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fix(everything-server): normalize streamed tool responses (#462)

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Signed-off-by: lucarlig <luca.carlig@ibm.com>
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Luca 2026-09-06 18:53:40 +01:00 • committed by GitHub
commit 1573ad5fc8
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1 changed files with 80 additions and 39 deletions
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22
examples/servers/typescript/everything-server.ts
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@ -1246,14 +1246,13 @@ const STATELESS_CACHEABLE_METHODS: ReadonlySet<string> = new Set([
'resources/read'
]);
/** Send a stateless (draft) JSON-RPC response. Draft results MUST carry `resultType`
/** Normalize a stateless (draft) JSON-RPC response. Draft results MUST carry `resultType`
* and cacheable operations the SEP-2549 caching hints; stamp any the dispatch site did
* not set so every stateless result is draft-schema-valid. Errors pass through untouched. */
function sendStatelessJson(
res: import('express').Response,
function normalizeStatelessResponse(
method: string,
payload: { result?: Record<string, unknown>; [key: string]: unknown }
): import('express').Response {
): { result?: Record<string, unknown>; [key: string]: unknown } {
const result = payload.result;
if (result && typeof result === 'object' && !Array.isArray(result)) {
result.resultType ??= 'complete';
@ -1262,7 +1261,16 @@ function sendStatelessJson(
result.cacheScope ??= 'private';
}
}
return res.json(payload);
return payload;
}
/** Send a normalized stateless response as JSON. */
function sendStatelessJson(
res: import('express').Response,
method: string,
payload: { result?: Record<string, unknown>; [key: string]: unknown }
): import('express').Response {
return res.json(normalizeStatelessResponse(method, payload));
}
// Handle POST requests - stateful mode
@ -2257,7 +2265,9 @@ app.post('/mcp', async (req, res) => {
ResultSchema as any
);
for (const n of dispatch.drainNotifications()) write(n);
write({ jsonrpc: '2.0', id, result });
write(
normalizeStatelessResponse(method, { jsonrpc: '2.0', id, result })
);
} catch (e: any) {
for (const n of dispatch.drainNotifications()) write(n);
write({