Replicate CURL multipart/form-data request with Guzzle / League OAuth2 Client - oauth-2.0

Question

I am attempting to replicate a CURL POST request in Guzzle, but Guzzle request is failing.
This is the CURL request that works successfully:
$file = new \CURLFile( $document );
$file->setPostFilename( basename( $document ) );
$ch = curl_init();
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
curl_setopt( $ch, CURLOPT_URL, $endpoint );
curl_setopt( $ch, CURLOPT_HTTPHEADER, [
"Authorization: Bearer " . $accessToken,
"Content-Type: multipart/form-data",
] );
curl_setopt( $ch, CURLOPT_POSTFIELDS, [ 'fileData' => $file ] );
$response = curl_exec( $ch );
And here is what I am currently using for the Guzzle request but it does not work:
$options['multipart'][] = [
'name' => 'fileData',
'contents' => fopen( $document, 'r' ),
'filename' => basename( $document ),
];
$request = $provider->getAuthenticatedRequest( 'POST', $endpoint, $accessToken, $options );
$response = $provider->getParsedResponse( $request );
The response from the Guzzle request is as follows:
{"message":"File cannot be empty","errors":[{"code":"Missing","fields":["document"]}]}
It's worth noting I am using the thephpleague/oauth2-client library to send the request. I'm looking for any discrepencies between the two request or information on how I can troubleshoot this further myself as I have been spinning my wheels all day on this. Much appreciated

Answer 1

thephpleague/oauth2-client uses different Providers to create the requests and these Providers implement AbstractProvider
The argument $options of AbstractProvider 's getAuthenticatedRequest() is different from GuzzleHttp\Client 's request():
/**
* Returns an authenticated PSR-7 request instance.
...
* #param array $options Any of "headers", "body", and "protocolVersion".
* #return RequestInterface
*/
public function getAuthenticatedRequest($method, $url, $token, array $options = [])
Only keys allowed for $options are "headers", "body", and "protocolVersion".
You should do the extra effort and create the headers and body needed:
$file = new \CURLFile( $document );
$file->setPostFilename( basename( $document ) );
$data = array(
'uploaded_file' => $file
);
$options = array(
'headers' => array("Content-Type" => "multipart/form-data"),
'body' => $data
);
$request = $provider->getAuthenticatedRequest( 'POST', $endpoint, $accessToken, $options );
Reference
Send file via cURL from form POST in PHP