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?