用户之前在参加的上传图片活动都没有经过无损压缩处理.想用脚本对一月内传上去的图片进行处理,但服务集群上只能使用他们提供的一些简单的API.所以只能先down 下来,压缩处理后,再传上去覆盖原来的图片.

经过多次调试,最终写了个php的脚本对之进行处理:详见.

代码如下:

1:  
        

2:  function compress_img ($source) {

3:      $exts = array("png","bmp","gif","pnm","tiff");

4:      $start_time = strtotime("-30 day");

5:      exec("s3cmd ls s3://fever38-us-static/hotdeals/{$source}/ > ./tmp.txt");

6:      $rs = file('./tmp.txt');

7:   

8:      foreach($rs as $line) {

9:          $r =  array_filter(explode(' ', $line));

10:          if(!empty($r[0])){

11:              $r[0] = trim($r[0]);

12:              $time = strtotime($r[0]);

13:          }

14:          if(!empty($time) && $time >= $start_time){

15:              if(!empty($r[10])){

16:                  $img = trim($r[10]);

17:                  $path_info = pathinfo($r[10]);

18:                  $ext = trim($path_info["extension"]);

19:                  $file_name = strtolower(trim($path_info["basename"]));

20:   

21:                  exec("s3cmd get ".$img);

22:                  exec("cp {$file_name} /mnt/heisoo/s3/{$source}/");

23:   

24:                  if (in_array($ext,$exts)) {

25:                      system("/usr/bin/optipng -o5 ".$file_name);

26:                  }

27:                  if ($ext == "jpg" || $ext == "jpeg") {

28:                      system("/usr/bin/jpegoptim -o --strip-all ".$file_name);

29:                  }

30:                  system("s3cmd put {$file_name} {$img} --guess-mime-type --add-header 'Cache-Control:max-age=31536000' --add-header 'Expires: Thu, 01 Dec 2014 16:00:00 GMT' --acl-public");

31:                  unlink($file_name);

32:              }

33:          }

34:      }

35:   

36:      unlink('./tmp.txt');

37:  }

38:   

39:  compress_img("promotion_main_pic");

40:  compress_img("src_thumb");

41:  compress_img("uploadImage");

42:  compress_img("dialog_image");

43:  compress_img("joinPicture");

44:  ?>