From 9655d471f7df25fc2c48e4c8a34bac864beb8347 Mon Sep 17 00:00:00 2001
From: cliffhall <cliff@futurescale.com>
Date: Mon, 14 Apr 2025 17:13:11 -0400
Subject: [PATCH] Add periodic stderr messages. In everything.ts - add a 10
 second interval for sending 'notifications/stderr' messages to the client

This was created in order to test the display and clearing of stderr messages in the client.
- see https://github.com/modelcontextprotocol/inspector/pull/286
---
 src/everything/everything.ts | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

diff --git a/src/everything/everything.ts b/src/everything/everything.ts
index cee1e731..d0a2ffb3 100644
--- a/src/everything/everything.ts
+++ b/src/everything/everything.ts
@@ -114,8 +114,9 @@ export const createServer = () => {
 
   let subscriptions: Set<string> = new Set();
   let subsUpdateInterval: NodeJS.Timeout | undefined;
-  // Set up update interval for subscribed resources
+  let stdErrUpdateInterval: NodeJS.Timeout | undefined;
 
+  // Set up update interval for subscribed resources
   subsUpdateInterval = setInterval(() => {
     for (const uri of subscriptions) {
       server.notification({
@@ -154,6 +155,19 @@ export const createServer = () => {
       server.notification(message);
   }, 15000);
 
+
+  // Set up update interval for stderr messages
+  stdErrUpdateInterval = setInterval(() => {
+    const shortTimestamp = new Date().toLocaleTimeString([], {
+      hour: '2-digit',
+      minute: '2-digit',
+      second: '2-digit'
+    });    server.notification({
+      method: "notifications/stderr",
+      params: { content: `${shortTimestamp}: A stderr message` },
+    });
+  }, 10000);
+
   // Helper method to request sampling from client
   const requestSampling = async (
     context: string,
@@ -676,6 +690,7 @@ export const createServer = () => {
   const cleanup = async () => {
     if (subsUpdateInterval) clearInterval(subsUpdateInterval);
     if (logsUpdateInterval) clearInterval(logsUpdateInterval);
+    if (stdErrUpdateInterval) clearInterval(stdErrUpdateInterval);
   };
 
   return { server, cleanup };