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Posted to dev@tomcat.apache.org by Loïc Lefèvre <ll...@fivia.com> on 2001/08/07 11:14:47 UTC
RE: partial URLPatternMatching in Tomcat 4.0 (Servlet 2.3 spec)? ++
-----Message d'origine-----
De : Craig R. McClanahan [mailto:craigmcc@apache.org]
Envoyé : lundi 6 août 2001 18:45
À : Tomcat Dev
Objet : RE: partial URLPatternMatching in Tomcat 4.0 (Servlet 2.3 spec)?
> On Mon, 6 Aug 2001, Loïc Lefèvre wrote:
>
> > Would/Must the RewriteValve do that?
> >
>
> Well, you can certainly use Valves if you don't mind being tied to Tomcat
> 4. But, to implement a controller type mechanism that uses request
> dispatchers, a Filter is a much better answer (the only way a Valve can do
> the dispatch is to change the Request URI to select the appropriate
> servlet).
Indeed, I think a filter is better.
>
> Doing the pattern matching yourself (say, with the jakarta-regexp
> package) inside a Filter still avoids all the "thousands of if
> statements" you are worried about. (But talking about how to implement
> this is straying into TOMCAT-USER topics -- this list is for Tomcat
> development related questions).
2nd Indeed ;), but if I've send this mail here (the DEV mailing list),
it's because of the catalina/docs/dev/todo.html file and because of
the before the end paragraph:
Valve Provided Functionality
Priority Action Item
Volunteers
...
LOW Design and implement a valve that provides functional
rt -
similar to the Apache server Rewrite family of directives that
support transformations on the request URI.
[org.apache.catalina.valves.RewriteValve]
...
Does this answer (your mail) means this action item has been recently
deleted? :(
Second question:
Will Tomcat allow sharing cookies (I mean path="/")?
I think it could be interesting and thus the server.xml don't have a DTD,
this
could be done like this:
<Host name="www.something.com">
<Context path="/www"
docBase="webapps/www"
crossContext="false"
debug="11"
reloadable="true"
cookie-path="/"> <---- :))))))))))))))))))) (would be great!)
</Context>
</Host>
How about it?
Third question:
Does the servlet specification (2.2 or 2.3) tell all that Tomcat have to do
or
such idea can become true? :) :) :) :)
note: Does this mail stands in the "PROPOSALS FOR TOMCAT" category or is it
a best way to do it? :)
>
> > Loïc Lefèvre
> >
>
> Craig
Loïc Lefèvre
> note : thanks Pier ;)
> note 2: it worked before, I mean the e-mail address
>
> -----Message d'origine-----
> De : Craig R. McClanahan [mailto:craigmcc@apache.org]
> Envoyé : samedi 4 août 2001 04:08
> À : 'tomcat-user@jakarta.apache.org'
> Cc : 'tomcat-dev@jakarta.apache.org'
> Objet : Re: partial URLPatternMatching in Tomcat 4.0 (Servlet 2.3 spec)?
>
>
>
>
>
> On Thu, 2 Aug 2001, Ru, Simon wrote:
>
> > I wonder if Servlet 2.3's Filter allow partial URLPatternMatching.
> Something
> > like:
> >
> > <filter-mapping>
> > <filter-name>timerFilter</filter-name>
> > <url-pattern>/Controller?action=timer*</url-pattern>
> > </filter-mapping>
> > If it can, then we can use the Filtering mechanism as a controller to do
> > request dispatching. We can avoid having thousands if statements in the
> > Controller and we can easily modify the dispatching route without
> recompile.
> >
> > If it can't, is it something worth enhancing? What needs to add to have
> that
> > capability? Thanks in advance.
> >
>
> While what you propose might be quite nice, Tomcat needs to conform to the
> servlet spec's rules for what a legal <url-pattern> can contain -- it's
> the same for both filter mappings and servlet mappings -- and this pattern
> is not legal.
>
> One strategy would be to match for "/Controller/*" and let the filter look
> at the query parameters to decide whether or not to do anything
> special. Otherwise, it can just pass the request on unmolested.
>
> > Simon Ru
> > Software Engineer
> > (510) 897-5331
> > http://www.worldchain.com
> >
>
> Craig McClanahan
>
>
RE: partial URLPatternMatching in Tomcat 4.0 (Servlet 2.3 spec)? +++
Posted by Loïc Lefèvre <ll...@fivia.com>.
As no answer has been given, I repost my message... :)
note: I would like to help you... and me...
Loïc Lefèvre
> On Mon, 6 Aug 2001, Loïc Lefèvre wrote:
>
> > Would/Must the RewriteValve do that?
> >
>
> Well, you can certainly use Valves if you don't mind being tied to Tomcat
> 4. But, to implement a controller type mechanism that uses request
> dispatchers, a Filter is a much better answer (the only way a Valve can do
> the dispatch is to change the Request URI to select the appropriate
> servlet).
Indeed, I think a filter is better.
>
> Doing the pattern matching yourself (say, with the jakarta-regexp
> package) inside a Filter still avoids all the "thousands of if
> statements" you are worried about. (But talking about how to implement
> this is straying into TOMCAT-USER topics -- this list is for Tomcat
> development related questions).
2nd Indeed ;), but if I've send this mail here (the DEV mailing list),
it's because of the catalina/docs/dev/todo.html file and because of
the before the end paragraph:
Valve Provided Functionality
Priority Action Item
Volunteers
...
LOW Design and implement a valve that provides functional
rt -
similar to the Apache server Rewrite family of directives that
support transformations on the request URI.
[org.apache.catalina.valves.RewriteValve]
...
Does this answer (your mail) means this action item has been recently
deleted? :(
Second question:
Will Tomcat allow sharing cookies (I mean path="/")?
I think it could be interesting and thus the server.xml don't have a DTD,
this
could be done like this:
<Host name="www.something.com">
<Context path="/www"
docBase="webapps/www"
crossContext="false"
debug="11"
reloadable="true"
cookie-path="/"> <---- :))))))))))))))))))) (would be great!)
</Context>
</Host>
How about it?
Third question:
Does the servlet specification (2.2 or 2.3) tell all that Tomcat have to do
or
such idea can become true? :) :) :) :)
note: Does this mail stands in the "PROPOSALS FOR TOMCAT" category or is it
a best way to do it? :)
>
> > Loïc Lefèvre
> >
>
> Craig
Loïc Lefèvre
> note : thanks Pier ;)
> note 2: it worked before, I mean the e-mail address
>
> -----Message d'origine-----
> De : Craig R. McClanahan [mailto:craigmcc@apache.org]
> Envoyé : samedi 4 août 2001 04:08
> À : 'tomcat-user@jakarta.apache.org'
> Cc : 'tomcat-dev@jakarta.apache.org'
> Objet : Re: partial URLPatternMatching in Tomcat 4.0 (Servlet 2.3 spec)?
>
>
>
>
>
> On Thu, 2 Aug 2001, Ru, Simon wrote:
>
> > I wonder if Servlet 2.3's Filter allow partial URLPatternMatching.
> Something
> > like:
> >
> > <filter-mapping>
> > <filter-name>timerFilter</filter-name>
> > <url-pattern>/Controller?action=timer*</url-pattern>
> > </filter-mapping>
> > If it can, then we can use the Filtering mechanism as a controller to do
> > request dispatching. We can avoid having thousands if statements in the
> > Controller and we can easily modify the dispatching route without
> recompile.
> >
> > If it can't, is it something worth enhancing? What needs to add to have
> that
> > capability? Thanks in advance.
> >
>
> While what you propose might be quite nice, Tomcat needs to conform to the
> servlet spec's rules for what a legal <url-pattern> can contain -- it's
> the same for both filter mappings and servlet mappings -- and this pattern
> is not legal.
>
> One strategy would be to match for "/Controller/*" and let the filter look
> at the query parameters to decide whether or not to do anything
> special. Otherwise, it can just pass the request on unmolested.
>
> > Simon Ru
> > Software Engineer
> > (510) 897-5331
> > http://www.worldchain.com
> >
>
> Craig McClanahan
>
>