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import os
import wheel.install
import wheel.archive
import hashlib
try:
from StringIO import StringIO
except ImportError:
from io import BytesIO as StringIO
import codecs
import zipfile
import pytest
import shutil
import tempfile
from contextlib import contextmanager
@contextmanager
def environ(key, value):
old_value = os.environ.get(key)
try:
os.environ[key] = value
yield
finally:
if old_value is None:
del os.environ[key]
else:
os.environ[key] = old_value
@contextmanager
def temporary_directory():
# tempfile.TemporaryDirectory doesn't exist in Python 2.
tempdir = tempfile.mkdtemp()
try:
yield tempdir
finally:
shutil.rmtree(tempdir)
@contextmanager
def readable_zipfile(path):
# zipfile.ZipFile() isn't a context manager under Python 2.
zf = zipfile.ZipFile(path, 'r')
try:
yield zf
finally:
zf.close()
def test_verifying_zipfile():
if not hasattr(zipfile.ZipExtFile, '_update_crc'):
pytest.skip('No ZIP verification. Missing ZipExtFile._update_crc.')
sio = StringIO()
zf = zipfile.ZipFile(sio, 'w')
zf.writestr("one", b"first file")
zf.writestr("two", b"second file")
zf.writestr("three", b"third file")
zf.close()
# In default mode, VerifyingZipFile checks the hash of any read file
# mentioned with set_expected_hash(). Files not mentioned with
# set_expected_hash() are not checked.
vzf = wheel.install.VerifyingZipFile(sio, 'r')
vzf.set_expected_hash("one", hashlib.sha256(b"first file").digest())
vzf.set_expected_hash("three", "blurble")
vzf.open("one").read()
vzf.open("two").read()
try:
vzf.open("three").read()
except wheel.install.BadWheelFile:
pass
else:
raise Exception("expected exception 'BadWheelFile()'")
# In strict mode, VerifyingZipFile requires every read file to be
# mentioned with set_expected_hash().
vzf.strict = True
try:
vzf.open("two").read()
except wheel.install.BadWheelFile:
pass
else:
raise Exception("expected exception 'BadWheelFile()'")
vzf.set_expected_hash("two", None)
vzf.open("two").read()
def test_pop_zipfile():
sio = StringIO()
zf = wheel.install.VerifyingZipFile(sio, 'w')
zf.writestr("one", b"first file")
zf.writestr("two", b"second file")
zf.close()
try:
zf.pop()
except RuntimeError:
pass # already closed
else:
raise Exception("expected RuntimeError")
zf = wheel.install.VerifyingZipFile(sio, 'a')
zf.pop()
zf.close()
zf = wheel.install.VerifyingZipFile(sio, 'r')
assert len(zf.infolist()) == 1
def test_zipfile_timestamp():
# An environment variable can be used to influence the timestamp on
# TarInfo objects inside the zip. See issue #143. TemporaryDirectory is
# not a context manager under Python 3.
with temporary_directory() as tempdir:
for filename in ('one', 'two', 'three'):
path = os.path.join(tempdir, filename)
with codecs.open(path, 'w', encoding='utf-8') as fp:
fp.write(filename + '\n')
zip_base_name = os.path.join(tempdir, 'dummy')
# The earliest date representable in TarInfos, 1980-01-01
with environ('SOURCE_DATE_EPOCH', '315576060'):
zip_filename = wheel.archive.make_wheelfile_inner(
zip_base_name, tempdir)
with readable_zipfile(zip_filename) as zf:
for info in zf.infolist():
assert info.date_time[:3] == (1980, 1, 1)
def test_zipfile_attributes():
# With the change from ZipFile.write() to .writestr(), we need to manually
# set member attributes.
with temporary_directory() as tempdir:
files = (('foo', 0o644), ('bar', 0o755))
for filename, mode in files:
path = os.path.join(tempdir, filename)
with codecs.open(path, 'w', encoding='utf-8') as fp:
fp.write(filename + '\n')
os.chmod(path, mode)
zip_base_name = os.path.join(tempdir, 'dummy')
zip_filename = wheel.archive.make_wheelfile_inner(
zip_base_name, tempdir)
with readable_zipfile(zip_filename) as zf:
for filename, mode in files:
info = zf.getinfo(os.path.join(tempdir, filename))
assert info.external_attr == (mode | 0o100000) << 16
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