Send HTTP DELETE on streamable transport disconnect#470
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cliffhall merged 3 commits intomodelcontextprotocol:mainfrom Jun 2, 2025
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* In server/src/index.ts
- add delete handler for /mcp endpoint
- gets the server transport for the sessionId
- calls terminateSession on it
- removes the webapp and server transports for the sessionId from the maps
- returns status 200 to the client.
* In client/src/lib/hooks/useConnection.ts
- import Transport
- add useState for clientTransport, type Transport or null initialized to null
- in connect() function
- move creation of client transport down a ways, just before calling client.connect with it
- immendiately efter calling client.connect, call setClientTransport with the connected transport (has to happen after, so that what's saved has the abort controller, etc. otherwise it doesn't work to save it prior.
- in disconnect() function
- immediately call clientTransport.terminateSession if transportType is "streamable-http"
- setClientTransport to null
9 tasks
10 tasks
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LGTM after some testing :) |
evalstate
approved these changes
Jun 2, 2025
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In server/src/index.ts
In client/src/lib/hooks/useConnection.ts
Motivation and Context
For StreamableHttp transport, the spec says
How Has This Been Tested?
Manually connect to the everything server, and then disconnect.
Browser devtools console
Inspector proxy server
Everything server
NOTE
The sessionIds differ in the above reports for the Inspector proxy and the everything MCP server because there are two transports each direction. I.e.,
Breaking Changes
Nope.
Types of changes
Checklist
Additional context
DO NOT MERGE UNTIL #428 is merged, this PR is a branch off that one to separate the functionality.