Add mongoose-based http example

regression/apps/mongoose/http_server.c

@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: MPL-2.0
+
+#include <signal.h>
+#include <stdlib.h>
+#include <time.h>
+#include "mongoose.h"
+
+static int s_debug_level = MG_LL_INFO;
+static const char *s_listening_address = "http://127.0.0.1:8080/";
+
+static int s_signo;
+static void signal_handler(int signo)
+{
+	s_signo = signo;
+}
+
+// Event handler for the listening connection.
+static void cb(struct mg_connection *c, int ev, void *ev_data)
+{
+	if (ev == MG_EV_HTTP_MSG) {
+		struct mg_http_message *hm = ev_data;
+		if (mg_match(hm->uri, mg_str("/"), NULL)) {
+			// Generate a random number
+			srand(time(NULL));
+			int random_number = rand();
+			char response[100];
+			sprintf(response, "Random number: %d\n", random_number);
+			MG_INFO(("Send a random number : %d", random_number));
+			mg_http_reply(c, 200, "", "%s", response);
+		} else {
+			// Serve 404 for other routes
+			mg_http_reply(c, 404, "", "Not found");
+		}
+		// Remove this line if you need a long running server
+		// signal_handler(SIGTERM);
+	}
+}
+
+int main(int argc, char *argv[])
+{
+	struct mg_mgr mgr;
+	struct mg_connection *c;
+
+	// Parse command-line flags
+	for (int i = 1; i < argc; i++) {
+		if (strcmp(argv[i], "-l") == 0) {
+			s_listening_address = argv[++i];
+		} else if (strcmp(argv[i], "-v") == 0) {
+			s_debug_level = atoi(argv[++i]);
+		}
+	}
+
+	// Initialise stuff
+	signal(SIGINT, signal_handler);
+	signal(SIGTERM, signal_handler);
+	mg_log_set(s_debug_level);
+	mg_mgr_init(&mgr);
+	if ((c = mg_http_listen(&mgr, s_listening_address, cb, &mgr)) == NULL) {
+		MG_ERROR(("Cannot listen on %s. Use http://ADDR:PORT or :PORT",
+			  s_listening_address));
+		exit(EXIT_FAILURE);
+	}
+
+	// Start infinite event loop
+	MG_INFO(("Mongoose version : v%s", MG_VERSION));
+	MG_INFO(("Listening on     : %s", s_listening_address));
+	while (s_signo == 0)
+		mg_mgr_poll(&mgr, 1000);
+	mg_mgr_free(&mgr);
+	MG_INFO(("Exiting on signal %d", s_signo));
+	return 0;
+}