Set downloaded file's time stamp from last-modified header

This file stamp setting is very relaxed. If there's any problem
along the way (no last-modified header, bad time string format,
no time set privileges,...) or if nothing is downloaded (e.g. using
resumed download but the file was already complete) then nothing
is done.
This commit is contained in:
Gergely Imreh 2011-01-27 13:02:51 +08:00
parent 9f7963468b
commit 09bd408c28

View File

@ -9,6 +9,7 @@
import cookielib import cookielib
import ctypes import ctypes
import datetime import datetime
import email.utils
import gzip import gzip
import htmlentitydefs import htmlentitydefs
import httplib import httplib
@ -117,6 +118,14 @@ def sanitize_open(filename, open_mode):
stream = open(filename, open_mode) stream = open(filename, open_mode)
return (stream, filename) return (stream, filename)
def timeconvert(timestr):
"""Convert RFC 2822 defined time string into system timestamp"""
timestamp = None
timetuple = email.utils.parsedate_tz(timestr)
if timetuple is not None:
timestamp = email.utils.mktime_tz(timetuple)
return timestamp
class DownloadError(Exception): class DownloadError(Exception):
"""Download Error exception. """Download Error exception.
@ -748,6 +757,15 @@ class FileDownloader(object):
if data_len is not None and byte_counter != data_len: if data_len is not None and byte_counter != data_len:
raise ContentTooShortError(byte_counter, long(data_len)) raise ContentTooShortError(byte_counter, long(data_len))
self.try_rename(tmpfilename, filename) self.try_rename(tmpfilename, filename)
# Update file modification time
timestr = data.info().get('last-modified', None)
if timestr is not None:
filetime = timeconvert(timestr)
if filetime is not None:
try:
os.utime(filename,(time.time(), filetime))
except:
pass
return True return True
class InfoExtractor(object): class InfoExtractor(object):