nginx.conf
动静分离rewrite新域名跨越问题
rewrite ^/ http://staticwww.dachuizichan.com$uri permanent;

add_header Access-Control-Allow-Origin *;
if ($request_method = 'OPTIONS') {
                add_header Access-Control-Allow-Origin *;
                add_header Access-Control-Allow-Credentials true;
                add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
                add_header 'Access-Control-Allow-Headers' 'Access-Control-Allow-Origin, x-requested-with, content-type';
                return 200;
            }



user  nginx;
worker_processes  1;
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;
    sendfile        on;
    keepalive_timeout  65;
    gzip  on;
    gzip_min_length 1k;
    gzip_buffers    4 16k;
    gzip_http_version 1.0;
    gzip_comp_level 2;   1-10，数字越大压缩的越好，时间也越长
    gzip_types text/plain application/x-javascript text/css application/xml text/javascript application/
    x-httpd-php image/jpeg image/gif image/png;
    gzip_vary off;  跟Squid等缓存服务有关，on的话会在Header里增加"Vary: Accept-Encoding"

    proxy_temp_path /tmp/temp_dir;   #缓存目录
    proxy_cache_path /tmp/cache levels=1:2 keys_zone=cache_one:200m inactive=1d max_size=30g;
    server {
        listen       81;
        server_name  localhost;
        rewrite ^/ http://$host:8081/3m/index.do last;
    }
    server {
        listen       8081;
        server_name  localhost;
        root  /usr/local/tomcat/webapps;
        location ~ (\.jsp|\.do|imageServlet)$ {
            proxy_pass http://127.0.0.1:8080;
            proxy_redirect off;
            proxy_set_header Host $host;
            proxy_set_header X-Real-IP $remote_addr;
            proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
            client_max_body_size 10m;   #允许客户端请求的最大单文件字节数
            client_body_buffer_size 128k; #缓冲区代理缓冲用户端请求的最大字节数
            proxy_connect_timeout 90;   #nginx跟后端服务器连接超时时间(代理连接超时)
            proxy_read_timeout 90;      #连接成功后，后端服务器响应时间(代理接收超时)
            proxy_buffer_size 4k;       #设置代理服务器（nginx）保存用户头信息的缓冲区大小
            proxy_buffers 6 32k;        #proxy_buffers缓冲区，网页平均在32k以下的话，这样设置
            proxy_busy_buffers_size 64k;#高负荷下缓冲大小（proxy_buffers*2）
            proxy_temp_file_write_size 64k; #设定缓存文件夹大小，大于这个值，将从upstream服务器传   
        }
        location ~ .*\.(html|js|css|gif|jpg|png|bmp|swf|ico|txt)?$ {
            proxy_cache cache_one; # 设置缓存共享内存区块，也就是keys_zone名称。
            proxy_cache_valid 200 302 1h;
            expires 1d;
            root /usr/local/nginx/aaa/;  文件目录
        }
        error_page  404              /404.html;
        error_page   500 502 503 504  /50x.html;
        location = /50x.html {
            root   html;
        }
    }
}