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#!/usr/bin/python -t
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Library General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
#
# Copyright 2008 Red Hat
#
# James Antill <james@fedoraproject.org>
# Parse the new MirrorManager metalink output:
import sys
import os
import time
from urlgrabber.progress import format_number
import Errors
from yum.misc import cElementTree_xmlparse as xmlparse
class MetaLinkRepoErrorParseFail(Errors.RepoError):
""" An exception thrown for an unparsable MetaLinkRepoMD file. """
pass
__XML_NS_ML__ = 'http://www.metalinker.org/'
__XML_NS_MM__ = 'http://fedorahosted.org/mirrormanager'
__XML_FMT__ = {'ml' : __XML_NS_ML__,
'mm' : __XML_NS_MM__}
__ML_FILE_ELEMENT__ = """\
{%(ml)s}files/{%(ml)s}file\
""" % __XML_FMT__
__ML_OLD_FILE_ELEMENTS__ = """\
{%(mm)s}alternates/{%(mm)s}alternate\
""" % __XML_FMT__
__ML_RESOURCES__ = """\
{%(ml)s}resources\
""" % __XML_FMT__
class MetaLinkFile:
""" Parse the file metadata out of a metalink file. """
def __init__(self, elem):
# We aren't "using" any of these, just storing them.
chksums = set(["md5", 'sha1', 'sha256', 'sha512'])
for celem in elem:
if False: pass
elif celem.tag == "{%s}timestamp" % __XML_NS_MM__:
self.timestamp = int(celem.text)
elif celem.tag == "{%s}size" % __XML_NS_ML__:
self.size = int(celem.text)
elif celem.tag == "{%s}verification" % __XML_NS_ML__:
self.chksums = {}
for helem in celem:
if (helem.tag == "{%s}hash" % __XML_NS_ML__ and
helem.get("type") in chksums):
self.chksums[helem.get("type").lower()] = helem.text
if not hasattr(self, 'timestamp'):
raise MetaLinkRepoErrorParseFail, "No timestamp for file"
if not hasattr(self, 'size'):
raise MetaLinkRepoErrorParseFail, "No size for file"
if not hasattr(self, 'chksums'):
raise MetaLinkRepoErrorParseFail, "No verifications for file"
def __str__(self):
return """\
Timestamp: %s
Size: %5s (%d)
MD5: %s
SHA1: %s
SHA256: %s
SHA512: %s
""" % (time.ctime(self.timestamp), format_number(self.size), self.size,
self.md5, self.sha1, self.sha256, self.sha512)
def _get_md5(self):
return self.chksums.get('md5', '')
md5 = property(_get_md5)
def _get_sha1(self):
return self.chksums.get('sha1', '')
sha1 = property(_get_sha1)
def _get_sha256(self):
return self.chksums.get('sha256', '')
sha256 = property(_get_sha256)
def _get_sha512(self):
return self.chksums.get('sha512', '')
sha512 = property(_get_sha512)
def __cmp__(self, other):
if other is None:
return 1
ret = cmp(self.timestamp, other.timestamp)
if ret:
return -ret
ret = cmp(self.size, other.size)
if ret:
return ret
ret = cmp(self.md5, other.md5)
if ret:
return ret
ret = cmp(self.sha1, other.sha1)
if ret:
return ret
ret = cmp(self.sha256, other.sha256)
if ret:
return ret
ret = cmp(self.sha512, other.sha512)
if ret:
return ret
return 0
class MetaLinkURL:
""" Parse the URL metadata out of a metalink file. """
def __init__(self, elem, max_connections):
assert elem.tag == '{%s}url' % __XML_NS_ML__
self.max_connections = max_connections
self.url = elem.text
self.preference = int(elem.get("preference", -1))
self.protocol = elem.get("type") # This is the "std" attribute name
self.location = elem.get("location")
self.private = elem.get("{%s}private" % __XML_NS_MM__, "false")
self.private = self.private.lower() == "true"
if self.protocol is None: # Try for the old MM protocol attribute
self.protocol = elem.get("protocol")
def __str__(self):
return """\
URL: %s
Preference: %d
Max-Connections: %d
Protocol: %s
Location: %s
Private: %s
""" % (self.url, self.preference, self.max_connections,
self.protocol, self.location, self.private)
def __cmp__(self, other):
if other is None:
return 1
ret = cmp(self.preference, other.preference)
if ret:
return -ret
ret = cmp(self.protocol == "https", other.protocol == "https")
if ret:
return -ret
ret = cmp(self.protocol == "http", other.protocol == "http")
if ret:
return -ret
return cmp(self.url, other.url)
def usable(self):
if self.protocol is None:
return False
if not self.url:
return False
return True
class MetaLinkRepoMD:
""" Parse a metalink file for repomd.xml. """
def __init__(self, filename):
self.name = None
self.repomd = None
self.old_repomds = []
self.mirrors = []
self._host2mc = {}
if not os.path.exists(filename):
raise MetaLinkRepoErrorParseFail, "File %s does not exist" %filename
try:
root = xmlparse(filename)
except SyntaxError:
raise MetaLinkRepoErrorParseFail, "File %s is not XML" % filename
for elem in root.findall(__ML_FILE_ELEMENT__):
name = elem.get('name')
if os.path.basename(name) != 'repomd.xml':
continue
if self.name is not None and self.name != name:
raise MetaLinkRepoErrorParseFail, "Different paths for repomd file"
self.name = name
repomd = MetaLinkFile(elem)
if self.repomd is not None and self.repomd != repomd:
raise MetaLinkRepoErrorParseFail, "Different data for repomd file"
self.repomd = repomd
for celem in elem.findall(__ML_OLD_FILE_ELEMENTS__):
self.old_repomds.append(MetaLinkFile(celem))
for celem in elem.findall(__ML_RESOURCES__):
max_connections = int(celem.get("maxconnections") or 2)
for uelem in celem:
if uelem.tag == "{%s}url" % __XML_NS_ML__:
self.mirrors.append(MetaLinkURL(uelem, max_connections))
self.old_repomds.sort()
self.mirrors.sort()
if self.repomd is None:
raise MetaLinkRepoErrorParseFail, "No repomd file"
if len(self.mirrors) < 1:
raise MetaLinkRepoErrorParseFail, "No mirror"
def urls(self):
""" Iterate plain urls for the mirrors, like the old mirrorlist. """
# Get the hostname from a url, stripping away any usernames/passwords
# Borrowd from fastestmirror
url2host = lambda url: url.split('/')[2].split('@')[-1]
for mirror in self.mirrors:
url = mirror.url
# This is what yum supports atm. ... no rsync etc.
if url.startswith("file:"):
pass
elif (url.startswith("http:") or url.startswith("ftp:") or
url.startswith("https:")):
host = url2host(url)
if host in self._host2mc:
continue
self._host2mc[host] = mirror
else:
continue
# The mirror urls in the metalink file are for repomd.xml so it
# gives a list of mirrors for that one file, but we want the list
# of mirror baseurls. Joy of reusing other people's stds. :)
if not url.endswith("/repodata/repomd.xml"):
continue
yield url[:-len("/repodata/repomd.xml")]
def __str__(self):
ret = str(self.repomd)
done = False
for orepomd in self.old_repomds:
if not done: ret += "%s\n" % ("-" * 79)
if done: ret += "\n"
done = True
ret += str(orepomd)
done = False
for url in self.mirrors:
if not done: ret += "%s\n" % ("-" * 79)
if done: ret += "\n"
done = True
ret += str(url)
return ret
def main():
""" MetaLinkRepoMD test function. """
def usage():
print >> sys.stderr, "Usage: %s <metalink> ..." % sys.argv[0]
sys.exit(1)
if len(sys.argv) < 2:
usage()
for filename in sys.argv[1:]:
if not os.path.exists(filename):
print "No such file:", filename
continue
print "File:", filename
print MetaLinkRepoMD(filename)
print ''
if __name__ == '__main__':
main()