How do I use Xmosaic's ISMAP flag with CERN httpd

marcus@x4u.desy.de (Marcus Speh)
Date: 21 Jun 1993 09:03:02 +0000 (GMT)
From: marcus@x4u.desy.de (Marcus Speh)
Subject: How do I use Xmosaic's ISMAP flag with CERN httpd
Sender: VMNETNEW@slacvm.slac.stanford.edu
To: WWW-TALK@nxoc01.cern.ch
Message-id: <MARCUS.93Jun21110302@x4u.desy.de>
Organization: Deutsches Elektronen-Synchrotron, Hamburg, Germany.
X-Envelope-To: WWW-TALK@INFO.CERN.CH
Content-Transfer-Encoding: 7BIT
Xref: unixhub comp.infosystems.www:367 cern.www.talk:14 slac.www.talk:4
Newsgroups: comp.infosystems.www,cern.www.talk,slac.www.talk
Path: slacvm!unixhub!dxcern!dscomsa!dscomsf!marcus
X-Sender: usenet@dscomsa.desy.de (usenet)
    I am currently writing the hypertext doc to a class library
which I want to be fully transparent for the public. Thus, I
prepared an image of the Class Inheritance Tree with neat
boxes. I thought I'd use the ISMAP feature [I have XMosaic v1.1
for SGI-Irix4d]: I followed your demo, i.e. I have a file which
contains
                                                        <xmp>
<A HREF="./decodeMGLIB"><IMG SRC="MGLIB-all.gif" ISMAP>
</A>
                                                        </xmp>
and in the same dir a file
                                                        <xmp>
/decodeMGLIB
                                                        </xmp>
containing
                                                        <xmp>
<A HREF="/decodeMGLIB?90,400">ISU</A>
<A HREF="/decodeMGLIB?180,299">MultiGrid</A>
                                                        </xmp>
Now, only if I accidentally hit the right coordinates,
(90,400) or (180,299), I get the wanted answer, written to files
named
                                                        <xmp>
/decodeMGLIB?90,400
/decodeMGLIB?180,299
                                                        </xmp>

respectively, while for other coordinates, I get the error:
                                                        <XMP>
**** HTAccess: socket or file number returned by obsolete
load routine!  **** HTAccess: Internal software error.
Please mail www-bug@info.cern.ch!
                                                        </XMP>
In his reply, Tony Sanders (sanders@bsdi.com)
who contributed this feature said he did not even know the
CERN httpd supported it. Tony also writes:
                                                        <PRE>
  What Mosaic
  should be passing to the server for your example
  would be:

  GET /decode?xxx,yyy

  It's the job of the server to decode the xxx,yyy
  coords and translate that to some document.

  > these are the upper right corners of subimages

  I would imagine that you have to describe both corners,
  and I'll bet it's the upper-left and lower-right, not
  upper-right but that's just a guess.
                                                        </PRE>
Now, I dont know whether this quote helps, but maybe one or the
other wizard at CERN, or an XMosaic expert knows the answer.
  If that should be necessary: the files I am talking about above are
at at URL http://info.desy.de:80/pub/www/refs/test, or
<A HREF="http://info.desy.de:80/pub/www/refs/test">here</a>
(if you're reading this with WWW)
                                                                <P>
        <A HREF="http://info.desy.de:80/pub/www/people/marcus.html">
marcus                                                  </a>