[plt-scheme] Web programming .

From: Nevo (sakur.deagod at gmail.com)
Date: Sun Dec 27 21:52:11 EST 2009

2009/12/27 YC <yinso.chen at gmail.com>

> On Sat, Dec 26, 2009 at 9:43 PM, Nevo <sakur.deagod at gmail.com> wrote:
>>  hi,
>>   Sorry, forgive me not able to clarify more on this topic . Here's the
>> piece of code from the Genshi template file :
>>   <py:match path="body" once="true" buffer="false"><body>
>>     ${select('*|text()')}
>>     </body> </py:match>
>>   The above code is just instructing the template engine to *select* the
>> text content of node "body" from the XHTML streams.  That's the one I was
>> asking actually.  There's a difference between Genshi and PLT scheme web
>> template from my point of view , the former separates the template macros
>> and the real content streams ,while the latter  combines the template macros
>> (S-expressions) with the content. As suggested by Jay, I could use
>> SXML/SXPATH library to parse the XHTML content and select those nodes which
>> I'm interested in. Yeah, this is possible , but I havn't used that yet,  on
>> a quick read of its tutorial (
>> http://modis.ispras.ru/Lizorkin/sxml-tutorial.html) , I probably need to
>> obtain a SXML representation of a document which means the template file
>> should be expanded first (using @include-template) and then parse it using
>> SXML parser into a SXML document before I can use SXPath on it, am I right ?
>> Or is there a way to do it in template file itself ? Thanks.
> You need to convert the xml string generated by include-template into sxml
> in order to use sxpath, i.e.,
> (require (planet lizorkin/sxml) (planet lizorkin/ssax/ssax)
> web-server/templates)
> ((sxpath ...) (ssax:xml->sxml (open-input-string ((include-template
> "template.html") ...))))

 Yup, that's what I do currently .  Thanks .

 -- Nevo
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