Add a parsedate() function which emulates rfc822.parsedate(), since python3

doesn't have it. (trunk r14729)

svn path=/main/branches/2.1.7/; revision=14737

1 files changed, 28 insertions, 12 deletions

diff --git a/bin/repoman b/bin/repoman
index f6fb55b31..80e7a97df 100755
--- a/bin/repoman
+++ b/bin/repoman
@@ -32,11 +32,6 @@ try:
 except ImportError:
 	from urllib import urlopen as urllib_request_urlopen
 
-try:
-	from rfc822 import parsedate
-except ImportError:
-	parsedate = None
-
 from io import StringIO
 from itertools import chain
 from stat import S_ISDIR, ST_CTIME
@@ -784,6 +779,33 @@ for x in qacats:
 xmllint_capable = False
 metadata_dtd = os.path.join(repoman_settings["DISTDIR"], 'metadata.dtd')
 
+def parsedate(s):
+	"""Parse a RFC 822 date and time string.
+	This is required for python3 compatibility, since the
+	rfc822.parsedate() function is not available."""
+
+	s_split = []
+	for x in s.upper().split():
+		for y in x.split(','):
+			if y:
+				s_split.append(y)
+
+	if len(s_split) != 6:
+		return None
+
+	# %a, %d %b %Y %H:%M:%S %Z
+	a, d, b, Y, H_M_S, Z = s_split
+
+	# Convert month to integer, since strptime %w is locale-dependent.
+	month_map = {'JAN':1, 'FEB':2, 'MAR':3, 'APR':4, 'MAY':5, 'JUN':6,
+		'JUL':7, 'AUG':8, 'SEP':9, 'OCT':10, 'NOV':11, 'DEC':12}
+	m = month_map.get(b)
+	if m is None:
+		return None
+	m = str(m).rjust(2, '0')
+
+	return time.strptime(':'.join((Y, m, d, H_M_S)), '%Y:%m:%d:%H:%M:%S')
+
 def fetch_metadata_dtd():
 	"""
 	Fetch metadata.dtd if it doesn't exist or the ctime is older than
@@ -816,13 +838,7 @@ def fetch_metadata_dtd():
 			url_f = urllib_request_urlopen(metadata_dtd_uri)
 			msg_info = url_f.info()
 			last_modified = msg_info.get('last-modified')
-			# Date parsing isn't supported in python3 since it has no
-			# equivalent of the rfc822.parsedate() function.
-			# TODO: Convert the last-modified field to locale-independent
-			# format and then use time.strptime() to parse it.
-			if parsedate is None:
-				last_modified = None
-			elif last_modified is not None:
+			if last_modified is not None:
 				last_modified = parsedate(last_modified)
 				if last_modified is not None:
 					last_modified = calendar.timegm(last_modified)