[issue6584] gzip module has no custom exception

[Serhiy Storchaka]

Serhiy Storchaka added the comment:

read32() should raise BadGzipFile when less than 4 bytes read. Also you should introduce read8() function which raises BadGzipFile when less than 1 byte read.

See also issue4844 and issue14315 for zipfile.

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stage: commit review -> needs patch

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue6584>
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