Re: [xsl] Resolving Netscape 4.7, and IE 5 issues with XSL

[Mike Brown <mike at skew dot org>]

Niranjan Perera wrote:
> In my demo.xsl, I have the following fragment
> 
>   <xsl:attribute
> name="href">getDemo.xml?Id=<xsl:value-of
> select="@Account"/></xsl:attribute>
> 
> where @Account is holding onto 'Hello World'

Not sure if you need to do more complex calculations to get your attribute
values, but a simpler syntax in this case would be:

<a href="getDemo.xml?Id={@Account}">click</a>

In any case, your output HTML contains

   href="getDemo.xml?Id=Hello World"

And you should note that the attribute value here is not a legal URI.
Raw space characters are not allowed in URIs.

> When I use IE 5, Netscape 6, or Opera 5 this is what
> is sent via the http call:
> 
> http://localhost/demo/getDemo.xml?Id=Hello%20World

Then IE 5, Netscape 6 and Opera 5 are being very nice to translate
your unescaped space for you. They are under no obligation to do that.

> When I use Netscape 4.7 this is what is sent via the http call
> 
> http://localhost/demo/getDemo.xml?Id=Hello World

Netscape 4.7 is not doing anything wrong, although one could argue
that since an href value must be a URI, any disallowed characters
in the value should be considered part of the URI and should be
escaped so as not to have this situation. But there is no requirement
that this actually happen.

You should just translate the spaces in the first place. If you are sure
that your server will accept '+' instead of ' ', you might try using the 
translate() function:

<a href="getDemo.xml?Id={translate(@Account,' ','+')}">click</a>

or, the way I would do it, would be to do a string replacement of ' ' with 
'%20':

<a>
  <xsl:attribute name="href">
    <xsl:text>getDemo.xml?Id=</xsl:text>
    <xsl:call-template name="replace">
      <xsl:with-param name="stringIn" select="@Account"/>
      <xsl:with-param name="charsIn" select="' '"/>
      <xsl:with-param name="charsOut" select="'%20'"/>
    </xsl:call-template>
  </xsl:attribute>
  <xsl:text>click</xsl:text>
</a>

The named template is below.

<xsl:template name="replace">
  <xsl:param name="stringIn"/>
  <xsl:param name="charsIn"/>
  <xsl:param name="charsOut"/>
  <xsl:choose>
    <xsl:when test="contains($stringIn,$charsIn)">
      <xsl:value-of select="concat(substring-before($stringIn,$charsIn),$charsOut)"/>
      <xsl:call-template name="replaceCharsInString">
        <xsl:with-param name="stringIn" select="substring-after($stringIn,$charsIn)"/>
        <xsl:with-param name="charsIn" select="$charsIn"/>
        <xsl:with-param name="charsOut" select="$charsOut"/>
      </xsl:call-template>
    </xsl:when>
    <xsl:otherwise>
      <xsl:value-of select="$stringIn"/>
    </xsl:otherwise>
  </xsl:choose>
</xsl:template>


Also please note that you are asking an HTML question, not an XSL question, 
really.

   - Mike
_____________________________________________________________________________
mike j. brown, software engineer at  |  xml/xslt: http://skew.org/xml/
webb.net in denver, colorado, USA    |  personal: http://hyperreal.org/~mike/

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