Return 404 for invalid session ID in handle_delete#261
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koic wants to merge 1 commit intomodelcontextprotocol:mainfrom
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Return 404 for invalid session ID in handle_delete#261koic wants to merge 1 commit intomodelcontextprotocol:mainfrom
handle_delete#261koic wants to merge 1 commit intomodelcontextprotocol:mainfrom
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## Motivation and Context The MCP specification requires that when a server receives a request containing a session ID that is no longer valid, it MUST respond with HTTP 404 Not Found. `handle_delete` was unconditionally calling `cleanup_session` and returning 200 even for nonexistent session IDs. Ref: https://modelcontextprotocol.io/specification/2025-11-25/basic/transports#session-management > The server MAY terminate the session at any time, after which it MUST respond > to requests containing that session ID with HTTP 404 Not Found. ## How Has This Been Tested? Added tests for DELETE with invalid session ID, and lifecycle tests for delete-then-POST and delete-then-DELETE scenarios. ## Breaking Change DELETE requests with an invalid session ID now return HTTP 404 "Session not found" instead of HTTP 200. However, this change is considered a bug fix because it brings the behavior into compliance with the MCP specification.
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Motivation and Context
The MCP specification requires that when a server receives a request containing a session ID that is no longer valid, it MUST respond with HTTP 404 Not Found.
handle_deletewas unconditionally callingcleanup_sessionand returning 200 even for nonexistent session IDs.Ref: https://modelcontextprotocol.io/specification/2025-11-25/basic/transports#session-management
How Has This Been Tested?
Added tests for DELETE with invalid session ID, and lifecycle tests for delete-then-POST and delete-then-DELETE scenarios.
Breaking Change
DELETE requests with an invalid session ID now return HTTP 404 "Session not found" instead of HTTP 200.
However, this change is considered a bug fix because it brings the behavior into compliance with the MCP specification.
Types of changes
Checklist