def test_malformed_paths(self):
"""
- Path should handle malformed paths.
+ Path should handle malformed paths gracefully.
+
+ Paths with leading slashes are not visible.
+
+ Paths with dots are treated like regular files.
"""
data = io.BytesIO()
zf = zipfile.ZipFile(data, "w")
zf.writestr("../parent.txt", b"content")
zf.filename = ''
root = zipfile.Path(zf)
- assert list(map(str, root.iterdir())) == [
- 'one-slash.txt',
- 'two-slash.txt',
- 'parent.txt',
- ]
+ assert list(map(str, root.iterdir())) == ['../']
+ assert root.joinpath('..').joinpath('parent.txt').read_bytes() == b'content'
+
+ def test_unsupported_names(self):
+ """
+ Path segments with special characters are readable.
+
+ On some platforms or file systems, characters like
+ ``:`` and ``?`` are not allowed, but they are valid
+ in the zip file.
+ """
+ data = io.BytesIO()
+ zf = zipfile.ZipFile(data, "w")
+ zf.writestr("path?", b"content")
+ zf.writestr("V: NMS.flac", b"fLaC...")
+ zf.filename = ''
+ root = zipfile.Path(zf)
+ contents = root.iterdir()
+ assert next(contents).name == 'path?'
+ assert next(contents).name == 'V: NMS.flac'
+ assert root.joinpath('V: NMS.flac').read_bytes() == b"fLaC..."
+
+ def test_backslash_not_separator(self):
+ """
+ In a zip file, backslashes are not separators.
+ """
+ data = io.BytesIO()
+ zf = zipfile.ZipFile(data, "w")
+ zf.writestr(DirtyZipInfo.for_name("foo\\bar", zf), b"content")
+ zf.filename = ''
+ root = zipfile.Path(zf)
+ (first,) = root.iterdir()
+ assert not first.is_dir()
+ assert first.name == 'foo\\bar'
+
+
+class DirtyZipInfo(zipfile.ZipInfo):
+ """
+ Bypass name sanitization.
+ """
+
+ def __init__(self, filename, *args, **kwargs):
+ super().__init__(filename, *args, **kwargs)
+ self.filename = filename
+
+ @classmethod
+ def for_name(cls, name, archive):
+ """
+ Construct the same way that ZipFile.writestr does.
+
+ TODO: extract this functionality and re-use
+ """
+ self = cls(filename=name, date_time=time.localtime(time.time())[:6])
+ self.compress_type = archive.compression
+ self.compress_level = archive.compresslevel
+ if self.filename.endswith('/'): # pragma: no cover
+ self.external_attr = 0o40775 << 16 # drwxrwxr-x
+ self.external_attr |= 0x10 # MS-DOS directory flag
+ else:
+ self.external_attr = 0o600 << 16 # ?rw-------
+ return self
class EncodedMetadataTests(unittest.TestCase):
def _ancestry(path):
"""
Given a path with elements separated by
- posixpath.sep, generate all elements of that path
+ posixpath.sep, generate all elements of that path.
>>> list(_ancestry('b/d'))
['b/d', 'b']
['b']
>>> list(_ancestry(''))
[]
+
+ Multiple separators are treated like a single.
+
+ >>> list(_ancestry('//b//d///f//'))
+ ['//b//d///f', '//b//d', '//b']
"""
path = path.rstrip(posixpath.sep)
- while path and path != posixpath.sep:
+ while path.rstrip(posixpath.sep):
yield path
path, tail = posixpath.split(path)
return itertools.filterfalse(set(subtrahend).__contains__, minuend)
-class SanitizedNames:
- """
- ZipFile mix-in to ensure names are sanitized.
- """
-
- def namelist(self):
- return list(map(self._sanitize, super().namelist()))
-
- @staticmethod
- def _sanitize(name):
- r"""
- Ensure a relative path with posix separators and no dot names.
- Modeled after
- https://github.com/python/cpython/blob/bcc1be39cb1d04ad9fc0bd1b9193d3972835a57c/Lib/zipfile/__init__.py#L1799-L1813
- but provides consistent cross-platform behavior.
- >>> san = SanitizedNames._sanitize
- >>> san('/foo/bar')
- 'foo/bar'
- >>> san('//foo.txt')
- 'foo.txt'
- >>> san('foo/.././bar.txt')
- 'foo/bar.txt'
- >>> san('foo../.bar.txt')
- 'foo../.bar.txt'
- >>> san('\\foo\\bar.txt')
- 'foo/bar.txt'
- >>> san('D:\\foo.txt')
- 'D/foo.txt'
- >>> san('\\\\server\\share\\file.txt')
- 'server/share/file.txt'
- >>> san('\\\\?\\GLOBALROOT\\Volume3')
- '?/GLOBALROOT/Volume3'
- >>> san('\\\\.\\PhysicalDrive1\\root')
- 'PhysicalDrive1/root'
- Retain any trailing slash.
- >>> san('abc/')
- 'abc/'
- Raises a ValueError if the result is empty.
- >>> san('../..')
- Traceback (most recent call last):
- ...
- ValueError: Empty filename
- """
-
- def allowed(part):
- return part and part not in {'..', '.'}
-
- # Remove the drive letter.
- # Don't use ntpath.splitdrive, because that also strips UNC paths
- bare = re.sub('^([A-Z]):', r'\1', name, flags=re.IGNORECASE)
- clean = bare.replace('\\', '/')
- parts = clean.split('/')
- joined = '/'.join(filter(allowed, parts))
- if not joined:
- raise ValueError("Empty filename")
- return joined + '/' * name.endswith('/')
-
-
-class CompleteDirs(SanitizedNames, ZipFile):
+class CompleteDirs(ZipFile):
"""
A ZipFile subclass that ensures that implied directories
are always included in the namelist.
projects / thirdparty / Python / cpython.git / commitdiff
