Question

我正在测试socketio以构建具有多个渠道的小型聊天应用程序。我设法将数据从客户端发送到服务器。服务器正在发送回已创建通道的消息。但是，我的客户未收到该消息。有想法吗？

客户端代码：除了两个事件“ channel_already_exists”和“ channel_created”之外，其他一切都运行良好。服务器正在发送这些事件，但是客户端似乎没有收到它们，因为我的控制台中什么也没有。

document.addEventListener('DOMContentLoaded', () => {

  // Connect to websocket
  var socket = io.connect(location.protocol + '//' + document.domain + ':' + location.port);

  // When connected, the user can register his username
  socket.on('connect', () => {

    document.getElementById('new_channel').hidden = true;

    if (localStorage.username) {
      socket.emit('register', {'username': localStorage.username});
    } else {
        document.getElementById('registration').onsubmit = () => {
          const username = document.getElementById('username').value;
          localStorage.setItem('username', username);
          socket.emit('register', {'username': username});
        };
    }
  });

  socket.on('registered', () => {
    const username = localStorage.username;
    document.getElementById('registration').innerHTML = '';
    document.getElementById('new_channel').hidden = false;
    document.getElementById('welcome').innerHTML = `Welcome ${username}`;
  });

  document.getElementById('new_channel').onsubmit = () => {
    const channel_name = document.getElementById('channel_id').value;
    socket.emit('new_channel', {'channel_name': channel_name});
  };

  socket.on('channel_already_exists', () => {
    console.log('already exists');
    document.getElementById('channel_message').innerHTML = 'Channel already exists. Please select another name.';
  });

  socket.on('channel_created', channels => {
    console.log('channel created');
    document.getElementById('channel_message').innerHTML = 'Channel has been created.';
  });

});

FLask上的服务器代码：

import os
import requests

from flask import Flask, jsonify, render_template, request
from flask_socketio import SocketIO, emit

app = Flask(__name__)
app.config["SECRET_KEY"] = os.getenv("SECRET_KEY")
socketio = SocketIO(app)

users = set()
channels = {}

@app.route("/")
def index():
    not_registered = True
    return render_template("index.html")

#Register new user
@socketio.on("register")
def on_register(data):
    print("register")
    username = data["username"]
    users.add(username)
    emit("registered")

@socketio.on("new_channel")
def on_new_channel(data):
    print("new_channel")
    channel_name = data["channel_name"]
    if channel_name in channels:
        print("channel_already_exists")
        emit("channel_already_exists")
    else:
        #create a new empty channel
        print("new_channel_created")
        channels[channel_name] = ""
        emit('channel_created', channels)

我尝试创建新频道时（即提交“ new_channel”时）的客户端日志

engine.io-client:socket socket error {"type":"TransportError"} +5s
socket.io.min.js (2,5342)

socket.io-client:manager error +5s Error: xhr poll error

engine.io-client:socket socket close with reason: "transport error" +1ms
socket.io.min.js (2,5342)

engine.io-client:polling transport open - closing +1ms
socket.io.min.js (2,5342)

engine.io-client:polling writing close packet +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open POST: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762262046-2&sid=6108efcd5e754d6c9befdcf33af618ed +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data 1:1 +1ms
socket.io.min.js (2,5342)

socket.io-client:manager close +3ms
socket.io.min.js (1,13697)

socket.io-client:socket close (transport error) +5s
socket.io.min.js (1,13697)

socket.io-client:manager will wait 770ms before reconnect attempt +1ms
socket.io.min.js (1,13697)

socket.io-client:manager attempting reconnect +789ms
socket.io.min.js (1,13697)

socket.io-client:manager readyState closed +0ms
socket.io.min.js (1,13697)

socket.io-client:manager opening http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

engine.io-client:socket creating transport "polling" +791ms
socket.io.min.js (2,5342)

engine.io-client:polling polling +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762262840-3 +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +0ms

engine.io-client:socket setting transport polling +0ms
socket.io.min.js (2,5342)

socket.io-client:manager connect attempt will timeout after 20000 +2ms
socket.io.min.js (1,13697)

engine.io-client:socket socket error {"type":"TransportError"} +1s
socket.io.min.js (2,5342)

socket.io-client:manager connect_error +1s
socket.io.min.js (1,13697)

socket.io-client:manager reconnect attempt error +0ms
socket.io.min.js (1,13697)

socket.io-client:manager will wait 1902ms before reconnect attempt +1ms
socket.io.min.js (1,13697)

engine.io-client:socket socket close with reason: "transport error" +1ms
socket.io.min.js (2,5342)

engine.io-client:polling transport not open - deferring close +1ms
socket.io.min.js (2,5342)

socket.io-client:manager attempting reconnect +1s
socket.io.min.js (1,13697)

socket.io-client:manager readyState closed +0ms
socket.io.min.js (1,13697)

socket.io-client:manager opening http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

engine.io-client:socket creating transport "polling" +2s
socket.io.min.js (2,5342)

engine.io-client:polling polling +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762265792-4 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +1ms

engine.io-client:socket setting transport polling +0ms
socket.io.min.js (2,5342)

socket.io-client:manager connect attempt will timeout after 20000 +3ms
socket.io.min.js (1,13697)

engine.io-client:polling polling got data [object ArrayBuffer] +13ms

engine.io-client:socket socket receive: type "open", data "{"sid":"ca6c4332a9f347eab56882912b70a309","upgrades":[],"pingTimeout":60000,"pingInterval":25000}" +1ms
socket.io.min.js (2,5342)

engine.io-client:socket socket open +1ms
socket.io.min.js (2,5342)

socket.io-client:manager open +15ms
socket.io.min.js (1,13697)

socket.io-client:socket transport is open - connecting +3s
socket.io.min.js (1,13697)

socket.io-client:manager reconnect success +1ms
socket.io.min.js (1,13697)

engine.io-client:socket starting upgrade probes +1ms
socket.io.min.js (2,5342)

engine.io-client:socket socket receive: type "message", data "0" +0ms
socket.io.min.js (2,5342)

socket.io-parser decoded 0 as %j +8s [object Object]

connect
index.js (11,5)

engine.io-client:polling polling +2ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762265812-5&sid=ca6c4332a9f347eab56882912b70a309 +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +0ms

socket.io-client:manager writing packet %j +5s [object Object]

socket.io-parser encoding packet %j +5s [object Object]

socket.io-parser encoded %j as [object Object] +0ms 2["register",{"username":"goeland"}]

engine.io-client:socket flushing 1 packets in socket +5s
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open POST: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762271133-6&sid=ca6c4332a9f347eab56882912b70a309 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data 37:42["register",{"username":"goeland"}] +0ms
socket.io.min.js (2,5342)

HTML1300: Une navigation s’est produite.
127.0.0.1:5000 (1,1)

socket.io-client:url parse http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

socket.io-client new io instance for http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

socket.io-client:manager readyState closed +0ms
socket.io.min.js (1,13697)

socket.io-client:manager opening http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

engine.io-client:socket creating transport "polling" +0ms
socket.io.min.js (2,5342)

engine.io-client:polling polling +2ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762271323-0 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +0ms

engine.io-client:socket setting transport polling +1ms
socket.io.min.js (2,5342)

socket.io-client:manager connect attempt will timeout after 20000 +4ms
socket.io.min.js (1,13697)

socket.io-client:manager readyState opening +0ms
socket.io.min.js (1,13697)

engine.io-client:polling polling got data [object ArrayBuffer] +46ms

engine.io-client:socket socket receive: type "open", data "{"sid":"ccc77d7deda843fa8a846527cb19e4db","upgrades":[],"pingTimeout":60000,"pingInterval":25000}" +3ms
socket.io.min.js (2,5342)

engine.io-client:socket socket open +1ms
socket.io.min.js (2,5342)

socket.io-client:manager open +50ms
socket.io.min.js (1,13697)

socket.io-client:socket transport is open - connecting +0ms
socket.io.min.js (1,13697)

engine.io-client:socket starting upgrade probes +0ms
socket.io.min.js (2,5342)

engine.io-client:socket socket receive: type "message", data "0" +1ms
socket.io.min.js (2,5342)

socket.io-parser decoded 0 as %j +0ms [object Object]

connect
index.js (11,5)

socket.io-client:manager writing packet %j +3ms [object Object]

socket.io-parser encoding packet %j +1ms [object Object]

socket.io-parser encoded %j as [object Object] +0ms 2["register",{"username":"goeland"}]

engine.io-client:socket flushing 1 packets in socket +2ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open POST: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762271378-1&sid=ccc77d7deda843fa8a846527cb19e4db +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data 37:42["register",{"username":"goeland"}] +1ms
socket.io.min.js (2,5342)

engine.io-client:polling polling +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762271379-2&sid=ccc77d7deda843fa8a846527cb19e4db +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +0ms

engine.io-client:polling polling got data [object ArrayBuffer] +36ms

engine.io-client:socket socket receive: type "message", data "2["registered",null]" +2ms
socket.io.min.js (2,5342)

socket.io-parser decoded 2["registered",null] as %j +41ms [object Object]

socket.io-client:socket emitting event %j +44ms registered,

registered
index.js (26,5)

engine.io-client:polling polling +3ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762271422-3&sid=ccc77d7deda843fa8a846527cb19e4db +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +1ms

new_channel
index.js (34,5)

socket.io-client:manager writing packet %j +5s [object Object]

socket.io-parser encoding packet %j +5s [object Object]

socket.io-parser encoded %j as [object Object] +0ms 2["new_channel",{"channel_name":"channel 3"}]

engine.io-client:socket flushing 1 packets in socket +5s
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open POST: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762276888-4&sid=ccc77d7deda843fa8a846527cb19e4db +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data 46:42["new_channel",{"channel_name":"channel 3"}] +1ms
socket.io.min.js (2,5342)

HTML1300: Une navigation s’est produite.
127.0.0.1:5000 (1,1)

socket.io-client:url parse http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

socket.io-client new io instance for http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

socket.io-client:manager readyState closed +0ms
socket.io.min.js (1,13697)

socket.io-client:manager opening http://127.0.0.1:5000 +0ms
socket.io.min.js (1,13697)

engine.io-client:socket creating transport "polling" +0ms
socket.io.min.js (2,5342)

engine.io-client:polling polling +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762277050-0 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +1ms

engine.io-client:socket setting transport polling +0ms
socket.io.min.js (2,5342)

socket.io-client:manager connect attempt will timeout after 20000 +3ms
socket.io.min.js (1,13697)

socket.io-client:manager readyState opening +0ms
socket.io.min.js (1,13697)

0: Unable to get property 'SavePersonalAndPaymentData' of undefined or null reference
Autoformfill_ContentScript.js (1,1)

engine.io-client:polling polling got data [object ArrayBuffer] +43ms

engine.io-client:socket socket receive: type "open", data "{"sid":"0409f655ccc642f68322c4a9f64c3b66","upgrades":[],"pingTimeout":60000,"pingInterval":25000}" +2ms
socket.io.min.js (2,5342)

engine.io-client:socket socket open +0ms
socket.io.min.js (2,5342)

socket.io-client:manager open +46ms
socket.io.min.js (1,13697)

socket.io-client:socket transport is open - connecting +0ms
socket.io.min.js (1,13697)

engine.io-client:socket starting upgrade probes +1ms
socket.io.min.js (2,5342)

engine.io-client:socket socket receive: type "message", data "0" +0ms
socket.io.min.js (2,5342)

socket.io-parser decoded 0 as %j +0ms [object Object]

connect
index.js (11,5)

socket.io-client:manager writing packet %j +2ms [object Object]

socket.io-parser encoding packet %j +0ms [object Object]

socket.io-parser encoded %j as [object Object] +0ms 2["register",{"username":"goeland"}]

engine.io-client:socket flushing 1 packets in socket +2ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open POST: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762277100-1&sid=0409f655ccc642f68322c4a9f64c3b66 +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data 37:42["register",{"username":"goeland"}] +0ms
socket.io.min.js (2,5342)

engine.io-client:polling polling +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762277101-2&sid=0409f655ccc642f68322c4a9f64c3b66 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +0ms

engine.io-client:polling polling got data [object ArrayBuffer] +41ms

engine.io-client:socket socket receive: type "message", data "2["registered",null]" +2ms
socket.io.min.js (2,5342)

socket.io-parser decoded 2["registered",null] as %j +45ms [object Object]

socket.io-client:socket emitting event %j +47ms registered,

registered
index.js (26,5)

engine.io-client:polling polling +3ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762277148-3&sid=0409f655ccc642f68322c4a9f64c3b66 +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +1ms

engine.io-client:socket writing ping packet - expecting pong within 60000ms +25s
socket.io.min.js (2,5342)

engine.io-client:socket flushing 1 packets in socket +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open POST: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762302107-4&sid=0409f655ccc642f68322c4a9f64c3b66 +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data 1:2 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling polling got data [object ArrayBuffer] +17ms

engine.io-client:socket socket receive: type "pong", data "undefined" +1ms
socket.io.min.js (2,5342)

engine.io-client:polling polling +1ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr poll +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr open GET: http://127.0.0.1:5000/socket.io/?EIO=3&transport=polling&t=1574762302126-5&sid=0409f655ccc642f68322c4a9f64c3b66 +0ms
socket.io.min.js (2,5342)

engine.io-client:polling-xhr xhr data null +0ms

服务器日志：

C:\Users\rober\project2>flask run
 * Serving Flask app "application.py"
 * Environment: production
   WARNING: This is a development server. Do not use it in a production deployment.
   Use a production WSGI server instead.
 * Debug mode: off
[2019-11-26 10:57:44,233] WARNING in __init__: Flask-SocketIO is Running under Werkzeug, WebSocket is not available.
Server initialized for threading.
 * Running on http://127.0.0.1:5000/ (Press CTRL+C to quit)
Invalid session e0e081d67cbf4189b990c1dc103da589
127.0.0.1 - - [26/Nov/2019 10:57:44] "GET /socket.io/?EIO=3&transport=polling&t=1574762243279-331&sid=e0e081d67cbf4189b990c1dc103da589 HTTP/1.1" 400 -
f3cc277e7bec49c8b2eba1272d102a6c: Sending packet OPEN data {'sid': 'f3cc277e7bec49c8b2eba1272d102a6c', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
f3cc277e7bec49c8b2eba1272d102a6c: Sending packet MESSAGE data 0
127.0.0.1 - - [26/Nov/2019 10:57:44] "GET /socket.io/?EIO=3&transport=polling&t=1574762264065-380 HTTP/1.1" 200 -
f3cc277e7bec49c8b2eba1272d102a6c: Received packet MESSAGE data 2["register",{"username":"robert"}]
received event "register" from f3cc277e7bec49c8b2eba1272d102a6c [/]
register
127.0.0.1 - - [26/Nov/2019 10:57:44] "POST /socket.io/?EIO=3&transport=polling&t=1574762264385-381&sid=f3cc277e7bec49c8b2eba1272d102a6c HTTP/1.1" 200 -
emitting event "registered" to f3cc277e7bec49c8b2eba1272d102a6c [/]
f3cc277e7bec49c8b2eba1272d102a6c: Sending packet MESSAGE data 2["registered",null]
127.0.0.1 - - [26/Nov/2019 10:57:44] "GET /socket.io/?EIO=3&transport=polling&t=1574762264393-382&sid=f3cc277e7bec49c8b2eba1272d102a6c HTTP/1.1" 200 -
Invalid session e0e081d67cbf4189b990c1dc103da589
127.0.0.1 - - [26/Nov/2019 10:57:45] "POST /socket.io/?EIO=3&transport=polling&t=1574762265345-332&sid=e0e081d67cbf4189b990c1dc103da589 HTTP/1.1" 400 -
ca6c4332a9f347eab56882912b70a309: Sending packet OPEN data {'sid': 'ca6c4332a9f347eab56882912b70a309', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
ca6c4332a9f347eab56882912b70a309: Sending packet MESSAGE data 0
127.0.0.1 - - [26/Nov/2019 10:57:45] "GET /socket.io/?EIO=3&transport=polling&t=1574762265792-4 HTTP/1.1" 200 -
44e90573522c46f583a5811c21a2cf97: Sending packet OPEN data {'sid': '44e90573522c46f583a5811c21a2cf97', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
44e90573522c46f583a5811c21a2cf97: Sending packet MESSAGE data 0
127.0.0.1 - - [26/Nov/2019 10:57:47] "GET /socket.io/?EIO=3&transport=polling&t=1574762267360-333 HTTP/1.1" 200 -
44e90573522c46f583a5811c21a2cf97: Received packet MESSAGE data 2["register",{"username":"robert"}]
received event "register" from 44e90573522c46f583a5811c21a2cf97 [/]
register
127.0.0.1 - - [26/Nov/2019 10:57:48] "POST /socket.io/?EIO=3&transport=polling&t=1574762267414-334&sid=44e90573522c46f583a5811c21a2cf97 HTTP/1.1" 200 -
emitting event "registered" to 44e90573522c46f583a5811c21a2cf97 [/]
44e90573522c46f583a5811c21a2cf97: Sending packet MESSAGE data 2["registered",null]
127.0.0.1 - - [26/Nov/2019 10:57:48] "GET /socket.io/?EIO=3&transport=polling&t=1574762267420-335&sid=44e90573522c46f583a5811c21a2cf97 HTTP/1.1" 200 -
ca6c4332a9f347eab56882912b70a309: Received packet MESSAGE data 2["register",{"username":"goeland"}]
received event "register" from ca6c4332a9f347eab56882912b70a309 [/]
register
127.0.0.1 - - [26/Nov/2019 10:57:51] "POST /socket.io/?EIO=3&transport=polling&t=1574762271133-6&sid=ca6c4332a9f347eab56882912b70a309 HTTP/1.1" 200 -
emitting event "registered" to ca6c4332a9f347eab56882912b70a309 [/]
ca6c4332a9f347eab56882912b70a309: Sending packet MESSAGE data 2["registered",null]
127.0.0.1 - - [26/Nov/2019 10:57:51] "GET /socket.io/?EIO=3&transport=polling&t=1574762265812-5&sid=ca6c4332a9f347eab56882912b70a309 HTTP/1.1" 200 -
127.0.0.1 - - [26/Nov/2019 10:57:51] "GET / HTTP/1.1" 200 -
127.0.0.1 - - [26/Nov/2019 10:57:51] "GET /static/index.js HTTP/1.1" 200 -
ccc77d7deda843fa8a846527cb19e4db: Sending packet OPEN data {'sid': 'ccc77d7deda843fa8a846527cb19e4db', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
ccc77d7deda843fa8a846527cb19e4db: Sending packet MESSAGE data 0
127.0.0.1 - - [26/Nov/2019 10:57:51] "GET /socket.io/?EIO=3&transport=polling&t=1574762271323-0 HTTP/1.1" 200 -
ccc77d7deda843fa8a846527cb19e4db: Received packet MESSAGE data 2["register",{"username":"goeland"}]
received event "register" from ccc77d7deda843fa8a846527cb19e4db [/]
register
127.0.0.1 - - [26/Nov/2019 10:57:51] "POST /socket.io/?EIO=3&transport=polling&t=1574762271378-1&sid=ccc77d7deda843fa8a846527cb19e4db HTTP/1.1" 200 -
emitting event "registered" to ccc77d7deda843fa8a846527cb19e4db [/]
ccc77d7deda843fa8a846527cb19e4db: Sending packet MESSAGE data 2["registered",null]
127.0.0.1 - - [26/Nov/2019 10:57:51] "GET /socket.io/?EIO=3&transport=polling&t=1574762271379-2&sid=ccc77d7deda843fa8a846527cb19e4db HTTP/1.1" 200 -
ccc77d7deda843fa8a846527cb19e4db: Received packet MESSAGE data 2["new_channel",{"channel_name":"channel 3"}]
received event "new_channel" from ccc77d7deda843fa8a846527cb19e4db [/]
127.0.0.1 - - [26/Nov/2019 10:57:56] "GET / HTTP/1.1" 200 -
new_channel
127.0.0.1 - - [26/Nov/2019 10:57:56] "POST /socket.io/?EIO=3&transport=polling&t=1574762276888-4&sid=ccc77d7deda843fa8a846527cb19e4db HTTP/1.1" 200 -
{}
new_channel_created {}
emitting event "channel_created" to ccc77d7deda843fa8a846527cb19e4db [/]
ccc77d7deda843fa8a846527cb19e4db: Sending packet MESSAGE data 2["channel_created","channel 3"]
127.0.0.1 - - [26/Nov/2019 10:57:56] "GET /socket.io/?EIO=3&transport=polling&t=1574762271422-3&sid=ccc77d7deda843fa8a846527cb19e4db HTTP/1.1" 200 -
127.0.0.1 - - [26/Nov/2019 10:57:56] "GET /static/index.js HTTP/1.1" 200 -
0409f655ccc642f68322c4a9f64c3b66: Sending packet OPEN data {'sid': '0409f655ccc642f68322c4a9f64c3b66', 'upgrades': [], 'pingTimeout': 60000, 'pingInterval': 25000}
0409f655ccc642f68322c4a9f64c3b66: Sending packet MESSAGE data 0
127.0.0.1 - - [26/Nov/2019 10:57:57] "GET /socket.io/?EIO=3&transport=polling&t=1574762277050-0 HTTP/1.1" 200 -
0409f655ccc642f68322c4a9f64c3b66: Received packet MESSAGE data 2["register",{"username":"goeland"}]
received event "register" from 0409f655ccc642f68322c4a9f64c3b66 [/]
register
127.0.0.1 - - [26/Nov/2019 10:57:57] "POST /socket.io/?EIO=3&transport=polling&t=1574762277100-1&sid=0409f655ccc642f68322c4a9f64c3b66 HTTP/1.1" 200 -
emitting event "registered" to 0409f655ccc642f68322c4a9f64c3b66 [/]
0409f655ccc642f68322c4a9f64c3b66: Sending packet MESSAGE data 2["registered",null]
127.0.0.1 - - [26/Nov/2019 10:57:57] "GET /socket.io/?EIO=3&transport=polling&t=1574762277101-2&sid=0409f655ccc642f68322c4a9f64c3b66 HTTP/1.1" 200 -

Answer 1

根据所包含的日志，问题是由应用程序中的错误设计引起的。

客户端请求通过Web表单创建一个新频道。表单使用GET或POST请求提交数据，这将导致浏览器删除当前页面，然后重新加载表单提交请求的响应所附带的页面。当浏览器重新加载页面时，它将删除所有连接，包括Socket.IO链接。这就是为什么您的客户没有收到由于提交此表单而产生的消息的原因。

我的建议是将表单提交更改为使用AJAX，以便浏览器将其作为后台请求发送，而不会导致页面重新加载。

socketio：客户端未收到消息

1 个答案: