Wishlist: Support writing XPath/XSLT functions in Ruby #336
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adding custom XSLT functions. closed by eb56525 |
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I wish Nokogiri allow us to write XPath/XSLT functions in Ruby.
Background: I have XML documents and I like to apply reasonably complicated context-dependent procedure (escaping, transcoding, etc.) to every text node in them, while transforming document tree structure.
Python lxml library has such feature:
Simplified usage example follows:
#!/usr/bin/ruby # -*- encoding: utf-8 -*- xml = <<EOXML <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1 plus MathML 2.0//EN" "http://www.w3.org/TR/MathML2/dtd/xhtml-math11-f.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <meta http-equiv="Content-type" content="application/xhtml+xml"/> <title>Foo</title> </head> <body> <h1>Foo</h1> <p>Lorem ipsum.</p> </body> </html> EOXML xsl = <<EOXSL <?xml version="1.0"?> <xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform" xmlns:f="http://exslt.org/functions" extension-element-prefixes="f"> <xsl:template match="text()"> <xsl:copy-of select="f:capitalize(.)"/> </xsl:template> <xsl:template match="@*|node()"> <xsl:copy> <xsl:apply-templates select="@*|node()"/> <xsl:apply-imports/> </xsl:copy> </xsl:template> </xsl:stylesheet> EOXSL require 'nokogiri' require 'stringio' def capitalize(s) s.upcase end exts = {"f:capitalize" => method(:capitalize)} xslt = Nokogiri::XSLT.parse(StringIO.new(xsl), :extensions => exts) result = xslt.transform(Nokogiri::XML.parse(xml)) result.display # expected output: # <?xml version="1.0"?> # <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> # <head> # <meta http-equiv="Content-type" content="application/xhtml+xml"/> # <title>FOO</title> # </head> # <body> # <h1>FOO</h1> # <p>LOREM IPSUM.</p> # </body> # </html>The text was updated successfully, but these errors were encountered: