public async Task <HttpResponseMessage> Connect(string nickName)
{
if (string.IsNullOrEmpty(nickName))
{
throw new HttpResponseException(HttpStatusCode.BadRequest);
}
WebSocketHandler webSocketHandler = new WebSocketHandler();
// Handle the case where client forgot to close connection last time
if (handlers.ContainsKey(nickName))
{
WebSocketHandler origHandler = handlers[nickName];
handlers.Remove(nickName);
try
{
await origHandler.Close();
}
catch
{
// unexcepted error when trying to close the previous websocket
}
}
handlers[nickName] = webSocketHandler;
string conversationId = string.Empty;
string watermark = null;
webSocketHandler.OnOpened += ((sender, arg) =>
{
Conversation conversation = this.directLineClient.Conversations.StartConversation();
conversationId = conversation.ConversationId;
});
webSocketHandler.OnTextMessageReceived += (async(sender, message) =>
{
// Do nothing with heartbeat message
// Send text message to bot service for non-heartbeat message
if (!string.Equals(message, "heartbeat", StringComparison.OrdinalIgnoreCase))
{
await OnTextMessageReceived(webSocketHandler, message, conversationId, watermark);
}
});
webSocketHandler.OnBinaryMessageReceived += (async(sender, bytes) =>
{
await OnBinaryMessageReceived(webSocketHandler, bytes, conversationId, watermark);
});
webSocketHandler.OnClosed += (sender, arg) =>
{
handlers.Remove(nickName);
};
HttpContext.Current.AcceptWebSocketRequest(webSocketHandler);
return(Request.CreateResponse(HttpStatusCode.SwitchingProtocols));
}
