Re: [xsl] The UNIX epoch, or time since Jan 01, 1970

["G. Ken Holman" <gkholman@xxxxxxxxxxxxxxxxxxxx>]

At 2012-05-21 17:06 +0100, Florent Georges wrote:
>   As part of sending an OAuth request to connect to Twitter, I have to
> get a timestamp, as the number of seconds elapsed from Jan 01, 1970
> (AKA the UNIX epoch).  The simplest solution I could come with is the
> following:

Remember you can do arithmetic with durations.  I think this is even simpler:

T:\ftemp>xslt2 florent.xsl florent.xsl
<?xml version="1.0" encoding="UTF-8"?>1337617644.811
T:\ftemp>xslt2 florent.xsl florent.xsl
<?xml version="1.0" encoding="UTF-8"?>1337617649.455
T:\ftemp>type florent.xsl
<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform";
     xmlns:xs="http://www.w3.org/2001/XMLSchema";
     xmlns:my="urn:X-florent"
  version="2.0">

<xsl:template match="/">
  <xsl:value-of select="my:current-timestamp()"/>
</xsl:template>

    <xsl:function name="my:current-timestamp" as="xs:string">
       <!-- the UNIX epoch -->
       <xsl:variable name="epoch" 
select="xs:dateTime('1970-01-01T00:00:00Z')"/>

       <!-- time since then -->
       <xsl:variable name="diff"  select="current-dateTime() - $epoch"/>
       <!-- number of seconds -->
       <xsl:sequence select="string($diff div xs:dayTimeDuration('PT1S'))"/>
    </xsl:function>

</xsl:stylesheet>
T:\ftemp>

I hope this helps.

. . . . . . . . Ken

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