Improve Node.js test stub

Signed-off-by: Juan Cruz Viotti <jv@jviotti.com>

test/http/stub.js

@@ -1,20 +1,17 @@
 const http = require('http');
+const PORT = 9999;
 
-const server = http.createServer((req, res) => {
-  // Set the response header to indicate JSON content
-  res.setHeader('Content-Type', 'application/json');
-
-  // Define a simple JSON response
-  const jsonResponse = {
-    message: 'Hello, JSON World!',
-    timestamp: new Date().toISOString(),
-  };
+http.createServer((request, response) => {
+  for (const [key, value] of Object.entries(request.headers)) {
+    response.setHeader(`X-${key}`, value);
+  }
 
-  // Send the JSON response
-  res.end(JSON.stringify(jsonResponse));
-});
+  if (request.headers['x-code']) {
+    response.statusCode = parseInt(request.headers['x-code'], 10);
+  }
 
-const PORT = 9999;
-server.listen(PORT, () => {
+  response.setHeader('Content-Type', 'text/plain');
+  response.end(`RECEIVED ${request.method} ${request.url}`);
+}).listen(PORT, () => {
   console.log(`Server is listening on port ${PORT}`);
 });