Nginx系列p3：实现一个具有缓存功能的反向代理服务器

#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 {
    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"‘;

    access_log  logs/access.log  main;

    client_max_body_size 60M;
    
    # 【1】配置代理服务器的缓存
    proxy_cache_path /tmp/nginxcache levels=1:2 keys_zone=my_cache:10m max_size=10g
            inactive=60m use_temp_path=off;

    sendfile        on;
    tcp_nopush     on;

    #keepalive_timeout  0;
    keepalive_timeout  65; 
        #gzip  on;

    #【2】加入上游服务器，如果有多台，可以使用 hash/轮询来负载均衡
    # 本机只有一台服务器，就是上篇博客中使用的 nginx 搭建的
    upstream local {
        server 127.0.0.1:8080;
        # server ip:port;
        # server ip:port;
    }

    server {
        listen       80;   
        server_name localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        #【3】修改这部分配置文件，
        location / {
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forward-For $proxy_add_x_forwarded_for;
            proxy_pass http://local;

            #【4】使用上面设置的 cache 
            proxy_cache my_cache;
            proxy_cache_key $host$uri$is_args$args;
            proxy_cache_valid 200 304 302 1d;

            #root   html;
            #index  index.html index.htm;
        }

        #error_page  404              /404.html;

        # redirect server error pages to the static page /50x.html
        #
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }