Add zephyr example skeleton

examples/zephyr/http-server/src/main.c

@@ -0,0 +1,83 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+
+static const char *s_debug_level = "3";
+static const char *s_root_dir = ".";
+static const char *s_listening_address = "http://0.0.0.0:8000";
+static time_t s_boot_timestamp = 0;
+static struct mg_connection *s_sntp_conn = NULL;
+
+// Event handler for the listening connection.
+// Simply serve static files from `s_root_dir`
+static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    mg_http_reply(c, 200, NULL, "hi\n");
+#if 0
+    struct mg_http_message *hm = ev_data, tmp = {0};
+    struct mg_str unknown = mg_str_n("?", 1), *cl;
+    struct mg_http_serve_opts opts = {0};
+    opts.root_dir = s_root_dir;
+    mg_http_serve_dir(c, hm, &opts);
+    mg_http_parse((char *) c->send.buf, c->send.len, &tmp);
+    cl = mg_http_get_header(&tmp, "Content-Length");
+    if (cl == NULL) cl = &unknown;
+    MG_INFO(("%.*s %.*s %.*s %.*s", (int) hm->method.len, hm->method.ptr,
+             (int) hm->uri.len, hm->uri.ptr, (int) tmp.uri.len, tmp.uri.ptr,
+             (int) cl->len, cl->ptr));
+#endif
+  } else if (ev == MG_EV_OPEN) {
+    c->is_hexdumping = 1;
+  }
+  (void) fn_data;
+}
+
+// We have no valid system time(), and we need it for TLS. Implement it
+time_t time(time_t *tp) {
+  time_t t = s_boot_timestamp + k_uptime_get() / 1000;
+  if (tp != NULL) *tp = t;
+  return t;
+}
+
+static void sfn(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_SNTP_TIME) {
+    int64_t t = *(int64_t *) ev_data;
+    MG_INFO(("Got SNTP time: %lld ms from epoch", t));
+    s_boot_timestamp = (time_t) ((t - mg_millis()) / 1000);
+  } else if (ev == MG_EV_CLOSE) {
+    s_sntp_conn = NULL;
+  }
+}
+
+static void timer_fn(void *arg) {
+  struct mg_mgr *mgr = (struct mg_mgr *) arg;
+  return;
+  if (s_sntp_conn == NULL) s_sntp_conn = mg_sntp_connect(mgr, NULL, sfn, NULL);
+  if (s_boot_timestamp < 9999) mg_sntp_send(s_sntp_conn, time(NULL));
+}
+
+static void logfn(const void *ptr, size_t len, void *userdata) {
+  printk("%.*s", (int) len, (char *) ptr);
+}
+
+int main(int argc, char *argv[]) {
+  struct mg_mgr mgr;
+
+  mg_log_set(s_debug_level);
+  mg_log_set_callback(logfn, NULL);
+
+  mg_mgr_init(&mgr);
+  mg_http_listen(&mgr, s_listening_address, cb, &mgr);
+
+  struct mg_timer t;
+  mg_timer_init(&t, 5000, MG_TIMER_REPEAT | MG_TIMER_RUN_NOW, timer_fn, &mgr);
+
+  // Start infinite event loop
+  MG_INFO(("Mongoose version : v%s", MG_VERSION));
+  MG_INFO(("Listening on     : %s", s_listening_address));
+  MG_INFO(("Web root         : [%s]", s_root_dir));
+  for (;;) mg_mgr_poll(&mgr, 1000);
+  mg_mgr_free(&mgr);
+  return 0;
+}