Question

我正在写一个web应用程序，我想通过SSL在Tornado WebSockets上从客户端向服务器端发送JSON-Code。当我想建立连接时，Google Chrome会在控制台日志中显示错误：

Uncaught InvalidStateError: Failed to execute 'send' on 'WebSocket': Still in CONNECTING State.

我的python服务器如下所示：

from tornado import websocket, web, ioloop
import json
from sqlite3functions import *


class SocketHandler(websocket.WebSocketHandler):
    def on_message(self, message):
        handleRequest(self, json.loads(message), True)
        print(message)

    def handleRequest(obj, message, isWebsock):
        ...


    def writeResponse(obj, message, isWebsock):
        if (isWebsock):
            obj.write_message(message)
        else:
            print(message)
            obj.write(message)
            print('msg sent')

app = web.Application([
  (r'/w', SocketHandler)
])

if __name__ == "__main__":
  app.listen(8888)
  ioloop.IOLoop.instance().start()

我的客户：

var ws;

function connect() {
 ws = new WebSocket('wss://127.0.0.1:8888/w');
 ws.onopen = function()
 {
   ws.send("Message to send");

 };                     
}


$(document).ready(function() {  
    connect();

    $("#Button").on('click', function() {
        ...      
        ws.send(data);
    });
});

由于

Answer 1

在连接就绪状态之前，不要让套接字发送数据。

这些功能可能有所帮助：

function sendMessage(msg) {
        waitForSocketConnection(nvWS, function() {
            ws.send(msg);
        });
    };


function waitForSocketConnection(socket, callback){
        setTimeout(
            function(){
                if (socket.readyState === 1) {
                    if(callback !== undefined){
                        callback();
                    }
                    return;
                } else {
                    waitForSocketConnection(socket,callback);
                }
            }, 5);
    };

Tornado WebSockets - InvalidStateError“仍处于连接状态”

1 个答案: