Problem: 404 on successful login via OIDC if web_host config option is empty

[MatthewHana]

Issue

Problem
If Semaphore is hosted without a subpath such as https://semaphoreserver.local:9999/ then according to the config docs the relevant option for the setting web_host should not have a trailing slash and should be empty in the config.

When logging in via OIDC (and perhaps other OAuth mechanisms) a successful auth flow returns the user to https://https://semaphoreserver.local:9999/api/auth/oidc/oidcprovidername/ with a HTTP 404 error and fails to redirect them to the Semaphore UI. Navigating away from this page to a URL such as https://semaphoreserver.local:9999/project/1/history works, which shows that the user has logged in successfully.

Cause & Workaround
After changing the web_host config value to "/" and restarting Semaphore, the user is now properly redirected upon a successful auth flow. I am not sure if this has any other negative impacts.

This behaviour could potentially be the cause for issues #1434, #2659, and #2666👿.

Impact

Web-Frontend (what users interact with), Web-Backend (APIs)

Installation method

Package

Database

BoltDB

Browser

Chrome

Semaphore Version

2.11.2-0e9490c-1735214524

Ansible Version

Not relevant.

Logs & errors

No response

Manual installation - system information

OS: Debian
Reverse proxy: Nginx

Configuration

No response

Additional information

No response

[MatthewHana]

Update: Workaround resolved issues #2659 and #2666- showing that all three issues have the same root cause.