user www www;

worker_processes 4;

worker_rlimit_nofile 20480;

error_log  logs/error.log;

events 
{
        use epoll;

        worker_connections 81920;
}

http 
{
        keepalive_timeout 10;
        
        ncache_max_size 24;

        proxy_buffering off;

        ncache_dir /data1/cache_file  60;#the file for storage,60G
        ncache_dir /data2/cache_file  60;
        hash_index_dir /data1/ncache_index;#v3.1,you need to define the index file position
        auto_delete_file on;#enable the auto delete file
        ncache_ignore_client_no_cache on;
        
        upstream backend 
        {
            server 10.0.0.1;
        }

        sendfile on;

        send_timeout 10;

        client_header_timeout 10;


        tcp_nodelay on;
        
        log_format main      '$proxy_add_x_forwarded_for - $remote_user [$time_local] '
                             '"$request" $status $bytes_sent '
                             '"$http_referer" "$http_user_agent" $remote_addr';

        include "mime.types";

        default_type text/html;

        server 
        {
                server_name  .blog.sina.com.cn;

                listen *:80;
                
                set $xvia "blog.sina.com.cn";   
    
                set $proxy_add_agent "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; NginxCache)";
                access_log logs/blog.sina.com.cn-access_log main;

                location / 
                {

                        if ($request_method ~ "PURGE")
                        {
                                        rewrite (.*) /PURGE$1 last;
                        }
                

                        ncache_http_cache;

                        error_page  404 = /fetch$request_uri;
                        
                        add_header      Sina-Cache   $xvia;

                }

                location /ncache_state
                {
                    ncache_state;
                }


                location /fetch
                {
                    internal;
                    proxy_pass http://backend;
                    add_header      Sina-Cache   $xvia;
                    proxy_hide_header   User-Agent;
                    proxy_set_header    User-Agent $proxy_add_agent;
                    proxy_set_header    X-Forwarded-For $proxy_add_x_forwarded_for;
                }


                location /PURGE/ 
                {       
                    access_log logs/purge.blog.sina.com.cn-access_log main;
                    internal;
                    allow 10.55.37.0/24;
                    allow 10.69.3.0/24;
                    allow 10.49.10.0/24;
                    deny    all;
                    ncache_purge;
                }
        }
}