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Date:      Mon, 4 May 1998 11:36:46 -0400 (EDT)
From:      "Matthew N. Dodd" <winter@jurai.net>
To:        Tim Vanderhoek <ac199@hwcn.org>
Cc:        Tim Vanderhoek <hoek@hwcn.org>, Eivind Eklund <eivind@yes.no>, Matthew Hunt <mph@FreeBSD.ORG>, chat@FreeBSD.ORG
Subject:   Re: cvs commit: ports/www/ijb - Imported sources
Message-ID:  <Pine.BSF.3.96.980504112513.20104S-100000@sasami.jurai.net>
In-Reply-To: <Pine.BSF.3.96.980504021909.332C-100000@localhost>

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On Mon, 4 May 1998, Tim Vanderhoek wrote:
> Bah.  And I suppose your email reader is going to pull this
> paragraph but not pull the next one.  Perhaps you should pull
> alternating words from my message.  That would certainly save
> your bandwidth. 

Again, you fail to understand the nature of HTML/HTTP.

> > We're talking about software that turns off loading of images that match a
> > specific pattern.  This isn't filtering as such.
> 
> No we're not.  We're talking about filtering ads.  Eivind long
> ago agreed that a program which filters large, fat, unnecessary
> gifs has definate potential use.  I agreed with him implicitly.

No, in the case where we filter ads we do so because they cause specific
pages to be delayed in loading.  Altavista for example would not have
their ads filtered because they load quickly and are fairly well
integrated with the page.

By filter I mean 'do not load images that match a specific set of
criteria'.

Since you're somewhat slow I'll explain how HTML/HTTP work with respect to
loading these images.

We've got an HTML doccument: http://www.foo.com/foo.html

<HTML>
  <HEAD>
    <TITLE>Foo</TITLE>
  </HEAD>
  <BODY>
    <H1>Foo</H1>
    <IMG SRC="/cgi-bin/web-banner.cgi" ALT="banner">
    <P>
       This is the content of foo.  This is only the content.
    <HR>
    <IMG SRC="/images/foo.gif" ALT="FOO!")
  </BODY>
</HTML>

Two additional requests are needed in order to completly load all
components of this page.  The page merely asks us to load them.  Our
browser is under no obligaton to honor these requests (we can even turn of
image loading completly if we desire.)  By use of IJB and others, we give
ourselves the ability to do a number of useful things (not load images,
de-interlace interlaced gifs, etc.)  

This is the nature of the web.  Complaining about it does no good.  Accept
it, move on.

Just think of what web caching proxies do to banner stats on static pages.
(Which is why most banners are on pages are dynamic and provide hints for
caching proxies not to cache them.)

/* 
   Matthew N. Dodd		| A memory retaining a love you had for life	
   winter@jurai.net		| As cruel as it seems nothing ever seems to
   http://www.jurai.net/~winter | go right - FLA M 3.1:53	
*/


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