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Posted to users@cocoon.apache.org by thorsten schmid <ts...@novocron.de> on 2004/03/10 11:20:28 UTC
generating a 404 response in an xsp based pipeline
Hello,
Does anyone now how to generate a 404 error page in xsp?
We have an xsp-page searching a database for hits on clicked hyperlinks.
Because the site is also visited by search engines, I want the server to
respond with 404 status page as soon as the query returns no result.
Otherwise the webcrawler would spider several 'sorry no result found' - pages.
That would not make any sense at all.
What I have been trying so far is to use the action logicsheet to redirect to
an unknown uri to let cocoon serve the error page. But the use of the action
logicsheet is not allowed within a generator.
Does anyone have hints on how to solve the problem??
Best regards
Thorsten
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Re: generating a 404 response in an xsp based pipeline
Posted by thorsten schmid <ts...@novocron.de>.
Hi John,
Thank you for your hint. I wrote an exception included it in my xsp and
performed the necessary steps in the sitemap and IT WORKED.
For all people who have a similar problem I summarize te steps in detail:
My exception derived from org.apache.cocoon.ProcessingException (see
http://cocoon.apache.org/2.1/userdocs/concepts/errorhandling.html ):
package myPack;
import org.apache.cocoon.*;
import org.apache.avalon.framework.*;
public class MyEmptyResultException extends
org.apache.cocoon.ProcessingException
{
public MyEmptyResultException(String msg) { super(msg); }
}
My xsp:
:
<xsp:structure>
<xsp:include>MyPack.*</xsp:include>
</xsp:structure>
<xsp:logic>
:
:
/*auxilliary method for throwing the exception*/
protected void throwMyEmptyResultException() throws MyEmptyResultException {
throw new MyEmptyResultException("No results Found on your query");
}
:
:
</xsp:logic>
:
:
<esql:no-results>
<xsp:logic>throwMyEmptyResultException();</xsp:logic>
</esql:no-results>
:
The Sitemap:
:
:
<map:selector logger="sitemap.selector.exception" name="exception"
src="org.apache.cocoon.selection.ExceptionSelector">
:
:
<exception class="MyPack.MyEmptyResultException" name="no-sql-results"/>
:
:
</map:selector>
:
:
:
<map:handle-errors>
<map:select type="exception">
<map:when test="no-sql-results">
<map:generate src="xml/error-not-found.xml"/>
<map:transform src="xsl/error-not-found.xsl"/>
<map:serialize status-code="404"/>
</map:when>
</map:select>
</map:handle-errors>
:
:
:
_______________________________________________________
Am Mittwoch, 10. März 2004 11:41 schrieb John L. Webber:
> One way to solve the problem would be to throw a domain-specific
> exception in the generator and use a selector for this exception in the
> map:handle-errors for the pipeline. For example:
>
> <map:handle-errors>
> <map:select type="exception">
> <map:when test="our-custom-exception">
> <map:generate src="niceerror.xsp" type="serverpages"/>
> <map:transform src="html/site2html.xsl">
> <map:parameter name="pageTitle" value=": Resource not found"/>
> </map:transform>
> <map:serialize status-code="404"/>
> </map:when>
> </map:select>
> </map:handle-errors>
>
> John
>
> thorsten schmid wrote:
> >Hello,
> >
> >Does anyone now how to generate a 404 error page in xsp?
> >We have an xsp-page searching a database for hits on clicked hyperlinks.
> >Because the site is also visited by search engines, I want the server to
> >respond with 404 status page as soon as the query returns no result.
> >Otherwise the webcrawler would spider several 'sorry no result found' -
> > pages. That would not make any sense at all.
> >
> >What I have been trying so far is to use the action logicsheet to
> > redirect to an unknown uri to let cocoon serve the error page. But the
> > use of the action logicsheet is not allowed within a generator.
> >
> >Does anyone have hints on how to solve the problem??
> >Best regards
> >Thorsten
> >
> >
> >
> >---------------------------------------------------------------------
> >To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
> >For additional commands, e-mail: users-help@cocoon.apache.org
--
Thorsten Schmid
NovoCron Technologies
Am Steg 3, 89231 Neu-Ulm
Fon: +49-731-9723757
Fax: +49-731-9723818
Mobil: +49-170-3021585
mailto:tschmid@novocron.de
www.novocron.de
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Re: generating a 404 response in an xsp based pipeline
Posted by "John L. Webber" <Jo...@jentro.com>.
One way to solve the problem would be to throw a domain-specific
exception in the generator and use a selector for this exception in the
map:handle-errors for the pipeline. For example:
<map:handle-errors>
<map:select type="exception">
<map:when test="our-custom-exception">
<map:generate src="niceerror.xsp" type="serverpages"/>
<map:transform src="html/site2html.xsl">
<map:parameter name="pageTitle" value=": Resource not found"/>
</map:transform>
<map:serialize status-code="404"/>
</map:when>
</map:select>
</map:handle-errors>
John
thorsten schmid wrote:
>Hello,
>
>Does anyone now how to generate a 404 error page in xsp?
>We have an xsp-page searching a database for hits on clicked hyperlinks.
>Because the site is also visited by search engines, I want the server to
>respond with 404 status page as soon as the query returns no result.
>Otherwise the webcrawler would spider several 'sorry no result found' - pages.
>That would not make any sense at all.
>
>What I have been trying so far is to use the action logicsheet to redirect to
>an unknown uri to let cocoon serve the error page. But the use of the action
>logicsheet is not allowed within a generator.
>
>Does anyone have hints on how to solve the problem??
>Best regards
>Thorsten
>
>
>
>---------------------------------------------------------------------
>To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
>For additional commands, e-mail: users-help@cocoon.apache.org
>
>
>
>
--
---------------------------------------------------------
Jentro Technologies GmbH
John L. Webber, Software Development
---------------------------------------------------------
Rosenheimer Str. 145e 81671 München
Tel. +49 89 189 169 80 mailto:John.Webber@jentro.com
Fax +49 89 189 169 99 http://www.jentro.com
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AW: generating a 404 response in an xsp based pipeline
Posted by Marco Rolappe <m_...@web.de>.
hi thorsten,
you could redirect to an 'no-results-page' pipeline which serializes with a
status code of 404;
...
<map:match pattern="no-results">
...
<map:serialize type="html" status-code="404"/>
</map:match>
...
HTH
> -----Ursprungliche Nachricht-----
> Von: users-return-64348-m_rolappe=web.de@cocoon.apache.org
> [mailto:users-return-64348-m_rolappe=web.de@cocoon.apache.org]Im Auftrag
> von thorsten schmid
> Gesendet: Mittwoch, 10. Marz 2004 11:20
> An: users@cocoon.apache.org
> Betreff: generating a 404 response in an xsp based pipeline
>
>
> Hello,
>
> Does anyone now how to generate a 404 error page in xsp?
> We have an xsp-page searching a database for hits on clicked hyperlinks.
> Because the site is also visited by search engines, I want the server to
> respond with 404 status page as soon as the query returns no result.
> Otherwise the webcrawler would spider several 'sorry no result
> found' - pages.
> That would not make any sense at all.
>
> What I have been trying so far is to use the action logicsheet
> to redirect to
> an unknown uri to let cocoon serve the error page. But the use of
> the action
> logicsheet is not allowed within a generator.
>
> Does anyone have hints on how to solve the problem??
> Best regards
> Thorsten
>
>
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: users-unsubscribe@cocoon.apache.org
> For additional commands, e-mail: users-help@cocoon.apache.org
>
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