tamabahan

src/server/routes/mcp_route.ts

@@ -8,22 +8,18 @@ import { isInitializeRequest } from '@modelcontextprotocol/sdk/types.js';
 const transports: Record<string, StreamableHTTPServerTransport> = {};
 
 const McpRoute = new Elysia()
-    // Middleware global untuk JSON parsing & header access
-    .onRequest(({ set }) => {
-        set.headers['Content-Type'] = 'application/json';
-    })
-    // Route utama untuk komunikasi client → server
     .post(
         '/mcp',
         async ({ body, request, set }) => {
             const sessionId = request.headers.get('mcp-session-id') ?? undefined;
             let transport: StreamableHTTPServerTransport;
 
-            // Jika ada sessionId, pakai transport lama
+            // Jika ada sessionId lama, gunakan ulang transport-nya
             if (sessionId && transports[sessionId]) {
                 transport = transports[sessionId];
-            } else if (!sessionId && isInitializeRequest(body)) {
-                // Jika belum ada session & ini request inisialisasi
+            }
+            // Jika request inisialisasi baru
+            else if (!sessionId && isInitializeRequest(body)) {
                 transport = new StreamableHTTPServerTransport({
                     sessionIdGenerator: () => randomUUID(),
                     onsessioninitialized: (sid) => {
@@ -31,22 +27,35 @@ const McpRoute = new Elysia()
                     },
                 });
 
-                // Cleanup transport jika ditutup
                 transport.onclose = () => {
-                    if (transport.sessionId) {
-                        delete transports[transport.sessionId];
-                    }
+                    if (transport.sessionId) delete transports[transport.sessionId];
                 };
 
-                // Inisialisasi MCP server
+                // Inisialisasi MCP Server
                 const server = new McpServer({
                     name: 'example-server',
                     version: '1.0.0',
                 });
 
-                // ... di sini bisa ditambahkan tools, prompts, dsb ...
+                // Tambahkan resource, tools, dsb di sini jika perlu
                 await server.connect(transport);
-            } else {
+
+                // Tunggu sampai session terbentuk
+                await new Promise<void>((resolve) => {
+                    const check = () => {
+                        if (transport.sessionId) return resolve();
+                        setTimeout(check, 5);
+                    };
+                    check();
+                });
+
+                // Kirim sessionId kembali ke client
+                set.headers['mcp-session-id'] = transport.sessionId!;
+                set.status = 200;
+                return { sessionId: transport.sessionId };
+            }
+            // Jika request invalid
+            else {
                 set.status = 400;
                 return {
                     jsonrpc: '2.0',
@@ -59,36 +68,37 @@ const McpRoute = new Elysia()
             }
 
             // Jalankan handler HTTP MCP
-            return await transport.handleRequest(
-                request as any,
-                // Simulasi `Response` agar Elysia bisa mengembalikan hasil
-                new Response(null, { status: 200 }) as any,
-                body
-            );
+            return await transport.handleRequest(request, new Response(), body);
         },
         {
-            body: t.Any(), // fleksibel untuk JSON-RPC
+            body: t.Any(),
         }
     )
-    // Handler reusable untuk GET & DELETE
-    .derive(({ request, set }) => {
+    // Handler GET untuk SSE (server → client)
+    .get('/mcp', async ({ request, set }) => {
         const sessionId = request.headers.get('mcp-session-id') ?? undefined;
         const transport = sessionId ? transports[sessionId] : undefined;
 
         if (!transport) {
             set.status = 400;
-            throw new Error('Invalid or missing session ID');
+            return 'Invalid or missing session ID';
         }
 
-        return { transport };
-    })
-    // GET untuk server → client via SSE
-    .get('/mcp', async ({ transport, request }) => {
-        return await transport.handleRequest(request as any, new Response() as any);
+        set.status = 200;
+        return await transport.handleRequest(request, new Response());
     })
     // DELETE untuk terminasi session
-    .delete('/mcp', async ({ transport, request }) => {
-        return await transport.handleRequest(request as any, new Response() as any);
+    .delete('/mcp', async ({ request, set }) => {
+        const sessionId = request.headers.get('mcp-session-id') ?? undefined;
+        const transport = sessionId ? transports[sessionId] : undefined;
+
+        if (!transport) {
+            set.status = 400;
+            return 'Invalid or missing session ID';
+        }
+
+        set.status = 200;
+        return await transport.handleRequest(request, new Response());
     })
 
 export default McpRoute