Putting multiple objects in Amazon S3 with different meta data fails - php

Question

I've got an array of file information that is being looped through and using the AWS PHP 2 skd to upload the contents of these files to the cloud, it all works brilliantly until I try and add meta data, at this point, it adds the the metadata to the first object created, but after that I get the following error message:
Fatal error: Uncaught Aws\S3\Exception\SignatureDoesNotMatchException: AWS Error Code: SignatureDoesNotMatch, Status Code: 403, AWS Request ID: 8FC9360F2EB687EE, AWS Error Type: client, AWS Error Message: The request signature we calculated does not match the signature you provided. Check your key and signing method., User-Agent: aws-sdk-php2/2.2.1 Guzzle/3.3.1 curl/7.24.0 PHP/5.3.13 thrown in D:\Inetpub\wwwroot\ThirdParty_Resources\AWS_SDK2\aws\aws-sdk-php\src\Aws\Common\Exception\NamespaceExceptionFactory.php on line 89
I've cropped the code from my loop to highlight the area that is being naughty.
foreach($aFiles as $aFile) {
$arr_ObjectMeta = array(
'OriginalFileName' => $aFile['FileName']
, 'Description' => $aFile['FileDesc']
, 'Keywords' => $aFile['FileKeyW']
);
// get the file to upload
$obj_FileUpload = $obj_S3->putObject($sBucket, $sBucketFolder . $sFilenameToSave, $sFile, 'public-read', $arr_ObjectMeta);
if($obj_FileUpload) {
$files_uploaded++;
} else {
$files_not_uploaded++;
}
// clear the file upload S3 response object
unset($obj_FileUpload);
// delete the downloaded file
unlink($sServerUploadFolder.$sFilenameToSave);
}
So the second time around the loop, it seems to bomb because of the different meta values. When the meta data is the same, the loop executes without issue. Any help/pointers would be great.

Answer 1

You might be confusing the putObject method method with the upload helper method.
The upload helper method is available as of version 2.4 of the SDK. Using the upload method you could do the following:
try {
$sKey = $sBucketFolder . $sFilenameToSave;
$obj_FileUpload = $obj_S3->upload($sBucket, $sKey, $sFile, 'public-read', array(
'Metadata' => $arr_ObjectMeta
));
$files_uploaded++;
} catch (\Aws\S3\Exception\S3Exception $e) {
$files_not_uploaded++;
}
You can do the same thing with the putObject method as well, it is just slightly more verbose.
try {
$obj_FileUpload = $obj_S3->putObject(array(
'Bucket' => $sBucket
'Key' => $sBucketFolder . $sFilenameToSave,
'SourceFile' => $sFile,
'ACL' => 'public-read'
'Metadata' => $arr_ObjectMeta
));
$files_uploaded++;
} catch (\Aws\S3\Exception\S3Exception $e) {
$files_not_uploaded++;
}