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(unknown charset) Re: zlib issue

From: (unknown charset) Phil Nitschke <Phil.Nitschke@youramigo.com>
Date: 13 Mar 2002 11:51:54 +1030
To: (unknown charset) "Fred Covely" <fcovely@bcftech.com>
Cc: (unknown charset) <www-lib@w3.org>
Message-ID: <lxelip5kjx.fsf@strife.saluka.net>
>>>>> "FC" == Fred Covely <fcovely@bcftech.com> writes:

  FC> Is anyone else have problems with sites that send back gzip
  FC> encoded data?

  FC> For example, if I do a simple HTTP Get on www.google.com accepting
  FC> gzip, I get no output.  I have traced this to htzip.c where the
  FC> call to the zlib function 'inflate' returns -3 (bad gzip format).
  FC> By various manueverings I can force it to accept the google zip
  FC> data, but I have been unable to make it work with 5.3.2.

  FC> FYI here is more detail on the work around.

  FC> The data that comes in from google is in gzip format and contains
  FC> the gzip header.  htzip.c seems to choke on the header piece, so I
  FC> borrowed a piece of code from zlib itself that reads past the
  FC> header before calling 'inflate'.  With that fix in libwww seems to
  FC> work fine.  I feel I am definitely missing something as I can't
  FC> believe others are not retrieving gzip encoded data.

Hi Fred,

Have you read the CERTŪ Advisory CA-2002-07 titled "Double Free Bug in
zlib Compression Library"?
   http://www.cert.org/advisories/CA-2002-07.html

While I'm not suggesting that this is the cause of the problem you're
seeing, it still may be advisable to review which version of zlib you're
using.

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Received on Tuesday, 12 March 2002 20:22:35 GMT

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