XSLT - problem with EXSLT document tag

[NigelRen]

I've been using the exslt document tag in an XSLT template for a while.  Something like

 

<?xml version="1.0" encoding="UTF-8"?>

<xsl:stylesheet version="1.0"

  xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

  xmlns:exsl="http://exslt.org/common"

  xmlns:date="http://exslt.org/dates-and-times"

  extension-element-prefixes="exsl date">

<xsl:output method="text" />

<xsl:template match="/Schema/Table">

<exsl:document href="a.b" method="text">

A

</exsl:document>

</xsl:template>

 

</xsl:stylesheet>

Suddenly it's stopped working with

 

[Fri Feb 10 20:49:25 2012] [error] [client 192.168.122.1] PHP Warning:  XSLTProcessor::transformToXml(): File write for a.b refused in /var/www/gen/genX/GenModelClass.php on line 72, referer: http://192.168.122.35/gen/genMenu.php

[Fri Feb 10 20:49:25 2012] [error] [client 192.168.122.1] PHP Warning:  XSLTProcessor::transformToXml(): runtime error: file /var/www/gen/genX/GenModelClass.xsl line 9 element document in /var/www/gen/genX/GenModelClass.php on line 72, referer: http://192.168.122.35/gen/genMenu.php

 

So I assumed that it was write permissions to the directory it was using, but using fopen will create the file.  Even if I specify the file as file:///tmp/a.b doesn't work. ( I'm using Ubuntu as the server ).

 

Is there a working example out there which I could try and see if there is something wrong with my setup - or does someone know what's happening?

 

[requinix]

I vaguely recall there being problems with PHP, libxml, and filesystem access. Some security settings preventing reading and writing.

 

Are you simply dumping /Schema/Table to a file?

[NigelRen]

I'm trying to generate sources from a database schema, but I removed all of the extra stuff in case there was something else causing problems.

 

I've managed to get the same thing working on a CentOS virtual machine I just set up - so it may be some permissions settings on the Ubuntu config.  I've tried to ensure all directories I've tried to write to are rwx for all users.  If there isn't anything obvious I may just end up scrapping or rebuilding the Ubuntu machine and try again.

 

 

[requinix]

What errors, if any, does libxml_get_errors return?

[NigelRen]

With the code...

 

$result = $xp->transformToXml($def);
if ( $result == false )	{
$err =  libxml_get_last_error();
echo "Error...". print_r(libxml_get_errors(),TRUE)  ."<br />";
}
else	{
echo $result;
}
echo "<b>Complete</b>";

 

All I get is...

 

Error...Array ( )

Complete

 

The one thing - is that I always seemed to get false even when it did work.  But I wasn't worried about that.

[NigelRen]

:D

Finally found the problem... they've changed the defaults in the way XSLT is allowed to create files etc.  listed as a 'bug' ( have a read of https://bugs.php.net/bug.php?id=54446 ).

 

I've changed the code to be

 

$xp = new XsltProcessor();

//if you want to write from within the XSLT
if (version_compare(PHP_VERSION,'5.4',"<")) {
$oldval = ini_set("xsl.security_prefs",0);
} else {
$oldval = $xp->setSecurityPreferences(0);
}

$xsl = new DOMDocument();
$xsl->load("./GenModelClass.xsl");

$xp->importStylesheet($xsl);

 

And it now works.

 

Thanks for you help