如何处理XSL中的非法HTML字符 [英] How to handle the illegal HTML characters in XSL

问题描述

我有一个存储数据的XML文件。我正在使用XSL从该XML文件生成HTML文件。当我尝试这样做时，出现错误非法HTML字符：小数点150

我不允许更改XML文件。我必须在XSL中将这一个和许多其他非法字符映射为合法字符（可以是任何）。所以它必须以通用的方式进行映射，不仅适用于某种类型的字符。 您可以定义一个字符映射将不允许的字符映射到允许的字符，例如空格：

 < xsl：output indent =yes方法=htmluse-character-maps =m1/> 
 
< xsl：character-map name =m1> 
 < / xsl：character-map>根据 http://www.w3.org/TR/xslt-xquery-serialization/#HTML_CHARDATA 这些是控制字符＃x7F-＃x9F所以使用 
 
 
 < xsl：template match =text（）> 
< xsl：value-of select =replace（。，'[&＃x007F;  - &＃x009F;]'，''）/> 
< / xsl：template> 
  
应确保输入文档中文本节点中的那些字符被替换为空格。
 
 
 
作为另一种选择，您可以考虑使用XHTML命名空间中的元素以及输出方法 xhtml 输出XHTML。
 
 
 
根据字符列表，将所有非法控制字符映射到空间的完整字符映射是
 
 
 < xsl：character-map 
 name =no-control-characters> 
                                 < / xsl：character-map> 
  
我用XSLT 2.0和Saxon生成了这个列表，使用 
 
 
 < xsl：stylesheet version =2.0xmlns：xsl =http://www.w3.org/1999/XSL/Transform
 xmlns ：xs =http://www.w3.org/2001/XMLSchema
 xmlns：axsl =http://www.w3.org/1999/XSL/TransformAlias
 exclude-result -prefixes =xs axsl> 
 
 < xsl：param name =endas =xs：integerselect =159/> 
 
< xsl：param name =replacementas =xs：stringselect =''/> 
 
< xsl：namespace-alias stylesheet-prefix =axslresult-prefix =xsl/> 
 
  
< xsl：character-map name =character-reference> 
 < / xsl：character-map> 
 
< xsl：template name =main> 
< axsl：character-map name =no-control-characters> 
< xsl：for-each select =$ start to $ end> 
< axsl：输出字符字符=«＃{。};字符串= {$替换}/> 
< / xsl：for-each> 
< / axsl：character-map> 
< / xsl：template> 
 
< / xsl：stylesheet> 
  
 
I have an XML file which stores data. I am using an XSL to generate HTML files from that XML file. When I try to do that I get the error Illegal HTML character: decimal 150


I am not allowed to change the XML file. I have to map that one and many other illegal characters to a legal character (it can be any) in XSL. So it has to do that mapping in a generic way not only for one type of character.
解决方案
You can define a character map that maps the characters not allowed to one allowed, for instance a space:
<xsl:output indent="yes" method="html" use-character-maps="m1"/>

<xsl:character-map name="m1">
  <xsl:output-character character="&#150;" string=" "/>
</xsl:character-map>
As an alternative, use a template replacing all illegal characters, according to http://www.w3.org/TR/xslt-xquery-serialization/#HTML_CHARDATA these are control characters #x7F-#x9F so using
<xsl:template match="text()">
  <xsl:value-of select="replace(., '[&#x007F;-&#x009F;]', ' ')"/>
</xsl:template>
should make sure those characters in text nodes in the input document are replaced by a spaces.

As another alternative, you could consider to output XHTML with elements in the XHTML namespaces and output method xhtml.

Based on the list of characters, a full character map mapping all illegal control characters to a space is
<xsl:character-map
                   name="no-control-characters">
   <xsl:output-character character="&#127;" string=" "/>
   <xsl:output-character character="&#128;" string=" "/>
   <xsl:output-character character="&#129;" string=" "/>
   <xsl:output-character character="&#130;" string=" "/>
   <xsl:output-character character="&#131;" string=" "/>
   <xsl:output-character character="&#132;" string=" "/>
   <xsl:output-character character="&#133;" string=" "/>
   <xsl:output-character character="&#134;" string=" "/>
   <xsl:output-character character="&#135;" string=" "/>
   <xsl:output-character character="&#136;" string=" "/>
   <xsl:output-character character="&#137;" string=" "/>
   <xsl:output-character character="&#138;" string=" "/>
   <xsl:output-character character="&#139;" string=" "/>
   <xsl:output-character character="&#140;" string=" "/>
   <xsl:output-character character="&#141;" string=" "/>
   <xsl:output-character character="&#142;" string=" "/>
   <xsl:output-character character="&#143;" string=" "/>
   <xsl:output-character character="&#144;" string=" "/>
   <xsl:output-character character="&#145;" string=" "/>
   <xsl:output-character character="&#146;" string=" "/>
   <xsl:output-character character="&#147;" string=" "/>
   <xsl:output-character character="&#148;" string=" "/>
   <xsl:output-character character="&#149;" string=" "/>
   <xsl:output-character character="&#150;" string=" "/>
   <xsl:output-character character="&#151;" string=" "/>
   <xsl:output-character character="&#152;" string=" "/>
   <xsl:output-character character="&#153;" string=" "/>
   <xsl:output-character character="&#154;" string=" "/>
   <xsl:output-character character="&#155;" string=" "/>
   <xsl:output-character character="&#156;" string=" "/>
   <xsl:output-character character="&#157;" string=" "/>
   <xsl:output-character character="&#158;" string=" "/>
   <xsl:output-character character="&#159;" string=" "/>
</xsl:character-map>
I generated that list with XSLT 2.0 and Saxon, using
<xsl:stylesheet version="2.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  xmlns:axsl="http://www.w3.org/1999/XSL/TransformAlias"
  exclude-result-prefixes="xs axsl">

<xsl:param name="start" as="xs:integer" select="127"/>
<xsl:param name="end" as="xs:integer" select="159"/>

<xsl:param name="replacement" as="xs:string" select="' '"/>

<xsl:namespace-alias stylesheet-prefix="axsl" result-prefix="xsl"/>

<xsl:output method="xml" indent="yes" use-character-maps="character-reference"/>

<xsl:character-map name="character-reference">
  <xsl:output-character character="«" string="&amp;"/>
</xsl:character-map>

<xsl:template name="main">
  <axsl:character-map name="no-control-characters">
    <xsl:for-each select="$start to $end">
      <axsl:output-character character="«#{.};" string="{$replacement}"/>
    </xsl:for-each>
  </axsl:character-map>
</xsl:template>

</xsl:stylesheet>


                        
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