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[XSL-LIST Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] custom outputhandlers in xt (e.g. for wap phones)
 Oops, I'm answering my own question of yesterday,
>Subject: XT (XSLServlet) ignores media-type for xml?
but I think other people might be interested in the fact
that xt will happily call on custom output handlers
(written presumably as variations on the basic
[HTML,XML,NXML,Text]OutputHandler
classes. So I'll mention the answer I found. I'd said
>I think I'm probably missing something obvious.
...
and that my xsl servlet could generate the right output with
output method="xml"
or the right content-type with
output method="html"
but couldn't do both with either.
I now find that I can write a custom XMLOutputHandler,
a slightly-modified version of that which jclark
includes, and call it by defining a namespace ("javaout")
which xt recognizes internally as the fixed string
"http://www.jclark.com/xt/java"
and then use that namespace to label my outputhandler.
This outputhandler uses the media-type to set the content-type
of the response, and so in particular I can have an xsl
servlet produce text/vnd.wap.wml output, or presumably
any other. It goes like this, and appears very nicely on
the simulated WAP phone on my screen:
----------------------------------------
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:vdoc="http://www.jclark.com/xt/java/MyNa.jspUtil.QueryDoc"
xmlns="http://www.w3.org/TR/xhtml1/strict"
xmlns:javaout="http://www.jclark.com/xt/java"
exclude-result-prefixes="javaout vdoc #default"
>
<xsl:output method="javaout:MyNa.jspUtil.XMLOutputHandler"
indent="yes" encoding="UTF-8"
media-type="text/vnd.wap.wml" omit-xml-declaration="no"
doctype-public="-//PHONE.COM//DTD WML 1.1//EN"
doctype-system="http://www.phone.com/dtd/wml11.dtd"
/>
<xsl:param name="theSessionID" select="NoHttpSessionIDProvided"/>
<xsl:template match="/">
<wml>
<head>
<meta http-equiv="Cache-Control" content="no-cache" forua="true"/>
</head>
<card id="output" title="TimeTemp">
....
</card>
</wml>
</xsl:template>
</xsl:stylesheet>
----------------------------------------
So maybe nobody else is doing this kind of thing, or maybe everybody
else who uses xt already knows how to do custom stuff like this, but
it took me a long time to figure it out (I had to recompile xt with
some logging code inserted) and I hope I'll save somebody some time,
sometime or other.
Tom Myers tom.myers@xxxxxxxxxxxxxxxx
XSL-List info and archive: http://www.mulberrytech.com/xsl/xsl-list
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