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#14313: zipfile now raises NotImplementedError when the compression type is unknown.

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This commit is contained in:
Ezio Melotti 2012-11-18 13:20:36 +02:00
parent a69be2803b
commit 6a5fc4c443
3 changed files with 42 additions and 0 deletions
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28
Lib/zipfile.py
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@ -461,6 +461,28 @@ class _ZipDecrypter:
self._UpdateKeys(c)
return c
compressor_names = {
0: 'store',
1: 'shrink',
2: 'reduce',
3: 'reduce',
4: 'reduce',
5: 'reduce',
6: 'implode',
7: 'tokenize',
8: 'deflate',
9: 'deflate64',
10: 'implode',
12: 'bzip2',
14: 'lzma',
18: 'terse',
19: 'lz77',
97: 'wavpack',
98: 'ppmd',
}
class ZipExtFile(io.BufferedIOBase):
"""File-like object for reading an archive member.
Is returned by ZipFile.open().
@ -487,6 +509,12 @@ class ZipExtFile(io.BufferedIOBase):
if self._compress_type == ZIP_DEFLATED:
self._decompressor = zlib.decompressobj(-15)
elif self._compress_type != ZIP_STORED:
descr = compressor_names.get(self._compress_type)
if descr:
raise NotImplementedError("compression type %d (%s)" % (self._compress_type, descr))
else:
raise NotImplementedError("compression type %d" % (self._compress_type,))
self._unconsumed = b''
self._readbuffer = b''