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Issue #1159051: GzipFile now raises EOFError when reading a corrupted file

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with truncated header or footer.
Added tests for reading truncated gzip, bzip2, and lzma files.
This commit is contained in:
Serhiy Storchaka 2013-01-22 17:07:49 +02:00
commit 57f9b7a124
5 changed files with 82 additions and 44 deletions
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14
Lib/test/test_gzip.py
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@ -389,6 +389,20 @@ class TestGzip(BaseTest):
datac = gzip.compress(data)
self.assertEqual(gzip.decompress(datac), data)
def test_read_truncated(self):
data = data1*50
# Drop the CRC (4 bytes) and file size (4 bytes).
truncated = gzip.compress(data)[:-8]
with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f:
self.assertRaises(EOFError, f.read)
with gzip.GzipFile(fileobj=io.BytesIO(truncated)) as f:
self.assertEqual(f.read(len(data)), data)
self.assertRaises(EOFError, f.read, 1)
# Incomplete 10-byte header.
for i in range(2, 10):
with gzip.GzipFile(fileobj=io.BytesIO(truncated[:i])) as f:
self.assertRaises(EOFError, f.read, 1)
class TestOpen(BaseTest):
def test_binary_modes(self):