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Article #16951

Re: differing results with getLastModified()

#16951
From: Richard Wilkman
Date: Wed, 06 Jan 1999 00:00
68 lines
2751 bytes
Rich:

Just a guess, but that 18k is probably the info needed to establish
the connection to the object and get enough info about it to get the
size?  If you make the images larger do you see the same 18k or is it
proportionally larger?

(After this we draw a pentagram in the sand and sacrifice a Duke plush
toy).

-Rich

Rich Downing wrote:
> 
> I posted the following to comp.lang.java.programmer but didn't get a
> response, so I thought I'd give it a try here.
> 
> I have an applet which downloads images from the web.  However, I only
> want to download the image if it has changed.  I am using:
> 
> .
> .
> .
> 
> URLConnection con = Url.openConnection();
> con.setUseCaches(false);
> lCurrentModified = con.getLastModified();
> etc.
> .
> .
> 
> I notice that in Netscape this causes about 300 bytes to be
> transferred, which is about what I would expect.  (The image size is
> appx 35k).
> 
> However, in both Internet Explorer (V 4) and using Opera with the Java
> 1.1.6 plugin between 17k and 18k is transferred.  That seems to be
> what the compressed image size might be.
> 
> Can it be that both these browsers are downloading the entire image
> when I am just requesting the time stamp?  This is beating my
> bandwidth to death.
> 
> Anyone have any ideas?????
> 
> Rich
> 
> ----------------------------------------------------------------------
> Richard V. Downing               Home: http://rvd.home.mindspring.com
> Senior Software Engineer                    Work: http://www.vsin.com
> VideoConferencing Systems, Inc.             Email: rvd@mindspring.com
> Norcross, Ga
> ------------ When surrounded by wolves 'tis best to howl -------------

-- 

=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Rich Wilkman
Senior Quality Assurance Engineer
Borland JBuilder Team

If you see something that looks like an opinion up there,
it's mine and mine alone.

Mail sent to me from the newsgroups won't bounce but will
be ignored.  If I have time, I'll respond, but you  have
a better chance if you confine your posts to the newsgroups
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
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From: Richard Wilkman <rwilkman@inprise.com>
Subject: Re: differing results with getLastModified()
Date: 1999/01/06
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