A 'contents' key is required while uploading a file using Http client - laravel

Question

I am struggling with a weird problem. I am trying to upload a file to a different server using the API. I am using Laravel 8.X and Using HTTP client for the same. Below is my code which I am calling from a controller
if ($request->hasFile('uploadReceipt') && $request->file('uploadReceipt')->isValid()) {
$receiptContent = file_get_contents($request->file('uploadReceipt'));
$originalName = $request->file('uploadReceipt')->getClientOriginalName();
$responseUploadReceipt = Http::attach('attachment', $receiptContent, $originalName)
->withHeaders([
'Accept'=> 'application/json',
'Authorization' => 'Bearer '.$userAccessToken
])
->post($endpoint, $requestData);
dd($responseUploadReceipt->json());
} else {
dd ("Else");
}
I am getting A 'contents' key is required, in the file vendor/guzzlehttp/psr7/src/MultipartStream.php:86
I spent almost 12 hrs on it but unable to resolve this issue. I also tried with the stream like
$receiptContent = fopen($request->file('uploadReceipt'), 'r');
but the same issue. I followed the same way it is mentioned in the documentation. Anyone who can help me with this will be appreciated.
Thanks and Regards
Ashish

Answer 1

You were probably using multipart in conjunction with form_params , this is not explicitly explained in the documentation of laravel but guzzle won't work with both
Note
multipart cannot be used with the form_params option. You will need to
use one or the other. Use form_params for
application/x-www-form-urlencoded requests, and multipart for
multipart/form-data requests.
This option cannot be used with body, form_params, or json
To solve this problem you will need to parse all the params to multipart, if you are using laravel or lumen you can do it in this way
if(!empty($this->files))
{
//if there is an image parse all the rest parameters to
multipart
$file_keys=array_keys($this->files);
foreach($this->files as $k => $file)
{
$http = $http->attach($k, file_get_contents($file),$k);
}
foreach($this->data as $dk =>&$d)
{
if(!in_array($dk,$file_keys))
{
if(is_array($d))
{
$d=json_encode($d);
}
$http = $http->attach($dk,$d);
}
}
//if there isn't any file just send all as form_params
return $http=$http->post($this->url);
}
return $http=$http->post($this->url,$this->data);
https://docs.guzzlephp.org/en/stable/request-options.html#multipart

Answer 2

I think this line is the problem:
$receiptContent = file_get_contents($request->file('uploadReceipt'));
The examples in the documentation do not use the Request. $request->file('uploadReceipt') should return an instance of Illuminate\Http\UploadedFile and I'm pretty sure file_get_contents doesn't work with an UploadedFile as a parameter.
Digging deeper into the class file, it seems there is a method to get the UploadedFile's contents:
Illuminate\Http\UploadedFile
/**
* Get the contents of the uploaded file.
*
* #return false|string
*
* #throws \Illuminate\Contracts\Filesystem\FileNotFoundException
*/
public function get()
{
if (! $this->isValid()) {
throw new FileNotFoundException("File does not exist at path {$this->getPathname()}.");
}
return file_get_contents($this->getPathname());
}
Try $receiptContent = $request->file('uploadReceipt')->get(); instead.