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url-encode.xsl
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<?xml version="1.0" encoding="utf-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
<!-- ISO-8859-1 based URL-encoding demo
Written by Mike J. Brown, [email protected].
Updated 2015-10-24 (to update the license).
License: CC0 <https://creativecommons.org/publicdomain/zero/1.0/deed.en>
Also see http://skew.org/xml/misc/URI-i18n/ for a discussion of
non-ASCII characters in URIs.
-->
<!-- Characters -->
<xsl:variable name="ascii"> !"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~</xsl:variable>
<xsl:variable name="latin1"> ¡¢£¤¥¦§¨©ª«¬­®¯°±²³´µ¶·¸¹º»¼½¾¿ÀÁÂÃÄÅÆÇÈÉÊËÌÍÎÏÐÑÒÓÔÕÖ×ØÙÚÛÜÝÞßàáâãäåæçèéêëìíîïðñòóôõö÷øùúûüýþÿ</xsl:variable>
<!-- Safe Characters -->
<xsl:variable name="safe">!'()*-.0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz~</xsl:variable>
<xsl:variable name="hex">0123456789ABCDEF</xsl:variable>
<xsl:template name="url-encode">
<xsl:param name="str"/>
<xsl:if test="$str">
<xsl:variable name="first-char" select="substring($str,1,1)"/>
<xsl:choose>
<xsl:when test="contains($safe,$first-char)">
<xsl:value-of select="$first-char"/>
</xsl:when>
<xsl:otherwise>
<xsl:variable name="codepoint">
<xsl:choose>
<xsl:when test="contains($ascii,$first-char)">
<xsl:value-of select="string-length(substring-before($ascii,$first-char)) + 32"/>
</xsl:when>
<xsl:when test="contains($latin1,$first-char)">
<xsl:value-of select="string-length(substring-before($latin1,$first-char)) + 160"/>
</xsl:when>
<xsl:otherwise>
<xsl:message terminate="no">Warning: string contains a character that is out of range! Substituting "?".</xsl:message>
<xsl:text>63</xsl:text>
</xsl:otherwise>
</xsl:choose>
</xsl:variable>
<xsl:variable name="hex-digit1" select="substring($hex,floor($codepoint div 16) + 1,1)"/>
<xsl:variable name="hex-digit2" select="substring($hex,$codepoint mod 16 + 1,1)"/>
<xsl:value-of select="concat('%',$hex-digit1,$hex-digit2)"/>
</xsl:otherwise>
</xsl:choose>
<xsl:if test="string-length($str) > 1">
<xsl:call-template name="url-encode">
<xsl:with-param name="str" select="substring($str,2)"/>
</xsl:call-template>
</xsl:if>
</xsl:if>
</xsl:template>
</xsl:stylesheet>