Message 141257 - Python tracker

Message141257

Author	chortos
Recipients	chortos
Date	2011-07-27.18:29:20
SpamBayes Score	0.00029609379
Marked as misclassified	No
Message-id	<1311791362.59.0.0211250402323.issue12646@psf.upfronthosting.co.za>
In-reply-to

Content
If a truncated input stream is given to the zlib.decompress function, it raises a zlib.error. However, if the same stream is fed to a zlib.Decompress object, no exception is raised during the entire lifetime of the object. Attached is an example demonstrating the discrepancy. zlib.decompress raises this exception when it gets a Z_BUF_ERROR from zlib, while the implementation of zlib.Decompress.decompress just skips every Z_BUF_ERROR it gets as described in this (apparently inaccurate) comment: /* We will only get Z_BUF_ERROR if the output buffer was full but there wasn't more output when we tried again, so it is not an error condition. */

Content

If a truncated input stream is given to the zlib.decompress function, it raises a zlib.error. However, if the same stream is fed to a zlib.Decompress object, no exception is raised during the entire lifetime of the object. Attached is an example demonstrating the discrepancy.

zlib.decompress raises this exception when it gets a Z_BUF_ERROR from zlib, while the implementation of zlib.Decompress.decompress just skips every Z_BUF_ERROR it gets as described in this (apparently inaccurate) comment:
        /* We will only get Z_BUF_ERROR if the output buffer was full
           but there wasn't more output when we tried again, so it is
           not an error condition.
        */

History
Date	User	Action	Args
2011-07-27 18:29:22	chortos	set	recipients: + chortos
2011-07-27 18:29:22	chortos	set	messageid: <1311791362.59.0.0211250402323.issue12646@psf.upfronthosting.co.za>
2011-07-27 18:29:20	chortos	link	issue12646 messages
2011-07-27 18:29:20	chortos	create