Hey, Stefan Behnel wrote:
I noticed that exslt:regexp was not supported by libexslt, so I wrote three extension functions that use Python's re module (which is not really JavaScript compatible as requested by the spec, but who cares...).
I think one might care if one had a stylesheet that uses exslt and then have it not work with lxml because the regex behavior is different?
Here's an example:
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xslt = etree.XSLT(etree.XML("""\ <xsl:stylesheet version="1.0" xmlns:regexp="http://exslt.org/regular-expressions" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"> <xsl:template match="*"> <test><xsl:copy-of select="*[regexp:test(string(.), '8.')]"/></test> </xsl:template> </xsl:stylesheet> """))
result = xslt(etree.XML('<a><b>123</b><b>098</b><b>987</b></a>')) print str(result) <test><b>987</b></test>
Since the test cases worked out perfectly, it's already in the trunk. So, when the regular exslt support gets merged, lxml will have more complete exslt support than libxslt itself. :)
Cool. :) One thing that I wonder about is potential security issues? Are there ways to break out of the Python regexs and call arbitrary python code? If not, then we don't need to worry about it. XSLT can be run from fairly unsafe sources so this may be a concern. Regards, Martijn