2.1 KiB
2.1 KiB
API Stabilization Report
Executive Summary
Phase 4 focused on stabilizing the core API handlers by replacing brittle error handling logic with robust sentinel errors, ensuring consistency across services, and verifying cross-layer interactions with micro-E2E tests.
Key Accomplishments
1. Handler Audits & Repairs
- PlaylistHandler: Replaced string literal checks (
"playlist not found") with sentinel errors (services.ErrPlaylistNotFound). - BitrateHandler: Standardized error responses to use
services.ErrInvalidTrackID,ErrInvalidBitrate, etc. - CommentHandler: Implemented specific error codes (404, 403) for
ErrCommentNotFound,ErrParentCommentNotFound,ErrForbidden. - RoomHandler: Fixed "Blind 404" issue where internal errors were masked. Now distinguishes
ErrRoomNotFoundfrom other errors.
2. Service Layer Refactoring
- Centralized Errors: Created
internal/services/errors.goto consolidate common errors and prevent duplication. - Updated Services:
PlaylistService,BitrateAdaptationService,CommentService,RoomServicenow return consistent, exported sentinel errors wrapping low-level DB errors.
3. Verification & Testing
- Unit/Integration Tests: Updated all affected service and handler tests to assert new error types.
- Micro-E2E Test Suite: Created
internal/handlers/api_flow_test.go(TestAPIFlow_UserJourney) simulating a complete user session:- Artist uploads Track.
- Listener streams (Bitrate Adaptation).
- Listener comments on Track.
- Artist replies.
- Listener attempts unauthorized delete (Fail).
- Listener creates Playlist and adds Track.
Status Checklist
- All defined handlers audit for HTTP semantics.
- Brittle string matching replaced with
errors.Is. - Cross-layer error consistency verified.
- Regression testing via E2E flow.
Recommendations for Phase 5 (Frontend Integration)
- The API is now stable and returns predictable error codes (400, 401, 403, 404).
- Frontend clients should handle
403for permission issues specifically. 404reliably indicates resource missing, not internal error.