chat

基于express、socket.io搭建的一个简易的聊天室

demo

遇到的坑

环境

centOS7.2 + nginx1.14.2 + node10.15.0 + npm6.4.1

报错400

返回结果

{
  code: 1,
  message: "Session ID unknown"
}

解决方法：
客户端发起socket连接请求时，仅使用**websocket**模式

var socket = io({
  "transports": ['websocket']
  // "transports": ['websocket', 'polling']
});

上面问题解决后，还是会报错WebSocket connection to 'ws://chat.watasi.cn/socket.io/?EIO=3&transport=websocket' failed: Error during WebSocket handshake: Unexpected response code: 400，这时候就需要配置nginx了。

nginx配置

cd /usr/local/nginx/conf/vhost
vim chat.watasi.cn.conf

初始配置为

server {
  listen      80;
  server_name chat.watasi.cn;

  location / {
      proxy_set_header X-Real-IP $remote_addr;
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_set_header X-Nginx-Proxy true;
      proxy_set_header Connection "";
      proxy_set_header Origin "";
      proxy_pass http://chat;
  }
}

新增以下配置

server {
  
  # 其他配置

  location /socket.io/ {
    # 此处改为 socket.io 后端的 ip 和端口即可
    proxy_pass http://127.0.0.1:3000;

    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_http_version 1.1;
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header Host $host;
  }
}

pm2 start app.js --name="chat" -i 4

会出现无法正常进入房间问题

pm2 start app.js --name="caht"