nginx实时生成缩略图到硬盘上

1. 首先建好cache目录

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1	# mkdir /data/site_cache/

2. 修改nginx配置

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location ~* ^ /resize {                  root /data/site_cache/ $server_name; #                  set $width 150;                  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 $request_filename) {                          proxy_pass http: //127 .0.0.1/$image_uri;                          break ;                  }                  proxy_store /data/site_cache/ $server_name /resize $demins/$image_path; #保存[缩略图]地址【proxy_store /data/web/wallpaper/Public/data/site_cache/$server_name/resize$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 /data/site/ $server_name/; #这是原图地址【alias /data/web/wallpaper/Public/data;】                  image_filter resize $arg_width $arg_height;                  image_filter_jpeg_quality 75;                  access_log off;          }

生成缩略图流程如下：
1、原图在www.ttlsa.com/image/1.jpg。我需要一份100x100的缩略图。
2、请求www.ttlsa.com/resize_100x100/image/1.jpg.
3、这个请求进入了location ~* ^/resize,接着判断image_path这个目录下是否存在这张图片,如果存在直接放回给用户,
4、不存在那么跳转到http://www.ttlsa.com/image_resize/image/1.jpg?width=100&height=100;
5、location /image_resize根据传入的width和height执行缩略功能,并且设置图像质量为75
6、接着生成文件到/data/site_cache/www.ttlsa.com/resize_100x100/image/1.jpg
7、并且返回图片给用户
8、nginx生成缩略图到硬盘上的功能到这里就结束了
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