400 Bad Request

Question

The call to AWS Rekognition API request "describeCollection" returns "400 Bad Request" and crashes instead of throwing an exception. An invalid collection ID is NOT a fatal error. Why doesn't the API throw an exception? Here's my code:
try {
    		    $result = $aws_client->client->describeCollection([
                    'CollectionId' => $collection_id, // REQUIRED
                    ]);
    		    }
    		catch( ResourceNotFoundException $e ) {
    		    $errmsg = "describeCollection exception:" . $e-getMessage();
                return;
    		}
            catch ( Exception $e ) {
                $errmsg = "describeCollection exception:" . $e-getMessage();
                return;
            }
An here's the response:
Aws \ Rekognition \ Exception \ RekognitionException PHP 8.1.18 10.10.0
Error executing "DescribeCollection" on "https://rekognition.ap-southeast-2.amazonaws.com"; AWS HTTP error: Client error: `POST https://rekognition.ap-southeast-2.amazonaws.com` resulted in a `400 Bad Request` response: {"__type":"ResourceNotFoundException","Code":"ResourceNotFoundException","Message":"Collection:dev_gallery_32 not found! (truncated...) ResourceNotFoundException (client): Collection:dev_gallery_32 not found! - {"__type":"ResourceNotFoundException","Code":"ResourceNotFoundException","Message":"Collection:dev_gallery_32 not found!"}

Answer

Hi Paul,

From AWS SDK PHP reference below, the client would throw a RekognitionException, and "ResourceNotFoundException" is the errorType within the exception.

Could you try if the following modification works?

```
try { 
  $result = $aws_client->client->describeCollection([ 'CollectionId' => $collection_id, // REQUIRED ]); 
} catch( RekognitionException $e ) { 
  $errortype = $e->getAwsErrorType();
  return; 
}
```

https://docs.aws.amazon.com/aws-sdk-php/v3/api/class-Aws.Rekognition.Exception.RekognitionException.html

400 Bad Request

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