private void HttpRun()
{
http_listener = new HttpListener();
string prefix = null;
int port = 4000;
bool success = false;
string host = "localhost";
if (enable_network_svc)
{
host = "*";
}
do
{
prefix = String.Format("http://{0}:{1}/", host, port);
success = true;
try {
http_listener.Prefixes.Add(prefix);
http_listener.Start();
} catch (SocketException) {
http_listener.Prefixes.Remove(prefix);
success = false;
port++;
}
} while (!success);
Shutdown.WorkerStart(this.http_listener, String.Format("HTTP Server '{0}'", prefix));
Log.Always("HTTP Server: Listening on {0}", prefix);
while (this.running)
{
HttpListenerContext context = null;
try {
context = http_listener.GetContext();
} catch (Exception e) {
// Log a warning if not due to shutdown
if (!this.running ||
(!this.enable_network_svc && !this.webinterface))
{
break;
}
Logger.Log.Warn(e, "HTTP Server: Exception while getting context:");
}
if (context == null)
{
continue;
}
if (context.Request.HttpMethod == "GET")
{
try {
WebServer.HandleStaticPages(context);
} catch (IOException ex1) {
// Socket was shut down
Log.Debug("Exception while serving static page: " + ex1.Message);
// FIXME: Should anything be done here to free "context" ? This context seems to remain in http_listener's ctxt table
} catch (SocketException ex2) {
// Socket is not connected anymore
Log.Debug("Exception while serving static page: " + ex2.Message);
}
continue;
}
if (context.Request.HttpMethod != "POST")
{
// FIXME: Send better HTTP error ?
context.Response.StatusCode = 404;
context.Response.Close();
continue;
}
if (context.Request.RawUrl == "/")
{
// We have received a new query request
Guid guid = Guid.NewGuid();
HttpItemHandler item_handler = new HttpItemHandler();
item_handlers [guid] = item_handler;
ConnectionHandler handler = new HttpConnectionHandler(guid, context, item_handler);
lock (live_handlers)
live_handlers [handler] = handler;
ExceptionHandlingThread.Start(new ThreadStart(handler.HandleConnection));
}
else
{
// We have received a hit request
Uri uri = context.Request.Url;
string path = null;
// Second Uri segment contains the Guid
string g = uri.Segments [1];
if (g [g.Length - 1] == '/')
{
g = g.Remove(g.Length - 1, 1);
}
Guid guid = Guid.Empty;
try {
guid = new Guid(g);
} catch (FormatException) {
// FIXME: return HTTP error
Logger.Log.Debug("HTTP Server: Invalid query guid '{0}'", g);
context.Response.Close();
continue;
}
if (uri.Query.Length > 0)
{
path = uri.Query.Remove(0, 1);
}
else
{
// FIXME: return HTTP error
Logger.Log.Debug("HTTP Server: Empty query string in item request");
context.Response.Close();
continue;
}
System.Uri item_uri = new Uri(path);
HttpItemHandler handler = (HttpItemHandler)item_handlers [guid];
if (handler == null)
{
// FIXME: return HTTP error
Logger.Log.Debug("HTTP Server: Query ({0}) does not exist", g);
context.Response.Close();
}
else
{
Logger.Log.Debug("HTTP Server: Asked for item '{0}' on query '{1}'", path, g);
handler.HandleRequest(context, item_uri);
}
}
}
Shutdown.WorkerFinished(http_listener);
Logger.Log.Info("HTTP Server: '{0}' shut down...", prefix);
http_listener = null;
}