JPEG Comments

**Murray** · Jul 23 '05, 10:49 AM

Re: JPEG Comments

"Dennis Marks" <denmarks@none. net> wrote in message
news:0805200410 17159233%denmar ks@none.net...[color=blue]
> I have been told that there is no way to access the JPEG comment field
> using javascript. I have used a hex editor and can see the comment near
> the beginning of the JPEG file. Is there any way to access the source
> of a JPEG picture that has been loaded and then possibly extract and
> manipulate the data to extract the comment?[/color]

Not using Javascript. Javascript only has access to the HTML dom tree, not
the actual binary data contained in the image.

**Evertjan.** · Jul 23 '05, 10:49 AM

Re: JPEG Comments

Murray wrote on 08 mei 2004 in comp.lang.javas cript:[color=blue]
> "Dennis Marks" <denmarks@none. net> wrote in message
> news:0805200410 17159233%denmar ks@none.net...[color=green]
>> I have been told that there is no way to access the JPEG comment
>> field using javascript. I have used a hex editor and can see the
>> comment near the beginning of the JPEG file. Is there any way to
>> access the source of a JPEG picture that has been loaded and then
>> possibly extract and manipulate the data to extract the comment?[/color]
>
> Not using Javascript. Javascript only has access to the HTML dom tree,
> not the actual binary data contained in the image.[/color]

Not quite true.

Serverside code, either js or vbs, has access.

Clientside code, either js or vbs, has NOT.

--
Evertjan.
The Netherlands.
(Please change the x'es to dots in my emailaddress)

**Dennis Marks** · Jul 23 '05, 10:49 AM

Re: JPEG Comments

In article <Xns94E3D4599E9 77eejj99@194.10 9.133.29>, Evertjan.
<exjxw.hannivoo rt@interxnl.net > wrote:
[color=blue]
> Murray wrote on 08 mei 2004 in comp.lang.javas cript:[color=green]
> > "Dennis Marks" <denmarks@none. net> wrote in message
> > news:0805200410 17159233%denmar ks@none.net...[color=darkred]
> >> I have been told that there is no way to access the JPEG comment
> >> field using javascript. I have used a hex editor and can see the
> >> comment near the beginning of the JPEG file. Is there any way to
> >> access the source of a JPEG picture that has been loaded and then
> >> possibly extract and manipulate the data to extract the comment?[/color]
> >
> > Not using Javascript. Javascript only has access to the HTML dom tree,
> > not the actual binary data contained in the image.[/color]
>
> Not quite true.
>
> Serverside code, either js or vbs, has access.
>
> Clientside code, either js or vbs, has NOT.[/color]

Too bad. The comment would be a great place to keep descriptive data to
be displayed with a picture.

--
Dennis Marks

http://www.dcs-chico.com/~denmarks/

To reply change none to dcsi.

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**Matt Kruse** · Jul 23 '05, 10:50 AM

Re: JPEG Comments

Dennis Marks wrote:[color=blue]
> Too bad. The comment would be a great place to keep descriptive data
> to be displayed with a picture.[/color]

There are a number of server-side image gallery applications which do
exactly this :)

--
Matt Kruse
Javascript Toolbox: http://www.mattkruse.com/javascript/