nginx实时生成缩略图到硬盘上

如今随着各终端的出现(手机,ipad等平板),以及各类终端的手机分辨率和尺寸都不一样,如今手机用户流量都是宝,网上出现了各类各样的生成缩略图功能的架构,有使用php实时生成缩略图的,也有用nginx + lua实现的,上节我也讲到了使用nginx生成缩略图,可是用户每次访问都须要生成一次,会给cpu和硬盘带来比较大的压力,今天带来了另一种方式,此次使用nginx将原图生成缩略图到硬盘上.看个人配置 php

1. 首先建好cache目录 html

# mkdir /data/site_cache/

2. 修改nginx配置 nginx

        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;
                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/;
                image_filter resize $arg_width $arg_height;
                image_filter_jpeg_quality 75;
                access_log off;
        }

生成缩略图流程以下:
一、原图在www.ttlsa.com/image/1.jpg。我须要一份100x100的缩略图。
二、请求www.ttlsa.com/resize_100x100/image/1.jpg.
三、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,若是存在直接放回给用户,
四、不存在那么跳转到http://www.ttlsa.com/image_resize/image/1.jpg?width=100&height=100;
五、location /image_resize根据传入的width和height执行缩略功能,而且设置图像质量为75
六、接着生成文件到/data/site_cache/www.ttlsa.com/resize_100x100/image/1.jpg
七、而且返回图片给用户
八、nginx生成缩略图到硬盘上的功能到这里就结束了
转载请注明出处: nginx实时生成缩略图到硬盘上 bash

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