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我正在尝试创建一个简单的多浏览器聊天 Web 应用程序。我以为我完成了它的创作。但是当我尝试运行它时，我得到 500 状态和

Internal Server Error

The server encountered an internal error and was unable to complete your request. Either the server is overloaded or there is an error in the application.

不太确定为什么会发生这种情况。我正在 Flask 中做这个项目，我目前正在同时学习。因为我目前正在学习 Flask 和 Flask-socketio 和 websockets。

闲聊.py：

from gevent import monkey
# Do all of the default monkey patching (calls every other function in this module.
monkey.patch_all()

from threading import Thread
from flask import Flask, render_template
from flask.ext.socketio import SocketIO, emit
from time import strftime

app = Flask(__name__)
app.config['SECRET_KEY'] = 'secret'
socketio = SocketIO(app)
thread = None


@app.route('/')
def index():
    global thread
    if thread is None:
        #thread = Thread(target=background_thread)
        thread.start()
    return render_template('index.html')

# handle messages
@socketio.on('send message')
def handle_message(message):
    #msg = strftime("%H:%M:%S") + ': ' + str(message)
    emit('response', 
            {'data': strftime("%H:%M:%S") + ': ' + message['data']}, 
            broadcast = True)

@socketio.on('connect')
def conn():
    emit('response', {'data': 'Connected'})

if __name__ == '__main__':
    socketio.run(app)

索引.html：

    <html>
    <!-- jQuery and socket.io -->
    <script type="text/javascript" src="https://code.jquery.com/jquery-1.4.2.min.js"></script>
    <script type="text/javascript" src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/0.9.16/socket.io.min.js"></script>
    <script type="text/javascript">
        $(document).ready(function() {

            var socket = io.connect('https://' + document.domain + ':' + location.port);

            socket.on('connect', function() {
                socket.emit('', {data: 'I\'m connected!'});
            });

            socket.on('response', function(msg) {
                $('#log').append(msg.data);
            });

            $('form#broadcast').submit(function() {
                socket.emit('send message', { data: $('#msg').val()});
            })

        })
    </script>

    <form id="broadcast" method="POST">
        <input type="text" name="message" id="msg" placeholder="Enter message here...">
        <input type="submit" value="Send">
    </form>

    <h2>Chat</h2>
    <div id="log"></div>

</html>
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