location ^~ /user/files/ {
            expires 24h;
            alias /project/upload/files/;#指定图片存放路径
            access_log  logs/file.access.log main ;#日志存放路径
            proxy_store on;
            proxy_store_access user:rw group:rw all:rw;
            proxy_temp_path     /project/upload/nginxtmp;#图片访问路径
            proxy_redirect     off;
            #proxy_set_header    Host 127.0.0.1;
            client_max_body_size  100m;
            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;
            #}
        }