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does HTPostAnchor() have problems POSTing large bodies?

From: Steinar Bang <sb@metis.no>
Date: 06 Feb 2001 13:43:07 +0100
To: www-lib@w3.org
Message-ID: <whzog0j82s.fsf@viffer.computas.no>
Platform: linux (glibc2, kernel 2.2.14), gcc (egcs-1.1.2), libwww 5.3.1

Does anyone know if HTPostAnchor() in 5.3.1 have any known problems
with writing large (>=6MB) message bodies?

My application can use both PUT and POST to save its XML files.  In
both cases I stream the XML into an strstream object, and use the
buffer the strstream creates as an argument to HTAnchor_setData() on
the anchor used as an argument to HTPutAnchor() and HTPostAnchor().

The PUT works (to an apache with mod_put).

The POST get stuck in there somewhere.

The body of the POST is a multipart/form-data.  The form seems to work
for uploading small files (ie. the perl CGI script on the other end
seems to parse the form correctly, and save the file which is in one
of the parts).

I have been successful in uploading 6 and 12MB files to this CGI
script, using POST of multipart/form-data, from a small Java
application I've written.

I've also been successful in uploading a 12MB file to this script from
an HTML form in Netscape 4.5 on Win32 (but _not_ from Netscape 4.61 on
linux.  I suspect lack of tolerance for LF instead of CRLF in the
multipart/form-data when parsed by CGI::Lite).

My current theory are that there's either something wrong with the
multipart/form-data I'm building (eg. LF where the MIME parser expects
CRLF, but then, why does uploading small files work?), or that there's
something different in libwww POSTing a buffer from libwww PUTing a
buffer.

The clues are pulling in different directions...:-/

I'll keep digging at this, but any hints and tips are appreciated.

Thanx!


- Steinar
Received on Tuesday, 6 February 2001 07:43:27 GMT

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