反向代理websocket

For NGINX to send the Upgrade request from the client to the backend server, the Upgrade and Connection headers must be set explicitly, as in this example:

  1. location /wsapp/ {
  2.     proxy_pass http://wsbackend;
  3.     proxy_http_version 1.1;
  4.     proxy_set_header Upgrade $http_upgrade;
  5.     proxy_set_header Connection "Upgrade";
  6.     proxy_set_header Host $host;
  7. }


参考：NGINX as a WebSocket Proxy

Linux中配置

昨天在搭建测试环境时，一直无法转发请求，配置如下

  1. server {
  2.     listen 80;
  3.     server_name localhost;
  4.     root /usr/share/nginx/html;
  5.     location / {  
  6.         root /usr/share/nginx/html;
  7.         try_files $uri $uri/ /index.html;
  8.     }
  9.     location /api {
  10.         proxy_pass http://dingtalk_springboot:8080;
  11.     }
  12. }

按照一篇博客修《nginx 反向代理用做内网域名转发》修改后成功

  1. server {
  2.     listen 80;
  3.     server_name localhost;
  4.     root /usr/share/nginx/html;
  5.     location / {  
  6.         root /usr/share/nginx/html;
  7.         try_files $uri $uri/ /index.html;
  8.     }
  9.     location /api {
  10.         proxy_set_header Host $host;
  11.         proxy_set_header X-Real-IP $remote_addr;
  12.         proxy_pass http://dingtalk_springboot:8080;
  13.     }
  14. }

主要时proxy_set_header Host $host; 起作用

这一行的作用是把原http请求的Header中的Host字段也放到转发的请求里 而服务器是靠这个Host值来区分你请求的是哪个域名的资源的。

代理的后端服务器可以通过 Host 头得知用户访问的真正的域名, 如不设置, 则得到是代理服务(nginx)的 ip, 这样对于动态拼接的 url,后端服务器能在页面里返回正确的 url.

参考：

  1. nginx配置proxy_set_header Host $host的作用?

windows中配置

  1. 无法重新加载的问题