stop Node.js http handler after sending response

Question

var http = require('http'); http.createServer(httpHandler).listen(80);

function httpHandler(req, res)
{
    let some_error = 'shit happened'
    if (some_error) http_send_error(req, res)
    console.log('we should not be here if http error sent')
    costly_processing() 
}

function http_send_error(req, res)
{
  res.writeheader(500, 'Content-type: text/plain')
  res.end("something wrong") 
  die() // I have to break this thread and stop handling this request 
}

How can I break http request handling after this error message was sent by http?

I can write

if (some_error) { http_send_error(req, res); return }

or

if (some_error) http_send_error(req, res)
else {
     //process without error
}

but it looks more verbose and unreadable. How can I break httpHandler after error?

Hi xoid, will it not exit the handler if you return, following the condition in httpHandler? if (some_error) return http_send_error(req, res) — lkroneman
– lkroneman, Commented Oct 29, 2019 at 14:32

lkroneman · Accepted Answer · 2019-10-29 15:20:22Z

1

you can return the function and it will execute http_send_error before stopping execution in the the handler.

if (some_error) return http_send_error(req, res)

answered Oct 29, 2019 at 15:20

lkroneman

1066 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Bassochette · Accepted Answer · 2019-10-29 15:25:10Z

0

as Ikroneman answered:

you can send the error and stop the handler to further process the request just by returning you error function

if (some_error) http_send_error(req, res)

and in the error handling function no need to "die()"

function http_send_error(req, res)
{
  res.writeheader(500, 'Content-type: text/plain')
  res.end("something wrong") 
  // since you return this function in the handler the request handling will stop here
}

answered Oct 29, 2019 at 15:25

Bassochette

1761 gold badge1 silver badge13 bronze badges

Collectives™ on Stack Overflow

stop Node.js http handler after sending response

2 Answers 2

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related