利用nginx的反向代理，端口指定部分路径转发Web Socket

因为项目的限制，主机仅对外开放80端口，但80端口又是被Web项目占用的，所以为了构建Web Socket，我采取了nginx反向代理，使得部分路径转接到Web Socket服务（聆听于另一端口）上。

nginx 配置如下：

upstream websocket {
    server 127.0.0.1:9001;    #Web Socket 聆听于9001端口
        keepalive 32;
}
server {
        listen       80;
        server_name  _;
        index index.html index.htm;


        root         /home/www/web;
        location ~* /(video|text) {    #匹配路径                                                                                            
            proxy_pass http://websocket;    #转发
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_http_version 1.1;
	    proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";
        }
        error_page 404 /404.html;
        location = /40x.html {
        }

        error_page 500 502 503 504 /50x.html;
        location = /50x.html {
        }
}

最终效果为：

ws://192.168.0.111/video 被转发至 ws://127.0.0.1:9001/video

注意，配置中的：

            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $remote_addr;
            proxy_http_version 1.1;
	    proxy_set_header Upgrade $http_upgrade;
            proxy_set_header Connection "upgrade";

是为了将HTTP请求改写成ws请求