Amazon S3 URL signée en PHP

Question

Ceci est la fonction tirée d'un ancien plugin WP pour retourner une URL signée Amazon S3, mais je ne peux pas le faire fonctionner! Lorsque je visite l'URL signée retourne, je reçois ceci:

The request signature we calculated does not match the signature you provided. Check your key and signing method.

function s3Url($text) { 
    $AWS_S3_KEY = 'KEY'; 
    $AWS_S3_SECRET = 'SECRET'; 
    $tag_pattern = '/(\[S3 bucket\=(.*?)\ text\=(.*?)\](.*?)\[\/S3\])/i'; 

    define("AWS_S3_KEY", $AWS_S3_KEY); // replace this with your AWS S3 key 
    define("AWS_S3_SECRET", $AWS_S3_SECRET); // replace this with your secret key. 
    $expires = time()+get_option('expire_seconds'); 

    if (preg_match_all ($tag_pattern, $text, $matches)) { 

     for ($m=0; $m<count($matches[0]); $m++) { 
      $bucket = $matches[2][$m]; 
      $link_text = $matches[3][$m]; 
      $resource = $matches[4][$m]; 

      $string_to_sign = "GET\n\n\n$expires\n/".str_replace(".s3.amazonaws.com","",$bucket)."/$resource"; 

      //$string_to_sign = "GET\n\n\n{$expires}\n/{$bucket}/{$resource}"; 
      $signature = urlencode(base64_encode((hash_hmac("sha1", utf8_encode($string_to_sign), AWS_S3_SECRET, TRUE)))); 

      $authentication_params = "AWSAccessKeyId=".AWS_S3_KEY; 
      $authentication_params.= "&Expires={$expires}"; 
      $authentication_params.= "&Signature={$signature}"; 

      $tag_pattern_match = "/(\[S3 bucket\=(.*?)\ text\={$link_text}\]{$resource}\[\/S3\])/i"; 

      if(strlen($link_text) == 0) 
      { 
       $link = "http://{$bucket}/{$resource}?{$authentication_params}"; 
      } 
      else 
      { 
       $link = "<a href='http://{$bucket}/{$resource}?{$authentication_params}'>{$link_text}</a>"; 
      } 

      $text = preg_replace($tag_pattern_match,$link,$text); 
     } 
    } 

    return $text; 
} 

Answer 1

L'exemple fourni dans le Amazon AWS PHP SDK: sdk-latest\sdk-1.3.5\sdk-1.3.5\_samples\cli-s3_get_urls_for_uploads.php le code suivant fonctionne très bien:

 /* Execute our queue of batched requests. This may take a few seconds to a 
     few minutes depending on the size of the files and how fast your upload 
     speeds are. */ 
    $file_upload_response = $s3->batch()->send(); 

    /* Since a batch of requests will return multiple responses, let's 
     make sure they ALL came back successfully using `areOK()` (singular 
     responses use `isOK()`). */ 
    if ($file_upload_response->areOK()) 
    { 
     // Loop through the individual filenames 
     foreach ($individual_filenames as $filename) 
     { 
      /* Display a URL for each of the files we uploaded. Since uploads default to 
       private (you can choose to override this setting when uploading), we'll 
       pre-authenticate the file URL for the next 5 minutes. */ 
      echo $s3->get_object_url($bucket, $filename, '5 minutes') . PHP_EOL . PHP_EOL; 
     } 
    }