Regex to get a specific query string variable in a URL

Question

I have a URL like

server/area/controller/action/4/?param=2"

in which the server can be

http://localhost/abc
https://test.abc.com
https://abc.om

I want to get the first character after "action/" which is 4 in the above URL, with a regex. Is it possible with regex in js, or is there any way?

i just want to get 4 from this string, let skip discussion about parameter — gandil
– gandil, Commented Jul 13, 2012 at 12:32

Ωmega · Accepted Answer · 2012-07-13 12:39:56Z

3

Use regex \d+(?=\/\?)

var url = "server/area/controller/action/4/?param=2"; 
var param = url.match(/\d+(?=\/\?)/);

Test code here.

edited Jul 13, 2012 at 12:39

answered Jul 13, 2012 at 12:31

Ωmega

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Ωmega Over a year ago

If the first parameter may contain also non-digit characters, then use regex [^\/]+(?=\/\?)

Code Jockey · Accepted Answer · 2012-07-13 13:23:22Z

1

Using this regex in JavaScript:

action/(.)

Allows you to access the first matching group, which will contain the first character after action/ -- see the examples at JSFiddle

answered Jul 13, 2012 at 13:23

Code Jockey

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HBP · Accepted Answer · 2012-07-13 13:47:45Z

1

This way splits the URL on the / characters and extracts the last but one element

var url = "server/area/controller/action/4/?param=2".split ('/').slice (-2,-1)[0];

answered Jul 13, 2012 at 13:47

HBP

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