[QUESTION] variable (file) field

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Description

I’m looking for what’s the best way to have a function accept a multipart/form-data file in different configurations:

a) a specific form field like photo or movie? The file has to be uploaded as photo field then. I need to support a request like this:

requests.post(
 url='http://localhost/test',
 files=[{'photo': ('foo.png', open('foo.png', 'rb'), 'image/png')}],
)

b) be able to name the file to use, e.g. photo="attach://somefield". The request would look like:

requests.post(
  url='http://localhost/test',
  params={'photo': 'attach://random_key_banana'},
  files=[{'random_key_banana': ('foo.png', open('foo.png', 'rb'), 'image/png')}],
)

In both cases I’d like to end up with a variable photo containing the uploaded file (how doesn’t matter, I’m happy with anything like a tmp file path, a python file-like, or even a raw bytearray)

I feel like I could handle a) with

photo: UploadFile = File(...)

But how can I receive files in arbitrary fields like need for b)? The only thing I could think of is

**kwargs: Dict[str, UploadFile] = List([File(...)])

but obviously that doesn’t work.

[phy25]

You can start by reading fastapi code since I guess that’s a bit low level, but you can start with https://fastapi.tiangolo.com/advanced/using-request-directly/

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