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user www www;

worker_processes 2; #设置值和CPU核心数一致

error_log /usr/local/webserver/nginx/logs/nginx_error.log crit; #日志位置和日志级别

#access_log /usr/local/webserver/nginx/logs/access.log crit;

pid /usr/local/webserver/nginx/nginx.pid;

#Specifies the value for maximum file descriptors that can be opened by this process.

worker_rlimit_nofile 65535;

events

{

  use epoll;

  worker_connections 65535;

}

http

{

  include mime.types;

  default_type application/octet-stream;

  log_format main  '$remote_addr - $remote_user [$time_local] "$request" '

               '$status $body_bytes_sent "$http_referer" '

               '"$http_user_agent" $http_x_forwarded_for';

#charset gb2312;

  server_names_hash_bucket_size 128;

  client_header_buffer_size 32k;

  large_client_header_buffers 4 32k;

  client_max_body_size 8m;

  sendfile on;

  tcp_nopush on;

  keepalive_timeout 60;

  tcp_nodelay on;

  fastcgi_connect_timeout 300;

  fastcgi_send_timeout 300;

  fastcgi_read_timeout 300;

  fastcgi_buffer_size 64k;

  fastcgi_buffers 4 64k;

  fastcgi_busy_buffers_size 128k;

  fastcgi_temp_file_write_size 128k;

  gzip on;

  gzip_min_length 1k;

  gzip_buffers 4 16k;

  gzip_http_version 1.0;

  gzip_comp_level 2;

  gzip_types text/plain application/x-javascript text/css application/xml;

  gzip_vary on;

  ##cache##

  proxy_buffer_size 16k;

  proxy_buffers 4 64k;

  proxy_busy_buffers_size 128k;

  proxy_temp_file_write_size 128k;

  proxy_temp_path /usr/local/webserver/nginx/temp;

  proxy_cache_path /usr/local/webserver/nginx/cache levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;

  ##end##

  #limit_zone crawler $binary_remote_addr 10m;

 #下面是server虚拟主机的配置

    upstream web_back{

        server 127.0.0.1:8080; #并且可以分配权重weight,这样来配置集群服务器的访问优先权

    }

 server

  {

    listen 8060;#监听端口

    #缓存相应的文件(静态文件)

    location ~ .*\.(gif|jpg|jpeg|jpg|css|js|ico)$ {

        proxy_pass http://web_back;         #如果没有缓存则通过proxy_pass转向请求

        proxy_redirect off;

        access_log off;# 关闭日志

        proxy_set_header Host $host;

        proxy_cache cache_one;

        proxy_cache_valid 200 302 24h;                              #对不同的HTTP状态码设置不同的缓存时间,h小时,d天数

        proxy_cache_valid 301 1d;

        proxy_cache_valid any 1m;

        expires 30d;

        add_header wall "cache-file";

    }

    #web 使用

    location /cpeducloud {

            proxy_pass http://localhost:8080/cpeducloud;

        proxy_redirect http:// https://;

        sendfile off; 

            proxy_set_header   Host             $host:$server_port;

            proxy_set_header   X-Real-IP        $remote_addr;

            proxy_set_header   X-Forwarded-For  $proxy_add_x_forwarded_for;

            proxy_set_header   Upgrade $http_upgrade;  

            proxy_set_header   Connection "Upgrade";

        proxy_max_temp_file_size 0;

            #this is the maximum upload size

            client_max_body_size       0;

            client_body_buffer_size    128k;

            proxy_connect_timeout      90;

            proxy_send_timeout         180;

            proxy_read_timeout         180;

            proxy_temp_file_write_size 64k;

            # Required for new HTTP-based CLI

            proxy_http_version 1.1;

    }

      location /download {

        proxy_pass http://localhost:8080/cpeducloud;

        proxy_redirect http:// https://;

        #下载速度限制

        #limit_rate_after 10m;

        limit_rate 5k;

    } 

    access_log logs/cpeducloud.log main;

  }

}

public

所有内容都将被缓存(客户端和代理服务器都可缓存)

private

内容只缓存到私有缓存中(仅客户端可以缓存，代理服务器不可缓存)

no-cache

必须先与服务器确认返回的响应是否被更改，然后才能使用该响应来满足后续对同一个网址的请求。因此，如果存在合适的验证令牌 (ETag)，no-cache 会发起往返通信来验证缓存的响应，如果资源未被更改，可以避免下载。

no-store

所有内容都不会被缓存到缓存或 Internet 临时文件中

must-revalidation/proxy-revalidation

如果缓存的内容失效，请求必须发送到服务器/代理以进行重新验证

max-age=xxx (xxx is numeric)

缓存的内容将在 xxx 秒后失效, 这个选项只在HTTP 1.1可用, 并如果和Last-Modified一起使用时, 优先级较高