141 lines
4.6 KiB
JavaScript
141 lines
4.6 KiB
JavaScript
import { McpServer } from '../../server/mcp.js';
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import { StreamableHTTPServerTransport } from '../../server/streamableHttp.js';
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import * as z from 'zod/v4';
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import { createMcpExpressApp } from '../../server/express.js';
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const getServer = () => {
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// Create an MCP server with implementation details
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const server = new McpServer({
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name: 'stateless-streamable-http-server',
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version: '1.0.0'
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}, { capabilities: { logging: {} } });
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// Register a simple prompt
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server.registerPrompt('greeting-template', {
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description: 'A simple greeting prompt template',
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argsSchema: {
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name: z.string().describe('Name to include in greeting')
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}
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}, async ({ name }) => {
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return {
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messages: [
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{
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role: 'user',
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content: {
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type: 'text',
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text: `Please greet ${name} in a friendly manner.`
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}
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}
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]
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};
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});
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// Register a tool specifically for testing resumability
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server.registerTool('start-notification-stream', {
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description: 'Starts sending periodic notifications for testing resumability',
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inputSchema: {
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interval: z.number().describe('Interval in milliseconds between notifications').default(100),
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count: z.number().describe('Number of notifications to send (0 for 100)').default(10)
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}
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}, async ({ interval, count }, extra) => {
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const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms));
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let counter = 0;
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while (count === 0 || counter < count) {
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counter++;
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try {
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await server.sendLoggingMessage({
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level: 'info',
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data: `Periodic notification #${counter} at ${new Date().toISOString()}`
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}, extra.sessionId);
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}
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catch (error) {
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console.error('Error sending notification:', error);
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}
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// Wait for the specified interval
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await sleep(interval);
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}
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return {
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content: [
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{
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type: 'text',
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text: `Started sending periodic notifications every ${interval}ms`
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}
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]
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};
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});
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// Create a simple resource at a fixed URI
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server.registerResource('greeting-resource', 'https://example.com/greetings/default', { mimeType: 'text/plain' }, async () => {
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return {
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contents: [
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{
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uri: 'https://example.com/greetings/default',
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text: 'Hello, world!'
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}
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]
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};
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});
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return server;
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};
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const app = createMcpExpressApp();
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app.post('/mcp', async (req, res) => {
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const server = getServer();
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try {
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const transport = new StreamableHTTPServerTransport({
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sessionIdGenerator: undefined
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});
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await server.connect(transport);
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await transport.handleRequest(req, res, req.body);
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res.on('close', () => {
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console.log('Request closed');
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transport.close();
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server.close();
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});
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}
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catch (error) {
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console.error('Error handling MCP request:', error);
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if (!res.headersSent) {
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res.status(500).json({
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jsonrpc: '2.0',
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error: {
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code: -32603,
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message: 'Internal server error'
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},
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id: null
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});
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}
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}
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});
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app.get('/mcp', async (req, res) => {
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console.log('Received GET MCP request');
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res.writeHead(405).end(JSON.stringify({
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jsonrpc: '2.0',
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error: {
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code: -32000,
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message: 'Method not allowed.'
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},
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id: null
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}));
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});
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app.delete('/mcp', async (req, res) => {
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console.log('Received DELETE MCP request');
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res.writeHead(405).end(JSON.stringify({
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jsonrpc: '2.0',
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error: {
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code: -32000,
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message: 'Method not allowed.'
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},
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id: null
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}));
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});
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// Start the server
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const PORT = 3000;
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app.listen(PORT, error => {
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if (error) {
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console.error('Failed to start server:', error);
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process.exit(1);
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}
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console.log(`MCP Stateless Streamable HTTP Server listening on port ${PORT}`);
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});
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// Handle server shutdown
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process.on('SIGINT', async () => {
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console.log('Shutting down server...');
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process.exit(0);
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});
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//# sourceMappingURL=simpleStatelessStreamableHttp.js.map
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