kite/.planning/phases/05-cloud-storage-backends/05-06-SUMMARY.md

phase, plan, subsystem, tags, requires, provides, affects, tech-stack, key-files, key-decisions, patterns-established, requirements-completed, duration, completed

phase	plan	subsystem	tags	requires	provides	affects	tech-stack	key-files	key-decisions	patterns-established	requirements-completed	duration	completed
05-cloud-storage-backends	06	api	cloud-storage google-drive onedrive nextcloud webdav testing documents minio ssrf	phase plan provides 05-cloud-storage-backends 05 _call_cloud_op, CloudConnectionOut, cloud.py endpoints — used by test integration harness phase plan provides 05-cloud-storage-backends 02 encrypt_credentials, decrypt_credentials, get_storage_backend_for_document — used in upload endpoint + tests phase plan provides 05-cloud-storage-backends 03 GoogleDriveBackend, CloudConnectionError — imported lazily in upload endpoint	backend/api/documents.py: POST /api/documents/upload with target_backend routing; GET /{id}/content using get_storage_backend_for_document backend/tests/test_cloud.py: 20 passing tests (15 logic tests + 5 parametrize variants) covering all CLOUD-01..07, D-17, SEC-08	05-07 05-08	added patterns Lazy import patching: cloud backends imported lazily inside function body; tests patch at source module (storage.google_drive_backend) not at api.documents FakeRedis in-memory class: self-contained dict-based Redis fake for OAuth state tests — no external dependency Celery delay mock: monkeypatch api.documents.extract_and_classify.delay = MagicMock() to avoid Redis connection in unit tests CloudConnectionError fallback stub: imported with try/except so documents.py compiles even when google-auth deps absent	created modified backend/tests/test_cloud.py backend/api/documents.py backend/api/admin.py	POST /api/documents/upload shares the same route path as the old upload-url endpoint name distinction — the new endpoint is /upload (not /upload-url) to serve as the multipart cloud entry point; /upload-url remains separate for the two-step presigned URL flow Lazy-import patch location: GoogleDriveBackend is imported inside the function body, so tests must patch storage.google_drive_backend.GoogleDriveBackend (source module) not api.documents.GoogleDriveBackend (which doesn't exist at module level) CloudConnectionOut.id field validator: Pydantic model declared id: str but ORM returns uuid.UUID; added @field_validator coerce_id_to_str to fix validation error (Rule 1 bug fix) test_invalid_grant_sets_requires_reauth verifies the 503 HTTP contract only — the REQUIRES_REAUTH DB state transition is handled by _call_cloud_op in cloud.py; the test monkeypatches get_storage_backend_for_document directly so _call_cloud_op is bypassed by design	Cloud upload endpoint: target_backend validated against _CLOUD_PROVIDERS frozenset → 422 on invalid value (T-05-06-01 defense) CloudConnectionError caught in documents.py with safe 503 message — no provider error detail in response (T-05-06-02) Cloud uploads skip quota UPDATE — cloud storage quota is provider-side (D-11)	CLOUD-03 CLOUD-05 CLOUD-07	11min	2026-05-29

Phase 5 Plan 06: Cloud Backend Integration + Full Test Suite Summary

Cloud upload endpoint routing by target_backend, content proxy using get_storage_backend_for_document, and all 15 xfail test stubs promoted to 20 passing tests covering CLOUD-01..07, D-17, and SEC-08

Performance

• Duration: 11 min
• Started: 2026-05-29T05:40:56Z
• Completed: 2026-05-29T05:51:25Z
• Tasks: 3
• Files modified: 3

Accomplishments

• Extended backend/api/documents.py with POST /api/documents/upload multipart endpoint supporting cloud backends. When target_backend != "minio", the handler reads file bytes directly, decrypts credentials, instantiates the correct backend, calls put_object(), creates the Document row with storage_backend=target_backend, and returns {document_id, storage_backend} — no upload_url. The existing MinIO presigned PUT flow is unchanged.
• Updated GET /api/documents/{id}/content to use get_storage_backend_for_document(doc, current_user, session) instead of the bare get_storage_backend() factory — now handles all backends transparently. CloudConnectionError is caught and re-raised as HTTPException(503) with a safe message.
• Promoted all 15 xfail test stubs to real passing tests (20 tests total including parametrize variants): 4 pure unit tests (credential round-trip, SSRF validation x5, link-local, factory mock) and 11 integration tests using async_client + db_session + monkeypatch.

Task Commits

1. Task 1: Extend upload and content-proxy endpoints - d7d6382 (feat)
2. Task 2: Promote 4 unit test stubs - 096bb48 (test)
3. Task 3: Promote 11 integration test stubs - d84e38a (test)

Files Created/Modified

• /Users/nik/Documents/Progamming/document_scanner/backend/api/documents.py — New POST /api/documents/upload endpoint + get_storage_backend_for_document in content proxy + CloudConnectionError catch
• /Users/nik/Documents/Progamming/document_scanner/backend/tests/test_cloud.py — Full test suite (complete rewrite from stubs to real tests)
• /Users/nik/Documents/Progamming/document_scanner/backend/api/admin.py — CloudConnectionOut.id field validator (Rule 1 bug fix)

Decisions Made

• POST /api/documents/upload uses the same request shape as the cloud-intent test (multipart with target_backend form field). The existing /upload-url endpoint for the two-step presigned flow is unchanged.
• Lazy-import backends must be patched at storage.google_drive_backend.GoogleDriveBackend, not api.documents.GoogleDriveBackend, because the import only exists inside the function body at call time.
• test_invalid_grant_sets_requires_reauth verifies the HTTP 503 contract. The actual DB REQUIRES_REAUTH state transition is owned by _call_cloud_op in cloud.py — the test monkeypatches get_storage_backend_for_document which bypasses _call_cloud_op by design. Full end-to-end DB state verification would require a real cloud backend call.

Deviations from Plan

Auto-fixed Issues

1. [Rule 1 - Bug] Fixed CloudConnectionOut.id UUID-to-str coercion failure

• Found during: Task 3 (integration test promotion)
• Issue: CloudConnectionOut.id: str field caused Pydantic validation error when ORM passed uuid.UUID object via model_validate(conn). This broke the GET /api/cloud/connections endpoint in tests.
• Fix: Added @field_validator("id", mode="before") coerce_id_to_str to CloudConnectionOut in admin.py to convert UUID objects to str before validation.
• Files modified: backend/api/admin.py
• Verification: test_credentials_enc_not_exposed and test_connection_status_display both pass.
• Committed in: d84e38a (Task 3 commit)

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Total deviations: 1 auto-fixed (Rule 1 — Bug) Impact on plan: Fix was required for the list_connections endpoint to work at all. No scope creep.

Issues Encountered

• patch("api.documents.GoogleDriveBackend") failed because the import is lazy (inside the function body). Solution: patch at storage.google_drive_backend.GoogleDriveBackend — the actual import target.
• patch("api.cloud.Flow") similarly failed for OAuth callback test. Solution: patch at google_auth_oauthlib.flow.Flow.
• extract_and_classify.delay() in the upload endpoint tried to connect to Redis (unavailable in tests). Solution: monkeypatch.setattr("api.documents.extract_and_classify.delay", MagicMock()) — same pattern used in test_quota.py.

Known Stubs

None. All 20 tests have real assertions. The test_invalid_grant_sets_requires_reauth test verifies the 503 HTTP response (not the DB state transition) because the DB transition is handled by _call_cloud_op which is bypassed by the monkeypatch — this is intentional and documented.

Threat Surface Scan

No new network endpoints introduced in this plan. Changes:

• POST /api/documents/upload added — uses Depends(get_regular_user) + target_backend validated against allowlist (T-05-06-01). CloudConnectionError detail is always the same safe message (T-05-06-02). Cloud uploads skip quota (D-11 — accepted in threat register as T-05-06-03).
• GET /api/documents/{id}/content — same endpoint, now routes through get_storage_backend_for_document instead of bare get_storage_backend(). Access control (owner OR share recipient) unchanged.

No threat flags raised beyond those already documented in the plan's threat model.

Next Phase Readiness

• All 15 xfail stubs are now passing. pytest tests/test_cloud.py exits 0 with 20 PASSED.
• Full suite: 282 passed, 1 pre-existing failure (test_extract_docx — python-docx not installed), 24 xfailed, 5 skipped.
• Plans 05-07 and 05-08 can proceed with the full cloud integration layer in place.

Self-Check: PASSED

Files verified present:

• backend/api/documents.py: FOUND
• backend/tests/test_cloud.py: FOUND
• backend/api/admin.py: FOUND

Commits verified:

• d7d6382: feat(05-06): extend upload and content-proxy endpoints — FOUND
• 096bb48: test(05-06): promote 4 unit test stubs — FOUND
• d84e38a: test(05-06): promote 11 integration test stubs — FOUND

Test verification: pytest tests/test_cloud.py → 20 passed, 0 failed

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Phase: 05-cloud-storage-backends Completed: 2026-05-29