Intermediate LevelREST APIs & Web Services
How does the Sunset HTTP Header (RFC 8594) communicate API endpoint deprecation dates?
❓ Interview Prompt: Explain API deprecation strategy, `Sunset` HTTP header (RFC 8594), `Deprecation` header, breaking change grace periods, and developer notifications.
Decommissioning legacy API endpoints gracefully requires giving clients clear, machine-readable notice before shutting down routes:
RFC 8594 'Sunset' Header:
Returns an HTTP response header specifying the exact future date when the endpoint will be permanently retired:
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'Sunset: Sun, 31 Dec 2026 23:59:59 GMT'
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'Deprecation: @1753699200' (Unix timestamp when endpoint became deprecated).
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API gateways can monitor log telemetry for clients still hitting 'Sunset' routes and automatically dispatch email warnings to developers!
Code Implementation Example
http
HTTP/1.1 200 OK
Deprecation: true
Sunset: Sun, 31 Dec 2026 23:59:59 GMT
Link: <https://api.example.com/docs/v2-migration>; rel="successor-version"
Content-Type: application/json💡Sunset and Deprecation HTTP response headers notifying clients of upcoming retirement.
🎯 Interview Key Takeaway
Communicate API endpoint deprecation dates using Sunset (RFC 8594) and Deprecation HTTP headers.
#Sunset Header#Deprecation#API Governance#Intermediate
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