Express: Work with HTTP headers

Access HTTP headers values from a request

You can access all the HTTP headers using the Request.headers property:

app.get('/', (req, res) => {

Use the Request.header() method to access one individual request header’s value:

app.get('/', (req, res) => {

Change any HTTP header value for a response

You can change any HTTP header value using Response.set():

res.set('Content-Type', 'text/html')

There is a shortcut for the Content-Type header, however:

// => 'text/html'

// => 'text/html'

// => 'application/json'

// => 'application/json'

// => image/png:

Lessons in this unit:

0: Introduction
1: Introduction to Express
2: Request parameters
3: Send a response to the client
4: Send a JSON response
5: Manage cookies
6: ▶︎ Work with HTTP headers
7: Handling redirects
8: Routing
9: Template engines
10: Middleware
11: Serving Static Assets with Express
12: Send files to the client
13: Sessions
14: Validating and sanitizing input
15: Handling form data
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