XSLT 2.0: regex extract and modify element value - regex

Question

I have this XML:
<xml>
<row>
<image><![CDATA[javascript: open_window_zoom('http://example.com/image.php?image=/images/test/example.png&pID=46391&download=noid_90.png&name=Test name', 975, 366);]]></image>
<quantity>0</quantity>
</row>
<row>
<image><![CDATA[javascript: open_window_zoom('http://example.com/image.php?image=/images/test/another.png&pID=06395&download=anotherfile.png&name=Test name', 975, 366);]]></image>
<quantity>0</quantity>
</row>
</xml>
It is possible to extract pID=NUMBERHERE&download=FILENAMEHERE.png (and add new url before it)from <image> element?
The output should be like this:
<xml>
<row>
<image>http://newurl.com/pID=46391&download=noid_90.png</image>
<quantity>0</quantity>
</row>
<row>
<image>http://newurl.com/pID=06395&download=anotherfile.png</image>
<quantity>0</quantity>
</row>
</xml>
I tried some things, but I can't get the desidered result. For start I can copy the current structure:
<xsl:stylesheet version="1.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>

Answer 1

This XSLT 2.0 stylesheet splits the value by & and then uses a predicate to filter only those that matches() the supplied regex where the parameter names are either pID or download. Using the #separator for xsl:value-of to join the values with &:
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="image">
<xsl:copy>
<xsl:text>http://newurl.com/</xsl:text>
<xsl:value-of select="tokenize(., '&')[matches(., '(pID|download).*')]"
separator="&"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>
Alternatively, this XSLT 2.0 stylesheet uses xsl:analyze-string to extract the text that matches the provided regex:
<xsl:stylesheet version="2.0"
xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:output omit-xml-declaration="yes" indent="yes"/>
<xsl:strip-space elements="*"/>
<xsl:template match="node()|#*">
<xsl:copy>
<xsl:apply-templates select="node()|#*"/>
</xsl:copy>
</xsl:template>
<xsl:template match="image">
<xsl:copy>
<xsl:text>http://newurl.com/</xsl:text>
<xsl:analyze-string select="." regex=".*(pID=.*&download=.*)&.*">
<xsl:matching-substring>
<xsl:value-of select="regex-group(1)"/>
</xsl:matching-substring>
<xsl:non-matching-substring></xsl:non-matching-substring>
</xsl:analyze-string>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>

Answer 2

Try this XSLT:
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
<xsl:template match="#* | node()">
<xsl:copy>
<xsl:apply-templates select="#* | node()"/>
</xsl:copy>
</xsl:template>
<xsl:template match="image">
<xsl:copy>
<xsl:value-of select="concat('http://newurl.com/pID=', substring-before(substring-after(text(), '&pID='), '&name='))"/>
</xsl:copy>
</xsl:template>
</xsl:stylesheet>