使用Nginx自动裁剪图片

HttpImageFilterModule：http://wiki.nginx.org/HttpImageFilterModule

在编译要带上参数 --with-http_image_filter_module

配置nginx：

#vi nginx.conf

location ~* ^/img/pro/(.*)_RsT_(\d*)x(\d*)\.jpg$ {

            root /data/store/newvideo/video/ZhongXun/Web_images;

            rewrite /img/pro/(.*)_RsT_(\d*)x(\d*)\.jpg /$1 break;

            image_filter resize $2 $3;

}

在使用方法1过程中，不知是我人品问题还是怎么回事，只要是要裁剪的图片超过1M，无论image_filter_buffer参数调成多大，总是报415 错误，网上也找不到什么解决办法，后来只能用方法2解决。
 

NginxEmbeddedPerlImageResize：http://wiki.nginx.org/NginxEmbeddedPerlImageResize

安装ImageMagick

# yum install ImageMagick ImageMagick-perl

在编译nginx要带上参数 --with-http_perl_module

配置nginx：

http{

     perl_modules perl/lib;

     perl_require resize.pm;

     server {

     .............

          location ~* ^/img/pro/(.*)_RsT_(\d*)x(\d*)\.jpg$ {

               root /data/store/images;

               rewrite /img/pro/(.*)_RsT_(\d*)x(\d*)\.jpg /$1 break;

               image_filter resize $2 $3;

               error_page     415   = /$1_RsT_.$2x$3.jpg;

           }

           location /pic {

               root /data/store/images/;

                if (!-f $request_filename) {

                     rewrite ^(.*)(.jpg|.JPG|.gif|.GIF|.png|.PNG)$ /resize$1$2 last;

                }

           }

         location /resize {

             perl resize::handler;

         }

     }

}

resize.pm的内容如下：

package resize;

use nginx;

use Image::Magick;

our $base_dir="/data/store/images";  #注意，如果nginx是使用其它用户启动的，启动用户一定要用这个目录的写权限

our $image;

 

sub handler {

  my $r = shift;

  return DECLINED unless $r->uri =~ m/\.jpg_RsT_\.\d{1,}?x\d{1,}?\./;

  my $uri=$r->uri;

  $uri=~ s!^/resize!!;

  my $dest_file="$base_dir/$uri";

  my @path_tokens=split("/", $uri);

  my $filename=pop @path_tokens;

  my @filename_tokens=split('\.', $filename);

 

  # We know  the last part is the extension;

  # We know the one before that is the dimensions

  # We know that the one before that is the resize_to string

  my $ext=pop @filename_tokens;

  my $dimensions=pop @filename_tokens;

  pop @filename_tokens;

  $filename=join('.', @filename_tokens, $ext);

 

  my $real_file_path=join("/",   $base_dir, @path_tokens, $filename);

  return DECLINED unless -f $real_file_path;

  my ($width,$height)=split("x", $dimensions);

  if ($height<1) {

    $dimensions=$width;

  }

  $image= new Image::Magick;

  $image->Read($real_file_path);

  $image->Scale($dimensions);

  $image->Write($dest_file);

  $r->sendfile($dest_file);

  return OK;

}