Question

我正在尝试在Python中设置socket.io服务器和在JavaScript中设置socket.io客户端。

我找到了与客户端服务器进行对话的JS客户端和与python服务器进行对话的python客户端的示例-但与python服务器进行对话的JS客户端没有示例。因此，我试图结合来自不同示例的代码。

客户端（由apache提供的html文件，托管在您想要的任何位置）

<script src="https://cdnjs.cloudflare.com/ajax/libs/socket.io/2.2.0/socket.io.js"></script>
<script>

socket = io.connect('http://localhost:5000');

socket.on('connect',function() {
  console.log('Client has connected to the server!');
});

socket.on('msg',function(data) {
  console.log('Received a message from the server!',data);
});

socket.on('disconnect',function() {
  console.log('The client has disconnected!');
});

// Sends a message to the server via sockets
function send(message) {
  socket.send('msg',message);
};

</script>

服务器：

import eventlet
import socketio

sio = socketio.Server()
# the index.html file hosted by eventlet is a dummy file
# it appears to be required to host some html file.. 
app = socketio.WSGIApp(sio, static_files={
    '/': {'content_type': 'text/html', 'filename': 'index.html'}
})

@sio.on('connect')
def connect(sid, environ):
    print('connect ', sid)

@sio.on('msg')
def message(sid, data):
    print('message ', data)

@sio.on('disconnect')
def disconnect(sid):
    print('disconnect ', sid)

if __name__ == '__main__':
    eventlet.wsgi.server(eventlet.listen(('', 5000)), app)

运行此设置时，我可以在Python终端中看到客户端如何尝试连接：

    disconnect  db71fa07154c45d4b6e6c80073d27e17
    127.0.0.1 - - [03/Feb/2019 17:28:04] "POST /socket.io/?EIO=3&transport=polling&t=MYqC39S&sid=4e1045977dd14223b0d2913752dd5cf1 HTTP/1.1" 400 233 0.000296
    127.0.0.1 - - [03/Feb/2019 17:28:04] "POST /socket.io/?EIO=3&transport=polling&t=MYqC39Z&sid=4e1045977dd14223b0d2913752dd5cf1 HTTP/1.1" 400 233 0.000201
    connect  8650c5c7f735492e84a6e8774a20b069
    127.0.0.1 - - [03/Feb/2019 17:28:05] "GET /socket.io/?EIO=3&transport=polling&t=MYqC3Q3 HTTP/1.1" 200 396 0.001240
    disconnect  8650c5c7f735492e84a6e8774a20b069
    127.0.0.1 - - [03/Feb/2019 17:29:05] "GET /socket.io/?EIO=3&transport=polling&t=MYqC3QC&sid=8650c5c7f735492e84a6e8774a20b069 HTTP/1.1" 400 233 60.005087
    (12281) accepted ('127.0.0.1', 46478)
    127.0.0.1 - - [03/Feb/2019 17:29:23] "GET /socket.io/?

在chrome中，我看到了客户端连接尝试：

index.js:83 POST http://localhost:5000/socket.io/?EIO=3&transport=polling&t=MYqDzXq&sid=d08f2f55533b43ea81bd2f98201de277 400 (BAD REQUEST)
    i.create @ index
    index.js:83 POST http://localhost:5000/socket.io/?EIO=3&transport=polling&t=MYqDzXz&sid=d08f2f55533b43ea81bd2f98201de277 400 (BAD REQUEST)
    i.create @ index.
    index.js:83 WebSocket connection to 'ws://localhost:5000/socket.io/?EIO=3&transport=websocket&sid=f23be764110d44cda684e633a990e0d7' failed: Error during WebSocket handshake: Unexpected response code: 400

他们似乎在交流-但出了点问题，因此连接从未完全建立。

Answer 1

发现了问题-我有两个正在运行的服务器实例。其中一台被作为后台线程触发并一直保持运行状态，所以我忘记了它……在同一端口上监听了两台服务器，这就是通信混乱的原因。

现在一切正常，因此该代码可用作python-JS socket.io通信的最小工作示例。

Answer 2

要从JS客户端脚本向服务器发送消息，必须使用“发射”而不是“发送”。

// Sends a message to the server via sockets
function send(message) {
  socket.emit('msg',message);
};

python服务器和javascript客户端的socket.io连接问题

2 个答案: