# Demo — Inspecting HTTP Traffic

This demo runs a minimal Express server that echoes back everything it receives — method, headers, body. Use it to see what a real HTTP request looks like from the server's perspective.

## Setup

```bash
npm install
node server.js
```

Server runs on `http://localhost:3000`.

## What to see

1. Open `http://localhost:3000` in the browser — see the GET request in DevTools Network tab, then see the same info echoed in the terminal
2. Submit the form at `http://localhost:3000/form` — see the POST body appearing both in DevTools and in the terminal
3. Use curl to send a raw request and compare it to what the browser sends:

```bash
# Basic GET
curl -v http://localhost:3000

# POST with a body
curl -v -X POST http://localhost:3000/login \
  -H "Content-Type: application/x-www-form-urlencoded" \
  -d "username=user&password=1234"

# See response headers only
curl -I http://localhost:3000
```

4. See a `Set-Cookie` header by visiting `http://localhost:3000/set-cookie`, then show the cookie being sent back on the next request