I had a problem using Zaps.
I am using Webhooks by Zapider post to upload a file to a service that will process the file, return a new file, and then upload the file to google drive
When I tested it individually, everything worked fine and I could get the questions back.

But it appears when I want to upload a processed new file to Google Drive
Failed to create a file in Google Drive
Error while hydrating data from Webhooks by Zapier: The app returned "None".

I noticed that in both tests, they requested the API.

But the contents of the two messages are different.

I printed the log

Yii::info(print_r($_FILES, true), __METHOD__);

Yii::info(Yii::$app->request->getHeaders()->get('Content-Type'), __METHOD__);

The first result is:

Array

(

    [file] => Array

        (

            [name] => file ... .txt

            [full_path] => file ... .txt

            [type] => text/plain

            [tmp_name] => /tmp/phpoobfJM

            [error] => 0

            [size] => 4

        )

)

multipart/form-data; boundary=—————————————768080016093773413427465

the second result is

Array

(

)

multipart/form-data; boundary=—————————————768080016093773413427465

The file is missing from the parameters of the second request, 

However, I noticed that there is a boundary in the content-type, and the two requests are the same, so should I save the processed file in the server, and I need to return the corresponding file according to the boundary when I request again?

I didn't find this in the document, is this the right way to do it?

Thank you