Regex for Query String

Question

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?

Community · Accepted Answer · 2017-05-23 11:57:26Z

4

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: '' }

edited May 23, 2017 at 11:57

CommunityBot

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answered Mar 25, 2013 at 19:51

Benjamin Gruenbaum

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1 Comment

AlbertEngelB Over a year ago

Much better than what I was doing before. I'm pretty sure I'd tried this and it had failed for some reason, probably me not removing the search from the parsed URL. Where I had two problems, I now have none. Thanks!

Explosion Pills · Accepted Answer · 2013-03-25 19:53:06Z

1

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 ?:.

answered Mar 25, 2013 at 19:53

Explosion Pills

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1 Comment

AlbertEngelB Over a year ago

It should be noted I have about zero applicable regex experience, other than stealing things from the internet. Thanks for the help though!

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