Data commit

Task/Echo-server/JavaScript/echo-server.js

@@ -0,0 +1,24 @@
+const net = require('net');
+
+function handleClient(conn) {
+    console.log('Connection from ' + conn.remoteAddress + ' on port ' + conn.remotePort);
+
+    conn.setEncoding('utf-8');
+
+    let buffer = '';
+
+    function handleData(data) {
+        for (let i = 0; i < data.length; i++) {
+            const char = data.charAt(i);
+            buffer += char;
+            if (char === '\n') {
+                conn.write(buffer);
+                buffer = '';
+            }
+        }
+    }
+
+    conn.on('data', handleData);
+}
+
+net.createServer(handleClient).listen(12321, 'localhost');