Versions:
-UrlRewriteFilter 2.6 and 3.1.0
-Grails 1.0.3
-Webserver: tested both Jetty 6.1.4 and Tomcat 6.0.14

Settings:
-I configured UrlReWriteFilter as first filter in web.xml.
-urlrewrite.xml has the rule: <rule><from>/mytest</from><to>/products/
index</to></rule>, and a similar outbound rule.

Results:
Browsing to http://localhost:8080/webapp/products/index will directly
show the Grails page bypassing urlrewrite because no inbound rules are
configured for that URL. When browsing to http://localhost:8080/webapp/mytest,
the rule is found by UrlRewrite, but somehow a 404 error pops up. The
404 error shows: "The requested resource (/webapp/products/index) is
not available". Which is strange because that url does work when
directly browsing to it.

I also testing it further with ROOT (empty) context, so the context
should not be the problem. (Also I didn't have any problem when using
simple servlets instead of Grails.)

The outbound rule does work without problems.

But the case in my first post should work, right? Grails should have
no knowledge that URLs are being rewritten by UrlRewriteFilter.

On 16 jul, 14:55, "Lucas F. A. Teixeira" <lucas...@gmail.com> wrote:

====== BOOT STRAP ====================
[1390] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@1087359 controller = [null],
action = [null], params = set[[empty]]] ->
org.codehaus.groovy.grails.web.mapping.ResponseCodeUrlMapping@1ccf342
[1390] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@7691c0 controller = [null],
action = [null], params = set['controller']] -> /(*)/(*)?/(*)?
[1390] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@5b02a6 controller = [null],
action = [null], params = set['action', 'controller']] -> /(*)/(*)?/
(*)?
[1392] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@10aefdb controller = [null],
action = [null], params = set['id', 'action', 'controller']] -> /(*)/
(*)?/(*)?
[2855] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@154145 controller = [null],
action = [null], params = set[[empty]]] ->
org.codehaus.groovy.grails.web.mapping.ResponseCodeUrlMapping@17035c6
[2855] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@1da997a controller = [null],
action = [null], params = set['controller']] -> /(*)/(*)?/(*)?
[2855] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@921a90 controller = [null],
action = [null], params = set['action', 'controller']] -> /(*)/(*)?/
(*)?
[2856] mapping.DefaultUrlMappingsHolder Reverse mapping:
[DefaultUrlMappingsHolder.UrlMappingKey@de648 controller = [null],
action = [null], params = set['id', 'action', 'controller']] -> /(*)/
(*)?/(*)?
2008-07-16 17:00:18.624:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.utils.Log DEBUG: logLevel set to
DEBUG
2008-07-16 17:00:18.624:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter DEBUG: confPath set
to /WEB-INF/urlrewrite.xml
2008-07-16 17:00:18.638:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.Conf DEBUG: XML builder factory is:
org.apache.xerces.jaxp.DocumentBuilderFactoryImpl
2008-07-16 17:00:18.641:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.Conf DEBUG: XML Parser:
org.apache.xerces.jaxp.DocumentBuilderImpl
2008-07-16 17:00:18.641:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.Conf DEBUG: about to parse conf
2008-07-16 17:00:18.642:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.ConfHandler DEBUG: Resolving to DTD /
org/tuckey/web/filters/urlrewrite/dtds/urlrewrite3.1.dtd
2008-07-16 17:00:18.658:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.Conf DEBUG: now initialising conf
2008-07-16 17:00:18.664:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.RuleBase DEBUG: loaded rule Rule 0 (/
mytest, /products/index 1)
2008-07-16 17:00:18.664:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.NormalRule DEBUG: loaded rule Rule 0
(/mytest, /products/index 1)
2008-07-16 17:00:18.664:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter DEBUG: inited with
1 rules
2008-07-16 17:00:18.664:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter DEBUG: conf is ok
2008-07-16 17:00:18.666:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter INFO: loaded (conf
ok)
2008-07-16 17:00:18.735:/webapp:INFO:  Initializing Spring
FrameworkServlet 'grails'
2008-07-16 17:00:18.904::INFO:  Started
SelectChannelConnec...@0.0.0.0:8080
Server running. Browse to http://localhost:8080/webapp

=========== Direct Grails URL request (/webapp/products/index)
=====================
2008-07-16 17:00:31.578:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.utils.ServerNameMatcher DEBUG:
looking for hostname match on current server name localhost
2008-07-16 17:00:31.580:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter DEBUG: checking for
status path on /webapp/products/index
2008-07-16 17:00:31.580:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriter DEBUG: processing
request for /webapp/products/index
2008-07-16 17:00:31.580:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriter DEBUG: context removed
from url
2008-07-16 17:00:31.584:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.RuleBase DEBUG: Rule 0 run called
with /products/index
[16217] mapping.DefaultUrlMappingsHolder Attempting to match URI [/
products/index] with pattern [500]
[16218] mapping.DefaultUrlMappingsHolder Attempting to match URI [/
products/index] with pattern [/(*)/(*)?/(*)?]
[16237] mapping.DefaultUrlMappingsHolder Matched URI [/products/index]
with pattern [/(*)/(*)?/(*)?], adding to posibilities

=========== Rewritten URL request (/webapp/mytest) ==================
2008-07-16 17:00:41.417:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.utils.ServerNameMatcher DEBUG:
looking for hostname match on current server name localhost
2008-07-16 17:00:41.417:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriteFilter DEBUG: checking for
status path on /webapp/mytest
2008-07-16 17:00:41.417:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriter DEBUG: processing
request for /webapp/mytest
2008-07-16 17:00:41.417:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.UrlRewriter DEBUG: context removed
from url
2008-07-16 17:00:41.418:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.RuleBase DEBUG: Rule 0 run called
with /mytest
2008-07-16 17:00:41.418:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.RuleBase DEBUG: matched "from"
2008-07-16 17:00:41.422:/webapp:INFO:
org.tuckey.web.filters.urlrewrite.RuleExecutionOutput DEBUG: needs to
be forwarded to /products/index

As you can see, a direct Grails URL request works as expected:
Urlrewrite will filter it first and won't find a rule for it, and then
Grails urlmapping will find a rule and shows the page.
In the second request -the rewritten URL request- Urlrewrite will find
a rule and forwards it to /webapp/products/index, BUT Grails
urlmapping doesn't seem to be called now???
And a 404 page will show: "NOT_FOUND RequestURI=/webapp/products/
index".