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HomeHomeDNN Open Source...DNN Open Source...Module ForumsModule ForumsForm and ListForm and ListCorrect Way to Decode URL stored in "Download" field in XSL?Correct Way to Decode URL stored in "Download" field in XSL?
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1/27/2016 2:55 PM
 

I have a field in a F&L called "PDF", which is a Download type. As a result, I have the following tokens to play with in XSL:

[PDF]
[PDF_UDT_Url]
[PDF_UDT_Caption]
[PDF_UDT_Original]

I'm trying to build my own href anchor using [PDF_UDT_Url], but no matter what I do, it always displays with escaped ampersands (& instead of simply &).

I've tried directly referencing the field as:

   <a href="{$PDF_UDT_Url}">My Link</a>

And I've tried creating a new xsl:param, assigning the value of PDF_UDT_Url to it, and then using the param, both with disable-output-escaping attribute to "yes" (neither "yes" nor "no" seem to affect it one way or the other):

    <xsl:param name="EncodedLink">

      <xsl:value-of select="udt:PDF_UDT_Url" disable-output-escaping="yes" />

    </xsl:param>

    <a href="{$EncodedLink}" target="_blank">My Link</a>

I feel like I'm not even close to the correct approach. 

What is the correct way to reference the non-escaped full path to a field of type "Download" in XSL, when attempting to build your own hrefs?

 

 
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1/28/2016 3:55 PM
 

Follow-up:

A key part of this mystery is something I just now noticed. When viewing the source HTML to the auto-generated link+caption, stored (by default) in the base field name (in this, in the [PDF] field), it reveals:

<a href="/LinkClick.aspx?fileticket=K3UEQbTGsA0%3d&amp;tabid=2373&amp;portalid=4&amp;mid=12900"  target="_blank">pt1187.pdf</a>

By default, this URL is *already* being encoded (incorrectly!), so it is no wonder that when it comes time to to manually build an href using [PDF_UDT_Url], the output is double-encoded:

<a href="/LinkClick.aspx?fileticket=K3UEQbTGsA0%3d&amp;amp;tabid=2373&amp;amp;portalid=4&amp;amp;mid=12900">Click Me</a>

Is this a bug in "Forms & List"? Or have a made a decision somewhere in the configuration of this list/field type that is making it behave as such?
 
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1/31/2016 1:40 PM
 
Hi Ken,
I don't exactly know what you wanted to show on your page after the XSLT transformation. Anyways, you would have to take note that the a-tag HREF attribute will NOT process the 'disable-output-escaping="yes|no"'. In your case the following would be the same. In all these cases, including your original post, the hyperlink "My Link" is a valid link that would open/download your [PDF_UDT_Url].

Your original post:
<xsl:param name="EncodedLink">
  <xsl:value-of select="udt:PDF_UDT_Url" disable-output-escaping="yes" />
</xsl:param>
<a href="{$EncodedLink}" target="_blank">My Link</a>

Equivalent:
<a href="{$EncodedLink}" target="_blank">My Link</a>
OR
<a>
    <xsl:attribute name="href">
        <xsl:value-of select="$EncodedLink"/>
    </xsl:attribute>
    My Link
</a>
OR
<a>
    <xsl:attribute name="href">
        <xsl:value-of select="$EncodedLink" disable-output-escaping="yes" />
    </xsl:attribute>
    My Link
</a>
OR
<xsl:element name="a">
    <xsl:attribute name="href">
        <xsl:value-of select="$EncodedLink"/>
    </xsl:attribute>
    My Link
</xsl:element>
<xsl:element name="a">
    <xsl:attribute name="href">
        <xsl:value-of select="$EncodedLink" disable-output-escaping="yes" />
    </xsl:attribute>
    My Link
</xsl:element>

On your follow-up post, I understand them as they are HTML encoded properly. Try the following and you'll see the difference. Then, compare them by viewing the page source. You can even copy the "/LinkClick.aspx?fileticket=..." and paste it in your browser to test if the links are really valid.
<div><xsl:value-of select="udt:PDF" disable-output-escaping="yes" /></div>
<div><xsl:value-of select="udt:PDF_UDT_Url" disable-output-escaping="yes" /></div>
<div><xsl:value-of select="$EncodedLink" /></div>
<div><xsl:value-of select="$EncodedLink" disable-output-escaping="yes" /></div>
<div><xsl:copy-of select="$EncodedLink" /></div>

If you just wanted to simply force the download to open in new window, you can use tick the 'Enable "Open in new window"' and 'Enforce Download' under List Settings of the the Field Editor. Optional: type in a static text like your "My Link" in the "Link Caption" of the same List Settings.

Finally, a not so beautiful option would be below:
<xsl:text disable-output-escaping="yes">&lt;a href="</xsl:text>
<xsl:value-of select="$EncodedLink" disable-output-escaping="yes" />
<xsl:text disable-output-escaping="yes">" &gt;My Link&lt;/a&gt;</xsl:text>

Hope this helps and I made sense...
Olan
 
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