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Request) {\n this._body = [];\n this._headersSent = false;\n\n const transform = new TransformStream();\n this.readableStream = transform.readable;\n this.#writer = transform.writable.getWriter();\n\n request.signal?.addEventListener(\"abort\", () => {\n this.#writer.close();\n this.readableStream.cancel();\n this.#events.get(\"close\")?.forEach((listener) => listener());\n });\n }\n\n on(event: string, listener: (...args: any[]) => void): this {\n let eventList = this.#events.get(event);\n if (!eventList) {\n eventList = [];\n this.#events.set(event, eventList);\n }\n eventList.push(listener);\n }\n\n writeHead(\n statusCode: number,\n statusMessage?: string | Record,\n headers?: Record,\n ): this {\n this.statusCode = statusCode;\n if (typeof statusMessage === \"string\") {\n this.statusMessage = statusMessage;\n if (headers) {\n this.headers = { ...this.headers, ...headers };\n }\n } else if (typeof statusMessage === \"object\") {\n this.headers = { ...this.headers, ...statusMessage };\n this.statusMessage = STATUS_CODES[statusCode] || \"Unknown\";\n } else {\n this.statusMessage = STATUS_CODES[statusCode] || \"Unknown\";\n }\n this._headersSent = true;\n return this;\n }\n\n setHeader(name: string, value: string | number | string[]): this {\n this.headers[name.toLowerCase()] = value; // Node.js headers are typically lowercase\n return this;\n }\n\n flushHeaders() {\n // This is wrong, but we must signal end here.\n // Otherwise, GET hangs.\n this.#writer.close();\n return this;\n }\n\n getHeader(name: string): string | number | string[] | undefined {\n return this.headers[name.toLowerCase()];\n }\n\n removeHeader(name: string): this {\n delete this.headers[name.toLowerCase()];\n return this;\n }\n\n hasHeader(name: string): boolean {\n return Object.prototype.hasOwnProperty.call(this.headers, name.toLowerCase());\n }\n\n getHeaders(): Record {\n return this.headers;\n }\n\n async write(chunk: any, encoding?: BufferEncoding, callback?: (error: Error | null | undefined) => void): boolean {\n let buffer: Uint8Array;\n if (typeof chunk === \"string\") {\n buffer = new TextEncoder().encode(chunk);\n } else if (chunk instanceof Buffer) { // Node.js Buffer\n buffer = new Uint8Array(chunk.buffer, chunk.byteOffset, chunk.byteLength);\n } else if (chunk instanceof Uint8Array) { // Web API Uint8Array\n buffer = chunk;\n } else {\n buffer = new TextEncoder().encode(String(chunk));\n }\n\n try {\n await this.#writer.write(buffer);\n if (callback) callback(null);\n return true;\n } catch (error: any) {\n if (callback) callback(error);\n return false;\n }\n }\n\n async end(chunk?: any, encoding?: BufferEncoding, callback?: (error: Error | null | undefined) => void): void {\n if (chunk) {\n await this.write(chunk, encoding);\n }\n try {\n await this.#writer.close(); // Close the writable stream\n if (callback) callback(null);\n } catch (error: any) {\n if (callback) callback(error);\n }\n if (callback) callback(null);\n }\n}\n\nclass ValTransport {\n constructor(public readonly options: StreamableHTTPServerTransportOptions) {}\n\n async handleRequest(request: Request, server: McpServer): Promise {\n const req = new MockIncomingMessage(request);\n const res = new MockServerResponse(request);\n const parsedRequestBody = req.method === \"GET\" || req.method == \"OPTIONS\" ? undefined : await request.json();\n const transport = new StreamableHTTPServerTransport(this.options);\n\n request.signal.addEventListener(\"abort\", () => {\n server.close();\n transport.close();\n });\n await server.connect(transport);\n\n await transport.handleRequest(req as IncomingMessage, res as unknown as ServerResponse, parsedRequestBody);\n const headers = res.getHeaders() as HeadersInit;\n return new Response(res.readableStream, { headers });\n }\n}","deleted","label",[98],"permalink","https://www.val.town/x/dglazkov/wdl-mcp/code/mcp.tsx","extension","actionData","errors"]