4 Replies Latest reply on Jan 15, 2015 5:13 PM by karthik-vasishta.ramesh

Rewrite using undertow's configuration

daribo Jun 20, 2014 3:58 AM

I need some url rewrite logic, which was supported by jboss in earlier version. Now, unfortunately it's not working anymore.

I used to have a file called 'rewrite.properties', which had all my rules in it. Reading now through some post online, I figured out that now it's possible to do it, by using "undertow-handlers.conf.

I put my .conf file into /src/main/webapp/WEB-INF/undertow-handlers.conf. I can see that a simple rule does apply, but doing the following one, does not apply:

regex['^/Shoes/$'] -> rewrite['/showShoes.action?gender=men%{q}'];

The problem here, is the parameter 'gender'. The only resource which could give me a little bit help was this one: [undertow-dev] Rewrites and predicates

I would really appreciate any help or hint.

1. Re: Rewrite using undertow's configuration

daribo Jun 20, 2014 8:28 AM (in response to daribo)

OK, I figured it out.

In order to set a parameter to the rewrite rule, you need to specify it in the NEXT line (not in the same - won't work).

e.g.
regex['^/Shoes/$'] -> rewrite['/showShoes.action']
set[attribute='%{q,gender}', value='men'];

Now, I still need to find a way to set NC (case-insensitive)...
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2. Re: Rewrite using undertow's configuration

daribo Jun 23, 2014 4:57 AM (in response to daribo)

In order to set the Method parameter to GET or POST, you would need to do this:

method[GET] and regex['^/Shoes/$'] -> rewrite['/showShoes.action']
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3. Re: Rewrite using undertow's configuration

karthik-vasishta.ramesh Jan 13, 2015 7:16 PM (in response to daribo)

Hi Tom,

I'm looking for a solution to set NC in undertow-handlers.conf as well. Where you able to figure it out?
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4. Re: Rewrite using undertow's configuration

karthik-vasishta.ramesh Jan 15, 2015 5:13 PM (in response to karthik-vasishta.ramesh)

Ok, I am now almost certain that flags cannot be set in undertow-handlers.conf.

I got to know that the java class named: 'RegularExpressionPredicate.java' is responsible for parsing regexes, and this is not setting any flags (as seen here):
undertow/RegularExpressionPredicate.java at master · undertow-io/undertow · GitHub

The only alternative is to use character classes. This clumsy rule worked for me:
regex['^/[Ll][oO][gG][iI][nN]/$']-> rewrite['/index.html']

I have raised a JIRA ticket (feature request) with Undertow for this issue.
[UNDERTOW-370] Unable to set flags in undertow-handlers.conf (being used for URL Rewriting) - JBoss Issue Tracker

Please let me know if there is any solution to this. I will modify/cancel this ticket accordingly.
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