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[xsl] Preserving numeric character entity reference
Subject: [xsl] Preserving numeric character entity reference From: Kjetil Kjernsmo <kjetilk@xxxxxxxxx> Date: Wed, 14 Feb 2007 11:55:38 +0100 |
All, I'm trying to create a purely text-based CAPTCHA, using the Perl module Authen::PluggableCaptcha. It has worked well for its author. It uses various techniques to obfuscate the code the client sees, in the hope of putting spammers off sufficiently to make them go elsewhere. It is kind of nasty, but CAPTCHAs are generally a bad thing, this one is one of the less bad. It provides an XHTML fragment that I currently include in an XML document, which is transformed to XHTML. I do <xsl:copy-of select="/html/body/pagedata/cap:captcha/cap:challenge"/> which preserves most of the obfuscation. However, the XML parser (correctly) translates the numeric character entity references that are one of the obfuscation techniques. I can't use the us-ascii output encoding, as is usually suggested in cases like these, because, the numeric character entity references are actually in the us-ascii range anyway (and we want UTF-8 for the rest). Is this doable? Are there any other obfuscation techniques that can be done easily in XSLT that you can suggest? Cheers, Kjetil -- Kjetil Kjernsmo Information Systems Developer Opera Software ASA
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