Babble v1 156

babble-digest Friday, January 23 1998 Volume 01 : Number 156

In this issue:
[Fwd: tech: cache flushing?]
A suggestion: Urging User Upgrades
babble-digest V1 #155
Now that there is a color chart board...is there a...
netscape free! -and then some... (kinda long)
Re: tech: cache flushing?
RE: Targetting frames
Re: Netscape 3.0 Gold -Background Bug?

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Date: Thu, 22 Jan 1998 15:52:04 -0500
From: Andrew Zimmerman <zimmerma@hear.net>
Subject: [Fwd: tech: cache flushing?]

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Message-ID: <34C7B13F.D46E4E4F@hear.net>
Date: Thu, 22 Jan 1998 15:51:17 -0500
From: Andrew Zimmerman <zimmerma@hear.net>
X-Mailer: Mozilla 4.04 (Macintosh; I; PPC)
MIME-Version: 1.0
To: egan jones <egan@mail.utexas.edu>
Subject: Re: tech: cache flushing?
References: <l03102803b0ed530f5858@[128.83.193.40]>
Content-Type: text/plain; charset=us-ascii; x-mac-type="54455854"; x-mac-creator="4D4F5353"
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Mr. Jones:

I believe there exists an HTTP header called "cache-control : no-cache" that will
do what you are requesting, but sysadmin/network admin is way out of my league.

On a related note: we have noticed that sometimes Netscape does not display
updated pages even when the client flushes its cache. We have not determined
exactly where the problem lies. Here is an example:

An html file contains a specific graphic file that resides on the server. The
image file is replaced on the server with the new version. Netscape continues to
display the old version despite the client cache being dumped. This has happened
on NS 3 and 4. And it is not just related to image files, but Java applets and
Javascripts as well.

Apparently this behavior happens even if another client accesses the new file
without ever having accessed the original file.

We believe it is a problem with our proxy server (Solaris on Sun), but we are
investigating.

I'm no specialist on this, just relaying on what was discussed by our sysadmin and
application development team this morning.

- -AZ

egan jones wrote:

> Producers and Babblers (again)-
>
> Another problem I thought I'd run by you guys. The aformentioned project
> (from "nn4.x and css" post) is a CD-ROM project running NNav 4.0x as the
> front-end.
>
> We deliver about 40 qt movies (3-18MB/ea) and are having problems with them
> clogging the memory cache (get messages like "memory getting low, please
> try quitting other applications and closing windows" after a few movies
> have played, depending on amount of ram in system). We can't/don't want to
> rely on the end-user to be savvy enough to do this. (error and warning
> messages are never pretty either.)
>

<snip>

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------------------------------

Date: Thu, 22 Jan 1998 17:55:31 -0500
From: "Lance Arthur" <lance@dbtinc.com>
Subject: A suggestion: Urging User Upgrades

Some time back there was a discussion on this list about banding together as
designers to get users to upgrade their browsers. At least I think it was on
this list. I get confused, sometimes. Then I drink coffee, and a strange
calm... but I digress.

At any rate, I've come up with one way to try to convince users to upgrade
at my home page. I invite all interested parties to take a look-see:

http://glassdog.com/u3/

Ignore or investigate at your leisure.

Lance

http://glassdog.com

"Undulating, plush, cuddly, machine-washable,
cannibalistic vegetables driving equally
plush vehicles on a mission of destruction."

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Date: Thu, 22 Jan 1998 20:07:44 EST
From: TheGilster <TheGilster@aol.com>
Subject: Now that there is a color chart board...is there a...

Dear list,
As I am making plans to buy that palette board from R35, I was wondering
if there is a giant board I can put in my office that has the uniform
JavaScript code that is the same in IE and NS.

Thanks,
Gil Kruger
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------------------------------

Date: Thu, 22 Jan 1998 19:29:17 -0600
From: egan jones <egan@mail.utexas.edu>
Subject: netscape free! -and then some... (kinda long)

Netscape is Free!

You can now download, distribute, or bundle Netscape with your products!

Source code is also freely available.
(now I can fix the bugs I complain about... if only I knew how:)

Here's what I got in email from DevEdge. (and no, I don't work for them)

egan

>Today Netscape unveiled several announcements regarding our
>client software and development direction. Because our developers
>are so vital to our success, I wanted to make sure you all were among
>the first to know. Therefore, we're sending you this special edition
>of DevEdge News which tells you about our plans to make Netscape
>Communicator source code and client software free, an unlimited
>distribution policy, and what this means for existing customers. I think
>you'll find these developments as exciting as we do in bringing us all
>to the next level of Internet software development.
>-- Sincerely,
>Marc Andreessen
>Co-founder and Executive VP of Products
>
>
>Netscape DevEdge News Special Bulletin
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>An alert for the Netscape developer community
>~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>January 22, 1998
>
>* Netscape To Make Source Code and Internet Client Free
>* Netscape Everywhere -- Unlimited Distribution of the Client
>* Promotional Offers for Existing Customers
>
>* NETSCAPE TO MAKE SOURCE CODE AND CLIENT FREE
>Netscape announced today that before the end of the first quarter of
>1998, it will make its source code for Netscape Communicator 5.0
>freely available on the Internet and that effective immediately its
>world-class Internet client is free.
>
>This bold move enables Netscape to draw from the creative power of
>thousands of programmers on the Internet by incorporating their best
>enhancements into future versions of Netscapeís software. This strategy
>is designed to accelerate development and free distribution of future
>high-quality versions of Netscape Communicator to business customers and
>individuals, further seeding the market for Netscapeís enterprise solutions
>and Netcenter business.
>
>Availability of source code will start with the first developer
>pre-release of Communicator 5.0 expected by late March. Netscape intends
>to host the source code licensing on its web site and create a premiere
>place on the web for the developer community to post their enhancements,
>engage in discussion and receive support as they greatly accelerate
>development of a world-class Internet client.
>
>Effective immediately, the Netscape client is available for free on
>the Netscape web site. Netscape Communicator Pro, with its expanded
>features, will be sold, but at a reduced price. The move to a free client
>makes it easier for individuals and enterprise customers to choose
>Netscape solutions plus online services offered within Netcenter.
>
>More about this announcement is available in a press release at:
>http://home.netscape.com/newsref/pr/newsrelease558.html
>
>Netscape Navigator standard edition and Netscape Communicator are
>available from the Netscape home page where there are easy instructions
>for downloading at: http://home.netscape.com/download. For a nominal fee,
>CD versions can also be ordered through the download site or by
>calling personal sales at 650-937-3777.
>
>* DISTRIBUTE NETSCAPE SOFTWARE FOR FREE
>In conjunction with todayís free client announcement, Netscape introduced
>a new program for those interested in distributing, bundling or customizing
>Netscape client software. Netscape Everywhere ‚ Unlimited Distribution
>creates new opportunities for third-party web sites, Internet service
>providers,
>independent software vendors, and OEMs. The program is designed to broadly
>distribute Netscape Navigator and Communicator to millions of new users.
>For developers it is a means of providing a choice of client to customers
>as well as a complete web solution.
>
>-Unlimited Distribution
>A simple on-line agreement allows third-parties to download multiple versions,
>including localized versions made generally available by Netscape, of
>Communicator and Navigator. Details about this program will be available
>January 23.
>
>- Unlimited Distribution Custom
>In addition to the standard plan, Netscape plans to allow qualified third
>parties
>a the program will allow qualified third-parties the option to create
>a customized version of the Netscape client so third parties can add
>their logo, add bookmarks, toolbar bookmarks, or change the default
>home page. Unlimited Distribution Custom will provide the guidelines, tools,
>support options and the professional service components necessary for partners
>to create and distribute customized versions of Netscape client software to
>their customers and prospects. For more on Unlimited Distribution see today's
>press release at:
>http://home.netscape.com/newsref/pr/newsrelease560.html
>Also, be sure to check DevEdge Online tomorrow for details about
>participating in the standard program.
>
>* PROMOTIONAL OFFERS FOR NETSCAPE CUSTOMERS
>Recognizing the investment existing customers have made in Netscape
>client software, Netscape is extending several promotional offers to
> individuals and corporate customers on additional products and services.
>Select customers will have an opportunity to purchase at special prices
>Netscapeís high-end software products and subscriptions including:
>Netscape Communicator Professional Edition, Netscape SuiteSpot server
>products or Netscape SuiteSpot Hosting Edition.
>
>For more information see:
>http://home.netscape.com/newsref/pr/newsrelease561.html
>A Frequently Asked Questions (FAQ) has been posted to help answer
>additional questions you may have about Netscapeís announcements at:
>http://home.netscape.com/communicator/free_faq.html

------------------------------

Date: Thu, 22 Jan 1998 19:31:05 -0600
From: egan jones <egan@mail.utexas.edu>
Subject: Re: tech: cache flushing?

>try this:
>
><meta http-equiv="pragma" content="no-cache">
>in the html doc.

More info:

It turns out that this only disables the cacheing (sp?) of the HTML file,
not the images or movies embeded in that page, which is what we need.

>We have not determined exactly where the problem lies. Here is an example:
>
>An html file contains a specific graphic file that resides on the server. The
>image file is replaced on the server with the new version. Netscape continues
>to display the old version despite the client cache being dumped.

This is probably the root of the image cacheing problem that you describe.
The HTML is not cached, but the image is. The user would have to
shift-reload to get the more recent image. (You could also pass the image
through a cgi to attach a http header that contains a no-cache directive to
the image... but this is time/computationally costly)

I thought that Netscape checked all files for the most recent version, but
it may well just check HTML files.

A little something I found in the meanwhile:
for anyone else who's interested... (sound of crickets)

LiveCache
http://search.netscape.com/comprod/products/navigator/version_3.0/ease/cache/ind
ex.html

LiveCache says to try using LiveCache and including the following tag:
<META HTTP-EQUIV="Ext-cache"
CONTENT="name=MyCache;instructions=Instructions to Your User">

I'm not at all sure what is involved in this, just tought I'd post it.

Thanks again, and I hope this helps-
Egan

------------------------------

Date: Fri, 23 Jan 1998 13:39:34 +1000
From: Caleb Fuller <email@calebfuller.com>
Subject: RE: Targetting frames

>and I was wondering if there is a particualr way of targeting the specific
>page without losing my frameset....

The most straightforward way would be to link to a page which sets up the
appropriate frames then loads the targetted page. Basically, duplicate the
frames code from your main index page, but instead of loading the title page,
have it load the logo page.

Caleb Fuller
analog creation | digital media
email@calebfuller.com
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------------------------------

Date: Fri, 23 Jan 1998 09:05:08 +0100
From: =?iso-8859-1?Q?Miguel_Fuentes_Garc=EDa?= <mfuentes@seresco.es>
Subject: Re: Netscape 3.0 Gold -Background Bug?

>Has anyone ever had a problem of Netscape 3.0 not loading backgrounds?

I had the same problem with a client, http://fotografia.las.es/ccasa
and it
was due to the netscape configuration (the "use my default color, not
the page's background").
(Don't try to find background in the actual pages, I dropped it).

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End of babble-digest V1 #156
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