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bpo-34097: Add support for zipping files older than 1980-01-01 (GH-8270)

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ZipFile can zip files older than 1980-01-01 and newer than 2107-12-31 using
a new strict_timestamps parameter at the cost of setting the timestamp
to the limit.
This commit is contained in:
Marcel Plch 2018-08-02 15:04:52 +02:00 • committed by Victor Stinner
parent fc512e3e06
commit a2fe1e52eb
4 changed files with 48 additions and 5 deletions
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12
Lib/zipfile.py
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@ -469,7 +469,7 @@ class ZipInfo (object):
extra = extra[ln+4:]
@classmethod
def from_file(cls, filename, arcname=None):
def from_file(cls, filename, arcname=None, *, strict_timestamps=True):
"""Construct an appropriate ZipInfo for a file on the filesystem.
filename should be the path to a file or directory on the filesystem.
@ -484,6 +484,10 @@ class ZipInfo (object):
isdir = stat.S_ISDIR(st.st_mode)
mtime = time.localtime(st.st_mtime)
date_time = mtime[0:6]
if not strict_timestamps and date_time[0] < 1980:
date_time = (1980, 1, 1, 0, 0, 0)
elif not strict_timestamps and date_time[0] > 2107:
date_time = (2107, 12, 31, 23, 59, 59)
# Create ZipInfo instance to store file information
if arcname is None:
arcname = filename
@ -1673,7 +1677,8 @@ class ZipFile:
" would require ZIP64 extensions")
def write(self, filename, arcname=None,
compress_type=None, compresslevel=None):
compress_type=None, compresslevel=None, *,
strict_timestamps=True):
"""Put the bytes from filename into the archive under the name
arcname."""
if not self.fp:
@ -1684,7 +1689,8 @@ class ZipFile:
"Can't write to ZIP archive while an open writing handle exists"
)
zinfo = ZipInfo.from_file(filename, arcname)
zinfo = ZipInfo.from_file(filename, arcname,
strict_timestamps=strict_timestamps)
if zinfo.is_dir():
zinfo.compress_size = 0