Access HTTP headers values from a request

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

app.get('/', (c) => {
  c.req.header('User-Agent')
})

You can access all the HTTP headers using the c.req.raw.headers property:

app.get('/', c => {
  console.log(c.req.raw.headers)
})

Change any HTTP header value for a response

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

c.header('Content-Type', 'text/html')

Lessons in this unit: