[simonchrz]

Closes #695.

The generic handler appended the query string to the upstream URL and put it in the cache key for every version-pinned path. /generic/github/{owner}/{repo}/releases/download/{tag}/{asset}?a=1, ?a=2 and so on were each fetched and stored as a separate artifact.

• A GitHub release asset with a query now answers 400 before it reaches the upstream. Release assets take no query.
• Configured generic_artifacts keep their query, as Cache configured version-pinned paths of generic upstreams #424 settled: it is passed on and is part of the cache key, since a query such as ?variant= can select a different file.
• The docs now say that generic_paths only checks the path, that a release asset takes no query, and that each distinct query on a configured artifact is stored as a copy of its own until storage.max_size or a generic retention rule removes it.

TestGenericHandler_ServesReleaseAssetCachedUnderUnhashedKey checked that a query on a release asset reached the upstream; that case is now covered by TestGenericHandler_RefusesAQueryOnAReleaseAsset.

Tested with go test ./... and golangci-lint run ./... (0 issues).

Summary by CodeRabbit

• Bug Fixes
  • Requests for GitHub release assets that include a query string now return a 400 error before contacting the upstream service.
  • Version-pinned artifacts are served from cache only for the exact query used to fetch them; different or missing queries do not reuse that cached artifact.
• Documentation
  • Clarified how generic path checks handle query strings, how queries affect version-pinned artifact caching, and which retention settings can remove cached artifacts.

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No actionable comments were generated in the recent review.

Walkthrough

The generic handler now rejects GitHub release-asset requests with non-empty query strings before artifact handling. Tests cover rejection, query-free requests, legacy cache entries, and query-specific caching. Configuration documentation describes query handling and cache retention.

Changes: Generic release-asset query handling

Layer / File(s)	Summary
Identify and reject queried release assets internal/handler/generic.go, internal/handler/generic_test.go, docs/configuration.md	The handler marks parsed GitHub release assets and returns HTTP 400 when their raw query is non-empty. Tests cover rejection, query-free requests, legacy cache behavior, and configured-artifact cache keys. The documentation describes path checks, query handling, and cache retention.

Estimated code review effort: 2 (Simple) | ~10 minutes

Change: Bug fix · Severity of issue fixed: Medium

Suggested reviewers: andrew

Merge Risk: Minimal · up to 8fa9c

This change makes release-asset requests with a query string return 400 and documents the behavior. Configured artifacts still forward queries. No actionable merge risk remains.

Security architecture risk: Minimal · up to 8fa9c

The change rejects queried release-asset requests before upstream access or artifact-cache work. Configured artifacts retain their existing query-specific behavior and cache isolation. No material security risk introduced or worsened by this change was identified.

Retained concerns
No architecture-level concerns identified.

Security review details

Security Blast Radius

• observed — The changed boundary is the generic GET/HEAD download route. For requests classified as release assets, a nonempty query no longer reaches upstream fetching or shared artifact-cache handling. The change does not add an upstream destination or grant additional authority.

Trust Boundaries and Controls

• observed — Configured-upstream lookup and path authorization remain before artifact classification. The new query guard further restricts admission without replacing those controls. Existing cache identity and exact legacy-URL matching prevent reuse of an entry for a different requested upstream URL or query.

Resilience and Maintainability Implications

• inferred — Repeated, concurrent, or interrupted requests taking the new rejection branch cannot leave a partial artifact transition through this handler: the branch returns before legacy lookup, cache-miss coordination, or fetch initiation. Accepted requests retain the existing cache lifecycle and recovery behavior.

Pre-merge checks: 4

Check name	Status	Explanation
Description Check		Check skipped - CodeRabbit’s high-level summary is enabled.
Title check		The title clearly and concisely describes the main change: rejecting query strings on GitHub release asset requests.
Linked Issues check		Issue #695 requires clearer query behavior for generic_paths and identifies refusal or removal of queries on version-pinned paths as an option. The PR documents that generic_paths checks only the …
Out of Scope Changes check		The code, tests, and documentation address issue #695 query handling and cache identity. The release-asset validation prevents duplicate query-based artifact copies. The configured-artifact tests pres…

Full details: Linked Issues check

Explanation

Issue #695 requires clearer query behavior for generic_paths and identifies refusal or removal of queries on version-pinned paths as an option. The PR documents that generic_paths checks only the path. GenericHandler.Routes returns HTTP 400 for a non-empty query on a GitHub release asset before upstream handling. Configured generic_artifacts retain query forwarding and query-specific cache keys. TestGenericHandler_RefusesAQueryOnAReleaseAsset and the configured-artifact query tests cover these behaviors.

Full details: Out of Scope Changes check

Explanation

The code, tests, and documentation address issue #695 query handling and cache identity. The release-asset validation prevents duplicate query-based artifact copies. The configured-artifact tests preserve the documented exception for query-selected files. No unrelated change is demonstrated.

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Prompt to fix all issues

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Inline comments:
Review comments at @internal/handler/generic.go:
- Line 217: Update the release-asset decision in the handler around
parseGitHubReleaseAsset to include the upstream identity, marking assets only
for GitHub upstreams. Preserve normal request forwarding for non-GitHub
upstreams even when their paths match the release-asset pattern.

---

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