nginx 生成 缩略图 and 生成缩略图到硬盘

linre

nginx  编译的时候增加  ./configure --with-http_image_filter_module

配置如下



server
{
  listen     80;
  server_name 192.168.0.156;
  index index.html index.htm index.php;
  root /opt/htdocs;
  access_log /opt/local/nginx/logs/access.log main;

  location ~* (.*)/(\d+)\.(jpg|png|gif)$
   {
    set $h $arg_h;
    set $w $arg_w;
     #image_filter crop $h $w;
      image_filter resize $h $w;
    }
  location ~* /(\d+)_(\d+)x(\d+)\.(jpg|png|gif)$
     {
   if ( -e $document_root/$1.$4 )
   {
   rewrite /(\d+)_(\d+)x(\d+)\.(jpg|png|gif)$ /$1.$4?h=$2&w=$3 last;
    }
   return 404;
  }
}



缩略图使用.. 图片保存在 /opt/htdocs/upload/ 目录下面.. 如 0.jpg

原图访问 http://192.168.0.156/upload/0.jpg

缩略100x100 访问  http://192.168.0.156/upload/0_100x100.jpg
缩略300x300 访问  http://192.168.0.156/upload/0_300x300.jpg

如果原图不存在  将会返回 404 !!









生成缩略图到本地硬盘中




server
{
  listen     80;
  server_name 192.168.0.156;
  index index.html index.htm index.php;
  root /opt/htdocs;
  access_log /opt/local/nginx/logs/www.xxx.com.log main;

  location ~* ^/resize
    {
  set $width  100;
  set $height 100;
  set $dimens "";

  if ($uri ~* "^/resize_(\d+)x(\d+)/(.*)" )
    {
   set $width $1;
   set $height $2;
   set $image_path $3;
   set $demins "_$1x$2";
  }
   if ($uri ~* "^/resize/(.*)" )
    {
   set $image_path $1;
    }

   set $image_uri image_resize/$image_path?width=$width&height=$height;

   if (!-f $request_filename) {
   proxy_pass http://192.168.0.156/$image_uri;
   break;
    }
   proxy_store /opt/htdocs/upload/resize$demins/$image_path;
   proxy_store_access user:rw group:rw all:r;
   proxy_set_header Host $host;
   expires      30d;
   access_log off;
  }

   location /image_resize {
   alias /opt/htdocs/;
   image_filter resize $arg_width $arg_height;
   image_filter_jpeg_quality 75;
   access_log off;
}
}



缩略图使用.. 图片保存在 /opt/htdocs/upload/ 目录下面.. 如 0.jpg

原图访问 http://192.168.0.156/upload/0.jpg

访问 http://192.168.0.56/resize/upload/0.jpg   

  location ~* ^/resize
    {
  set $width  100;
  set $height 100;
  set $dimens "";

缩略为定义的 100 x 100


当缩略图存在时间
访问  http://192.168.0.156/resize_100x100/upload/0.jpg

  if ($uri ~* "^/resize_(\d+)x(\d+)/(.*)" )
    {
   set $width $1;
   set $height $2;
   set $image_path $3;
   set $demins "_$1x$2";
  }
   if ($uri ~* "^/resize/(.*)" )
    {
   set $image_path $1;
    }

缩略为 resize_$width x $height    缩略定义大小


当缩略图不存在时，使用直接缩略 图片质量为 75%

   set $image_uri image_resize/$image_path?width=$width&height=$height;


   location /image_resize {
   alias /opt/htdocs/;
   image_filter resize $arg_width $arg_height;
   image_filter_jpeg_quality 75;
   access_log off;




访问  http://192.168.0.156/image_resiz ... =100&height=100


并利用 Nginx proxy_store 缓存缩略的图片到本地

   if (!-f $request_filename) {
   proxy_pass http://192.168.0.156/$image_uri;
   break;
    }
   proxy_store /opt/htdocs/upload/resize$demins/$image_path;
   proxy_store_access user:rw group:rw all:r;
   proxy_set_header Host $host;
   expires      30d;
   access_log off;
  }

访问  http://192.168.0.156/resize_100x100/upload/0.jpg

生成图片的路径为 /opt/htdocs/upload/resize_100x100/upload/0.jpg