AWS SDK base_url Questions

aws-sdk.php

<?php

// Configuration, using AWS SDK 2.6.16
return [
    'includes' => ['_aws'],
    'services' => [
        'default_settings' => [
            'params' => [
                'key' => 'xxx',
                'secret' => 'yyyy',
                'base_url' => 'http://files.example.com'
            ]
        ]
    ]
];

// Assume $s3Client is constructed with config above.
$result = $s3Client->putObject([
    'Bucket' => 'files.example.com',
    'Key' => 'image.jpg',
    'SourceFile' => '/path/to/image.jpg',
    'ContentType' => 'image/jpeg',
    'ACL' => CannedAc::PUBLIC_READ
]);

// Receive this error:
// [curl] 6: Couldn't resolve host 'files.example.com.files.example.com' [url] http://files.example.com.files.example.com/image.jpg
// It seems it attempts to create the URL as: scheme://<bucket-name>.<base-url>.
// If you have a CNAME that points files.example.com to files.example.com.s3.amazonaws.com this won't work.

@jeremeamia 1 year later and I'm finding this info useful. I setup cname with aws sdk php using this information here:

aws/aws-sdk-php#347

The getObjectUrl works fine yet the upload part gives me the exact same issue as described above. I will try your solution now. I wonder if this is caused by me using SDK 2?