Added http client example

examples/http_client/Makefile

+# Copyright (c) 2014 Cesanta Software
+# All rights reserved
+
+CFLAGS = -W -Wall -I../.. -g -O0 $(CFLAGS_EXTRA)
+SOURCES = http_client.c ../../mongoose.c
+PROG = http_client
+
+unix: $(SOURCES)
+	$(CC) -o $(PROG) $(SOURCES) $(CFLAGS)
+
+clean:
+	rm -rf $(PROG) *.exe *.dSYM *.obj *.exp .*o *.lib

examples/http_client/http_client.c

+// Copyright (c) 2014 Cesanta Software
+// All rights reserved
+//
+// This example demostrates how to connect to the remote Web server,
+// download data, process it and send back a reply.
+
+#include <signal.h>
+#include <stdlib.h>
+
+#include "mongoose.h"
+
+static int s_received_signal = 0;
+static struct mg_server *s_server = NULL;
+static const char *s_remote_host = "glosbe.com";
+static int s_remote_port = 80;
+
+static void signal_handler(int sig_num) {
+  signal(sig_num, signal_handler);
+  s_received_signal = sig_num;
+}
+
+static int ev_handler(struct mg_connection *conn, enum mg_event ev) {
+  struct mg_connection *client, *orig;
+
+  switch (ev) {
+    case MG_AUTH:
+      return MG_TRUE;
+
+    case MG_CONNECT:
+      // Send request to the remote host.
+      // TODO(lsm): handle connect error here.
+      mg_printf(conn, "GET %s HTTP/1.0\r\nHost: %s\r\n\r\n",
+                "/gapi/translate?from=eng&dest=fra&format=json&phrase=cat",
+                s_remote_host);
+      return MG_TRUE;
+
+    case MG_REPLY:
+      // Send reply to the original connection
+      orig = (struct mg_connection *) conn->connection_param;
+      mg_send_header(orig, "Content-Type", "text/plain");
+      mg_send_data(orig, conn->content, conn->content_len);
+      mg_send_data(orig, "", 0);  // Last chunk: mark the end of reply
+
+      // Disconnect connections
+      orig->connection_param = NULL;
+      conn->connection_param = NULL;
+      return MG_TRUE;
+
+    case MG_REQUEST:
+      if ((client = mg_connect(s_server, s_remote_host, s_remote_port, 0)) != NULL) {
+        // Interconnect requests
+        client->connection_param = conn;
+        conn->connection_param = client;
+        return MG_MORE;
+      } else {
+        mg_printf_data(conn, "%s", "cannot send API request");
+        return MG_TRUE;
+      }
+
+    default:
+      return MG_FALSE;
+  }
+}
+
+int main(void) {
+  s_server = mg_create_server(NULL, ev_handler);
+
+  mg_set_option(s_server, "listening_port", "8080");
+
+  // Setup signal handlers
+  signal(SIGTERM, signal_handler);
+  signal(SIGINT, signal_handler);
+
+  printf("Listening on port %s\n", mg_get_option(s_server, "listening_port"));
+  while (s_received_signal == 0) {
+    mg_poll_server(s_server, 1000);
+  }
+  mg_destroy_server(&s_server);
+  printf("Existing on signal %d\n", s_received_signal);
+
+  return EXIT_SUCCESS;
+}