feat(mcp-server): add Streamable HTTP transport support - #230
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Marlin-Phone wants to merge 1 commit into
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feat(mcp-server): add Streamable HTTP transport support#230Marlin-Phone wants to merge 1 commit into
Marlin-Phone wants to merge 1 commit into
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Add a new --http mode using StreamableHTTPServerTransport so standard MCP clients (official SDK) can connect. The existing SSE mode fails the initialize handshake with 400 on POST /message because it uses a single global transport and calls server.connect() repeatedly. Multi-session support: each sessionId gets its own Server(Protocol) + Transport stored in a Map, dispatched by the mcp-session-id header on POST/GET/DELETE /mcp. transport.onclose cleans up the session. stdlib/SSE modes are unchanged. Closes wechatsync#229
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Summary
Add Streamable HTTP transport support to the MCP server via a new
--httpmode.Standard MCP clients (official SDK) could not complete the SSE handshake
(
POST /messagereturned 400) because the existing SSE implementation uses asingle global transport and calls
server.connect()repeatedly.Closes #229
Changes
packages/mcp-server/src/index.ts:StreamableHTTPServerTransport, add--httpmode detectionexpress.json()middlewarehandleRequest(req, res, req.body)(SDK convention)Server+Transportin a Map keyed bymcp-session-id, handled in POST/GET/DELETE/mcptransport.onclosecleans up the sessionTesting
pnpm --filter mcp-server buildpasses (ESM + DTS clean)initializehandshake verified with curl: returns protocolVersion + serverInfo + capabilities(list_platforms / check_auth / sync_article / extract_article / upload_image_file)