Detection of file edit dates

[howardg@rbnz.govt.nz]

I was wanting to use Javascript to detect the edit date on a series
of .jpg files, and return that date in the corresponding HTML page,
as in "Chart was last updated...". Does anyone know if this is
possible, and if so how I would go about it?
Many thanks
Graham

[erikd@nospam.wanted.here]

Re: Detection of file edit dates

On 29 Nov 2004 17:04:18 +1300, howardg@rbnz.go vt.nz wrote:
[color=blue]
>I was wanting to use Javascript to detect the edit date on a series
>of .jpg files, and return that date in the corresponding HTML page,
>as in "Chart was last updated...". Does anyone know if this is
>possible, and if so how I would go about it?[/color]

I'm using a modified version of a script located at
http://www.cgiscript.net/site_javascripts_date_time.htm to do it for
the page, it should be possible to do the same for a file.

--
Erik

[Dr John Stockton]

Re: Detection of file edit dates

JRS: In article <Xns95B0AD9A115 42howardgrbnzgo vtnz@172.27.20. 6>, dated
Mon, 29 Nov 2004 17:04:18, seen in news:comp.lang. javascript,
howardg@rbnz.go vt.nz posted :[color=blue]
>I was wanting to use Javascript to detect the edit date on a series
>of .jpg files, and return that date in the corresponding HTML page,
>as in "Chart was last updated...". Does anyone know if this is
>possible, and if so how I would go about it?[/color]

If you use 32-bit Windows, and perhaps even if not, you can use
Javascript in WSH to get the dates and to edit the HTML page; that
answers your first question as stated.

To answer your intended question, I doubted it. Testing locally, I see
that document.images[0].fileCreatedDat e does show me a date string
(not necessarily correct), so something like that *might* work on the
Web for images that have actually been fetched.

But for annotating links to images that might be fetched ...

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 IE 4 ©
<URL:http://www.jibbering.c om/faq/> JL/RC: FAQ of news:comp.lang. javascript
<URL:http://www.merlyn.demo n.co.uk/js-index.htm> jscr maths, dates, sources.
<URL:http://www.merlyn.demo n.co.uk/> TP/BP/Delphi/jscr/&c, FAQ items, links.

[howardg@rbnz.govt.nz]

Re: Detection of file edit dates

Dr John Stockton <spam@merlyn.de mon.co.uk> wrote in
news:3r+B2FC6my qBFwLQ@merlyn.d emon.co.uk:
[color=blue][color=green]
>>I was wanting to use Javascript to detect the edit date on a series
>>of .jpg files, and return that date in the corresponding HTML page,
>>as in "Chart was last updated...". Does anyone know if this is
>>possible, and if so how I would go about it?[/color]
>
> If you use 32-bit Windows, and perhaps even if not, you can use
> Javascript in WSH to get the dates and to edit the HTML page; that
> answers your first question as stated.
>
> To answer your intended question, I doubted it. Testing locally, I see
> that document.images[0].fileCreatedDat e does show me a date string
> (not necessarily correct), so something like that *might* work on the
> Web for images that have actually been fetched.
>[/color]
Thanks for your reply - i'm a bit of a novice at this - are you able to
be more specific in terms of the possible code for referencing a jpeg? Thanks
again.

[RobB]

Re: Detection of file edit dates

howardg@rbnz.go vt.nz wrote in message news:<Xns95B184 6033CF4howardgr bnzgovtnz@172.2 7.20.6>...[color=blue]
> Dr John Stockton <spam@merlyn.de mon.co.uk> wrote in
> news:3r+B2FC6my qBFwLQ@merlyn.d emon.co.uk:
>[color=green][color=darkred]
> >>I was wanting to use Javascript to detect the edit date on a series
> >>of .jpg files, and return that date in the corresponding HTML page,
> >>as in "Chart was last updated...". Does anyone know if this is
> >>possible, and if so how I would go about it?[/color]
> >
> > If you use 32-bit Windows, and perhaps even if not, you can use
> > Javascript in WSH to get the dates and to edit the HTML page; that
> > answers your first question as stated.
> >
> > To answer your intended question, I doubted it. Testing locally, I see
> > that document.images[0].fileCreatedDat e does show me a date string
> > (not necessarily correct), so something like that *might* work on the
> > Web for images that have actually been fetched.
> >[/color]
> Thanks for your reply - i'm a bit of a novice at this - are you able to
> be more specific in terms of the possible code for referencing a jpeg? Thanks
> again.[/color]

The properties you'd be interested in - fileModifiedDat e /
fileUpdatedDate are generally, by specification, members of Document
objects, not Image objects. MSIE, naturally, breaks the pattern,
making these available client-side for pix as well.

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dt d">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
<head>
<title>untitled </title>
<script type="text/javascript">
//<![CDATA[

onload = function()
{
var img = document.getEle mentById('foo') ;
var s1 = document.create TextNode('Last updated: ' +
(img.fileUpdate dDate || 'unknown'));
var s2 = document.create TextNode('Last modified: ' +
(img.fileModifi edDate || 'unknown'));
var d = document.getEle mentById('box') ;
d.appendChild(s 1);
d.appendChild(d ocument.createE lement('hr'));
d.appendChild(s 2);
}

//]]>
</script>
</head>
<body>
<div id="box" style="width:20 0px;font:14px monospace;">
<img id="foo" src="http://www.geocities.c om/area51/rampart/4503/acon/banana.jpg"
/>
</div>
</body>
</html>

[Dr John Stockton]

Re: Detection of file edit dates

JRS: In article <Xns95B1846033C F4howardgrbnzgo vtnz@172.27.20. 6>, dated
Tue, 30 Nov 2004 13:01:09, seen in news:comp.lang. javascript,
howardg@rbnz.go vt.nz posted :[color=blue]
>Dr John Stockton <spam@merlyn.de mon.co.uk> wrote in
>news:3r+B2FC6m yqBFwLQ@merlyn. demon.co.uk:
>[color=green][color=darkred]
>>>I was wanting to use Javascript to detect the edit date on a series
>>>of .jpg files, and return that date in the corresponding HTML page,
>>>as in "Chart was last updated...". Does anyone know if this is
>>>possible, and if so how I would go about it?[/color]
>>
>> If you use 32-bit Windows, and perhaps even if not, you can use
>> Javascript in WSH to get the dates and to edit the HTML page; that
>> answers your first question as stated.
>>
>> To answer your intended question, I doubted it. Testing locally, I see
>> that document.images[0].fileCreatedDat e does show me a date string
>> (not necessarily correct), so something like that *might* work on the
>> Web for images that have actually been fetched.
>>[/color]
>Thanks for your reply - i'm a bit of a novice at this - are you able to
>be more specific in terms of the possible code for referencing a jpeg? Thanks
>again.[/color]

If I had known more, I would have written more.

--
© John Stockton, Surrey, UK. ?@merlyn.demon. co.uk Turnpike v4.00 MIME. ©
Web <URL:http://www.merlyn.demo n.co.uk/> - FAQish topics, acronyms, & links.
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[howardg@rbnz.govt.nz]

Re: Detection of file edit dates

That's helpful, thanks very much!