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Unable to override content header in s3

I use the following php function to provide temporary access to a public file for a private file.

function get_s3_signed_url($bucket, $resource, $AWS_S3_KEY, $AWS_s3_secret_key, $expire_seconds) {
    $expires = time()+$expire_seconds;
    // S3 Signed URL creation
    $string_to_sign = "GET\n\n\n{$expires}\n/".str_replace(".s3.amazonAWS.com","", $bucket)."/$resource";
    $signature = urlencode(base64_encode((hash_hmac("sha1", utf8_encode($string_to_sign), $AWS_s3_secret_key, TRUE))));

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

    return $link = "http://s3.amazonAWS.com/{$bucket}/{$resource}?{$authentication_params}";
}

I wanted to add a header to host the content so that I could change the file name to test.mp3when the user tries to access this URL, which defaults to the file name982jdjd2p3.mp3

$privateUrl = array('privateUrl' => get_s3_signed_url('testbucket', '982jdjd2p3.mp3', $my_aws_key, $my_aws_secret_key, 60));

I tried adding the following line of code to a function

$file_name = 'test.mp3';       
$authentication_params.= "&Content-Disposition={$file_name}";

However, when I click on the URL

http://s3.amazonAWS.com/testbucket/982jdjd2p3.mp3?AWSAccessKeyId=***&Expires=***&Signature=***&Content-Disposition=test.mp3

The proposed file name should be saved as 982jdjd2p3.mp3

How to override content header for s3 GET requests with this function?

see also

Amazon S3 Change File Upload Name

EDIT

Here is the most recent attempt to rename a request file using this function.

function get_s3_signed_url($bucket, $resource, $AWS_S3_KEY, $AWS_s3_secret_key, $expire_seconds) {
    $expires = time()+$expire_seconds;
    // S3 Signed URL creation
    $filename='moot.mp3';
    $disposition = "response-content-disposition=" . urlencode("attachment; filename={$filename}");            

    $string_to_sign = "GET\n\n\n{$expires}\n/".str_replace(".s3.amazonAWS.com","", $bucket)."/$resource";
    $string_to_sign .= "?{$disposition}";
    $signature = urlencode(base64_encode((hash_hmac("sha1", utf8_encode($string_to_sign), $AWS_s3_secret_key, TRUE))));

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

    return $link = "http://s3.amazonAWS.com/{$bucket}/{$resource}?{$authentication_params}";
}
+5
2

, , . :

function get_s3_signed_url($bucket, $resource, $AWS_S3_KEY, $AWS_s3_secret_key, $expire_seconds, $save_as)
{
    $expires = time()+$expire_seconds;
    // S3 Signed URL creation
    $headers = array(
        'response-content-disposition' => 'attachment; filename=' . $save_as,
    );
    $resource = str_replace(array('%2F', '%2B'), array('/', '+'), rawurlencode($resource));

    $string_to_sign = "GET\n\n\n$expires\n/$bucket/$resource";
    $final_url = "http://s3.amazonaws.com/$bucket/$resource?";

    $append_char = '?';
    foreach ($headers as $header => $value) {
        $final_url .= $header . '=' . urlencode($value) . '&';
        $string_to_sign .= $append_char . $header . '=' . $value;
        $append_char = '&';
    }

    $signature = urlencode(base64_encode(hash_hmac('sha1', $string_to_sign, $AWS_s3_secret_key, true)));

    return $final_url . "AWSAccessKeyId=$AWS_S3_KEY&Expires=$expires&Signature=$signature";
}
+10

Content-Disposition , disposition-type.

: Content-Disposition: attachment; filename=test.mp3;

response-content-disposition :

$disposition = "response-content-disposition=" . urlencode("attachment; filename={$filename}");
/* ... */
$string_to_sign .= "?{$disposition}";
/* ... */
$authentication_params.= "&{$disposition}";
+1

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