ibm-datapower在使用XSLT的文本数据的结果XML中用“>”代替“>”，用“ <”代替“ <”

Question

In one of my application, I am trying to convert the response of my service with the help of xslt on datapower. In one of the response scenario, I need to show an xml something like below:

<data contentType="text/xml;charset=utf-8" contentLength="80"><![CDATA[Your request cannot be processed]]></data>

But my XSLT fails on datapower and it shows ">" and "<" in place of ">" and "<" .

Below are my some of the attempted templates. Kindly have a look and suggest any correction:

Attempt 1:Tried with "> " and "<"

<xsl:param name="mask"   select="'Your request cannot be processed'"/>

         <xsl:template match="*" mode="copyFault">
            <xsl:text disable-output-escaping="yes">&lt;data contentType="text/xml;charset=utf-8" contentLength="80"&gt;&lt;![CDATA[</xsl:text>   
            <xsl:value-of select="$mask" />
            <xsl:text disable-output-escaping="yes">]]&gt;&lt;/data&gt;</xsl:text>           
          </xsl:template>

Attempt 2:Tried with HEX values

<xsl:param name="mask"   select="'Your request cannot be processed'"/>
          <xsl:variable name="lessThan" select="'&#x3C;'"/>
          <xsl:variable name="GreaterThan" select="'&#x3E;'"/>

         <xsl:template match="*" mode="copyFault">
            <xsl:value-of  disable-output-escaping = "yes" select="$lessThan"/>
            <xsl:text>data contentType="text/xml;charset=utf-8" contentLength="80"</xsl:text>
            <xsl:value-of disable-output-escaping = "yes" select="$GreaterThan"/>
            <xsl:value-of  disable-output-escaping = "yes" select="$lessThan"/>
            <xsl:text>![CDATA[</xsl:text>
            <xsl:value-of select="$mask" />
            <xsl:text>]]</xsl:text>
            <xsl:value-of disable-output-escaping = "yes" select="$GreaterThan"/>
            <xsl:value-of  disable-output-escaping = "yes" select="$lessThan"/>
            <xsl:text>/data</xsl:text>
            <xsl:value-of disable-output-escaping = "yes" select="$GreaterThan"/>            
          </xsl:template>

Please let me know what should I do to get the xml in proper format from datapower.

Thanks.

Answer 1

The usual way in XSLT to output a certain XML element is a literal result element so using

<data contentType="text/xml;charset=utf-8" contentLength="80">Your request cannot be processed</data>

in your XSLT will then output that element in the result. If you want to populate the element with a variable or parameter value then use eg

<data contentType="text/xml;charset=utf-8" contentLength="80"><xsl:value-of select="$mask"/></data>

If the XSLT processor is in charge of serializing the result to a file or string and you want some element like the data element to have a CDATA section as the content then declare eg <xsl:output cdata-section-elements="data"/> as a child of xsl:stylesheet (or xsl:transform if you have named the root element that way).

Answer 2

disable-output-escaping is a thoroughly nasty feature: it doesn't work on all processors, and if it's supported at all, it only works when the transformation output is fed directly into an XSLT-aware serializer, so it depends on how you are running the transformation.

It's much better to avoid disable-output-escaping when you can, and there's certainly no evidence you need it here. The requirement to output a CDATA section is somewhat unusual (any well-written application reading XML doesn't care whether the text is in a CDATA section or not), but if you really need it, then you can usually achieve it using <xsl:output cdata-section-elements="data"/> . (Though again, this only works if the output is fed into an XSLT-aware serializer.)

Certainly, generating start and end tags using disable-output-escaping is very poor practice.