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+#!/usr/bin/env python3
+
+# Copyright (C) 2012, 2013 Xyne
+#
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public License
+# (version 2) as published by the Free Software Foundation.
+#
+#
+# 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 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+
+import argparse
+import calendar
+import datetime
+import errno
+import getpass
+import http.client
+import json
+import logging
+import os
+import pipes
+import queue
+import re
+import socket
+import subprocess
+import sys
+import tempfile
+import threading
+import time
+import urllib.error
+import urllib.request
+
+
+
+# Generic MirrorStatus Exception
+class MirrorStatusError(Exception):
+ def __init__(self, msg):
+ self.msg = msg
+ def __str__(self):
+ return repr(self.msg)
+
+
+
+def get_cache_file():
+ bname = 'mirrorstatus.json'
+ path = os.getenv('XDG_CACHE_HOME')
+ if path:
+ try:
+ os.makedirs(path, exist_ok=True)
+ # Raised if permissions do not match umask
+ except FileExistsError:
+ pass
+ return os.path.join(path, bname)
+ else:
+ return '/tmp/.{}.{}'.format(getpass.getuser(), bname)
+
+
+
+class MirrorStatus(object):
+ # JSON URI
+ URL = 'https://www.archlinux.org/mirrors/status/json/'
+ # Mirror URL format. Accepts server base URL, repository, and architecture.
+ MIRROR_URL_FORMAT = '{0}{1}/os/{2}'
+ MIRRORLIST_ENTRY_FORMAT = "Server = " + MIRROR_URL_FORMAT + "\n"
+ DISPLAY_TIME_FORMAT = '%Y-%m-%d %H:%M:%S UTC'
+ PARSE_TIME_FORMAT = '%Y-%m-%dT%H:%M:%SZ'
+ # Required for the last_check field, which oddly includes microseconds.
+ PARSE_TIME_FORMAT_WITH_USEC = '%Y-%m-%dT%H:%M:%S.%fZ'
+ # Recognized list sort types and their descriptions.
+ SORT_TYPES = {
+ 'age' : 'last server synchronization',
+ 'rate' : 'download rate',
+ 'country': 'server\'s location',
+ 'score' : 'MirrorStatus score',
+ 'delay' : 'MirrorStatus delay',
+ }
+ # Known repositories, i.e. those that should be on each mirror.
+ # Used to replace the "$repo" variable.
+ # TODO
+ # Avoid using a hard-coded list.
+ # See https://bugs.archlinux.org/task/32895
+ REPOSITORIES = (
+ 'community',
+ 'community-staging',
+ 'community-testing',
+ 'core',
+ 'extra',
+ 'gnome-unstable',
+ 'kde-unstable',
+ 'multilib',
+ 'multilib-testing'
+ 'staging',
+ 'testing'
+ )
+
+ # Known system architectures, as used to replace the "$arch" variable.
+ ARCHITECTURES = ['x86_64']
+
+ # Initialize
+ # refresh_interval:
+ # The cached list will be replaced after this many seconds have passed.
+ # 0 effectively disables caching.
+ # Caching is only useful if the object persists, e.g. if it were embedded
+ # in a server.
+ def __init__(
+ self,
+ refresh_interval=0,
+ verbose=False,
+ connection_timeout=5,
+# download_timeout=None,
+ cache_timeout=300,
+ min_completion_pct=1.,
+ threads=5
+ ):
+ self.refresh_interval = refresh_interval
+
+ # Last modification time of the json object.
+ self.json_mtime = 0
+ # The parsed JSON object.
+ self.json_obj = {}
+ # Display extra information.
+ self.verbose = verbose
+ # Connection timeout
+ self.connection_timeout = connection_timeout
+ # Download timeout
+# self.download_timeout = download_timeout
+ # Cache timeout
+ self.cache_timeout = cache_timeout
+ # Minimum completion percent, for filtering mirrors.
+ self.min_completion_pct = min_completion_pct
+ # Threads
+ self.threads = threads
+
+
+
+ def retrieve(self):
+ """Retrieve the current mirror status JSON data."""
+ self.json_obj = None
+ json_str = None
+ save_json = False
+
+ cache_file = get_cache_file()
+ if self.cache_timeout > 0:
+ save_json = True
+ try:
+ mtime = os.path.getmtime(cache_file)
+ if time.time() - mtime < self.cache_timeout:
+ try:
+ with open(cache_file) as f:
+ self.json_obj = json.load(f)
+ self.json_mtime = mtime
+ save_json = False
+ except IOError as e:
+ raise MirrorStatusError('failed to load cached JSON data ({})'.format(e))
+ except OSError as e:
+ if e.errno != errno.ENOENT:
+ raise MirrorStatusError('failed to get cache file mtime ({})'.format(e))
+
+ if not self.json_obj:
+ try:
+ with urllib.request.urlopen(MirrorStatus.URL, None, self.connection_timeout) as f:
+ json_str = f.read()
+ self.json_obj = json.loads(json_str.decode())
+ self.json_mtime = time.time()
+ except (urllib.error.URLError, socket.timeout) as e:
+ raise MirrorStatusError('failed to retrieve mirror data: ({})'.format(e))
+ except ValueError as e:
+ raise MirrorStatusError('failed to parse retrieved mirror data: ({})'.format(e))
+
+ try:
+ # Remove servers that have not synced, and parse the "last_sync" times for
+ # comparison later.
+ mirrors = self.json_obj['urls']
+ # Filter incomplete mirrors and mirrors that haven't synced.
+ mirrors = list(
+ m for m in mirrors
+ if m['last_sync']
+ and m['completion_pct'] >= self.min_completion_pct
+ )
+ # Parse 'last_sync' times for future comparison.
+ for mirror in mirrors:
+ mirror['last_sync'] = calendar.timegm(
+ time.strptime(mirror['last_sync'],
+ MirrorStatus.PARSE_TIME_FORMAT)
+ )
+ self.json_obj['urls'] = mirrors
+ except KeyError:
+ raise MirrorStatusError('failed to parse retrieved mirror data (the format may have changed or there may be a transient error)')
+
+ if save_json and json_str:
+ try:
+ with open(cache_file, 'wb') as f:
+ f.write(json_str)
+ except IOError as e:
+ raise MirrorStatusError('failed to cache JSON data ({})'.format(e))
+
+
+
+
+
+ def get_obj(self):
+ """Return the JSON object, retrieving new data if necessary."""
+ if not self.json_obj \
+ or time.time() > (self.json_mtime + self.refresh_interval):
+ self.retrieve()
+
+ return self.json_obj
+
+
+ def get_mirrors(self):
+ """Get the mirrors."""
+ return self.get_obj()['urls']
+
+
+
+ def filter(
+ self,
+ mirrors=None,
+ countries=None,
+ regexes=None, # TODO: remove
+ include=None,
+ exclude=None,
+ age=None,
+ protocols=None
+ ):
+ """Filter using different parameters."""
+ # TODO: remove
+ if regexes:
+# raise MirrorStatusError('The "regexes" keyword has been deprecated and replaced by "include" and "exclude".')
+ if not include:
+ include = regexes
+ sys.stderr.write('''WARNING: The "regexes" keyword has been deprecated and replaced by "include" and "exclude".
+ Support will be soon removed without further warning.''')
+ if mirrors is None:
+ mirrors = self.get_mirrors()
+
+ t = time.time()
+ n = 0
+
+ # Make country arguments case-insensitive.
+ uc_countries = tuple(c.upper() for c in countries) if countries else None
+ for mirror in mirrors:
+ # Filter by country.
+ if countries \
+ and not ( \
+ mirror['country'].upper() in uc_countries or \
+ mirror['country_code'].upper() in uc_countries \
+ ):
+ continue
+ # Filter by protocol.
+ if protocols and not mirror['protocol'] in protocols:
+ continue
+ # Filter by regex.
+ # TODO: Find a better way to do this.
+ if include:
+ for regex in include:
+ if re.search(regex, mirror['url']):
+ break
+ else:
+ continue
+ if exclude:
+ discard = False
+ for regex in exclude:
+ if re.search(regex, mirror['url']):
+ discard = True
+ break
+ if discard:
+ continue
+ # Filter by hours since last sync.
+ if age and t > (age * 60**2 + mirror['last_sync']):
+ continue
+
+ # Yield if we're still here.
+ yield mirror
+
+
+
+ def sort(self, mirrors=None, by=None):
+ """Sort using different parameters."""
+ if mirrors is None:
+ mirrors = self.get_mirrors()
+ # Ensure that "mirrors" is a list that can be sorted.
+ if not isinstance(mirrors, list):
+ mirrors = list(mirrors)
+
+ if by == 'age':
+ mirrors.sort(key=lambda m: m['last_sync'], reverse=True)
+ elif by == 'rate':
+ mirrors = self.rate(mirrors)
+ elif by in ('country', 'country_code', 'delay', 'score'):
+ mirrors.sort(key=lambda m: m[by])
+ return mirrors
+
+
+
+ # Sort mirrors by download speed. Download speed will be calculated from the
+ # download time of the [core] database from each server.
+ # TODO: Consider ways to improve this.
+ # TODO: Consider the effects of threading (do the threads affect the results
+ # by competing for bandwidth?)
+ def rate(self, mirrors=None, threads=5):
+ if mirrors is None:
+ mirrors = self.get_mirrors()
+ if not threads:
+ threads = self.threads
+ # Ensure that "mirrors" is a list and not a generator.
+ if not isinstance(mirrors, list):
+ mirrors = list(mirrors)
+
+ # Ensure a sane number of threads.
+ if threads < 1:
+ threads = 1
+ else:
+ threads = min(threads, len(mirrors))
+
+ rates = {}
+
+ # URL input queue.Queue
+ q_in = queue.Queue()
+ # URL and rate output queue.Queue
+ q_out = queue.Queue()
+ def worker():
+ while True:
+ url = q_in.get()
+ db_subpath = 'core/os/x86_64/core.db'
+ db_url = url + db_subpath
+ scheme = urllib.parse.urlparse(url).scheme
+ # Leave the rate as 0 if the connection fails.
+ # TODO: Consider more graceful error handling.
+ rate = 0
+ dt = float('NaN')
+
+ # urllib cannot handle rsync protocol
+ if scheme == 'rsync':
+ rsync_cmd = [
+ 'rsync',
+ '-avL', '--no-h', '--no-motd',
+ '--contimeout={}'.format(self.connection_timeout),
+ db_url
+ ]
+ try:
+ with tempfile.TemporaryDirectory() as tmpdir:
+ t0 = time.time()
+ subprocess.check_call(
+ rsync_cmd + [tmpdir],
+ stdout=subprocess.DEVNULL,
+ stderr=subprocess.DEVNULL
+ )
+ dt = time.time() - t0
+ size = os.path.getsize(os.path.join(
+ tmpdir,
+ os.path.basename(db_subpath)
+ ))
+ rate = size / dt
+ except (subprocess.CalledProcessError, subprocess.TimeoutExpired, FileNotFoundError):
+ pass
+ else:
+ req = urllib.request.Request(url=db_url)
+ try:
+ t0 = time.time()
+ with urllib.request.urlopen(req, None, self.connection_timeout) as f:
+ size = len(f.read())
+ dt = time.time() - t0
+ rate = size / (dt)
+ except (OSError, urllib.error.HTTPError, http.client.HTTPException):
+ pass
+ q_out.put((url, rate, dt))
+ q_in.task_done()
+
+ # Launch threads
+ for i in range(threads):
+ t = threading.Thread(target=worker)
+ t.daemon = True
+ t.start()
+
+
+ # Load the input queue.Queue
+ url_len = max(len(m['url']) for m in mirrors)
+ for mirror in mirrors:
+ logging.info("rating {}".format(mirror['url']))
+ q_in.put(mirror['url'])
+
+ q_in.join()
+
+
+ # Get the results
+ # The "in mirrors" loop is just used to ensure that the right number of
+ # items is retrieved.
+
+ # Display some extra data.
+ header_fmt = '{{:{:d}s}} {{:>14s}} {{:>9s}}'.format(url_len)
+ logging.info(header_fmt.format('Server', 'Rate', 'Time'))
+ fmt = '{{:{:d}s}} {{:8.2f}} KiB/s {{:7.2f}} s'.format(url_len)
+
+ # Loop over the mirrors just to ensure that we get the rate for each mirror.
+ # The value in the loop does not (necessarily) correspond to the mirror.
+ for mirror in mirrors:
+ url, rate, dt = q_out.get()
+ kibps = rate / 1024.0
+ logging.info(fmt.format(url, kibps, dt))
+ rates[url] = rate
+ q_out.task_done()
+
+
+ # Sort by rate.
+ rated_mirrors = [m for m in mirrors if rates[m['url']] > 0]
+ rated_mirrors.sort(key=lambda m: rates[m['url']], reverse=True)
+
+ return rated_mirrors + [m for m in mirrors if rates[m['url']] == 0]
+
+
+
+ def display_time(self, t=None):
+ '''Format a time for display.'''
+ return time.strftime(self.DISPLAY_TIME_FORMAT, t)
+
+
+
+
+ # Return a Pacman-formatted mirrorlist
+ # TODO: Reconsider the assumption that self.json_obj has been retrieved.
+ def get_mirrorlist(self, mirrors=None, include_country=False, cmd=None):
+ if mirrors is None:
+ mirrors = self.get_mirrors()
+ if cmd is None:
+ cmd = '?'
+ else:
+ cmd = 'reflector ' + ' '.join(pipes.quote(x) for x in cmd)
+
+ last_check = self.json_obj['last_check']
+ # For some reason the "last_check" field included microseconds.
+ try:
+ parsed_last_check = datetime.datetime.strptime(
+ last_check,
+ self.PARSE_TIME_FORMAT_WITH_USEC,
+ ).timetuple()
+ except ValueError:
+ parsed_last_check = datetime.datetime.strptime(
+ last_check,
+ self.PARSE_TIME_FORMAT,
+ ).timetuple()
+
+ width = 80
+ colw = 11
+ header = '# Arch Linux mirrorlist generated by Reflector #'.center(width, '#')
+ border = '#' * len(header)
+ mirrorlist = '{}\n{}\n{}\n'.format(border, header, border) + \
+ '\n' + \
+ '\n'.join(
+ '# {{:<{:d}s}} {{}}'.format(colw).format(k, v) for k, v in (
+ ('With:', cmd),
+ ('When:', self.display_time(time.gmtime())),
+ ('From:', MirrorStatus.URL),
+ ('Retrieved:', self.display_time(time.gmtime(self.json_mtime))),
+ ('Last Check:', self.display_time(parsed_last_check)),
+ )
+ ) + \
+ '\n\n'
+
+ country = None
+
+ # mirrors may be a generator so "if mirrors" will not work
+ no_mirrors = True
+ for mirror in mirrors:
+ no_mirrors = False
+ # Include country tags. This is intended for lists that are sorted by
+ # country.
+ if include_country:
+ c = '{} [{}]'.format(mirror['country'], mirror['country_code'])
+ if c != country:
+ if country:
+ mirrorlist += '\n'
+ mirrorlist += '# {}\n'.format(c)
+ country = c
+ mirrorlist += MirrorStatus.MIRRORLIST_ENTRY_FORMAT.format(mirror['url'], '$repo', '$arch')
+
+ if no_mirrors:
+ return None
+ else:
+ return mirrorlist
+
+
+
+ def list_countries(self):
+ countries = dict()
+ for m in self.get_mirrors():
+ k = (m['country'], m['country_code'])
+ try:
+ countries[k] += 1
+ except KeyError:
+ countries[k] = 1
+ return countries
+
+
+
+
+
+
+class ListCountries(argparse.Action):
+ '''
+ Action to list countries along with the number of mirrors in each.
+ '''
+ def __call__(self, parser, namespace, values, option_string=None):
+ ms = MirrorStatus()
+ countries = ms.list_countries()
+ w = max(len(c) for c, cc in countries)
+ n = len(str(max(countries.values())))
+ fmt = '{{:{:d}s}} {{}} {{:{:d}d}}'.format(w, n)
+ for (c, cc), n in sorted(countries.items(), key=lambda x: x[0][0]):
+ print(fmt.format(c, cc, n))
+ sys.exit(0)
+
+
+
+def print_mirror_info(mirrors, time_fmt=MirrorStatus.DISPLAY_TIME_FORMAT):
+ '''
+ Print information about each mirror to STDOUT.
+ '''
+ if mirrors:
+ if not isinstance(mirrors, list):
+ mirrors = list(mirrors)
+ ks = sorted(k for k in mirrors[0].keys() if k != 'url')
+ l = max(len(k) for k in ks)
+ fmt = '{{:{:d}s}} : {{}}'.format(l)
+ for m in mirrors:
+ print('{}$repo/os/$arch'.format(m['url']))
+ for k in ks:
+ v = m[k]
+ if k == 'last_sync':
+ v = time.strftime(time_fmt, time.gmtime(v))
+ print(fmt.format(k, v))
+ print()
+
+
+
+def add_arguments(parser):
+ '''
+ Add reflector arguments to the argument parser.
+ '''
+ parser = argparse.ArgumentParser(description='retrieve and filter a list of the latest Arch Linux mirrors')
+
+ parser.add_argument(
+ '--connection-timeout', type=int, metavar='n', default=5,
+ help='The number of seconds to wait before a connection times out.'
+ )
+
+# parser.add_argument(
+# '--download-timeout', type=int, metavar='n',
+# help='The number of seconds to wait before a download times out. The threshold is checked after each chunk is read, so the actual timeout may take longer.'
+# )
+
+ parser.add_argument(
+ '--list-countries', action=ListCountries, nargs=0,
+ help='Display a table of the distribution of servers by country.'
+ )
+
+ parser.add_argument(
+ '--cache-timeout', type=int, metavar='n', default=300,
+ help='The cache timeout in seconds for the data retrieved from the Arch Linux Mirror Status API. The default is 300 (5 minutes).'
+ )
+
+ parser.add_argument(
+ '--save', metavar='<filepath>',
+ help='Save the mirrorlist to the given path.'
+ )
+
+ sort_help = '; '.join('"{}": {}'.format(k, v) for k, v in MirrorStatus.SORT_TYPES.items())
+ parser.add_argument(
+ '--sort', choices=MirrorStatus.SORT_TYPES,
+ help='Sort the mirrorlist. {}.'.format(sort_help)
+ )
+
+ parser.add_argument(
+ '--threads', type=int, metavar='n',
+ help='The number of threads to use when rating mirrors.'
+ )
+
+ parser.add_argument(
+ '--verbose', action='store_true',
+ help='Print extra information to STDERR. Only works with some options.'
+ )
+
+ parser.add_argument(
+ '--info', action='store_true',
+ help='Print mirror information instead of a mirror list. Filter options apply.'
+ )
+
+
+
+ filters = parser.add_argument_group(
+ 'filters',
+ 'The following filters are inclusive, i.e. the returned list will only contain mirrors for which all of the given conditions are met.'
+ )
+
+ filters.add_argument(
+ '-a', '--age', type=float, metavar='n',
+ help='Only return mirrors that have synchronized in the last n hours. n may be an integer or a decimal number.'
+ )
+
+ filters.add_argument(
+ '-c', '--country', dest='countries', action='append', metavar='<country>',
+ help='Match one of the given countries (case-sensitive). Use "--list-countries" to see which are available.'
+ )
+
+ filters.add_argument(
+ '-f', '--fastest', type=int, metavar='n',
+ help='Return the n fastest mirrors that meet the other criteria. Do not use this option without other filtering options.'
+ )
+
+ filters.add_argument(
+ '-i', '--include', metavar='<regex>', action='append',
+ help='Include servers that match <regex>, where <regex> is a Python regular express.'
+ )
+
+ filters.add_argument(
+ '-x', '--exclude', metavar='<regex>', action='append',
+ help='Exclude servers that match <regex>, where <regex> is a Python regular express.'
+ )
+
+ filters.add_argument(
+ '-l', '--latest', type=int, metavar='n',
+ help='Limit the list to the n most recently synchronized servers.'
+ )
+
+ filters.add_argument(
+ '--score', type=int, metavar='n',
+ help='Limit the list to the n servers with the highest score.'
+ )
+
+ filters.add_argument(
+ '-n', '--number', type=int, metavar='n',
+ help='Return at most n mirrors.'
+ )
+
+ filters.add_argument(
+ '-p', '--protocol', dest='protocols', action='append', metavar='<protocol>',
+ help='Match one of the given protocols, e.g. "http", "ftp".'
+ )
+
+ filters.add_argument(
+ '--completion-percent', type=float, metavar='[0-100]', default=100.,
+ help='Set the minimum completion percent for the returned mirrors. Check the mirrorstatus webpage for the meaning of this parameter. Default value: %(default)s.'
+ )
+
+ return parser
+
+
+
+def parse_args(args=None):
+ '''
+ Parse command-line arguments.
+ '''
+ parser = argparse.ArgumentParser(
+ description='retrieve and filter a list of the latest Arch Linux mirrors'
+ )
+ parser = add_arguments(parser)
+ options = parser.parse_args(args)
+ return options
+
+
+
+# Process options
+def process_options(options, ms=None, mirrors=None):
+ '''
+ Process options.
+
+ Optionally accepts a MirrorStatus object and/or the mirrors as returned by
+ the MirrorStatus.get_mirrors method.
+ '''
+ if not ms:
+ ms = MirrorStatus(
+ verbose=options.verbose,
+ connection_timeout=options.connection_timeout,
+# download_timeout=options.download_timeout,
+ cache_timeout=options.cache_timeout,
+ min_completion_pct=(options.completion_percent/100.),
+ threads=options.threads
+ )
+
+ if mirrors is None:
+ mirrors = ms.get_mirrors()
+
+ # Filter
+ mirrors = ms.filter(
+ mirrors,
+ countries=options.countries,
+ include=options.include,
+ exclude=options.exclude,
+ age=options.age,
+ protocols=options.protocols
+ )
+
+ if options.latest and options.latest > 0:
+ mirrors = ms.sort(mirrors, by='age')
+ mirrors = mirrors[:options.latest]
+
+ if options.score and options.score > 0:
+ mirrors = ms.sort(mirrors, by='score')
+ mirrors = mirrors[:options.score]
+
+ if options.fastest and options.fastest > 0:
+ mirrors = ms.sort(mirrors, by='rate')
+ mirrors = mirrors[:options.fastest]
+
+ if options.sort and not (options.sort == 'rate' and options.fastest):
+ mirrors = ms.sort(mirrors, by=options.sort)
+
+ if options.number:
+ mirrors = list(mirrors)[:options.number]
+
+ return ms, mirrors
+
+
+
+
+
+def main(args=None, configure_logging=False):
+ if args:
+ cmd = tuple(args)
+ else:
+ cmd = sys.argv[1:]
+
+ options = parse_args(args)
+
+ if configure_logging:
+ if options.verbose:
+ level = logging.INFO
+ else:
+ level = logging.WARNING
+ logging.basicConfig(
+ format='[{asctime:s}] {levelname:s}: {message:s}',
+ style='{',
+ datefmt='%Y-%m-%d %H:%M:%S',
+ level=level
+ )
+
+ try:
+ ms, mirrors = process_options(options)
+ if mirrors is not None and not isinstance(mirrors, list):
+ mirrors = list(mirrors)
+ if not mirrors:
+ sys.exit('error: no mirrors found')
+ include_country = options.sort == 'country'
+ # Convert the generator object to a list for re-use later.
+ if options.info:
+ print_mirror_info(mirrors)
+ return
+ else:
+ mirrorlist = ms.get_mirrorlist(mirrors, include_country=include_country, cmd=cmd)
+ if mirrorlist is None:
+ sys.exit('error: no mirrors found')
+ except MirrorStatusError as e:
+ sys.exit('error: {}\n'.format(e.msg))
+
+ if options.save:
+ try:
+ with open(options.save, 'w') as f:
+ f.write(mirrorlist)
+ except IOError as e:
+ sys.exit('error: {}\n'.format(e.strerror))
+ else:
+ print(mirrorlist)
+
+
+
+def run_main(args=None, **kwargs):
+ try:
+ main(args, **kwargs)
+ except KeyboardInterrupt:
+ pass
+
+
+if __name__ == "__main__":
+ run_main(configure_logging=True)
+