详解nginx websocket配置

$ yum install nodejs npm

npm install ws wscat

$ vim server.js
console.log("Server started");
var Msg = '';
var WebSocketServer = require('ws').Server
  , wss = new WebSocketServer({port: 8010});
  wss.on('connection', function(ws) {
    ws.on('message', function(message) {
    console.log('Received from client: %s', message);
    ws.send('Server received from client: ' + message);
  });
 });

$ node server.js
 Server started

$ netstat -tlunp|grep 8010
tcp6    0   0 :::8010         :::*          LISTEN   23864/nodejs

$ cd /root/node_modules/wscat/bin/
$ ./wscat --connect ws://127.0.0.1:8010
connected (press CTRL+C to quit)
> Hello
< Server received from client: Hello
> Welcome to www.hi-linux.com
< Server received from client: Welcome to www.hi-linux.com

yum -y install nginx

$ vim /usr/local/nginx/conf/nginx.conf
# 在http上下文中增加如下配置，确保Nginx能处理正常http请求。
http{
 map $http_upgrade $connection_upgrade {
  default upgrade;
  ''   close;
 }
 upstream websocket {
  #ip_hash;
  server localhost:8010; 
  server localhost:8011;
 }
# 以下配置是在server上下文中添加，location指用于websocket连接的path。
 server {
  listen    80;
  server_name localhost;
  access_log /var/log/nginx/yourdomain.log;
  location / {
   proxy_pass http://websocket;
   proxy_read_timeout 300s;
   proxy_set_header Host $host;
   proxy_set_header X-Real-IP $remote_addr;
   proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
   proxy_http_version 1.1;
   proxy_set_header Upgrade $http_upgrade;
   proxy_set_header Connection $connection_upgrade;
}
}
}

proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection $connection_upgrade;

Upgrade: websocket
Connection: Upgrade

HTTP/1.1 101 Switching Protocols
Upgrade: websocket
Connection: upgrade

/etc/init.d/nginx start

$ cd /root/node_modules/wscat/bin/
$ ./wscat --connect ws://192.168.2.210
connected (press CTRL+C to quit)
> Hello Nginx
< Server received from client: Hello Nginx
> Welcome to www.hi-linux.com
< Server received from client: Welcome to www.hi-linux.com