events {
      worker_connections  65535;
      use epoll;
          }
 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;
    access_log  off;
 
    charset utf-8;
 
    keepalive_timeout 60;
 
    sendfile off;
 
    tcp_nopush  off;
 
    client_header_buffer_size 8k;
 
    large_client_header_buffers 8 128k;
 
    client_max_body_size 300m;
 
    client_body_buffer_size 2048k;
 
    gzip off;
 
    server {
        server_name _;
 #      rewrite (.*)$ /opt/nginx/html/404.html?;
        return 404;
        error_page 404 = /opt/nginx/html/404.html;
        }
include    nginx-upload.conf;
server
{
 
 listen      80;
 server_name  file.xxx.com;
 root /usr/local/wwwweb/file.xxx.com;
 
 #access_log  /opt/nginx/logs/file.xxx.com;
 access_log  off;
 location  ~ .*\.(gif|jpg|jpeg|png)$ {
 root /usr/local/wwwweb/file.xxxx.com;
 
 #if ( !-f request_name  ) {
 if ( $status = 404  ) { 
      rewrite /(.*)\.jpg      /$1.JPG;
      rewrite /(.*)\.JPG      /$1.jpg;
 }
 } 
 }
}