Regex to match url patterns

Question

I know this is a very simple question but since I am very bad in regex , have to ask below question. I want to write a regex expression in java which will match below two url patterns given :

{contextPath}/javax.faces.resource/**

{contextPath}/rfRes/**

The url will be read from http request object and will be compared using java pattern object like below :

Pattern p = //regex here ;
p.matcher(r.getRequestURL().toString()).matches();

Can anybody help me in writing a regex experion for above two urls ?

It indicates anything after / .So its a wildcard entry there — Atul
– Atul, Commented Nov 17, 2014 at 10:55
Do you have a HttpServletRequest reference to be able to get context path? — anubhava
– anubhava, Commented Nov 17, 2014 at 10:59
No , we don't have . But do we really need it ? We are not matching for contextPath. It can be anything .What we need to match is path in between. — Atul
– Atul, Commented Nov 17, 2014 at 11:04
Do you really regex for this? Just use request.getRequestURI() and get first part — anubhava
– anubhava, Commented Nov 17, 2014 at 11:06

anubhava · Accepted Answer · 2014-11-17 13:43:41Z

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You can use this:

boolean matches = r.getRequestURI().matches(".*?/(javax\.faces\.resource|rfRes)/.*");

edited Nov 17, 2014 at 13:43

answered Nov 17, 2014 at 11:12

anubhava

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Atul Over a year ago

Thanks for your repply. But I suppose , above expression will match exactly for /javax.faces.resource/[any character] . But what is needed is [any character]/javax.faces.resource/[any character]. Does /*(javax.faces.resource|rfRes).* will work ?

aelor · Accepted Answer · 2014-11-17 12:19:10Z

1

you can use this :

.*?(?:\/javax\.faces\.resource\/|\/rfRes\/).*$

demo here : http://regex101.com/r/rV5mR8/2

It checks whether the string start with either of the two options which you want.

edited Nov 17, 2014 at 12:19

answered Nov 17, 2014 at 11:01

aelor

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Atul Over a year ago

Thanks aelor for repply . We really don't need contextPath. It can be anything . We just need to check javax.faces.resource/** and /rfRes/**. In that case , do we need contextPath in regex expression ?

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