Cannot catch AWS S3 exception

Question

I'm trying to get the filesize of an S3 object using the Stream API with the following code:

try{
    $fileSize = filesize("s3://".$bucket."/".$filename);
}catch(Aws\S3\Exception\NoSuchKeyException $e) {
    return false;
}

If the key doesn't exist I get the following error:

[Tue Oct 13 23:03:32 2015] [error] [client 54.225.205.152] PHP Warning: File or directory not found: s3://mybucket/myfile.jpg in /var/www/vendor/aws/aws-sdk-php/src/Aws/S3/StreamWrapper.php on line 774

[Tue Oct 13 23:03:32 2015] [error] [client 54.225.205.152] PHP Warning: filesize(): stat failed for s3://mybucket/myfile.jpg in /var/www/api-dev/awsFunc.php on line 278

[Tue Oct 13 23:03:32 2015] [error] [client 54.225.205.152] PHP Fatal error: Uncaught Aws\S3\Exception\NoSuchKeyException: AWS Error Code: NoSuchKey, Status Code: 404, AWS Request ID: 4A6F1372301D02F7, AWS Error Type: client, AWS Error Message: The specified key does not exist., User-Agent: aws-sdk-php2/2.8.21 Guzzle/3.9.3 curl/7.22.0 PHP/5.3.10-1ubuntu3.19\n thrown in /var/www/vendor/aws/aws-sdk-php/src/Aws/Common/Exception/NamespaceExceptionFactory.php on line 91

So, although I explicitly try to catch the Aws\S3\Exception\NoSuchKeyException the system throws it anyway.

UPDATE:

I found the error. The exception should namespace should start with '\' instead of Aws, like that:

try{
    $fileSize = filesize("s3://".$bucket."/".$filename);
}catch(\Aws\S3\Exception\NoSuchKeyException $e) {
    return false;
}

I don't know though why when I use a namespace the namespace doesn't start with '\' but in the exception it needs it. I'd like someone to explain.

Solution 1

Ok so here is what worked for me:

use Aws\S3\Exception\S3Exception as S3;


try {
    $podcast = $this->uploadFileToS3($request);
} catch(S3 $e) {
    return $e->getMessage();
 }

In my case, i passed the message to a session flash like so:

 return redirect('dashboard/episode/create')->with('status', $e->getMessage());

So it all depends on how you want to use it.

try {
    $fileSize = filesize("s3://".$bucket."/".$filename);
} catch(S3 $e) {
    return $e->getMessage();
 }

Good Luck!

Solution 2

This is the right way. 😉

use Aws\Exception\AwsException;

try{
    // something
}catch(AwsException $e){
    echo 'Caught exception: ',  $e->getMessage(), "\n";
}

Solution 3

You can make use of AWSException class getAwsErrorMessage() method So you could do

use Aws\S3\Exception\S3Exception;
 try {
     // Your Code       
 } catch (S3Exception $e) {
     return $e->getAwsErrorMessage();
 }

Comments

[Mircea]

Possible duplicate of Handling errors in AWS PHP SDK 2

[Vasilis]

I don't think it's duplicate, the answers in the above question suggest to use what I'm already using but the exception isn't caught

[Vasilis]

Thanks. Do you know why the namespace doesn't require to be declared in the global scope with the leading slash when using use, but inside the catch it requires the leading slash?

[Maverick]

Maybe you haven't correctly declared the namespace in use line. If you did that there's non need for the leading slash in catch. My example works without it. Read this answer maybe it can help you. ;)