ngds/ak-upload-server/upload_img_filter.prod.conf

set $rule_root $document_root;
location ~* /files/(.*)/(.*)\/([0-9a-z]+)\.(jpg|png|jpeg|gif)@(\d+)x(\d+)Q_([rc])$ {
    if (-f $request_filename) {
        break;
    }
    set $filepath "files/$1/$2";
    set $filename "$3.$4";
    set $thumb    "$3_$5x$6.$4";
    set $width    $5;
    set $height   $6;
    set $type    $7;
    if ( $type = 'r' ){
        set  $type   'image-resize';   #旋转
    }
    if ( $type = 'c' ){
      set $type  'image-crop'; #剪切
   }
    if (!-f $document_root/$filepath/$filename) {
        return 404;
    }
    rewrite /files/(.*)/(.*)\/([0-9a-z]+)\.(.*) /data/ak-upload-server/imgcache/$1/$2/$thumb;
    if (!-f $request_filename) {
        proxy_pass $scheme://127.0.0.1:$server_port/$type/$filepath/$filename?width=$width&height=$height;
        break;
    }
    proxy_store          /data/ak-upload-server/imgcache/$1/$2/$thumb;
    proxy_store_access   user:rw  group:rw  all:r;
    proxy_set_header     Host $host;
    expires  10d; # 设置图片过期时间10天
}
location ^~ /image-resize {
    #rewrite /(image-resize)/(.*) /$2 break;
    alias $rule_root/;
    image_filter resize $arg_width $arg_height;
    image_filter_jpeg_quality 75;
    image_filter_buffer 20m;
    #allow 127.0.0.0/8;
    #deny all;
}
location ^~ /image-crop {
    #rewrite /(image-crop)/(.*) /$2 break;
    alias $rule_root/;
    image_filter crop $arg_width $arg_height;
    image_filter_jpeg_quality 75;
    image_filter_buffer 20m;
    #allow 127.0.0.0/8;
    #deny all;
}