1. 自定义错误页面

• error_page code ... [=[response]] uri;

  定义错误页，以指定的响应状态码进行响应，此指令由ngx_http_index_module模块提供

  支持环境：http, server, location, if in location

  #1.修改nginx的配置文件如下，定义错误页，把500 502 503 504 404这些状态码转换为200状态码，并定义错误页面。
  [root@nginx01 ~]# vim /etc/nginx/conf.d/virtualhost.conf 
  server {
  	listen 80;
  	server_name www.nginx01.com;
  	location / {
  		root /data/nginx/html/web1;
  		index index.html;
  	}
  
  	error_page 500 502 503 504 404 =200 /errorpage.html;
  	location = /errorpage.html {
  		root /data/nginx/html/web1/errorpage/;
  	}
  }
  
  #2.重启nginx服务
  [root@nginx01 web1]# systemctl reload nginx.service
  
  #3.在web1下新建目录errorpage和文件errorpage/errorpage.html
  [root@nginx01 web1]# ll errorpage/
  total 4
  -rw-r--r-- 1 root root 31 Jun 15 23:30 errorpage.html
  [root@nginx01 web1]# cat errorpage/errorpage.html 
  our system is being maintained
  
  #4.使用客户端访问一个不存在的页面，能正常返回自定义的错误页面，状态码变为200
  [root@xuzhichao ~]# curl http://www.nginx01.com/abc
  our system is being maintained
  [root@xuzhichao ~]# curl -I http://www.nginx01.com/abc
  HTTP/1.1 200 OK
  Server: nginx/1.20.1
  Date: Tue, 15 Jun 2021 15:36:27 GMT
  Content-Type: text/html
  Content-Length: 31
  Last-Modified: Tue, 15 Jun 2021 15:30:38 GMT
  Connection: keep-alive
  ETag: "60c8c79e-1f"
  Accept-Ranges: bytes