CODEWITHSUNDEEP
javascriptregexnode.js
AlbertEngelB
AlbertEngelB

Reputation: 16456

Regex for Query String

I had a regex function that I thought worked for removing the page variable in a querystring. Right now it works fine if the variable isn't first, however if the variable is the first variable, it doesn't catch ?search=.

Working Case:

http://blahblah.com/stuff/pages/things?search=somethingURIEncoded&page=2

turns into

console.log( req.url.replace(/&page(\=[^&]*)?(?=&|$)|^page(\=[^&]*)?(&|$)/, '') )
http://blahblah.com/stuff/pages/things?search=somethingURIEncoded

Non-Working Case:

http://blahblah.com/stuff/pages/things?page=2&search=somethingURIEncoded

turns into

console.log( req.url.replace(/&page(\=[^&]*)?(?=&|$)|^page(\=[^&]*)?(&|$)/, '') )
http://blahblah.com/stuff/pages/things?page=2&search=somethingURIEncoded

Anyone know how to fix this regex I'm using?

Upvotes: 1

Views: 162

Answers (2)

Benjamin Gruenbaum
Benjamin Gruenbaum

Reputation: 276436

If you want to parse a whole url, node.js has a built in url module.

It has a parse method that seems to do what you need: 

url.parse(urlStr, [parseQueryString], [slashesDenoteHost])

This question answers how to build it back into a URL if you'd like, and shows a usage example.

You also have a built-in querystring module.

You can use querystring.parse

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

Upvotes: 4

Explosion Pills
Explosion Pills

Reputation: 191779

Instead of ^page it should be \?page, but of course you would have to replace the ? back. You can capture it and make all of the other groupings non-capture with ?:.

Upvotes: 1

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