Fix http/https behind proxy

[albadrun]

This issue is a:

• [x] refactor request

Current behavior: Flask redirect url_for with http scheme because of nginx proxy. Need to solve this in a better way. Now using url_for_custom as workaround to fix this problems. See the code here.

Requested behavior: Any way better than existing.

Why this behavior is better: No need to modify built in function.

[aselhid]

have you tried setting X-Forwarded-Proto header from nginx to your desired schema? Based on this link flask can automatically set your schema based on that header

[satraul]

Has this been fixed? Please document how you solved this issue @albadrun