7.0 refactor

examples/video-stream/Makefile

@@ -0,0 +1,10 @@
+PROG ?= example
+
+all: $(PROG)
+	$(DEBUGGER) ./$(PROG)
+
+$(PROG):
+	$(CC) ../../mongoose.c -I../.. $(CFLAGS) $(EXTRA) -o $(PROG) main.c
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb log.txt

examples/video-stream/main.c

@@ -0,0 +1,66 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+
+// HTTP request handler function. It implements the following endpoints:
+//   /api/video1 - hangs forever, returns MJPEG video stream
+//   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/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 {
+      mg_http_serve_dir(c, ev_data, "web_root");
+    }
+  }
+}
+
+// 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 timer_callback(void *arg) {
+  broadcast_mjpeg_frame(arg);
+}
+
+int main(void) {
+  struct mg_mgr mgr;
+  struct mg_timer t1;
+
+  mg_mgr_init(&mgr);
+  mg_http_listen(&mgr, "http://localhost:8000", cb, NULL);
+  mg_timer_init(&t1, 500, MG_TIMER_REPEAT, timer_callback, &mgr);
+  for (;;) mg_mgr_poll(&mgr, 50);
+  mg_timer_free(&t1);
+  mg_mgr_free(&mgr);
+
+  return 0;
+}

examples/video-stream/web_root/index.html

@@ -0,0 +1,27 @@
+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <title>example</title>
+    <meta charset="utf-8" />
+    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <style>
+      #container { margin-right: auto; margin-left: auto; max-width: 480px; }
+      #info { background: #e0f0f0; border-radius: .5em; padding: 2em;  }
+      img { width: 100%; margin-top: 1em; border: 1px solid #ccc; }
+
+    </style>
+  </head>
+  <body>
+    <div id="container">
+      <div id="info">
+        A div below shows live MJPEG video stream from the server, which
+        is simulated by reading files from the images/ directory.
+        <br/><br/>
+        You can also use <code>curl</code> command-line utility:
+        <br/><code>curl localhost:8000/api/video1</code>
+      </div>
+      <img src="/api/video1" />
+    </div>
+  </body>
+</html>