使用Nginx自动裁剪图片

使用Nginx进行图片自动裁剪合符规范的图片方法：

方法1：nginx自带模块

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。

方法2：内嵌perl脚本实现

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;

}

使用Nginx自动裁剪图片

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