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From "Bertrand Delacretaz (JIRA)" <>
Subject [jira] Updated: (SOLR-49) PATCH: XSLTServletFilter
Date Wed, 20 Sep 2006 10:06:22 GMT
     [ ]

Bertrand Delacretaz updated SOLR-49:

    Attachment: solr-XSLTResponseWriter-files.tar.gz

Here's a new patch, I've reworked the code into an XSLTResponseWriter.

Must be configured like this in solrconfig.xml:

  <queryResponseWriter name="xslt" class="org.apache.solr.request.XSLTResponseWriter"/>

And the following request parameters activate it:

  wt = xslt
  tr = my-xslt-transform.xsl
  ct = text/html (which is the default value)

(don't you love terse param names ;-)

The XSLT transform is read using SolrConfig.config.openResource(...), so it must be available
in the solr/conf directory when running the Solr example config.

> PATCH: XSLTServletFilter
> ------------------------
>                 Key: SOLR-49
>                 URL:
>             Project: Solr
>          Issue Type: New Feature
>          Components: search
>         Environment: Tested on macosx 10.4.7, JDK 1.5.0_06
>            Reporter: Bertrand Delacretaz
>            Priority: Minor
>         Attachments: solr-XSLTResponseWriter-files.tar.gz, xslt-filter-files.tar.gz
> Patch that implements server-side XSLT transforms of query results.
> The filter is activated by using select/html instead of select/ to run queries, and optionally
adding a transform parameter to specify the XSLT transform to use, for example:
>   http://localhost:8983/solr/select/html?q=usage&transform=my.xsl
> In which case my.xsl should be found in solr/conf/xslt/ with the example configuration.
The default transform (solr/conf/xslt/query-to-html.xsl) outputs a simplistic HTML format.
> Performance is suboptimal, as the filter reparses the XML output generated by Solr. Modifying
the XMLWriter to output to a ContentHandler would be more efficient, but I didn't have time
to go that far.
> The TransformerProvider trivially caches the last Transformer used, could be improved
using an LRU cache of several transformers, I haven't checked if Solr's infrastructure contains
such an animal already.
> The patch is all new files, except for adding this in web.xml before the first <servlet>:
>   <filter>
>     <filter-name>xslt</filter-name>
>     <filter-class>org.apache.solr.xslt.XSLTServletFilter</filter-class>
>   </filter>
>   <!-- apply the XSLT filter when select/html is used to make queries -->  
>   <filter-mapping>
>     <filter-name>xslt</filter-name>
>     <url-pattern>/select/html/*</url-pattern>
>   </filter-mapping> 
> I've left the client-side XSLT stuff (stylesheet parameter) as is for the moment.

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