fix(node): canonicalize and 404-on-no-match in remove_label (#344) - #390
fix(node): canonicalize and 404-on-no-match in remove_label (#344)#390Ayush7614 wants to merge 2 commits into
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) add_label stored labels trimmed and lowercased, but remove_label passed the path segment through as-is, so a label stored as 'bug' did not match DELETE /repos/{owner}/{repo}/labels/Bug. Worse, remove_label's DB call discarded the row count and the handler always returned 200 with {removed: true}, including when the delete matched nothing — the no-op-rendered-as-success shape the rest of the API rejects. Move trim+lowercase and charset/length validation into a shared canonicalize_label helper used by both handlers, and have db::remove_label return the affected row count so the handler can return 404 when no label was deleted. add_label's behavior is unchanged (idempotent semantics preserved); the only externally observable change is that mixed-case and surrounding-whitespace path segments now match the stored label, and a delete that matches no row returns 404 instead of {removed: true}. Tests: * remove_label_canonicalizes_and_404s_on_no_match exercises the mixed-case path, the trimmed path, the empty-after-trim rejection, the disallowed-charset rejection, and the no-op-returns-404 case. * remove_label_denies_non_owner re-pins the 403 owner-gated shape (matches AGENTS.md: owner-gated mutations return 403 after the repo lookup, distinct from the not-found shape).
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Included review availability: Your plan provides up to 1 included review per hour; 0 remain after this review. 📝 WalkthroughWalkthroughThe change centralizes label canonicalization, validates labels for both handlers, reports missing deletions as ChangesRepository label deletion
Estimated code review effort: 3 (Moderate) | ~20 minutes Merge Risk: ⚪ Minimal · up to The change canonicalizes label removal and returns 404 when no label is deleted while preserving 403 responses for non-owners; no actionable merge-blocking risk remains after normal checks and review. Suggested reviewers: 🚥 Pre-merge checks | ✅ 4 | ❌ 1❌ Failed checks (1 warning)
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In `@crates/gitlawb-node/src/api/labels.rs`:
- Line 72: Update remove_label so require_repo_owner authorizes the caller
before canonicalize_label validates input, ensuring non-owners receive the
owner-gated 403 response even for invalid labels. Add a test covering an
authenticated non-owner submitting an invalid label and assert the exact 403
status.
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crates/gitlawb-node/src/api/labels.rscrates/gitlawb-node/src/db/mod.rscrates/gitlawb-node/src/test_support.rs
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| Extension(auth): Extension<AuthenticatedDid>, | ||
| Path((owner, name, label)): Path<(String, String, String)>, | ||
| ) -> Result<Json<serde_json::Value>> { | ||
| let label = canonicalize_label(&label)?; |
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🔒 Security & Privacy | 🟡 Minor | ⚡ Quick win
Authorize the caller before validating the label.
remove_label returns 400 BadRequest at Line 72 before it loads the repository or calls require_repo_owner. An authenticated non-owner with an invalid label therefore receives 400 instead of the owner-gated 403 response.
Move canonicalization after require_repo_owner, and add a test for an invalid-label request from a non-owner.
Proposed ordering
- let label = canonicalize_label(&label)?;
-
let record = state
.db
.get_repo(&owner, &name)
.await?
.ok_or_else(|| AppError::RepoNotFound(format!("{owner}/{name}")))?;
crate::api::require_repo_owner(&record, &auth.0)?;
+ let label = canonicalize_label(&label)?;As per coding guidelines: owner-only mutations must be gated against the repository owner, and denial tests must assert exact denial statuses. The PR objective also requires 403 responses for non-owners.
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| let label = canonicalize_label(&label)?; | |
| let record = state | |
| .db | |
| .get_repo(&owner, &name) | |
| .await? | |
| .ok_or_else(|| AppError::RepoNotFound(format!("{owner}/{name}")))?; | |
| crate::api::require_repo_owner(&record, &auth.0)?; | |
| let label = canonicalize_label(&label)?; |
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In `@crates/gitlawb-node/src/api/labels.rs` at line 72, Update remove_label so
require_repo_owner authorizes the caller before canonicalize_label validates
input, ensuring non-owners receive the owner-gated 403 response even for invalid
labels. Add a test covering an authenticated non-owner submitting an invalid
label and assert the exact 403 status.
Source: Coding guidelines
beardthelion
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The fix is right and the tests behind it hold up. I checked the guard is load-bearing rather than
taking the green run for it: gutting the if !removed branch flips
remove_label_canonicalizes_and_404s_on_no_match red (200 against an expected 404), inverting the
condition to if removed also goes red the other way, and gutting require_repo_owner flips
remove_label_denies_non_owner red (200 against an expected 403). All three restore green. The label
tests pass at head and CI is green on the current head.
Two things before I approve.
Findings
-
[P2] Pin the 50-character arm of the new helper.
crates/gitlawb-node/src/api/labels.rs:24
Nothing in the suite exercises a label longer than 50 characters. The only bad-request arms under test are
empty-after-trim and disallowed charset, so deleting thelabel.len() > 50clause leaves every
test green. The clause predates this PR, but this is the change that lifts it into a shared helper
two handlers now depend on, so it should carry its own case. A 51-character DELETE asserting 400
plus a 50-character one asserting 404 covers it, and the second has the side benefit of decoupling
the no-match assertion from the delete that precedes it. -
[P3] The description understates the contract change.
crates/gitlawb-node/src/api/labels.rs:83
The body says the only externally observable change is 404-on-no-match. A DELETE carrying a
malformed label now returns 400 where it previously matched nothing and returned
{"removed": true}. Any client cleaning up historically malformed label names sees a new status
class. Worth naming in the description.
On the CodeRabbit thread
I looked at it and I am not asking you to act on it. The ordering it describes is real:
canonicalize_label runs before require_repo_owner, so an authenticated non-owner sending a
malformed label gets 400 rather than 403. But that 400 is a function of the caller's own path
segment and tells them nothing about whether the repo exists, who owns it, or whether the label is
there. The owner gate still sits after the record load and before the mutation, which is where it
belongs.
The bigger reason to leave it: add_label on main already validates before the repo lookup.
Reordering only remove_label would reintroduce exactly the drift between the two handlers that
this PR exists to remove. If we want authorization ahead of input validation as a general rule here,
that is a separate change touching both handlers and it is mine to make, not yours to absorb in this
one.
Push those two and I will take another look.
The helper's length branch had no coverage — 51 chars must 400 and 50 chars must pass validation (404 when absent). This pins the arm lifted into canonicalize_label and decouples the no-match 404 from the double-delete above, as requested in review of Gitlawb#390.
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Thanks for the review @beardthelion Addressed review feedback (pushed P2 – Pin
P3 – Description understates contract change: Ack – a On the CodeRabbit thread
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Re-checked head 24e869f. The len arm you added is load-bearing: gutting label.len() > 50 in canonicalize_label flips the 51-char case red (404 instead of 400). The premise guard and the owner gate still pin as before: gutting if !removed goes red on the double-delete (200 vs 404), gutting require_repo_owner goes red on the stranger case (200 vs 403). remove_label_ tests pass, authz_guard passes (including the remove_label / require_repo_owner( row), CI is green on the current head.
Not an ask, recorded only: the PR description still understates the contract change from round 1 P3. A DELETE with a malformed label now returns 400 where it previously returned removed: true. Worth a one-line note if you edit the body, not a blocker.
On the CodeRabbit thread: unchanged from round 1. canonicalize_label before require_repo_owner means a signed non-owner with a malformed path gets 400 not 403, but that happens before any repo lookup and reveals nothing about existence. add_label already validates before the record load; reordering only remove_label would reintroduce the drift this PR closes. I am not asking you to act on it.
2 participants
Closes #344.
What
add_label(api/labels.rs:24) stored labels trimmed and lowercased, butremove_labelpassed the path segment through as-is, so a label stored asbugdid not matchDELETE /repos/{owner}/{repo}/labels/Bug.Worse,
db::remove_labeldiscarded the row count and the handler always returned 200 +{"removed": true}, including when the delete matched nothing — the no-op-rendered-as-success shape we have been trying to stamp out on the client side.Fix
canonicalize_labelhelper used by both handlers.db::remove_labelreturns the affected row count (Result<bool>) so the handler can return 404 when no label was deleted.add_labelsemantics are unchanged (still idempotent; re-adding an existing label returns 200 withadded: false).The only externally observable change for clients that were already calling
remove_labelwith the canonical form is that one matching nothing now returns 404 instead ofremoved: true.Why not break authz
Both handlers are owner-gated (
require_repo_owner). A non-owner with a real signed request against an existing label still gets 403 — the owner-gated write keeps the existence-leak shape separate from the not-found shape, consistent withadd_labeland the gate rules inAGENTS.md. Tested below.Tests
Two new tests in
crates/gitlawb-node/src/test_support.rs, both passing locally againstcargo test -p gitlawb-node --tests label:remove_label_canonicalizes_and_404s_on_no_match— mixed-case path segment matches the stored label; trimmed path segment matches; empty-after-trim returns 400; disallowed charset returns 400; a second delete of an already-deleted label returns 404, notremoved: true.remove_label_denies_non_owner— non-owner gets 403, the owner-gated mutation shape; the label is still there afterwards.Verification
(Ignored the unrelated pre-existing
clippy::duplicated_attributesatcrates/gitlawb-node/src/api/ipfs.rs:2169— present onupstream/mainbefore this PR.)Summary by CodeRabbit