下载.zip文件适用于网站图片，但不适用于带有签名网址的Amazon S3图片

Question

我在Amazon S3上有一个带有签名网址的对象。我的示例被简化为一个图像，我的目标是下载带有该图像的zip文件。

此图片适用于变量$fileUrl

中的代码

  

http://google.com/images/logo.png

但不是这个（在变量$fileUrl中），我得到一个损坏的.zip文件。我可以使用签名的网址在浏览器中打开图片。

  

https://mybucketname.s3.amazonaws.com/94c70e8a-61f6-4f58-a4b7-1679df5a7c1f.jpg?response-content-disposition=attachment%3B%20filename%3D94c70e8a-61f6-4f58-a4b7-1679df5a7c1f.jpg&AWSAccessKeyId=AKIAJNY3GPOFFLQ&Expires=1426371544&Signature=HDNhGKHDsjEgqkMreN3tbozkfzo%3D

  $zipName = 'zipfile.zip';

  # create new zip opbject
  $zip = new ZipArchive();

  $fileUrl = 'https://mybucketname.s3.amazonaws.com/94c70e8a-61f6-4f58-a4b7-1679df5a7c1f.jpg?response-content-disposition=attachment%3B%20filename%3D94c70e8a-61f6-4f58-a4b7-1679df5a7c1f.jpg&AWSAccessKeyId=AKIAJNY3GPOFFLQ&Expires=1426371544&Signature=HDNhGKHDsjEgqkMreN3tbozkfzo%3D';

  # create a temp file & open it
  $tmp_file = tempnam('.','');
  $zip->open($tmp_file, ZipArchive::CREATE);

  # download file
    $download_file = file_get_contents($fileUrl);

    #add it to the zip
    $zip->addFromString(basename($fileUrl),$download_file);

    # close zip
    $zip->close();

    # send the file to the browser as a download
    header('Content-type: application/zip');
    header('Content-disposition: attachment; filename='.$zipName);
    header('Content-Length: ' . filesize($tmp_file));
    readfile($tmp_file);