expressjsHow do I use Express.js to get headers?

Express.js is a web application framework for Node.js. It can be used to get headers from incoming requests. Here is an example of how to do this:

const express = require('express')
const app = express()

app.get('/', (req, res) => {
  const headers = req.headers
  console.log(headers)
  res.send('Headers received')
})

app.listen(3000)

This example code will create an Express.js server that will log the headers from incoming requests and respond with the message Headers received.

The code consists of the following parts:

1. const express = require('express') - This line imports the Express.js module.
2. const app = express() - This line creates an Express.js application.
3. app.get('/', (req, res) => { - This line creates a route handler for the GET request to the root URL.
4. const headers = req.headers - This line retrieves the headers from the incoming request.
5. console.log(headers) - This line logs the headers to the console.
6. res.send('Headers received') - This line sends the response Headers received to the client.
7. app.listen(3000) - This line starts the Express.js server on port 3000.

For more information about Express.js, see the documentation.

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