Zf2 - How to create request to external API with file upload - rest

Question

I have a Zf2 application that communicates with another Zf2 application through RestAPI calls.
I'm able to communicate between one to another using following code and exchange parameters:
//Prepare request
$request = new Request();
$request->getHeaders()->addHeaders(array(
'Content-Type' => 'application/x-www-form-urlencoded; charset=UTF-8'
));
$request->setUri($p_url);
$request->setMethod('POST');
$request->setPost(new Parameters($p_params));
$client = new Client();
//Send request
$client->resetParameters();
$response = $client->dispatch($request);
$data = json_decode($response->getBody(), true);
Now, I would like to do the same thing but with a multipart call: Json + files.
How can I do that?
I have tried several solutions from using setFileUpload method of client to writing headers parameters with content-type (multipart/form-data), content-disposition, ... without success.
Along my tests, I used Wireshark to check the request contents. Depending on the solution I tried, I fail in situation with "missing boundary" or HTTP error 405.
Thanks for your help.
Best

Answer 1

Finally, I found a solution
$this->_client->setUri($p_url);
$this->_client->setMethod('POST');
//Prepare for upload
$this->_client->setFileUpload($p_file, 'file');
//Set parameters along with file
$this->_client->setParameterPost($p_params);
//Send request
try {
$response = $this->_client->send();
} catch ( \Exception $ex ) {
}