Joh*_*ohn 11 javascript python websocket flask flask-sockets
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)
我期待发生的是当我进入默认的烧瓶页面时,http://localhost:5000在我的情况下,我会看到一个包含文本的警告框hello john,但是我得到了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在警报框中显示？
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(请参阅Flask-Sockets部署):
gunicorn -k flask_sockets.worker module_name:app
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