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feat(node): export toWebRequest(), the IncomingMessage→Request conversion inside toNodeHandler (#2390)

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Felix Weinberger 2026-06-30 11:47:44 +01:00 • committed by GitHub
commit 6cc7b1cb66
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1 changed files with 245 additions and 41 deletions
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14
examples/legacy-routing/server.ts
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@ -14,7 +14,7 @@ import { randomUUID } from 'node:crypto';
import { parseExampleArgs } from '@mcp-examples/shared';
import { createMcpExpressApp } from '@modelcontextprotocol/express';
import { NodeStreamableHTTPServerTransport, toNodeHandler } from '@modelcontextprotocol/node';
import { NodeStreamableHTTPServerTransport, toNodeHandler, toWebRequest } from '@modelcontextprotocol/node';
import type { McpRequestContext } from '@modelcontextprotocol/server';
import { createMcpHandler, isInitializeRequest, isLegacyRequest, McpServer } from '@modelcontextprotocol/server';
import cors from 'cors';
@ -72,14 +72,10 @@ app.use(
);
app.post('/mcp', async (req: Request, res: Response) => {
// The predicate inspects the same headers + body the entry does. Express
// has parsed the JSON body; pass it as `parsedBody` so the predicate need
// not re-read the stream.
const probe = new globalThis.Request(`http://localhost${req.url}`, {
method: req.method,
headers: req.headers as Record<string, string>
});
await ((await isLegacyRequest(probe, req.body)) ? handleLegacy(req, res) : modernNode(req, res, req.body));
// `toWebRequest` builds the web-standard `Request` the predicate takes.
// Express has already parsed (and consumed) the JSON body — pass it along.
const probe = await toWebRequest(req, req.body);
await ((await isLegacyRequest(probe)) ? handleLegacy(req, res) : modernNode(req, res, req.body));
});
// GET (standalone SSE stream / reconnect with Last-Event-ID) and DELETE
// (explicit session termination per the MCP spec) are sessionful-2025-only —