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https://gitlab.xiph.org/xiph/icecast-server.git
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56bbc0d12c
Fixes: #2198 If there is a single "-" or it is only accompanied by whitespace, then it wouldn't get escaped as it was detected as as a number. This would produce invalid JSON. This makes the numbers part ignore such and thus ensures it gets escaped as text. There might be other corner cases related to number parsing, this should be investigated.
231 lines
9.2 KiB
HTML
231 lines
9.2 KiB
HTML
<?xml version="1.0" encoding="UTF-8"?>
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<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
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<!--
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Copyright (c) 2006,2008 Doeke Zanstra
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer. Redistributions in binary
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form must reproduce the above copyright notice, this list of conditions and the
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following disclaimer in the documentation and/or other materials provided with
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the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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THE POSSIBILITY OF SUCH DAMAGE.
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-->
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<xsl:output indent="no" omit-xml-declaration="yes" method="text" encoding="UTF-8" media-type="application/json"/>
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<xsl:strip-space elements="*"/>
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<!--default to no output-->
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<xsl:variable name="output">false</xsl:variable>
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<!--constant-->
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<xsl:variable name="d">0123456789</xsl:variable>
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<!-- ignore document text -->
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<xsl:template match="text()[preceding-sibling::node() or following-sibling::node()]"/>
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<!-- string -->
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<xsl:template match="text()">
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<xsl:call-template name="escape-string">
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<xsl:with-param name="s" select="."/>
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</xsl:call-template>
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</xsl:template>
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<!-- Main template for escaping strings; used by above template and for object-properties
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Responsibilities: placed quotes around string, and chain up to next filter, escape-bs-string -->
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<xsl:template name="escape-string">
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<xsl:param name="s"/>
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<xsl:text>"</xsl:text>
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<xsl:call-template name="escape-bs-string">
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<xsl:with-param name="s" select="$s"/>
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</xsl:call-template>
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<xsl:text>"</xsl:text>
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</xsl:template>
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<!-- Escape the backslash (\) before everything else. -->
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<xsl:template name="escape-bs-string">
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<xsl:param name="s"/>
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<xsl:choose>
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<xsl:when test="contains($s,'\')">
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<xsl:call-template name="escape-quot-string">
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<xsl:with-param name="s" select="concat(substring-before($s,'\'),'\\')"/>
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</xsl:call-template>
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<xsl:call-template name="escape-bs-string">
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<xsl:with-param name="s" select="substring-after($s,'\')"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:otherwise>
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<xsl:call-template name="escape-quot-string">
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<xsl:with-param name="s" select="$s"/>
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</xsl:call-template>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- Escape the double quote ("). -->
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<xsl:template name="escape-quot-string">
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<xsl:param name="s"/>
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<xsl:choose>
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<xsl:when test="contains($s,'"')">
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<xsl:call-template name="encode-string">
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<xsl:with-param name="s" select="concat(substring-before($s,'"'),'\"')"/>
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</xsl:call-template>
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<xsl:call-template name="escape-quot-string">
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<xsl:with-param name="s" select="substring-after($s,'"')"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:otherwise>
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<xsl:call-template name="encode-string">
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<xsl:with-param name="s" select="$s"/>
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</xsl:call-template>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- Replace tab, line feed and/or carriage return by its matching escape code. Can't escape backslash
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or double quote here, because they don't replace characters (� becomes \t), but they prefix
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characters (\ becomes \\). Besides, backslash should be seperate anyway, because it should be
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processed first. This function can't do that. -->
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<xsl:template name="encode-string">
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<xsl:param name="s"/>
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<xsl:choose>
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<!-- tab -->
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<xsl:when test="contains($s,'	')">
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<xsl:call-template name="encode-string">
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<xsl:with-param name="s" select="concat(substring-before($s,'	'),'\t',substring-after($s,'	'))"/>
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</xsl:call-template>
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</xsl:when>
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<!-- line feed -->
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<xsl:when test="contains($s,'
')">
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<xsl:call-template name="encode-string">
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<xsl:with-param name="s" select="concat(substring-before($s,'
'),'\n',substring-after($s,'
'))"/>
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</xsl:call-template>
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</xsl:when>
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<!-- carriage return -->
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<xsl:when test="contains($s,'
')">
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<xsl:call-template name="encode-string">
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<xsl:with-param name="s" select="concat(substring-before($s,'
'),'\r',substring-after($s,'
'))"/>
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</xsl:call-template>
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</xsl:when>
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<xsl:otherwise><xsl:value-of select="$s"/></xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- number (no support for javascript mantissa) -->
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<xsl:template match="text()[not(string(number())='NaN' or
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(starts-with(.,'0' ) and . != '0' and not(starts-with(.,'0.' ))) or
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(starts-with(.,'-0' ) and . != '-0' and not(starts-with(.,'-0.' )))) and
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not(substring(normalize-space(.), string-length(normalize-space(.))) = '-')]">
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<xsl:choose>
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<xsl:when test="starts-with(.,'.')">
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<xsl:value-of select="concat('0',.)"/>
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</xsl:when>
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<xsl:when test="starts-with(.,'-.')">
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<xsl:value-of select="concat('-0.', substring(.,3))"/>
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</xsl:when>
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<xsl:when test="substring(., string-length(.))='.'">
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<xsl:value-of select="concat(.,0)"/>
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</xsl:when>
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<xsl:otherwise>
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<xsl:value-of select="."/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- boolean, case-insensitive -->
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<xsl:template match="text()[translate(.,'TRUE','true')='true']">true</xsl:template>
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<xsl:template match="text()[translate(.,'FALSE','false')='false']">false</xsl:template>
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<!-- objects and arrays -->
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<xsl:template match="*" name="base">
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<xsl:choose>
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<!-- complete array -->
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<xsl:when test="(count(../*[name(current())=name()])=count(../*)) and count(../*[name(current())=name()])>1">
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<xsl:variable name="el" select="name()"/>
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<xsl:if test="not(following-sibling::*[name()=$el])">
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<xsl:text>[</xsl:text>
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<xsl:for-each select="../*[name()=$el]">
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<xsl:if test="position()!=1">,</xsl:if>
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<xsl:choose>
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<xsl:when test="not(child::node())">
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<xsl:text>null</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:apply-templates select="child::node()"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:for-each>
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<xsl:text>]</xsl:text>
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</xsl:if>
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</xsl:when>
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<!-- partial array -->
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<xsl:when test="count(../*[name(current())=name()])>1">
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<xsl:if test="not(preceding-sibling::*)">{</xsl:if>
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<xsl:variable name="el" select="name()"/>
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<xsl:if test="not(following-sibling::*[name()=$el])">
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<xsl:call-template name="escape-string">
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<xsl:with-param name="s" select="$el"/>
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</xsl:call-template>
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<xsl:text>:[</xsl:text>
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<xsl:for-each select="../*[name()=$el]">
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<xsl:if test="position()!=1">,</xsl:if>
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<xsl:choose>
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<xsl:when test="not(child::node())">
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<xsl:text>null</xsl:text>
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</xsl:when>
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<xsl:otherwise>
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<xsl:apply-templates select="child::node()"/>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:for-each>
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<xsl:text>]</xsl:text>
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<xsl:if test="following-sibling::*">,</xsl:if>
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</xsl:if>
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<xsl:if test="not(following-sibling::*)">}</xsl:if>
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</xsl:when>
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<!-- object -->
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<xsl:otherwise>
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<xsl:if test="not(preceding-sibling::*)">{</xsl:if>
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<xsl:call-template name="escape-string">
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<xsl:with-param name="s" select="name()"/>
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</xsl:call-template>
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<xsl:text>:</xsl:text>
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<!-- check type of node -->
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<xsl:choose>
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<!-- null nodes -->
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<xsl:when test="count(child::node())=0">null</xsl:when>
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<!-- other nodes -->
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<xsl:otherwise>
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<xsl:apply-templates select="child::node()"/>
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</xsl:otherwise>
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</xsl:choose>
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<!-- end of type check -->
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<xsl:if test="following-sibling::*">,</xsl:if>
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<xsl:if test="not(following-sibling::*)">}</xsl:if>
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</xsl:otherwise>
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</xsl:choose>
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</xsl:template>
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<!-- convert root element to an anonymous container -->
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<xsl:template match="/">
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<xsl:if test="$output='true'">
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<xsl:apply-templates select="node()"/>
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</xsl:if>
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</xsl:template>
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</xsl:stylesheet>
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