How to configure Nginx to support websocket

1. Understanding of wss and nginx proxy wss:

1. The wss protocol is actually websocket SSL, which means adding an SSL layer to the websocket protocol, similar to https (http SSL).

2. Use nginx to proxy wss [communication principle and process]

• The client initiates a wss connection to connect to nginx

• Nginx forwards the WSS protocol data to Workerman's WebSocket protocol port and converts it into WS protocol data

• Workerman does business logic processing after receiving the data

• When Workerman sends a message to the client, it is the opposite process. The data is converted into wss protocol through nginx/and then sent to the client

2. Nginx supports websocket Configuration

server {
      listen   80;
      server_name 域名;
      location / {
        proxy_pass   http://127.0.0.1:8080/; // 代理转发地址
 　　　　proxy_http_version 1.1;
        proxy_read_timeout   3600s; // 超时设置
        // 启用支持websocket连接
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "upgrade";
      }
      location /upload { // 静态资源地址
            root   /mnt/resources;        
      }
}

The important thing is these two lines, which indicate that when the websocket connection comes in, a connection upgrade is performed to turn the http connection into a websocket connection.

proxy_set_header Upgrade $http_upgrade;
proxy_set_header Connection "upgrade";

proxy_read_timeout; Indicates the time to wait for the server response after the connection is successful. If not configured, the default is 60s;

proxy_http_version 1.1; Indicates that the http version is 1.1

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