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Prob with HTRequest output stream

From: Colin Hirsch <hirsch-w3lib@mystic.informatik.rwth-aachen.de>
Date: Fri, 25 Aug 2000 15:38:28 +0200
To: www-lib@w3.org
Message-ID: <20000825153828.A26153@informatik.rwth-aachen.de>
Hi There,

a few days ago I started to patch together a download utility a la wget
using libwww, however there is one point where I am having problems.

(If this is not the right forum for such a question please send all
 flames/redirects to my private address to not further bother the list.)

What I want to do as first step is load an html file and write it to
disk and send it through the html parser at the same time. However it
seems that the outputstream in the HTRequest class is not actually
used? My plan was to send the stream from the request through a Tee
object so that one of the streams can go to the parser and the other
copy to disk.

Problem is, I haven't even figured out how to correctly attach an
HTFWriter to the request via HTRequest_setOutputStream, i.e. I never
actually got the file written to disk when isssuing the HTLoad().

(And no, I don't want to use HTLoadToFile() which seems to work, but
 doesn't give as much control over what happens to the data.)

I also tried fiddling around with the converters, but that seems to
be totally independent of the outputstream -- as long as I have
something like
  HTFormat_addConversion("text/html", "www/present", HTMLPresent, 1.0, 0.0, 0.0);
the html parser is called (even thouth I haven't registered any
callbacks there).

Building.... C-T stack from text/html to www/present
StreamStack. Constructing stream stack for text/html to www/present
Building.... Content-Decoding stack
Building.... Transfer-Decoding stack
Host........ passing 286 bytes as consumed to 0x8050e50
Host........ 2617 bytes remaining 
Start <HTML>
Start <HEAD>
Start <TITLE>
End   </TITLE>
End   </HEAD>
Start <BODY>

Trying to guess from the name what it does (am I too stupid to find the
thing explained in the docs?) I also tried the following:

HTFormat_addConversion("image/gif", "www/present", HTSaveConverter, 1.0, 0.0, 0.0);...

which results in a successful load if I give the url of a gif file,
however nothing happens to the data loaded...

I tried to find an answer to this poorly-defined question in the
docs, but haven't found anything enlightning so far... Any help
would be greatly appreciated.

Thanks, Colin

Dipl.-Inform. Colin Hirsch    hirsch@informatik.rwth-aachen.de
Research Group on Mathematical Foundations of Computer Science
University of Technology Aachen                        Germany
Received on Friday, 25 August 2000 09:38:32 UTC

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