[Nginx] Nginx 反向代理并缓存及缓存清除的方法

#user nobody;
worker_processes 1;
 
#error_log logs/error.log;
#error_log logs/error.log notice;
#error_log logs/error.log info;
 
#pid  logs/nginx.pid;
 
 
events {
  worker_connections 1024;
}
 
 
http {
  log_format main '$remote_addr - $remote_user [$time_local] "$request" '
       '$status $body_bytes_sent "$http_referer" '
       '"$http_user_agent" "$http_x_forwarded_for"'
     '$upstream_addr $upstream_status $request_time $upstream_response_time';
 
 
  access_log /var/log/nginx/access.log main;
  error_log  /var/log/nginx/error.log;
 
  server_tokens off;
  include  mime.types;
  default_type application/octet-stream;
  sendfile  on;
  tcp_nopush   on;
  client_max_body_size 10m;
  client_body_buffer_size 128k;
 
  proxy_connect_timeout 300;
  proxy_send_timeout 300;
  proxy_read_timeout 300;
  proxy_buffer_size 64k;
  proxy_buffers 4 512k;
  proxy_busy_buffers_size 512k;
  proxy_temp_file_write_size 512k;
  proxy_temp_path  /data/nginx/proxy_temp;
  proxy_cache_path /data/nginx/proxy_cache levels=1:2 keys_zone=cache_one:2000m inactive=3d max_size=500g;
 
  proxy_redirect off;
  proxy_set_header Host $host;
  proxy_set_header X-Real-IP $remote_addr;
  proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 
  gzip on;
  gzip_min_length 1k;
  gzip_buffers 4 16k;
  gzip_http_version 1.1;
  gzip_comp_level 2;
  gzip_types text/plain application/x-javascript text/css application/xml;
  gzip_vary on;
 
  upstream go {
  server www.cnblogs.com:80 weight=4;
  #server 42.121.252.58:80 weight=4;
  }
 
  server {
 
    listen  192.168.55.133:80;
    #server_name www.cnblogs.com;
    access_log /var/log/nginx/go.access.log main;
    error_log  /var/log/nginx/go.error.log error;
 
 
    location / {
      proxy_cache cache_one;
      #proxy_cache_valid 200 304 301 302 2h;
      #proxy_cache_valid any 2h;
      #expires 1d;
      add_header X-Cache $upstream_cache_status;
      proxy_pass http://go;
      proxy_cache_key  $uri$is_args$args;
    }
 
    location ~ /purge(/.*) {
    allow     127.0.0.1;
    allow     192.168.55.0/24;
    deny    all;
    proxy_cache_purge cache_one $1$is_args$args;
  }
 
  }
}