php – 无法覆盖s3中的内容处置标头

发布时间：2020-12-13 14:15:04 所属栏目：PHP教程来源：网络整理

导读：我正在使用以下php函数为私有文件临时访问公共. function get_s3_signed_url($bucket,$resource,$AWS_S3_KEY,$AWS_s3_secret_key,$expire_seconds) { $expires = time()+$expire_seconds; // S3 Signed URL creation $string_to_sign = "GETnnn{$expires}

我正在使用以下php函数为私有文件临时访问公共.

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

我想添加内容处置标题,以便在用户尝试访问此url时将文件名更改为test.mp3,默认文件名为982jdjd2p3.mp3

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

我尝试将以下代码行添加到该函数中

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

但是当我点击网址时

http://s3.amazonAWS.com/testbucket/982jdjd2p3.mp3?AWSAccessKeyId=***u0026amp;Expires=***u0026amp;Signature=***u0026amp;Content-Disposition=test.mp3

建议的文件名保存为982jdjd2p3.mp3

如何使用此函数覆盖s3 GET请求的内容处置标头？

也可以看看

Amazon S3 Change file download name

编辑

以下是使用此函数使用get请求重命名文件的最新尝试.

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

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

您的函数的问题是标题值应该在最终超链接中编码,但不能用于签名.以下功能纠正了：

function get_s3_signed_url($bucket,$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));

    $string_to_sign = "GETnnn$expiresn/$bucket/$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,true)));

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

（编辑：李大同）

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