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Issue #10233: Close file objects in a timely manner in the tarfile module

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and its test suite.
This commit is contained in:
Antoine Pitrou 2010-10-29 23:49:49 +00:00
parent 749afa95ce
commit e1eca4e3f5
3 changed files with 58 additions and 36 deletions
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16
Lib/tarfile.py
View File

@ -1800,20 +1800,18 @@ class TarFile(object):
except (ImportError, AttributeError):
raise CompressionError("gzip module is not available")
if fileobj is None:
fileobj = bltn_open(name, mode + "b")
extfileobj = False
else:
extfileobj = True
extfileobj = fileobj is not None
try:
t = cls.taropen(name, mode,
gzip.GzipFile(name, mode, compresslevel, fileobj),
**kwargs)
fileobj = gzip.GzipFile(name, mode + "b", compresslevel, fileobj)
t = cls.taropen(name, mode, fileobj, **kwargs)
except IOError:
if not extfileobj:
fileobj.close()
raise ReadError("not a gzip file")
except:
if not extfileobj:
fileobj.close()
raise
t._extfileobj = extfileobj
return t

75
Lib/test/test_tarfile.py
View File

@ -52,25 +52,32 @@ class UstarReadTest(ReadTest):
def test_fileobj_regular_file(self):
tarinfo = self.tar.getmember("ustar/regtype")
fobj = self.tar.extractfile(tarinfo)
data = fobj.read()
self.assertTrue((len(data), md5sum(data)) == (tarinfo.size, md5_regtype),
"regular file extraction failed")
try:
data = fobj.read()
self.assertTrue((len(data), md5sum(data)) == (tarinfo.size, md5_regtype),
"regular file extraction failed")
finally:
fobj.close()
def test_fileobj_readlines(self):
self.tar.extract("ustar/regtype", TEMPDIR)
tarinfo = self.tar.getmember("ustar/regtype")
with open(os.path.join(TEMPDIR, "ustar/regtype"), "r") as fobj1:
lines1 = fobj1.readlines()
fobj2 = io.TextIOWrapper(self.tar.extractfile(tarinfo))
lines2 = fobj2.readlines()
self.assertTrue(lines1 == lines2,
"fileobj.readlines() failed")
self.assertTrue(len(lines2) == 114,
"fileobj.readlines() failed")
self.assertTrue(lines2[83] ==
"I will gladly admit that Python is not the fastest running scripting language.\n",
"fileobj.readlines() failed")
fobj = self.tar.extractfile(tarinfo)
try:
fobj2 = io.TextIOWrapper(fobj)
lines2 = fobj2.readlines()
self.assertTrue(lines1 == lines2,
"fileobj.readlines() failed")
self.assertTrue(len(lines2) == 114,
"fileobj.readlines() failed")
self.assertTrue(lines2[83] ==
"I will gladly admit that Python is not the fastest running scripting language.\n",
"fileobj.readlines() failed")
finally:
fobj.close()
def test_fileobj_iter(self):
self.tar.extract("ustar/regtype", TEMPDIR)
@ -78,9 +85,12 @@ class UstarReadTest(ReadTest):
with open(os.path.join(TEMPDIR, "ustar/regtype"), "rU") as fobj1:
lines1 = fobj1.readlines()
fobj2 = self.tar.extractfile(tarinfo)
lines2 = list(io.TextIOWrapper(fobj2))
self.assertTrue(lines1 == lines2,
"fileobj.__iter__() failed")
try:
lines2 = list(io.TextIOWrapper(fobj2))
self.assertTrue(lines1 == lines2,
"fileobj.__iter__() failed")
finally:
fobj2.close()
def test_fileobj_seek(self):
self.tar.extract("ustar/regtype", TEMPDIR)
@ -138,7 +148,11 @@ class UstarReadTest(ReadTest):
def _test_fileobj_link(self, lnktype, regtype):
a = self.tar.extractfile(lnktype)
b = self.tar.extractfile(regtype)
self.assertEqual(a.name, b.name)
try:
self.assertEqual(a.name, b.name)
finally:
a.close()
b.close()
def test_fileobj_link1(self):
self._test_fileobj_link("ustar/lnktype", "ustar/regtype")
@ -225,8 +239,8 @@ class MiscReadTest(CommonReadTest):
data = fobj.read()
fobj = io.BytesIO(data)
fobj.name = ""
tar = tarfile.open(fileobj=fobj, mode=self.mode)
self.assertEqual(tar.name, None)
with tarfile.open(fileobj=fobj, mode=self.mode) as tar:
self.assertEqual(tar.name, None)
def test_fileobj_with_offset(self):
# Skip the first member and store values from the second member
@ -237,7 +251,9 @@ class MiscReadTest(CommonReadTest):
t = tar.next()
name = t.name
offset = t.offset
data = tar.extractfile(t).read()
f = tar.extractfile(t)
data = f.read()
f.close()
finally:
tar.close()
@ -319,7 +335,8 @@ class MiscReadTest(CommonReadTest):
if e.errno == errno.ENOENT:
self.fail("hardlink not extracted properly")
data = open(os.path.join(TEMPDIR, "ustar/lnktype"), "rb").read()
with open(os.path.join(TEMPDIR, "ustar/lnktype"), "rb") as f:
data = f.read()
self.assertEqual(md5sum(data), md5_regtype)
try:
@ -328,7 +345,8 @@ class MiscReadTest(CommonReadTest):
if e.errno == errno.ENOENT:
self.fail("symlink not extracted properly")
data = open(os.path.join(TEMPDIR, "ustar/symtype"), "rb").read()
with open(os.path.join(TEMPDIR, "ustar/symtype"), "rb") as f:
data = f.read()
self.assertEqual(md5sum(data), md5_regtype)
finally:
tar.close()
@ -604,10 +622,10 @@ class LongnameTest(ReadTest):
# the preceding extended header.
longname = self.subdir + "/" + "123/" * 125 + "longname"
offset = self.tar.getmember(longname).offset
fobj = open(tarname, "rb")
fobj.seek(offset)
tarinfo = tarfile.TarInfo.frombuf(fobj.read(512), "iso8859-1", "strict")
self.assertEqual(tarinfo.type, self.longnametype)
with open(tarname, "rb") as fobj:
fobj.seek(offset)
tarinfo = tarfile.TarInfo.frombuf(fobj.read(512), "iso8859-1", "strict")
self.assertEqual(tarinfo.type, self.longnametype)
class GNUReadTest(LongnameTest):
@ -1353,8 +1371,11 @@ class AppendTest(unittest.TestCase):
t = src.getmember("ustar/regtype")
t.name = "foo"
f = src.extractfile(t)
with tarfile.open(self.tarname, mode) as tar:
tar.addfile(t, f)
try:
with tarfile.open(self.tarname, mode) as tar:
tar.addfile(t, f)
finally:
f.close()
def _test(self, names=["bar"], fileobj=None):
with tarfile.open(self.tarname, fileobj=fileobj) as tar:

3
Misc/NEWS
View File

@ -54,6 +54,9 @@ Core and Builtins
Library
-------
- Issue #10233: Close file objects in a timely manner in the tarfile module
and its test suite.
- Issue #10093: ResourceWarnings are now issued when files and sockets are
deallocated without explicit closing. These warnings are silenced by
default, except in pydebug mode.