Remove a query string parameter from url with regular expression

Question

I'm trying to remove a query string parameter from a url using regular expressions (in .NET if it matters) without luck.

The solutions I've found on Stackoverflow use the HttpValueCollection, or similar helpers, or doesn't use the whole url including the ? before the query string. I would like this to work in plain regex if possible.

Parameter to remove: remove=me.

Sample urls:

http://{domain}/?remove=me
http://{domain}/?remove=me&foo=bar
http://{domain}/?baz=qux&remove=me&foo=bar
http://{domain}/?baz=qux&remove=me
http://{domain}/?baz=qux&tmpremove=me

After the parameter is removed the remaining url should be intact. No "&&", "?&", or "http://{domain}/&..." and it shouldn't touch the "tmpremove=me" :-)

Cheers

Why do you want to use regular expressions - a tool you don't understand well enough to use it for solving your problem - when there is already a working solution not involving regular expressions? — Daniel Brückner
– Daniel Brückner, Commented Apr 8, 2014 at 17:30
What do you mean when you say the URL should be intact but no "&&, "?&", etc? Do you want to keep those symbols or not? — CAustin
– CAustin, Commented Apr 8, 2014 at 17:45
@CAustin, && and ?& are leftovers from sloppy query part manipulation. — bzlm
– bzlm, Commented Apr 8, 2014 at 17:48
possible duplicate of Regular expression to remove one parameter from query string — bzlm
– bzlm, Commented Apr 8, 2014 at 17:49
So would a trailing ? or & also be considered "sloppy" and therefore "wrong"? — ClickRick
– ClickRick, Commented Apr 8, 2014 at 17:52

CAustin · Accepted Answer · 2014-04-08 18:57:41Z

1

Match: (?:[?&]remove=me$)|(?:([?&])remove=me&(.+))

Replace with: $1$2

edited Apr 8, 2014 at 18:57

answered Apr 8, 2014 at 18:10

CAustin

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1 Comment

user571188 Over a year ago

Thanks. Looks a little bit weird in regexpr/regexpal, but does its job in .net. Would upvote this if i had the credentials.

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