修改Nginx配置文件：

location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        expires      30d;
        error_log /dev/null;
        root /home/file;#指定文件路径
        access_log /home/file/logs/file.log;
        proxy_store on;
        proxy_store_access user:rw group:rw all:rw;
        proxy_temp_path /home/file;# 文件访问路径
        proxy_redirect off;
        proxy_set_header Host 127.0.0.1;
        client_max_body_size 10m;
        client_body_buffer_size 1280k;
        proxy_connect_timeout 900;
        proxy_send_timeout 900;
        proxy_read_timeout 900;
        proxy_buffer_size 40k;
        proxy_buffers 40 320k;
        proxy_busy_buffers_size 640k;
        proxy_temp_file_write_size 640k;
        if ( !-e $request_filename)
         {
           proxy_pass http://127.0.0.1;
         }
    }
    location / {
          root /home/file/; #html访问路径
          index index.html index2.htm; #html文件名称
    }