can1357
41ce810cff
- Native (non-mcp://) resource URIs now pass through byte-for-byte via rawHref; slash elision applies only to the legacy mcp:// wrapper, so catalog://root/ style URIs match exact-equality server lookups. - resources/templates/list failure no longer discards a successful resources/list (Promise.allSettled; templates retried later). - Opaque RFC 3986 URIs (urn:doc, custom:item) are recognized by both the router and read-cli discovery gates, with drive-path and read-selector false positives guarded. - Review follow-up for PR #6790.
91 lines
3.1 KiB
TypeScript
Executable File
91 lines
3.1 KiB
TypeScript
Executable File
#!/usr/bin/env bun
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/**
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* Test fixture: a stdio MCP server that advertises the `resources` capability
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* and serves `resources/list` plus `resources/read`, but does NOT implement the optional
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* `resources/templates/list` method — it answers that request with a JSON-RPC
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* -32601 ("Method not found") error, exactly like jcodemunch/jdocmunch.
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*
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* Used by `mcp-resource-templates-missing.test.ts` to prove that a missing
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* templates method no longer discards the server's concrete resources.
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*
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* Speaks newline-delimited JSON-RPC 2.0 (the wire format of `StdioTransport`),
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* same shape as `many-tools-mcp.ts`. Exported constants are imported by the
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* test; the server only starts when run as the entry module (`import.meta.main`).
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*/
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import * as readline from "node:readline";
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/** Concrete resource URIs the fixture advertises via `resources/list`. */
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export const RESOURCE_URIS = ["test://alpha", "test://beta", "urn:fixture:gamma"];
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/**
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* JSON-RPC error code returned for `resources/templates/list`. Defaults to
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* -32601 ("Method not found"); tests may override via the
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* `FIXTURE_TEMPLATES_ERROR_CODE` env var (e.g. -32603) to simulate a server
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* whose templates listing fails outright.
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*/
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const TEMPLATES_ERROR_CODE = Number(process.env.FIXTURE_TEMPLATES_ERROR_CODE ?? "-32601");
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const TEMPLATES_ERROR_MESSAGE = TEMPLATES_ERROR_CODE === -32601 ? "Method not found" : "Internal error";
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type JsonRpcRequest = {
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jsonrpc: "2.0";
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id?: string | number;
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method: string;
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params?: Record<string, unknown>;
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};
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function buildResult(method: string, params?: Record<string, unknown>): Record<string, unknown> {
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switch (method) {
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case "initialize":
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return {
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protocolVersion: "2025-03-26",
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serverInfo: { name: "resources-no-templates-fixture", version: "1.0.0" },
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capabilities: { resources: {} },
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};
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case "resources/list":
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return {
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resources: RESOURCE_URIS.map((uri, i) => ({ uri, name: `Resource ${i}` })),
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};
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case "resources/read": {
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const uri = String(params?.uri ?? "");
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return { contents: [{ uri, text: `fixture content for ${uri}` }] };
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}
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default:
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return {};
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}
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}
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function startServer(): void {
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const rl = readline.createInterface({ input: process.stdin });
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rl.on("line", line => {
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const trimmed = line.trim();
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if (trimmed.length === 0) return;
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let msg: JsonRpcRequest;
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try {
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msg = JSON.parse(trimmed) as JsonRpcRequest;
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} catch {
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return;
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}
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// Notifications (no `id`) get no response.
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if (msg.id === undefined || msg.id === null) return;
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if (msg.method === "resources/templates/list") {
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// Optional method this server doesn't implement (or fails, per env).
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const error = {
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jsonrpc: "2.0" as const,
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id: msg.id,
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error: { code: TEMPLATES_ERROR_CODE, message: TEMPLATES_ERROR_MESSAGE },
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};
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process.stdout.write(`${JSON.stringify(error)}\n`);
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return;
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}
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const response = { jsonrpc: "2.0" as const, id: msg.id, result: buildResult(msg.method, msg.params) };
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process.stdout.write(`${JSON.stringify(response)}\n`);
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});
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rl.on("close", () => process.exit(0));
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}
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if (import.meta.main) {
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startServer();
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}
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