s3client php,访问被拒绝 - 使用预签名URL的S3资源 - PHP SDK
我正在生成一个预签名URL，允许用户从S3存储桶下载文件 . 我使用以下代码通过PHP SDK生成URL：
public static function get_content_link( $bucket, $key ) {
//check response code from AWS
require_once 'aws/aws-autoloader.php';
$s3 = new Aws\S3\S3Client([
'version' => 'latest',
'region' => 'eu-west-1',
'credentials' => [
'key' => 'MY-KEY',
'secret' => 'MY-SECRET',
],
]);
$cmd = $s3->getCommand('GetObject', [
'Bucket' => $bucket,
'Key' => $key
]);
$request = $s3->createPresignedRequest($cmd, '+500 minutes');
// Get the actual presigned-url
$presignedUrl = (string) $request->getUri();
return $presignedUrl;
}
URL按预期返回，例如：
https://s3-eu-west-1.amazonaws.com/MY-BUCKET-NAME/product/3166_1480009917388.mov?x-amz-content-sha256=unsigned-payload&x-amz-algorithm=aws4-hmac-sha256&x-amz-credential=akiaiqrmkn276hcpjkaq%2f20161127%2feu-west-1%2fs3%2faws4_request&x-amz-date=20161127t145603z&x-amz-signedheaders=host&x-amz-expires=30000&x-amz-signature=98eaef504f053ca56908ac49c6539c4a8b8e250d7d3a4a12460f4a806ec41c19
当我尝试在浏览器中打开任何返回的链接时，我收到来自S3的访问被拒绝错误：
AccessDenied
Access Denied
A37839BB23186F72
yvKTN+CN1TTNk2tqoxxm3MPOGTUSMaRYtbbEFeCzGP7ou5IYf37Z9uBESwUQWDIUR1GUuPbZyuM=
我想要提供访问权限的文件位于一个包含允许公共访问的文件夹的存储桶中，我尝试访问的文件夹是私有的(称为/ product /) . 我们的存储桶策略如下所示：
{
"Version": "2008-10-17",
"Statement": [
{
"Sid": "AllowPublicReadProxies",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::MY-BUCKET-NAME/proxies*"
},
{
"Sid": "AllowPublicReadThumbs",
"Effect": "Allow",
"Principal": {
"AWS": "*"
},
"Action": "s3:GetObject",
"Resource": "arn:aws:s3:::MY-BUCKET-NAME/thumbs*"
}
]
}
我的理解是，创建预签名URL的目的是允许未经身份验证的用户临时访问受保护的文件，而无需修改存储桶或文件夹权限 .
有没有人对我错过或做错了什么有任何想法？
谢谢！