jojo/routers/common
Mathieu Fenniak 9f7533c1f1 refactor: clarify four different outputs that authentication methods provide (#12231)
#12202 began a refactor of Forgejo's authentication implementations by providing structured data on an authentication success.  However, error cases were maintained as-is in that refactor, leaving a complex situation: what does returning an error from an authentication method mean?; does it mean that the authentication failed, or that a server error occurred?  Can another authentication still be tried?

This PR changes authentication methods so that they can return one of four things:
- `AuthenticationSuccess` with an authentication result.
- `AuthenticationNotAttempted` which indicates that no credentials relevant for this authentication method were presented.  If every method returned `AuthenticationNotAttempted`, then you would have an unauthenticated access.
- `AuthenticationAttemptedIncorrectCredential` which indicates that credentials were present and failed validation -- a situation indicating a `401 Unauthorized`.
- `AuthenticationError` which indicates that an internal server error occurred and failed authentication -- indicating a `500 Internal Server Error`.

This paves the way for one more refactor coming next: `basic.go` and `oauth2.go` perform 3-4 different authentications each (access tokens, oauth JWTs, actions tokens, actions JWTs, and username/password).  With the capability to return these more precise responses, these authentication methods can be split up into separate logic that isn't intertwined together.

## Checklist

The [contributor guide](https://forgejo.org/docs/next/contributor/) contains information that will be helpful to first time contributors. All work and communication must conform to Forgejo's [AI Agreement](https://codeberg.org/forgejo/governance/src/branch/main/AIAgreement.md). There also are a few [conditions for merging Pull Requests in Forgejo repositories](https://codeberg.org/forgejo/governance/src/branch/main/PullRequestsAgreement.md). You are also welcome to join the [Forgejo development chatroom](https://matrix.to/#/#forgejo-development:matrix.org).

### Tests for Go changes

- I added test coverage for Go changes...
  - [ ] in their respective `*_test.go` for unit tests.
  - [ ] in the `tests/integration` directory if it involves interactions with a live Forgejo server.
  - Relying on existing test suite, with changes for any compile errors -- the next refactor will simplify the auth methods so that they can be unit tested easily.
- I ran...
  - [x] `make pr-go` before pushing

### Documentation

- [ ] I created a pull request [to the documentation](https://codeberg.org/forgejo/docs) to explain to Forgejo users how to use this change.
- [x] I did not document these changes and I do not expect someone else to do it.

### Release notes

- [ ] This change will be noticed by a Forgejo user or admin (feature, bug fix, performance, etc.). I suggest to include a release note for this change.
- [x] This change is not visible to a Forgejo user or admin (refactor, dependency upgrade, etc.). I think there is no need to add a release note for this change.

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/12231
Reviewed-by: Gusted <gusted@noreply.codeberg.org>
2026-04-23 02:30:41 +02:00
..
auth.go refactor: clarify four different outputs that authentication methods provide (#12231) 2026-04-23 02:30:41 +02:00
compare.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
db.go chore: rename 'migrations' to 'gitea_migrations' 2025-10-14 14:40:49 -06:00
errpage.go chore: move template context (#8663) 2025-07-25 11:55:15 +02:00
errpage_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
markup.go feat: match on compound filename extensions (#11439) 2026-03-19 01:25:51 +01:00
middleware.go Improvement: Do not set session cookie for empty session 2026-03-11 04:18:06 +01:00
middleware_test.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
redirect.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00
search.go chore: fix typos throughout the codebase (#10753) 2026-01-26 22:57:33 +01:00
serve.go chore: branding import path (#7337) 2025-03-27 19:40:14 +00:00