Proof of concept browser + embedded web server communicating via XMLHttpRequest.

Compile with "gcc -Wall `pkg-config --cflags --libs gtk+-2.0 webkit-1.0 libmicrohttpd` -o launcher main.c server.c"
Requires GTK, libwebkit and libmicrohttpd.

OpenRA.Launcher.Gtk/bridge.js

@@ -0,0 +1,27 @@
+window.external=new Object();
+window.external.do_ajax=function(uri)
+{
+    request = new XMLHttpRequest();
+    request.open("GET", uri, false);
+    try
+    {
+	request.send(null);
+    }
+    catch(err)
+    {
+    }
+    return request.responseText;
+};
+window.external.log=function(msg)
+{
+    window.external.do_ajax("http://localhost:48764/log?msg=" + escape(msg));
+};
+window.external.launchMod=function(mod)
+{
+    window.external.do_ajax("http://localhost:48764/launch?mod=" + mod);
+};
+window.external.existsInMod=function(file, mod)
+{
+
+    return window.external.do_ajax("http://localhost:48764/fileExists?mod=" + mod + "&file=" + escape(file));
+};

OpenRA.Launcher.Gtk/main.c

@@ -1,42 +1,96 @@
+/*
+ * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see LICENSE.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
 #include <gtk/gtk.h>
 #include <webkit/webkit.h>
 
+#include "server.h"
+
 GtkWindow * window;
 WebKitWebView * browser;
 
 gboolean window_delete(GtkWidget * widget, GdkEvent * event, gpointer user_data)
 {
+  server_teardown();
   gtk_main_quit();
-  return TRUE;
+  return FALSE;
 }
 
-int get_file_uri(char const * filepath, char * uri)
+int get_file_uri(char const * filepath, char ** uri)
 {
-  FILE * stdout;
+  FILE * output;
   char buffer[1024];
+  size_t buffer_len;
 
   sprintf(buffer, "readlink -f %s", filepath);
 
-  stdout = popen(buffer, "r");
+  output = popen(buffer, "r");
 
-  if (!stdout)
+  if (!output)
   {
-    printf("Could not find absolute path for %s", filepath);
+    g_warning("Could not find absolute path for %s", filepath);
     return FALSE;
   }
 
-  fgets(buffer, sizeof(buffer), stdout);
+  fgets(buffer, sizeof(buffer), output);
 
-  pclose(stdout);
+  pclose(output);
 
-  sprintf(uri, "file://%s", buffer);
+  buffer_len = strlen(buffer);
+  buffer[buffer_len - 1] = '\0';
 
+  *uri = g_filename_to_uri(buffer, NULL, NULL);
+
+  if (!*uri)
+  {
+    g_warning("Could not convert %s to URI", buffer);
+    return FALSE;
+  }
+
+  return TRUE;
+}
+
+int get_bridge_script(char ** script)
+{
+  FILE * f;
+  long fileSize;
+  char * buffer;
+  size_t result;
+
+  f = fopen("bridge.js", "r");
+
+  if (!f) 
+  { 
+    g_critical("Could not open bridge.js"); 
+    return FALSE; 
+  }
+
+  fseek(f, 0, SEEK_END);
+  fileSize = ftell(f);
+  rewind(f);
+
+  buffer = (char *) malloc(sizeof(char) * fileSize);
+  result = fread(buffer, 1, fileSize, f);
+
+  fclose(f);
+
+  *script = buffer;
   return TRUE;
 }
 
 int main(int argc, char ** argv)
 {
-  char uri[1024];
+  char * uri, * script;
+  
+  server_init(48764);
+  
   gtk_init(&argc, &argv);
 
   window = GTK_WINDOW(gtk_window_new(GTK_WINDOW_TOPLEVEL));
@@ -47,10 +101,22 @@ int main(int argc, char ** argv)
 
   gtk_container_add(GTK_CONTAINER(window), GTK_WIDGET(browser));
 
-  get_file_uri("../mods/cnc/mod.html", uri);
+  if (!get_bridge_script(&script))
+    return 1;
+
+  webkit_web_view_execute_script(browser, script);
+
+  free(script);
+
+  if (!get_file_uri("../mods/cnc/mod.html", &uri))
+  {
+    return 1;
+  }
 
   webkit_web_view_load_uri(browser, uri);
 
+  free(uri);
+
   gtk_widget_show_all(GTK_WIDGET(window));
   g_signal_connect(window, "delete-event", G_CALLBACK(window_delete), 0);
   

OpenRA.Launcher.Gtk/server.c

@@ -0,0 +1,79 @@
+/*
+ * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see LICENSE.
+ */
+#include <stdio.h>
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <unistd.h>
+#include <stdint.h>
+#include <string.h>
+#define MHD_PLATFORM_H
+#include <microhttpd.h>
+
+#include <glib.h>
+
+struct MHD_Daemon * server;
+
+int http_get_args(void * cls, enum MHD_ValueKind kind, 
+		  const char * key, const char * value)
+{
+  g_message("%s: %s", key, value);
+  return MHD_YES;
+}
+
+int access_handler_callback(void * userdata, 
+			    struct MHD_Connection * connection,
+			    const char * url,
+			    const char * method,
+			    const char * version,
+			    const char * upload_data,
+			    size_t * upload_data_size,
+			    void ** userpointer)
+{
+  struct MHD_Response * response;
+  int ret;
+  char * text = "1";
+  g_message(url);
+  
+  MHD_get_connection_values(connection, MHD_GET_ARGUMENT_KIND, 
+			    &http_get_args, NULL);
+  
+  response = MHD_create_response_from_data(strlen(text), (void *)text,
+					   MHD_NO, MHD_NO);
+
+  ret = MHD_queue_response(connection, MHD_HTTP_OK, response);
+  MHD_destroy_response(response);
+  
+  return ret;
+}
+
+int server_init(int port)
+{
+  server = MHD_start_daemon(MHD_USE_DEBUG | MHD_USE_SELECT_INTERNALLY,
+			    port, NULL, NULL, 
+			    &access_handler_callback, NULL,
+			    MHD_OPTION_END);
+
+  if (!server)
+  {
+    g_critical("Could not start web server.");
+    return 0;
+  }
+  g_message("Server initialised.");
+  return 1;
+}
+
+void * server_get_daemon(void)
+{
+  return server;
+}
+
+void server_teardown(void)
+{
+  MHD_stop_daemon(server);
+}

OpenRA.Launcher.Gtk/server.h

@@ -0,0 +1,10 @@
+/*
+ * Copyright 2007-2010 The OpenRA Developers (see AUTHORS)
+ * This file is part of OpenRA, which is free software. It is made 
+ * available to you under the terms of the GNU General Public License
+ * as published by the Free Software Foundation. For more information,
+ * see LICENSE.
+ */
+
+int server_init(int);
+void server_teardown(void);