【 Nginx 】proxy_cache 模块的使用记录

部署环境：nginx + tomcat  同一台服务器。

　　通过nginx反向代理tomcat。

　　配置如下：

user  www www;
worker_processes  auto;

error_log  logs/error.log;
#error_log  logs/error.log  notice;
#error_log  logs/error.log  info;

pid        logs/nginx.pid;

worker_rlimit_nofile ;

events {
    use epoll;
    multi_accept on;
    worker_connections  ;
}

http {
    server_tokens off;
    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;
    open_log_file_cache max= inactive=15s min_uses= valid=5m;

    sendfile        on;
    tcp_nopush     on;

    #keepalive_timeout  ;
    keepalive_timeout  ;
    client_header_timeout 2m;
    client_body_timeout 3m;
    reset_timedout_connection on;
    send_timeout 15s;

    open_file_cache max= inactive=20s;
    open_file_cache_valid 30s;
    open_file_cache_min_uses ;
    open_file_cache_errors on;

    gzip  on;
    gzip_disable "msie6";
    gzip_proxied any;
    gzip_comp_level ;
    gzip_min_length 1k;
    gzip_vary on;
    gzip_types text/plain text/css application/json application/x-javascript text/xml application/xml application/xml+rss text/javascript;

    proxy_connect_timeout ;
    proxy_send_timeout ;
    proxy_read_timeout ;
    proxy_buffer_size 16k;
    proxy_buffers  64k;
    proxy_busy_buffers_size 128k;
    proxy_temp_file_write_size 128k;
    proxy_cache_path /usr/local/nginx/cache/proxy_cache_dir levels=: keys_zone=cache_one:200m inactive=1d max_size=30g;

    upstream backend_tomcat {
    server 10.0.10.5: weight= max_fails= fail_timeout=;
    }

    server {
        listen       ;
        server_name  localhost;

        #charset koi8-r;

        #access_log  logs/host.access.log  main;

        location / {
            #root   html;
            #index  index.html index.htm;
        #proxy_pass http://10.0.10.5:10888;
        proxy_cache cache_one;
        proxy_cache_valid   12h;
        proxy_cache_bypass $cookie_nocache $arg_nocache$arg_comment;
        proxy_cache_key $host$uri$is_args$args;
        proxy_pass http://backend_tomcat;
        #expires 1d;
        }

    #location ~ .*\.()

        #error_page                /.html;

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

        # proxy the PHP scripts to Apache listening on 127.0.0.1:
        #
        #location ~ \.php$ {
        #    proxy_pass   http://127.0.0.1;
        #}

        # pass the PHP scripts to FastCGI server listening on 127.0.0.1:
        #
        #location ~ \.php$ {
        #    root           html;
        #    fastcgi_pass   127.0.0.1:;
        #    fastcgi_index  index.php;
        #    fastcgi_param  SCRIPT_FILENAME  /scripts$fastcgi_script_name;
        #    include        fastcgi_params;
        #}

        # deny access to .htaccess files, if Apache's document root
        # concurs with nginx's one
        #
        #location ~ /\.ht {
        #    deny  all;
        #}
    }

    # another virtual host using mix of IP-, name-, and port-based configuration
    #
    #server {
    #    listen       ;
    #    listen       somename:;
    #    server_name  somename  alias  another.alias;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}

    # HTTPS server
    #
    #server {
    #    listen        ssl;
    #    server_name  localhost;

    #    ssl_certificate      cert.pem;
    #    ssl_certificate_key  cert.key;

    #    ssl_session_cache    shared:SSL:1m;
    #    ssl_session_timeout  5m;

    #    ssl_ciphers  HIGH:!aNULL:!MD5;
    #    ssl_prefer_server_ciphers  on;

    #    location / {
    #        root   html;
    #        index  index.html index.htm;
    #    }
    #}
    include vhosts/*.conf;
}

　　在此次配置中，使用到了proxy_cache模块，也因为这个模块造成了一个问题：

　　　　用户通过页面登录系统，然后在通过页面按钮，点击退出。这时，如果点击浏览器的退后按钮aaarticlea/png;base64,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" alt="" />

　　　　就会出现页面为登出系统的界面，刷新也是停留在登录后的页面，还可以进行一系列的操作。

　　　　通过这个问题，我还是对proxy_cache模块的怀疑，是否proxy_cache对session也存在缓存的问题。

　　再次修改配置文件，取消proxy_cache的使用，上述问题得到解决。如果proxy_cache模块对每个需要登录的网站都存在以上问题，那proxy_cache存在的必要是什么？