content type is wrong for the tasks data get REST API endpoint

[suryapraneeth]

My actions before raising this issue

• [y] Read/searched the docs
• [y] Searched past issues

Expected Behaviour

The content type should be 'image/png' for the /tasks/{id}/data endpoint for the get request

Current Behaviour

The current content type is a list ['image/png', None] for the /tasks/{id}/data endpoint for the get request

Possible Solution

I checked the source code and this happens because mimetypes.guess_type returns the list ['image/png', None] and instead should return mimetypes.guess_type[0]

Steps to Reproduce (for bugs)

1. access the REST API page http://localhost/api/swagger/
2. Try the get request /tasks/{id}/data endpoint with {'type': 'frame', 'quality': 'original'}
3. Response body is not an image instead it returns garbage data

Context

Using the API endpoint to get the frame in HTML in a href tag doesn't work because of the bad content type

Your Environment

• Git hash commit (git log -1): a440ef2