Nginx生成缩略图并存储到硬盘上
现在随着各终端的出现(手机，ipad等平板),以及各种终端的手机分辨率和尺寸都不同，现在手机用户流量都是宝,网上出现了各种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，但是用户每次访问都需要生成一次，会给cpu和硬盘带来比较大的压力，今天带来了另外一种方式，这次使用nginx将原图生成缩略图到硬盘上.看我的配置
1、首先创建好cache目录
[root@masterserver ~]# mkdir -p /data/stie_cache [root@masterserver ~]#
2、修改nginx配置，增加如下内容
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 $arg_height; image_filter_jpeg_quality 75; access_log off; }
完整的nginx配置文件如下:
[root@masterserver conf]# cat nginx.conf worker_processes 1; events { worker_connections 1024; } http { include mime.types; default_type application/octet-stream; sendfile on; keepalive_timeout 65; server { listen 80; server_name localhost; location / { root html; index index.html index.htm; image on; image_output on; } location ~* ^/resize { root /data/site_cache/$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; } error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } } } [root@masterserver conf]#
提示:
nginx编译的时候要添加参数--with-http_image_filter_module，保险起见将模块ngx_image_thumb-master也带上，所以最终nginx编译参数为:
./configure --add-module=../ngx_image_thumb-master/ --with-http_image_filter_module
生成缩略图流程如下：
1、原图在http://10.0.0.10/image/1.jpg。我需要一份100x100的缩略图。
2、请求.
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;
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/10.0.0.10/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
以上所述是小编给大家介绍的Nginx生成缩略图并存储到硬盘上的相关知识，希望对大家有所帮助！
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