[Solved] Identify the error in this Express.js code that attempts to send a 301 redirect: app.get('/old', (req, res) => { res.status(301); res.send('Redirecting'); res.set('Location', '/new'); }); | Rest API

Rest API - HTTP Status Codes

Identify the error in this Express.js code that attempts to send a 301 redirect:

app.get('/old', (req, res) => {
  res.status(301);
  res.send('Redirecting');
  res.set('Location', '/new');
});

Ares.send() automatically sets Location header

BStatus code 301 is invalid for redirects

CLocation header should be set before sending response

Dres.status() must be called after res.send()

Step-by-Step Solution

Solution:

Step 1: Check order of response methods
Headers like Location must be set before sending the response body.
Step 2: Identify the mistake in code order
Here, res.send() is called before res.set('Location'), so Location header is not sent.
Final Answer:
Location header should be set before sending response -> Option C
Quick Check:
Set headers before sending response body [OK]

Quick Trick: Always set headers before sending response body [OK]

Common Mistakes:

MISTAKES

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