JS code that watches state changes, reconnects on network failures.
  That means if server restarts, dashboard on all connected clients
  refresh automatically.
  <br/><br/>
  You can use <code>curl</code> command-line utility:
  <br/><code>curl localhost:8000/api/config/get</code>
  <br/><code>curl localhost:8000/api/config/watch</code>
  <br/><code>curl localhost:8000/api/config/set -d '{"a":123}'</code>
 </div>`;
 class Dashboard extends Component {
  state = {value1: null, value2: null};
  componentDidMount() {
    axios.get('/api/config/get')
        .then(r => this.setState(r.data))
        .catch(e => console.log(e));
    var self = this;
    var f = function(reader) {
      return reader.read().then(function(result) {
        var data = String.fromCharCode.apply(null, result.value);
        self.setState(JSON.parse(data));
        // console.log(JSON.parse(data));
        if (!result.done) return f(reader);
      });
    };
    fetch('/api/config/watch')
        .then(r => r.body.getReader())
        .then(f)
        .catch(e => setTimeout(x => self.componentDidMount(), 1000));
  }
  render(props, state) {
    return html
    `<div id="dashboard" style="display: flex; justify-content: flex-evenly;">
        <div style="width:50%;text-align:center;">Value 1 (number):
          <div style="font-size:140%;"><b>${state.value1}</b></div></div>
        <div style="width:50%;text-align:center;">Value 2 (string):
          <div style="font-size:140%;"><b>${state.value2}</b></div></div>
    </div>`
  }
 };
 class Form extends Component {
  render(props, state) {
    const onclick = ev => axios.post(
        '/api/config/set', {value1: +state.value1, value2: state.value2});
    // alert(JSON.stringify(state));
    return html`<div id="form">
      <div><b>Change values</b></div>
      <table>
        <tr><td>Value 1 (number):</td><td><input value=${state.value1}
          onInput=${linkState(this, 'value1')} /></td></tr>
        <tr><td>Value 2 (string):</td><td><input value=${state.value2}
            onInput=${linkState(this, 'value2')}/></td></tr>
        <tr><td></td>
          <td><button onClick=${onclick}>Save values</button></td></tr>
      </table>
    </div>`
  }
 };
 const App = () => html`<div id="container">
  <${Info} />
  <${Dashboard} />
  <${Form} />
 </div>`;
 window.onload = () => render(h(App), document.body);
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 /* axios v0.21.1 | (c) 2020 by Matt Zabriskie */
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		`@@ -1,2 +0,0 @@`
			`# This "makefile" is only intended to prevent errors during main makefile execution`
			`all:`
		`@@ -1,2 +0,0 @@`
			`PROG = big_upload`
			`include ../examples.mk`
		`@@ -0,0 +1 @@`
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