From f0fbfc7fcbc1489177f5c81cad7f49ba88b8244e Mon Sep 17 00:00:00 2001
From: qikaigao <33371207+qikaigao@users.noreply.github.com>
Date: Mon, 14 Apr 2025 00:46:13 -0700
Subject: [PATCH] StreamableHTTPServerTransport should only check init status
 when there is an sessionId

When using stateless mode, the backend will create a new transport for each request. For new transport, the initialized filed is always false. So we should only check the initialized filed if there is session existing
---
 src/server/streamableHttp.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/server/streamableHttp.ts b/src/server/streamableHttp.ts
index ec8d2aa7..fc13e762 100644
--- a/src/server/streamableHttp.ts
+++ b/src/server/streamableHttp.ts
@@ -371,7 +371,7 @@ export class StreamableHTTPServerTransport implements Transport {
    * Returns true if the session is valid, false otherwise
    */
   private validateSession(req: IncomingMessage, res: ServerResponse): boolean {
-    if (!this._initialized) {
+    if (this.sessionId && !this._initialized) {
       // If the server has not been initialized yet, reject all requests
       res.writeHead(400).end(JSON.stringify({
         jsonrpc: "2.0",