nginx 支持websocket

nginx 反向代理websocket 

nginx配置

請求地址及路徑：ws://x.x.x.x/web/springws/websocket.ws

解析 map 指令

上面 nginx.conf 配置中的 map $http_upgrade $connection_upgrade 的作用，參考 http://www.ttlsa.com/nginx/using-nginx-map-method/

該作用主要是根據客戶端請求中 $http_upgrade 的值，來構造改變 $connection_upgrade 的值，即根據變量 $http_upgrade 的值創建新的變量 $connection_upgrade，創建的規則就是 {} 里面的東西，請見配置：

http{

    # websocket
    map $http_upgrade $connection_upgrade {
        default upgrade;
        '' close;
    }
}

# websocket
upstream websocket {
    server xxx.xxx.xxx.xxx:8082;
    server xxx.xxx.xxx.xxx:8082;
}
server {

    # websocket
    location ^~ /web/springws/ {
    proxy_pass http://websocket;
    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;
    }
}