Remove query secrets from document-fetch error messages
A signed download URL appears in an operator error message after a timeout.
- Focused work estimate
- 1h 15m + prerequisites
- Priority in the scenario
- High
- Engineering practice
- Privacy · Error handling
Estimated field mix
- Privacy engineering50%
- Security50%
Field percentages are editorial estimates of the ticket's engineering focus. They total 100%; they are not measured time, proficiency scores, or ownership evidence.
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Project context
A fictional knowledge service imports documents from customer-entered URLs. The importer follows redirects and trusts response metadata too broadly.
Setup prerequisites
- Build a local fetch adapter and controlled HTTP test servers.
- Use synthetic documents and deny network access outside the test allowlist.
Preceding work
Complete these dependencies, or supply their agreed outputs before taking this ticket.
- AFETCH-101 · Accept only explicitly supported document URL schemes
- AFETCH-102 · Bind document import requests to tenant-owned destination policies
- AFETCH-103 · Reject private and special-use destination addresses before connection
- AFETCH-104 · Revalidate every document redirect before following it
- AFETCH-105 · Enforce byte and time limits while streaming imported documents
- AFETCH-106 · Validate document type from bytes before publishing the import
- AFETCH-107 · Make interrupted document fetch retries preserve one import identity
Acceptance criteria
- Log safe origin, import ID and failure code only.
- Strip query, fragment and user information from diagnostics.
- Keep provider errors from bypassing the safe projection.
Implementation constraints
- Use fabricated signed URLs in tests.
Verification to include
- Trace a timeout by import ID.
- Inject secret-like query values into redirect and timeout errors and assert absence.
Deliverables
- Fetch diagnostic sanitizer
Rollout and recovery
Deploy safe diagnostics before broad imports; restrict older error records.
Value of the work
For the engineer: Practice defensive URL handling and bounded untrusted-input processing.
For the team: Review whether integrations can import content without expanding infrastructure access.
Evidence boundaries
Outcome Evidence: Tests, patches, and runbooks are requested deliverables. They become Outcome Evidence only through a qualified Mission and immutable Evidence IDs.
Ownership Evidence: Independent adaptation must be observed under a declared verification policy and cite immutable Evidence IDs. Completing a planning ticket establishes no Ownership Evidence.