1. 程式人生 > >利用 nginx 擴充套件實現圖片剪裁

利用 nginx 擴充套件實現圖片剪裁

無快取版本

第一步:安裝nginx模組
ngx_http_image_filter_module,用寶塔linux一鍵安裝,有自帶。

第二步:修改配置

    location ~ (.+?)_(\d+)x(\d+)\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        set $file $1_$2x$3_100.$4;
        rewrite ^.*$ $file last;
    }

    location ~ (.+?)_(\d+)x(\d+)_(\d+)\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        expires 30d;
        access_log off;
        set $file $1.$5;
        set $h $2;
        set $w $3;
        set $q $4;

        if ($h = '0') {
            rewrite ^.*$ $file last;
        }

        if ($w = '0') {
            rewrite ^.*$ $file last;
        }

        image_filter_jpeg_quality $q;

        # 根據給定的長寬生成縮圖
        image_filter resize $h $w;
        # 根據給定的長寬剪裁圖片
        image_filter crop $h $w;
        # 原圖最大2M,要裁剪的圖片超過2M返回415錯誤,需要調節引數image_filter_buffer
        image_filter_buffer 2M;

        # error_page 415 /notfound.jpg;
        try_files $file /notfound.jpg;
    }

第三步:測試
原圖:http://xxx.com/abc.jpg
裁剪100x100:http://xxx.com/abc_100x100.jpg
裁剪200x200:http://xxx.com/abc_200x200.jpg
裁剪200x200兼調整質量50:http://xxx.com/abc_200x200_50.jpg
裁剪200x200兼調整質量80:http://xxx.com/abc_200x200_80.jpg


帶檔案快取

第一步:安裝nginx模組
ngx_http_image_filter_module,用寶塔linux一鍵安裝,有自帶。

第二步:修改配置
新增一個配置檔案,並且監聽多一個埠,該配置專門用於縮圖片

server
{
    listen 88;
    root /www/wwwroot/mn.com/public/;

    location /
    {
        image_filter_jpeg_quality $arg_quality;
        image_filter resize $arg_height $arg_width;
        image_filter crop $arg_height $arg_width;
        image_filter_buffer 2M;
        allow 127.0.0.0/8;
        deny all;
    }
}
    location ~ (.+?)_(\d+)x(\d+)\.(gif|jpg|jpeg|png|bmp|swf)$
    {
        set $file $1_$2x$3_100.$4;
        rewrite ^.*$ $file last;
    }

    location ~ (.+?)_(\d+)x(\d+)_(\d+)\.(gif|jpg|jpeg|png|bmp|swf)$
    {
       root /tmp/nginx/resize;
       expires 30d;
       access_log off;

       set $file $1.$5;
       set $h $2;
       set $w $3;
       set $q $4;

       if ($h = '0') {
           rewrite ^.*$ $file last;
       }

       if ($w = '0') {
           rewrite ^.*$ $file last;
       }

       set $image_uri $file?width=$w&height=$h&quality=$q;

       if (!-f $request_filename) {
           proxy_pass http://127.0.0.1:88/$image_uri;
           break;
       }
       # 此處配置快取的地方,我配置的是 /tmp/nginx/resize ,由本location的root決定
       proxy_store          $request_filename;
       proxy_store_access   user:rw group:rw all:r;
       proxy_temp_path      /tmp/images;
       proxy_set_header     Host $host;
    }

第三步:測試
原圖:http://xxx.com/abc.jpg
裁剪100x100:http://xxx.com/abc_100x100.jpg
裁剪200x200:http://xxx.com/abc_200x200.jpg
裁剪200x200兼調整質量50:http://xxx.com/abc_200x200_50.jpg
裁剪200x200兼調整質量80:http://xxx.com/abc_200x200_80.jpg
用畫圖工具編輯/tmp/nginx/resize/下面的abc_200x200_80.jpg影象加點花,再次請求http://xxx.com/abc_200x200_80.jpg,你將看到的是快取檔案。