AI Fails

When the LLM gets it wrong

Last Updated: 2026-07-31

Google Search, Gemini AI Summary - A 404 at best, unencrypted HTTP more likely

I search Google for node request get local path. Its AI summary provided the following code:

          const http = require('http');
http.createServer((req, res) => {
    // Pass a dummy base URL to parse relative request paths safely
    const requestUrl = new URL(req.url, `http://${req.headers.host}`);
    const localPath = requestUrl.pathname; 
    
    console.log(localPath); // Outputs: "/users" (instead of "/users?id=123")
    res.end(`Path requested: ${localPath}`);
}).listen(3000);

It hard coded the protocol. The correct code is:

const http = require('http');
http.createServer((req, res) => {
    // Pass a dummy base URL to parse relative request paths safely
    const requestUrl = new URL(req.url, `${req.protocol}://${req.headers.host}`);
    const localPath = requestUrl.pathname; 
    
    console.log(localPath); // Outputs: "/users" (instead of "/users?id=123")
    res.end(`Path requested: ${localPath}`);
}).listen(3000);

const http = require('http');

http.createServer((req, res) => {
    // Pass a dummy base URL to parse relative request paths safely
    const requestUrl = new URL(req.url, `${req.protocol}://${req.headers.host}`);
    const localPath = requestUrl.pathname; 
    
    console.log(localPath); // Outputs: "/users" (instead of "/users?id=123")
    res.end(`Path requested: ${localPath}`);
}).listen(3000);

By "correct" I mean in the context of this example which is a pretty absurb approach.

Playing devils advocate I "should" have searched node express request get local path:

          app.get('/users/profile', (req, res) => {
    console.log(req.path); 
    // Output: "/users/profile"
    
    res.send(`The requested path is: ${req.path}`);
});

app.get('/users/profile', (req, res) => {
    console.log(req.path); 
    // Output: "/users/profile"
    
    res.send(`The requested path is: ${req.path}`);
});

The point is where is the intelligence to suggest using Express in the first query response? No one should be using unencrypted HTTP as of at least a decade ago. Adding insult to injury the example uses CommonJS syntax.