OAuth POST routes not using base path

[h3kker]

• Gitea version (or commit ref): 1.9.4
• Git version: 2.22.0
• Operating system: alpine 3.10.2
• Database (use [x]):
  • [ x] PostgreSQL
  • MySQL
  • MSSQL
  • SQLite
• Can you reproduce the bug at https://try.gitea.io:
  • Yes (provide example URL)
  • No
  • [x ] Not relevant
• Log gist:

Description

We have a gitea installation (docker) behind a reverse proxy, accessible under a subpath, like https://example.com/repo/ (setting ROOT_URL = https://example.com/repo/)

This works well, but recently I tried to use an OAuth application (drone). I get the redirect to the gitea server to https://example.com/repo/login/oauth/authorize, but when I do click the "Authorize Application" button, the POST request goes to the base URL (without /repo) instead: https://example.com/login/oauth/authorize.

The same thing happens in the settings on the configuration page https://example.com/repo/user/settings/applications/oauth2/1
Clicking on the Save button sends the POST request to http://example.com/user/settings/applications/oauth2/1

I could not see any configuration settings (besides ROOT_URL) where I could set this up, but maybe I've missed something - in that case I'm sorry (and grateful for a pointer).

Thanks,
Heinz

[h3kker]

sorry, duplicate of #8461 opened just hours before I did...