Send a response using Express
New Course Coming Soon:
Get Really Good at Git
How to send a response back to the client using Express
In the Hello World example we used the Response.send()
method to send a simple string as a response, and to close the connection:
(req, res) => res.send('Hello World!')
If you pass in a string, it sets the Content-Type
header to text/html
.
if you pass in an object or an array, it sets the application/json
Content-Type
header, and parses that parameter into JSON.
send()
automatically sets the Content-Length
HTTP response header.
send()
also automatically closes the connection.
Use end() to send an empty response
An alternative way to send the response, without any body, it’s by using the Response.end()
method:
res.end()
Set the HTTP response status
Use the Response.status()
:
res.status(404).end()
or
res.status(404).send('File not found')
sendStatus()
is a shortcut:
res.sendStatus(200)
// === res.status(200).send('OK')
res.sendStatus(403)
// === res.status(403).send('Forbidden')
res.sendStatus(404)
// === res.status(404).send('Not Found')
res.sendStatus(500)
// === res.status(500).send('Internal Server Error')
Are you intimidated by Git? Can’t figure out merge vs
rebase? Are you afraid of screwing up something any time
you have to do something in Git? Do you rely on ChatGPT
or random people’s answer on StackOverflow to fix your
problems? Your coworkers are tired of explaining Git to
you all the time? Git is something we all need to use,
but few of us really master it. I created this course to
improve your Git (and GitHub) knowledge at a radical
level. A course that helps you feel less frustrated with
Git. Launching Summer 2024. Join the waiting list!
→ Get my Express.js Handbook
→ Read my
Express.js Tutorial
on The Valley of Code
Here is how can I help you:
- COURSES where I teach everything I know
- THE VALLEY OF CODE your web development manual
- BOOTCAMP 2024 cohort in progress, next edition in 2025
- BOOKS 16 coding ebooks you can download for free on JS Python C PHP and lots more
- SOLO LAB everything I know about running a lifestyle business as a solopreneur
- Interesting links collection
- Follow me on X