In src/examples/server/simpleStreamableHttp.ts

  - In  mcpPostHandler,
    - Get `mcp-session-id` header early so that it can be reported in every incoming request.
    - Helpful for troubleshooting Inspector's ability to retain the session id for the Proxy <-> Server leg

Author: cliffhall

src/examples/server/simpleStreamableHttp.ts

@@ -178,10 +178,10 @@ const getServer = () => {
   server.registerResource(
     'example-file-1',
     'file:///example/file1.txt',
-    { 
+    {
       title: 'Example File 1',
       description: 'First example file for ResourceLink demonstration',
-      mimeType: 'text/plain' 
+      mimeType: 'text/plain'
     },
     async (): Promise<ReadResourceResult> => {
       return {
@@ -198,10 +198,10 @@ const getServer = () => {
   server.registerResource(
     'example-file-2',
     'file:///example/file2.txt',
-    { 
+    {
       title: 'Example File 2',
       description: 'Second example file for ResourceLink demonstration',
-      mimeType: 'text/plain' 
+      mimeType: 'text/plain'
     },
     async (): Promise<ReadResourceResult> => {
       return {
@@ -338,15 +338,13 @@ const transports: { [sessionId: string]: StreamableHTTPServerTransport } = {};
 
 // MCP POST endpoint with optional auth
 const mcpPostHandler = async (req: Request, res: Response) => {
-  console.log('Received MCP request:', req.body);
+  const sessionId = req.headers['mcp-session-id'] as string | undefined;
+  console.log(sessionId? `Received MCP request for session: ${sessionId}`: 'Received MCP request:', req.body);
   if (useOAuth && req.auth) {
     console.log('Authenticated user:', req.auth);
   }
   try {
-    // Check for existing session ID
-    const sessionId = req.headers['mcp-session-id'] as string | undefined;
     let transport: StreamableHTTPServerTransport;
-
     if (sessionId && transports[sessionId]) {
       // Reuse existing transport
       transport = transports[sessionId];