Commit Inicial

2026-03-25 09:47:08 -03:00
commit 9636921d99
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+import { McpServer } from '../../server/mcp.js';
+import { SSEServerTransport } from '../../server/sse.js';
+import * as z from 'zod/v4';
+import { createMcpExpressApp } from '../../server/express.js';
+/**
+ * This example server demonstrates the deprecated HTTP+SSE transport
+ * (protocol version 2024-11-05). It mainly used for testing backward compatible clients.
+ *
+ * The server exposes two endpoints:
+ * - /mcp: For establishing the SSE stream (GET)
+ * - /messages: For receiving client messages (POST)
+ *
+ */
+// Create an MCP server instance
+const getServer = () => {
+    const server = new McpServer({
+        name: 'simple-sse-server',
+        version: '1.0.0'
+    }, { capabilities: { logging: {} } });
+    server.registerTool('start-notification-stream', {
+        description: 'Starts sending periodic notifications',
+        inputSchema: {
+            interval: z.number().describe('Interval in milliseconds between notifications').default(1000),
+            count: z.number().describe('Number of notifications to send').default(10)
+        }
+    }, async ({ interval, count }, extra) => {
+        const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms));
+        let counter = 0;
+        // Send the initial notification
+        await server.sendLoggingMessage({
+            level: 'info',
+            data: `Starting notification stream with ${count} messages every ${interval}ms`
+        }, extra.sessionId);
+        // Send periodic notifications
+        while (counter < count) {
+            counter++;
+            await sleep(interval);
+            try {
+                await server.sendLoggingMessage({
+                    level: 'info',
+                    data: `Notification #${counter} at ${new Date().toISOString()}`
+                }, extra.sessionId);
+            }
+            catch (error) {
+                console.error('Error sending notification:', error);
+            }
+        }
+        return {
+            content: [
+                {
+                    type: 'text',
+                    text: `Completed sending ${count} notifications every ${interval}ms`
+                }
+            ]
+        };
+    });
+    return server;
+};
+const app = createMcpExpressApp();
+// Store transports by session ID
+const transports = {};
+// SSE endpoint for establishing the stream
+app.get('/mcp', async (req, res) => {
+    console.log('Received GET request to /sse (establishing SSE stream)');
+    try {
+        // Create a new SSE transport for the client
+        // The endpoint for POST messages is '/messages'
+        const transport = new SSEServerTransport('/messages', res);
+        // Store the transport by session ID
+        const sessionId = transport.sessionId;
+        transports[sessionId] = transport;
+        // Set up onclose handler to clean up transport when closed
+        transport.onclose = () => {
+            console.log(`SSE transport closed for session ${sessionId}`);
+            delete transports[sessionId];
+        };
+        // Connect the transport to the MCP server
+        const server = getServer();
+        await server.connect(transport);
+        console.log(`Established SSE stream with session ID: ${sessionId}`);
+    }
+    catch (error) {
+        console.error('Error establishing SSE stream:', error);
+        if (!res.headersSent) {
+            res.status(500).send('Error establishing SSE stream');
+        }
+    }
+});
+// Messages endpoint for receiving client JSON-RPC requests
+app.post('/messages', async (req, res) => {
+    console.log('Received POST request to /messages');
+    // Extract session ID from URL query parameter
+    // In the SSE protocol, this is added by the client based on the endpoint event
+    const sessionId = req.query.sessionId;
+    if (!sessionId) {
+        console.error('No session ID provided in request URL');
+        res.status(400).send('Missing sessionId parameter');
+        return;
+    }
+    const transport = transports[sessionId];
+    if (!transport) {
+        console.error(`No active transport found for session ID: ${sessionId}`);
+        res.status(404).send('Session not found');
+        return;
+    }
+    try {
+        // Handle the POST message with the transport
+        await transport.handlePostMessage(req, res, req.body);
+    }
+    catch (error) {
+        console.error('Error handling request:', error);
+        if (!res.headersSent) {
+            res.status(500).send('Error handling request');
+        }
+    }
+});
+// Start the server
+const PORT = 3000;
+app.listen(PORT, error => {
+    if (error) {
+        console.error('Failed to start server:', error);
+        process.exit(1);
+    }
+    console.log(`Simple SSE Server (deprecated protocol version 2024-11-05) listening on port ${PORT}`);
+});
+// Handle server shutdown
+process.on('SIGINT', async () => {
+    console.log('Shutting down server...');
+    // Close all active transports to properly clean up resources
+    for (const sessionId in transports) {
+        try {
+            console.log(`Closing transport for session ${sessionId}`);
+            await transports[sessionId].close();
+            delete transports[sessionId];
+        }
+        catch (error) {
+            console.error(`Error closing transport for session ${sessionId}:`, error);
+        }
+    }
+    console.log('Server shutdown complete');
+    process.exit(0);
+});
+//# sourceMappingURL=simpleSseServer.js.map