W3C home > Mailing lists > Public > www-lib@w3.org > October to December 1994

Status Report on Library

From: Henrik Frystyk Nielsen <frystyk@ptsun00.cern.ch>
Date: Sat, 1 Oct 94 15:33:03 +0100
Message-Id: <9410011433.AA28756@ptsun03.cern.ch>
To: www-lib@www0.cern.ch
Hi

As you might have seen we now a official version 2.17 of the Library.
This was necessary in order to keep up with some of the modifications
and new features added to the CERN server.

If/when you look into the code you will not find many of the PC-port
problems solved. This does _not_ mean that I have forgotten about them
- but simply that I can't cope with everything at the same time.

I am now working full-time on the Multi-threaded implementation and I
expect a release a month from now :-)

One of the major problems now is the basic network access mechanism
which has a certain lack of structure :-( I hope to improve this and at
the same time turn the (currently) automatic conversion into HTML to be
a stream converter with a quality factor. I have made a proto
implementation of the news module where it is possible to get `raw'
data out of the library.

Comments???

-- cheers --

Henrik Frystyk
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To: www-talk@www0.cern.ch, www-vrml@wired.com
From: JCMA@ai.mit.edu (John C. Mallery)
Subject: ANNOUNCE: Wide-Area Collaboration and Cooperative Computing
Cc: www-lib@www0.cern.ch, www-html@www0.cern.ch
content-length: 446


The following URL describes a workshop on Wide-Area Collaboration and
Cooperative Computing to take place at the W3 conference
in Chicago on October 19th. The URL points to interactive tools for building
a hypertext of this field.  If you work in this field, we would
appreciate your taking a few minutes to drop into the structure a one-paragraph
description of your area of interest.

http://www.ai.mit.edu/projects/iiip/colab/workshop.html


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From: frystyk@bay.lcs.mit.edu (Henrik Frystyk)
Message-Id: <9410112255.AA01472@bay.lcs.mit.edu>
To: www-lib@www0.cern.ch
Subject: Stange problem on sockets
Reply-To: Henrik Frystyk Nielsen <frystyk@W3.org>
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Hi

I have a strange problem that I don't understand - I hope you can help
me.

After I have the sockets non-blocking in the Library, I have found that
when I connect to a port where I know that I will get `connection
refused', e.g. port 81 or something - this is _not_ what I get. Instead
I get errno 22 - `invalid argument'.

I have now stripped down a test version which is very simple. I do the
following:

	- initialize the sockaddr structure 
	- create a socket with the host
	- make it non-blocking using ioctl	<------
	- do a connect
	- get `would block' back
	- make a select waiting for write on socket
	- on return from select I do a new connect
	- I get errno 22: invalid argument

I have a loop around the connect so that infact I am pending on the
resonse - nothing is touched. If I do exactly the same using blocking
sockets there is no problem - I get the `connection refused' as I would
expect. As soon as I turn the non-blocking sockets on - I get the
`invalid argument'. I have just checked - Mosaic gets the same - but it
doesn't say it to the user as far as I can see.

I have tested it on osf1 and SunOS. Solaris returns `broken pipe' so
this is not much help.

Is it something I have to live with or is there a work-around???

-- cheers --

Henrik
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From: frystyk@ptsun00.cern.ch (Henrik Frystyk Nielsen)
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To: www-lib@www0.cern.ch
Subject: Delay of Library version 3.0
Reply-To: Henrik Frystyk Nielsen <frystyk@www0.cern.ch>
content-length: 242

Dear all

The promissed release of the Library of Common Code version 3.0 will be
temporarily delayed due to administrative questions which must be dealt
with before I can release the code.

Sorry for the inconvenience.

-- cheers --

Henrik
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From: Gordon Dewis <gdewis@hpb.hwc.ca>
To: www-request@www0.cern.ch, www-lib@www0.cern.ch, vlib@www0.cern.ch
Subject: New URL for the Geography section
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The Geography section has changed servers.  The new URL is:
	http://hpb1.hwc.ca:10002/WWW_VL_Geography

The old URL (http://hpb.hwc.ca:7002/WWW_VL_Geography) will continue to 
honour requests until early 1995 to ensure that no one is inconvenienced.

Could you change any references from the old URL to the new URL?

Thanks...

Gordon Dewis
Geography section maintainer

--
  Gordon Dewis   |   "If you ever have a world, plan ahead.  Don't eat it!"
     VE3XGD      |                                  - STTNG
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Date: Sun, 6 Nov 1994 15:15:13 -0500
To: www-lib@www0.cern.ch
From: JCMA@ai.mit.edu (John C. Mallery)
Subject: simple example of how to retrieve raw HTML using libwww
Cc: Henry Minsky <hqm@datawave.net>
content-length: 1582

try this mailing lit, you'll get better results.

Don't tell them you're doing a FAX WWW server!

>Date: Sun, 6 Nov 1994 11:24:51 +0100
>Errors-To: listmaster@www0.cern.ch
>Reply-To: hqm@datawave.net
>Originator: www-talk@info.cern.ch
>Sender: www-talk@www0.cern.ch
>Precedence: bulk
>From: Henry Minsky <hqm@datawave.net>
>To: Multiple recipients of list <www-talk@www0.cern.ch>
>Subject: simple example of how to retrieve raw HTML using libwww
>X-Listprocessor-Version: 6.0c -- ListProcessor by Anastasios Kotsikonas
>
>
>Hello Good People,
>
>Am I the only one who finds the documentation on the CERN libwww
>library less than useful? I am having a great deal of trouble figuring
>out how to do something which should be very simple.
>
>I want to use libwww to compose a request for a URL, and have it fill
>buffer which contains the raw contents of the document (or image or
>whatever). I also want to be able to examine the information returned
>in the response header, about content length, location, etc, which I
>presume will be neatly stored in the HTRequest structure.
>
>Can anyone point me at a simple piece of source code that does what I
>want?  And please don't tell me to look at the CERN LineMode browser;
>I have and it is really quite difficult for me to understand. There
>must be a twenty line program that does what I want already??
>
>Thanks,
>        Henry
>
>

John C. Mallery
Artificial Intelligence Laboratory
Massachusetts Institute of technology
545 Technology Square, NE43-797
Camridge, MA 02139 USA

URL: http://www.ai.mit.edu/people/jcma/jcma.html


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From: frystyk@ptsun00.cern.ch (Henrik Frystyk Nielsen)
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To: www-lib@www0.cern.ch
Subject: Updated documentation on the Library
Reply-To: Henrik Frystyk Nielsen <frystyk@www0.cern.ch>
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Hi

I have now updated most of the information on the Library at

	http://info.cern.ch/hypertext/WWW/Library/Status.html

I hope you will find it useful - comments are welcome!

Lib 3.0 is not far away!

-- cheers --

Henrik
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From: Henry Minsky <hqm@datawave.net>
Message-Id: <199411082142.NAA04788@merlin.datawave.net>
To: www-lib@www0.cern.ch
Subject: code for parsing the dates which are returned in HTTP request responses
content-length: 217


Does anyone have code which can parse the dates returned
in http response headers, such as 

 Date: Tuesday, 08-Nov-94 21:32:52 GMT
 
 Last-Modified: Friday, 02-Sep-94 21:55:51 GMT

into unix style time structures?

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From: John C. Mallery <JCMa@wilson.ai.mit.edu>
Subject: Memory for a sparc 5 to run cern server
To: hallam@alws.cern.ch
Cc: www-lib@www0.cern.ch, panthers@LINCOLN.AI.MIT.EDU
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How much memory should we have to run the cern server on
a sparc 5?

We've got 16meg now, which is clearly not enough.

Would 32 or 48 meg do it?

LLNL has lent us the machine for use during the open meeting.

We will use it to serve images and static text files in support of the smart
server.

We will have at least 3000 people beating on it pretty hard for several weeks
with load concentrated during the working day.
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From: frystyk@ptsun00.cern.ch (Henrik Frystyk Nielsen)
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To: JCMa@wilson.ai.mit.edu, www-lib@www0.cern.ch
Subject: Re: Memory for a sparc 5 to run cern server
Reply-To: Henrik Frystyk Nielsen <frystyk@www0.cern.ch>
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Hi

I am not sure, but I think you will get a better answer if you ask the
question on the

	www-proxy@www0.cern.ch

list. There you will find a lot of people with practical experience
running a server. Take a look at the Mail information at

	http://info.cern.ch/hypertext/WWW/Administration/Mailing/Overview.html

in case you are not subscribed to the proxy list.

-- cheers --

Henrik

> How much memory should we have to run the cern server on
> a sparc 5?
> 
> We've got 16meg now, which is clearly not enough.
> 
> Would 32 or 48 meg do it?
> 
> LLNL has lent us the machine for use during the open meeting.
> 
> We will use it to serve images and static text files in support of the smart
> server.
> 
> We will have at least 3000 people beating on it pretty hard for several weeks
> with load concentrated during the working day.
> 
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From: frystyk@ptsun00.cern.ch (Henrik Frystyk Nielsen)
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To: www-lib@www0.cern.ch
Subject: CERN LIBRARY OF COMMON CODE 3.0pre1 AVAILABLE
Reply-To: Henrik Frystyk Nielsen <frystyk@www0.cern.ch>
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			    *  *  *  *  *

  The CERN Common WWW Library is a general code base that can be used
  as a basis for WWW clients and servers. It contains code for accessing
  HTTP, FTP, Gopher, News, WAIS, Telnet servers, and the local file system. 
  Furthermore it provides modules for parsing, managing and presenting
  hypertext objects to the user and a wide spectra of generic programming
  utilities.

                            *  *  *  *  *

This pre-release is the first version of the CERN Library with support
for non-blocking, interruptible multithreaded I/O. It is to be
considered as a beta release as it contains a significant amount of
modifications compared to the last version (2.17). The CERN Line Mode
Browser is also released in order to show how the multithreaded
functionality can be enabled. The method used in the Line Mode Browser
is not limited to character-based clients but can support GUI clients
as well. The Library is not compatible with the CERN server 3.0 and it
should not be linked with this application. A later release of the
CERN server will support the current Library.

This release is only distributed to WWW developers which are in
contact with CERN. It is not to be considered as an official release,
as modifications and additions will be needed.

The plan is to keep up with these modifications and steadily release
improved versions of the Library continuously until a desired level of
stability is reached.

This release is also the first release of source code which is covered
by the new CERN copyright statement. The statement is published in the
file COPYRIGH - truncated to 8 bytes :-( and is a part of the
distribution file. It can also be read in hypertext format from

        http://info.cern.ch/hypertext/WWW/Conditions/CERNFreeofCharge.html

We encourage everybody to study this statement - questions are welcome!

CERN Common Code Library 3.0pre1 is available as source code from:

        ftp://info.cern.ch/pub/www/src/WWWLibrary_3.0pre1.tar.Z

Its is known to compile on Sun4, Solaris 2, HP Snake, NeXT, NeXT-386,
Decstation Ultrix, DEC OSF/1, SGI and AIX, but look also at the page
of supported platforms at:

        http://info.cern.ch/hypertext/WWW/Library/User/Platform/Platform.html

Diffs and old versions are available at

        ftp://info.cern.ch/pub/www/src/old
        ftp://info.cern.ch/pub/www/src/diffs

The top-node for documentation on the library is available at 

        http://info.cern.ch/hypertext/WWW/Library/Status.html and

Programmer's Guide is available at

        http://info.cern.ch/hypertext/WWW/Library/User/Guide/Guide.html

The documentation has been modified significantly since the last
release. New ideas and comments are welcome!

The address to send email about CERN Library is:

        libwww@info.cern.ch

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

CERN Library 3.0pre1 Release Notes

New or Changed Features:

* Introduced the function HTLibInit() and HTLibTerminate() which MUST
  be called when the application starts up and terminates.

* Introduced the modules HTThread and HTEvent. HTEvent is the
  client interface when using multithreaded functionality and HTThread
  is the internal socket management

* All __STDC__ defines now concentrated to HTUtils.html where it is 
  called _STANDARD_CODE_ so that _cplusplus also handles this

* `new' and `template' not used a names anymore (confuses C++)

* Removed from field in HTRequest structure. This is now handled by
  the functions HTGetMailAddres and HTSetMailAddress and the flag HTEnableFrom
  in the HTTP module.

* Changed HTSetMailAddress so that a call with parameter equals NULL
  or "" clears the contents of the mail-address.

* The number of parameters to Streamstack function is now compatible
  with the arguments to a stream converter, so that we don't loose any
  information while putting up the stream stack.

* HTOutputSource variable is removed. You should use WWW_SOURCE in the
  request structure

* HTGuess stream is a a converter compatible stream so that it
  actually can be setup as a converter

* The stream methods `abort' and `_free' now returns int instead of
  void. On success from these methods `_free' returns 0 and `abort'
  return EOF

* Taken HTEscape and HTUnescape and put them into the HTEscape
  module. The functionality is the same but now they can be used in 
  utility programs without linking in the whole Library

Bug Fixes:

* Removed bug in WAIS module which caused a lot of core dumps

* Removed bug in format classification from URL suffix in HTGoper when
  the file was plaintext
 
* `localhost' is now recognized again after canonicalization in HTLoadFile()

* WAIS SEARCH now produces proper HTML

* Max number of lines in WAIS decreased to 200 as 250 (previous) dumps core

* Bug fixed in HTGetHostName if we must use the getdomainname() function.

* Added some support for SCO

* Handling of gopher items of type ERROR (3) changed so no more core
  dumps in server

Have fun!

--
        Henrik Frystyk Nielsen              H&kon W. Lie
        frystyk@info.cern.ch                howcome@dxcern.cern.ch
        + 41 22 767 8265                    + 41 22 767 8583

        Frederick Roeber                    Phill Hallam-Baker
        roeber@info.cern.ch                 hallam@alws.cern.ch
        + 41 22 767 3755                    + 41 22 767 8072

-------- World-Wide Web Project, CERN, CH-1211 Geneve 23, Switzerland --------

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To: www-lib@www0.cern.ch
Subject: CERN LINE MODE BROWSER 2.0pre1 AVAILABLE
Reply-To: Henrik Frystyk Nielsen <frystyk@www0.cern.ch>
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			    *  *  *  *  *

  The CERN Line Mode Browser is a character based World-Wide Web Browser.
  It is developed for use on dumb terminals and as a test tool for the
  CERN Common Code Library. It can be run in interactive mode, non-
  interactive mode and as a proxy client. Furthermore it gives a variety
  of possibilities for data format conversion, filtering etc. It is
  primarily intended as a test-tool for quick access to the Web or
  used in batch jobs.

			    *  *  *  *  *

This release is only distributed to WWW developers which are in
contact with CERN. It is not to be considered as an official release,
as modifications and additions will be needed.

The plan is to keep up with these modifications and steadily release
improved versions of the Library continuously until a desired level of
stability is reached.

This release is also the first release of source code which is covered
by the new CERN copyright statement. The statement is published in the
file COPYRIGH - truncated to 8 bytes :-( and is a part of the
distribution file. It can also be read in hypertext format from

        http://info.cern.ch/hypertext/WWW/Conditions/CERNFreeofCharge.html

We encourage everybody to study this statement - questions are welcome!

CERN Line Mode Browser 3.0pre1 is available, source code:

	ftp://info.cern.ch/pub/www/src/WWWLineMode_3.0pre1.tar.Z

Its is known to compile on Sun4, Solaris 2, HP Snake, NeXT, NeXT-386,
Decstation Ultrix, DEC OSF/1, SGI and AIX, but look also at the page
of supported platforms at:

        http://info.cern.ch/hypertext/WWW/Library/User/Platform/Platform.html

Documentation is available at 

	http://info.cern.ch/hypertext/WWW/LineMode/Status.html

The addresses to send email about CERN Line Mode Browser are:

        www-bug@info.cern.ch or
        libwww@info.cern.ch

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

CERN Line Mode Browser Release Notes

Most of the code is reorganized in order to adapt the application to
the multithreaded version of the Library. This means that the browser
now has the following new features:

* Interruptable I/O - hit 'z RETURN' and the current load terminates

* You can at any time initiate a new load or any other command by
  simply start typing.

Try it - it is really fun!

--
        Henrik Frystyk Nielsen              H&kon W. Lie
        frystyk@info.cern.ch                howcome@dxcern.cern.ch
        + 41 22 767 8265                    + 41 22 767 8583

        Frederick Roeber                    Phill Hallam-Baker
        roeber@dinfo.cern.ch                hallam@alws.cern.ch
        + 41 22 767 3755                    + 41 22 767 8072

-------- World-Wide Web Project, CERN, CH-1211 Geneve 23, Switzerland --------

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To: frystyk@ptsun00.cern.ch
Cc: www-lib@www0.cern.ch
Subject: Re: CERN LIBRARY OF COMMON CODE 3.0pre1 AVAILABLE 
In-Reply-To: Your message of "Sat, 26 Nov 1994 18:41:25 +0100."
             <9411261741.AA03668@ptsun03.cern.ch> 
Date: Sat, 26 Nov 1994 12:27:50 -0600
From: "Daniel W. Connolly" <connolly@hal.com>
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In message <9411261741.AA03668@ptsun03.cern.ch>, Henrik Frystyk Nielsen writes:
>
>CERN Library 3.0pre1 Release Notes
>
>New or Changed Features:

Lots of good stuff.

As this is a major release, and folks will have to do a bit of re-tooling
anyway, I highly recommend two more changes:

1. Use a more traditional build setup, so folks can just do:

	% zcat www-lib.tar.Z | tar xvf -
	% cd www-lib
	% ./configure
	% make

or use Imake, but I think configure is better.

Prescribing that folks use this WWW/Library/Implementation directory
structure may interfere with integrating the www-lib into other projects.
I know it has interfered with several of mine.

In ftp://prep.ai.mit.edu/pub/gnu/
see autoconf-2.1.tar.gz Nov 4 10:39 (350432 bytes) 


2. Generate the HTML documentation from the C source, rather than
the other way around. I expect that by now you know as well as I
do how many hassles this would alleviate.

I went surfing for a tool to do this and didn't see anything
immediately applicable. But I'm sure a quick perl hack would
do -- or even sed, for maximum portability.

Dan
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From:	DXMINT::"connolly@hal.com"   26-NOV-1994 19:29:41.93

>or use Imake, but I think configure is better.

Funily enough Fred has done the work to get configure going. Theonly reason this 
was not sent out in the distribution is that there were already a lot of 
changes.


>Prescribing that folks use this WWW/Library/Implementation directory
>structure may interfere with integrating the www-lib into other projects.
>I know it has interfered with several of mine.

Putting the different executables for different platforms into separate
directories is absolutely essential. We use AFS to mount the same file structure 
onto all the platforms. 


>2. Generate the HTML documentation from the C source, rather than
>the other way around. I expect that by now you know as well as I
>do how many hassles this would alleviate.

Absolutely.

>I went surfing for a tool to do this and didn't see anything
>immediately applicable. But I'm sure a quick perl hack would
>do -- or even sed, for maximum portability.

Absolutely not. Sed is only portable to UNIX platforms. Sed is never,
never the solution unless the problem is how to waste time. The problem 
with a Perl hack is that no tool that does not completely parse the C
source properly is acceptable. Otherwise I have a set of perfectly good AWK
scripts.


Phill H-B


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To: www-lib@www0.cern.ch
Subject: Re: CERN LIBRARY OF COMMON CODE 3.0pre1 AVAILABLE
Reply-To: Henrik Frystyk Nielsen <frystyk@www0.cern.ch>
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> As this is a major release, and folks will have to do a bit of re-tooling
> anyway, I highly recommend two more changes:
> 
> 1. Use a more traditional build setup, so folks can just do:
> 
> 	% zcat www-lib.tar.Z | tar xvf -
> 	% cd www-lib
> 	% ./configure
> 	% make
> 
> or use Imake, but I think configure is better.

Frederick Roeber has been working on gnu configure for the last weeks
and we are just about to get it into the Library code. It still needs
some testing but it looks promising! The current number of supported
platforms have shown that the BUILD script method doesn't scale.

Suggestions or comments on `how close wwe shall stick to the current
structure and how close we should be to the gnu structure' are
welcome!

> Prescribing that folks use this WWW/Library/Implementation directory
> structure may interfere with integrating the www-lib into other projects.
> I know it has interfered with several of mine.

> 2. Generate the HTML documentation from the C source, rather than
> the other way around. I expect that by now you know as well as I
> do how many hassles this would alleviate.

I would like a better integration between the .html or .h files and the
.c files using hyperlinks. Most of the documentation (including the
.html source files) have been updated, and also the documentation under

	http://info.cern.ch/hypertext/WWW/Library/Status.html

but I still feel that we need some more integration! My idea was to add
the functionality to the LineMode Browser so that it could link
together .h and .c files, but maybe this feature is already available
in other tools?

A PC re-port of the code is also coming up. It is not much of a problem
to get it to compile on a PC, but it is more the problems we have
discussed before regarding malloc() and fprintf(stderr, ""). I suggest
that we change both into a macro having the first be a call-back
function to the application so that it can close down gracefully. It
will take some time before the library is strong enough to handle the
situation better, but turning many of the modules into state machines
does help a lot.

As mentioned in the release note, we intent to keep up the number of
releases so any comments and suggestions to the code are welcome!

-- cheers --

Henrik
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Date: Tue, 6 Dec 1994 02:09-0500
From: "John C. Mallery" <JCMa@wilson.ai.mit.edu>
Subject: Specifying a Proxied URL on the CERN Server
To: www-proxy@www0.cern.ch
Cc: www-lib@www0.cern.ch, mshuster@AI.MIT.EDU, benjamin@AI.MIT.EDU
Message-Id: <19941206070901.1.JCMA@jefferson.ai.mit.edu>
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We need to use the CERN server to provide a proxy service to the world for
another server behind it running database code.

To achieve this, we need to give the world a URL that will reach through the
proxy cache on the cern server to the backend server.

There are two ways to do this that come to mind:

1. Install redirects on the CERN server that reference the backend host via
the proxy.  Simple and elegant BUT I cant' find anything in the latest specs
to indicate that this is possible.

2. Write a script to convert an external reference on the CERN server into a
proxied get on the backend server.


Absolutely ANY workable suggestions on either of these approaches would be
most gratefully appreciated, especially if it arrived by 13:00 GMT.

We need to make this work by 17:00 GMT so that we can proxy cache some search
URLs.
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Date: Wed, 7 Dec 94 00:33:56 +0100
From: frystyk@ptsun00.cern.ch (Henrik Frystyk Nielsen)
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To: frystyk@dxcern.cern.ch, www-lib@www0.cern.ch
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Hi John

You can make the proxy server proxy any request to the backend server. Then you don't
need any redirects and it is much cleaner. This is very easy as a proxy server is set up
as a proxy client jus tlike any other client. See 

   http://info.cern.ch/hypertext/WWW/Daemon/Status.html

I think the exact ULR is something like

  http://info.cern.ch/hypertext/WWW/Daemon/User/Proxies.html

-- cheesr --

Henrik
Received on Saturday, 1 October 1994 14:33:03 GMT

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