private void OpenConnection(Connection connection, string data, Action initializeCallback, Action<Exception> errorCallback)
{
// If we're reconnecting add /connect to the url
bool reconnect = initializeCallback == null;
var url = (reconnect ? connection.Url : connection.Url + "connect") + GetReceiveQueryString(connection, data);
Action<HttpWebRequest> prepareRequest = PrepareRequest(connection);
HttpHelper.GetAsync(url, request =>
{
prepareRequest(request);
request.Accept = "text/event-stream";
}).ContinueWith(task =>
{
if (task.IsFaulted)
{
var exception = task.Exception.GetBaseException();
if (!IsRequestAborted(exception) &&
Interlocked.CompareExchange(ref connection._initializedCalled, 0, 0) == 0)
{
if (errorCallback != null)
{
errorCallback(exception);
}
else
{
// Raise the error event if we failed to reconnect
connection.OnError(exception);
}
}
}
else
{
// Get the reseponse stream and read it for messages
var stream = task.Result.GetResponseStream();
var reader = new AsyncStreamReader(stream,
connection,
() =>
{
if (Interlocked.CompareExchange(ref connection._initializedCalled, 1, 0) == 0)
{
initializeCallback();
}
},
() =>
{
// Wait for a bit before reconnecting
Thread.Sleep(ReconnectDelay);
// Now attempt a reconnect
OpenConnection(connection, data, initializeCallback: null, errorCallback: null);
});
reader.StartReading();
// Set the reader for this connection
connection.Items[ReaderKey] = reader;
}
});
if (initializeCallback != null)
{
TaskAsyncHelper.Delay(ConnectionTimeout).Then(() =>
{
if (Interlocked.CompareExchange(ref connection._initializedCalled, 1, 0) == 0)
{
// Stop the connection
Stop(connection);
// Connection timeout occured
errorCallback(new TimeoutException());
}
});
}
}
