Introduce random delays between res writes

index.mjs

@@ -1,38 +1,45 @@
 import { createServer } from 'node:http';
-import { clearInterval, setInterval } from 'node:timers';
+import { setTimeout } from 'node:timers';
 
 const msg = ':) you are an idiot hahahahaha :)';
+const minDelay = 1000;
+const maxDelay = 5000;
+const delayDiff = maxDelay - minDelay;
+const randomDelay = () => Math.floor(Math.random() * delayDiff + minDelay);
 
 const server = createServer((req, res) => {
   const connOpenDate = new Date();
-  const dateLogText = connOpenDate.toLocaleString('pl');
+  const dateText = connOpenDate.toLocaleString('pl');
   const attacker = req.headers['x-forwarded-for'];
   const host = req.headers['x-forwarded-host'];
-
-  console.log(
-    `[${dateLogText}] ${attacker} targeted ${host} on ${req.method} ${req.url}`
-  );
-
+  const endpoint = `${req.method} ${req.url}`;
   let charIdx = 0;
 
-  const intervalId = setInterval(() => {
+  console.log(`[${dateText}] ${attacker} targeted ${host} on ${endpoint}`);
+
+  const hang = () => {
+    if (res.closed) return;
+
     if (charIdx === msg.length) {
       charIdx = 0;
       res.write('\n');
     } else {
       res.write(msg[charIdx++]);
     }
-  }, 3000);
+
+    setTimeout(hang, randomDelay());
+  };
+
+  hang();
 
   res.once('close', () => {
     const connCloseDate = new Date();
     const timeDiff = connCloseDate.getTime() - connOpenDate.getTime();
-    const dateLogText = connCloseDate.toLocaleString('pl');
+    const dateText = connCloseDate.toLocaleString('pl');
     const diffText = new Date(timeDiff).toISOString().substring(11, 19);
 
-    clearInterval(intervalId);
     console.log(
-      `[${dateLogText}] ${attacker} aborted connection after ${diffText}`
+      `[${dateText}] ${attacker} aborted connection after ${diffText}`
     );
   });
 });