Fix content-type not found error

[hungpham3112]

See https://stackoverflow.com/questions/37339644/content-type-is-blank-in-the-headers-of-some-requests for more information

Need to check before merge.

This PR will solve the problem in serengil/deepface#769

[wkentaro]

Looking at the PR in deepface, seems it's env problem, so closing for now.

[hungpham3112]

Looking at the PR in deepface, seems it's env problem, so closing for now.

Hi @wkentaro . Can you look at the PR again? Deepface using gdown for downloading from google drive. This is a bug with gdown, not deepface. They are not related to this problem so they already closed issue.

[wkentaro]

@hungpham3112 Okay. Can you give a command to reproduce this?

[hungpham3112]

@wkentaro. I used deepface as a way to reproduce the problem.

Step 1: Download deepface
pip install deepface dlib
Step 2: Run below code

  from deepface import DeepFace
  detected_face = DeepFace.extract_faces("./obama.jpg", detector_backend = 'dlib')

and see the problem. The code in gdown default assumes ["content-type"] is always available.

[wkentaro]

@hungpham3112 I was able to reproduce it. Fixing by #302

gdown http://dlib.net/files/shape_predictor_5_face_landmarks.dat.bz2