how to use getnodeidbyurl(string) - Questions/Suggestions

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Claushingebjerg 936 posts 2571 karma points

Aug 16, 2011 @ 19:14

How to use GetNodeIdByUrl(String)?

Questions/Suggestions

Im trying to get a page id from a url on my site. The reason is i need to know the id of the referring page, so combining

umbraco.library:RequestServerVariables('http_referer')

With

<xsl:value-of select="ucomponents.urls:GetNodeIdByUrl('url')"/>

Would enable me to do this...

But whatever i pass to GetNodeIdByUrl(String) returns this error

System.Xml.XPath.XPathException: Expression must evaluate to a node-set. 
at MS.Internal.Xml.XPath.XPathParser.ParseNodeTest(AstNode qyInput, AxisType axisType, XPathNodeType nodeType) 
at MS.Internal.Xml.XPath.XPathParser.ParseStep(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseRelativeLocationPath(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseLocationPath(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParsePathExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseUnionExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseUnaryExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseMultiplicativeExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseAdditiveExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseRelationalExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseEqualityExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseAndExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseOrExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParsePredicate(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseStep(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseRelativeLocationPath(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseRelativeLocationPath(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseLocationPath(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParsePathExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseUnionExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseUnaryExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseMultiplicativeExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseAdditiveExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseRelationalExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseEqualityExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseAndExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseOrExpr(AstNode qyInput) 
at MS.Internal.Xml.XPath.XPathParser.ParseXPathExpresion(String xpathExpresion) 
at System.Xml.XPath.XPathExpression.Compile(String xpath, IXmlNamespaceResolver nsResolver) 
at System.Xml.XPath.XPathNavigator.Select(String xpath) 
at System.Xml.XmlNode.SelectNodes(String xpath) 
at System.Xml.XmlNode.SelectSingleNode(String xpath) 
at uComponents.Core.XsltExtensions.Nodes.GetNodeIdByUrl(String url) 
at uComponents.Core.XsltExtensions.Urls.GetNodeIdByUrl(String url)

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Lee Kelleher 4020 posts 15802 karma points MVP 13x admin c-trib

Aug 16, 2011 @ 19:38

0

Hi Claushingebjerg,

The "GetNodeIdByUrl" extension doesn't work with absolute URLs (ones that start with "http://") ... it was intended to work with the URL's path - anything after the TLD (e.g. ".com") from the forward-slash onwards.

I've tested a few variations, but didn't get any errors/exceptions. For the URLs that it couldn't find, it just returned a "-1".

What values are you getting for "http_referer"? I'd like to replicate this error - so we can fix it. :-)

Cheers, Lee

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Claushingebjerg 936 posts 2571 karma points

Aug 16, 2011 @ 20:19
0
Well actually im not even using the 'http_referer' yet

Heres what i have
```
 <xsl:value-of select="ucomponents.urls:GetNodeIdByUrl('gaver.aspx')"/>
```
where gaver.aspx is a page with the id of 1061. But i get the above error

Ive tried with

gaver.aspx

'/gaver.aspx'

/gaver.aspx

But the all return the same error.

What throws me, is the error about a node-set?!?! why would it need a node-set

could i have included the extension wrong??? i have:
```
 xmlns:ucomponents.urls="urn:ucomponents.urls"
 exclude-result-prefixes="msxml umbraco.library Exslt.ExsltCommon Exslt.ExsltDatesAndTimes Exslt.ExsltMath Exslt.ExsltRegularExpressions Exslt.ExsltStrings Exslt.ExsltSets ucomponents.urls ">
```
```
 
```
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Chriztian Steinmeier 2798 posts 8788 karma points MVP 7x admin c-trib

Aug 16, 2011 @ 21:54
0
Hi Claus,

I just tried it and got the error on the first run, but subsequently couldn't reproduce it...

I *think* the error might have something to do with returning just a number where the XSLT processor expects to output an XML document - do you get the error when assigning the value to a variable as well? E.g.:
```
<xsl:variable name="nodeId" select="ucom:GetNodeIdByUrl('gaver.aspx')" />
```
(For working URLs I found that all versions with or without leading/trailing slashes; with or without '.aspx' reliably returned the right Id)

/Chriztian
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Claushingebjerg 936 posts 2571 karma points

Aug 17, 2011 @ 08:34

0

Hmmmm maybe it needed an app pool recycle.

It Worked this morning without changing at thing?!?!?

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Lee Kelleher 4020 posts 15802 karma points MVP 13x admin c-trib

Aug 17, 2011 @ 09:25

0

Glad that it's working now. Strange that you both got errors with it - I couldn't reproduce the error with my tests.

Best to keep an eye on it and let me know if anything strange happens again - we'll try to get a fix in place.

Cheers, Lee.

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