我试图使用
Kenneth reitz’s 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.
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进入默认烧瓶页面,在我的情况下,http：// localhost：5000,我会看到一个警告框与文本hello john,而是我得到一个Firefox错误.错误是Firefox无法建立到ws：// localhost：5000 / echo的服务器的连接.通过向Web服务器发送消息,然后回复该回复,我如何在警报框中显示hello john？
解决方法
使用gevent-websocket(见
gevent-websocket usage)：
if __name__ == "__main__":
from gevent import pywsgi
from geventwebsocket.handler import WebSocketHandler
server = pywsgi.WsgiServer(('',5000),app,handler_class=WebSocketHandler)
server.serve_forever()
或使用爆米花运行服务器(请参阅Flask-Sockets Deployment)：
gunicorn -k flask_sockets.worker module_name:app