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  • jacob phillips 130 posts 372 karma points
    May 21, 2014 @ 01:50
    jacob phillips
    0

    replace & with &

    I have a macro that makes API calls.

    The API urls are generated by an outside system. This outside system strings together query params using a single ampersand.

    The url is passed as a macro param.

    What I want to do is replace the ampersands with &

    I tried this: 

    <xsl:variable name="APICALL" select="umbraco.library:Replace($APICALLUrlRaw, '&', '&amp;')" />

    But I just get: 

        Error occured

System.Xml.XmlException: An error occurred while parsing EntityName. Line 28, position 80.
at System.Xml.XmlTextReaderImpl.Throw(String res, Int32 lineNo, Int32 linePos)
at System.Xml.XmlTextReaderImpl.HandleEntityReference(Boolean isInAttributeValue, EntityExpandType expandType, Int32& charRefEndPos)
at System.Xml.XmlTextReaderImpl.ParseAttributeValueSlow(Int32 curPos, Char quoteChar, NodeData attr)
at System.Xml.XmlTextReaderImpl.ParseAttributes()
at System.Xml.XmlTextReaderImpl.ParseElement()
at System.Xml.XmlTextReaderImpl.ParseElementContent()
at System.Xml.Xsl.Xslt.XsltInput.ReadTextNodes()
at System.Xml.Xsl.Xslt.XsltInput.ReadNextSibling()
at System.Xml.Xsl.Xslt.XsltLoader.LoadInstructions(List`1 content, InstructionFlags flags)
at System.Xml.Xsl.Xslt.XsltLoader.LoadTemplate(NsDecl stylesheetNsList)
at System.Xml.Xsl.Xslt.XsltLoader.LoadRealStylesheet()
at System.Xml.Xsl.Xslt.XsltLoader.LoadDocument()
at System.Xml.Xsl.Xslt.XsltLoader.LoadStylesheet(XmlReader reader, Boolean include)

    I tried to disable the output escaping: 

    <xsl:output method="html" omit-xml-declaration="yes"/>
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  • Chriztian Steinmeier 2800 posts 8791 karma points MVP 8x admin c-trib
    May 21, 2014 @ 02:05
    Chriztian Steinmeier
    100

    Hi Jacob,

    Depending on where the string is used, you may not even need to escape it - but if you have to, you need to escape the ampersands you're using. Yes, it's tricky, but you're doing the equivalent of including a double-quote character in a double-quoted string. The ampersand is special in XML, so you need to escape it:

    <xsl:variable name="APICALL" select="umbraco.library:Replace($APICALLUrlRaw, '&amp;', '&amp;amp;')" />

    /Chriztian

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  • jacob phillips 130 posts 372 karma points
    May 22, 2014 @ 00:05
    jacob phillips
    0

    It is used in 

    umbraco.library:GetXmlDocumentByUrl()

    I did not test it again, but I recall from when I first did the macro that the raw ampersand broke it.

    Nevertheless, the replacement you have suggested works. Awesome.

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