Regex for a url pattern

Question

I'm developing a dynamic controller which accept this urls:

mock_test5 - mock_test1
reviewer_test5
reviewer_test4
reviewer_test3.1
reviewer_test3.2
reviewer_test1

Note: reviewer_test2 is excluded

I'm having a hard time figuring it out. This is what I don't so far:

^(mock|reviewer)_test[1-5]$

I also don't know how do I interpret 3.1 and 3.2

If you need to check it against exactly those 10 strings, why don't you just put them all in a List and use contains? — Dawood ibn Kareem
– Dawood ibn Kareem, Commented Nov 28, 2013 at 22:42
@DavidWallace I'm using Spring MVC and as I said it is a URL pattern — newbie
– newbie, Commented Nov 28, 2013 at 22:47
should all elements that are not in this list fail? (Is it ok to have false-positives?) — Angelo Fuchs
– Angelo Fuchs, Commented Nov 28, 2013 at 22:51

Ωmega · Accepted Answer · 2013-11-28 23:26:56Z

5

^(?:mock_test[1-5]|reviewer_test(?:[145]|3[.][12]))$

Regular expression visualization

^(?:mock_test(?:1|2|3|4|5)|reviewer_test(?:(?:1|4|5)|3\.(?:1|2)))$

Regular expression visualization

edited Nov 28, 2013 at 23:26

answered Nov 28, 2013 at 23:19

Ωmega

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3 Comments

newbie Over a year ago

I know it is off topic but I just want to know what did you use to generate that chart?

Dawood ibn Kareem Over a year ago

Why all the ?: symbols? I don't see what difference they make here.

Ωmega Over a year ago

@DavidWallace - Non capturing grouping save resources

Christian Kuetbach · Accepted Answer · 2013-11-29 15:46:35Z

0

As you can see at this link: http://regexr.com?37dtn

^(mock_test[1-5])|reviewer_test([145]|3\.1|3\.2)$

^                  = start a line with
(mock_test[1-5])   = the string 'mock_test' followed by a number from 1 to 5 
                     I think the '(' and ')' are not necessary
|                  = OR
reviewer_test      = the string 'reviewer_test'
([145]|3\.1|3\.2)  = the numbers 1,4,5 OR the number 3.1 OR the number 3.2
$                  = end of line

Update:

If it is a limited number I wouldn't use a regex, because it seems to be some kind of write once read never again code.

edited Nov 29, 2013 at 15:46

answered Nov 28, 2013 at 22:48

Christian Kuetbach

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3 Comments

Angelo Fuchs Over a year ago

doesn't match mock_test2

newbie Over a year ago

If I don't use regex to this. I will have to write 10 duplicate controllers with the same logic inside.

newbie Over a year ago

One last thing before I accept your answer. Can you explain a bit the regex so I can create similar in the future?

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