12

我正在尝试使用Kenneth reitz 的Flask-Sockets 库来编写一个简单的 websocket 接口/服务器。这是我到目前为止所拥有的。

from flask import Flask
from flask_sockets import Sockets

app = Flask(__name__)
sockets = Sockets(app)

@sockets.route('/echo')
def echo_socket(ws):

    while True:
        message = ws.receive()
        ws.send(message)


@app.route('/')
def hello():
    return \
'''
<html>

    <head>
        <title>Admin</title>

        <script type="text/javascript">
            var ws = new WebSocket("ws://" + location.host + "/echo");
            ws.onmessage = function(evt){ 
                    var received_msg = evt.data;
                    alert(received_msg);
            };

            ws.onopen = function(){
                ws.send("hello john");
            };
        </script>

    </head>

    <body>
        <p>hello world</p>
    </body>

</html>
'''

if __name__ == "__main__":

    app.run(debug=True)

我期望发生的是当我转到默认烧瓶页面时,http://localhost:5000在我的情况下,我会看到一个带有文本的警告框hello john,但是我得到一个 Firefox 错误。错误是Firefox can't establish a connection to the server at ws://localhost:5000/echo。如何hello john通过向 Web 服务器发送消息然后回显回复来显示在警报框中?

4

1 回答 1

6

使用 gevent-websocket(参见gevent-websocket 用法):

if __name__ == "__main__":
    from gevent import pywsgi
    from geventwebsocket.handler import WebSocketHandler
    server = pywsgi.WSGIServer(('', 5000), app, handler_class=WebSocketHandler)
    server.serve_forever()

或者使用 gunicorn 运行服务器(参见Flask-Sockets Deployment):

gunicorn -k flask_sockets.worker module_name:app
于 2013-11-11T07:53:20.623 回答