GET querystring in node.js

Question

I need to edit a node.js app GET a querystring, without (i) using Express or any other modules and (ii) creating a server in addition to the one which already exists.

I want to pass ?id=helloworld into the variable id.

How would I do this?

If you google "nodejs querystring" the first result is a link to the docs about the native querystring module... — Chad
– Chad, Commented Sep 12, 2013 at 16:35

hexacyanide · Accepted Answer · 2013-09-12 16:41:14Z

8

You can use the native querystring module to parse query strings.

var http = require('http');
var qs = require('querystring');

http.createServer(function (req, res) {
  var str = req.url.split('?')[1];
  qs.parse(str);
});

Parsing query strings will return results in an object:

qs.parse('foo=bar&baz=qux&baz=quux&corge')
// returns
{ foo: 'bar', baz: ['qux', 'quux'], corge: '' }

You can also find the source of the module here.

edited Sep 12, 2013 at 16:41

answered Sep 12, 2013 at 16:34

hexacyanide

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3 Comments

Chad Over a year ago

You will need to get pass only what is after the ?, more like qs.parse(req.url.split('?')[1])

user1164541 Over a year ago

Thanks! How would I then write an if function for when foo=bar in the querystring?

hexacyanide Over a year ago

var result = qs.parse('foo=bar&baz=qux&baz=quux&corge'); if (result.foo == 'bar') {} is how you'd do that.

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