lucene/dev-tools/scripts/poll-mirrors.py

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#!/usr/bin/env python3
#
# vim: softtabstop=2 shiftwidth=2 expandtab
#
# Python port of poll-mirrors.pl
#
# This script is designed to poll download sites after posting a release
# and print out notice as each becomes available. The RM can use this
# script to delay the release announcement until the release can be
# downloaded.
#
#
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements. See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to You under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import argparse
import datetime
import ftplib
import re
import sys
import time
from urllib.parse import urlparse
from multiprocessing import Pool
import http.client as http
def p(s):
sys.stdout.write(s)
sys.stdout.flush()
def mirror_contains_file(url):
url = urlparse(url)
if url.scheme == 'http':
return http_file_exists(url)
elif url.scheme == 'ftp':
return ftp_file_exists(url)
def http_file_exists(url):
exists = False
try:
conn = http.HTTPConnection(url.netloc)
conn.request('HEAD', url.path)
response = conn.getresponse()
exists = response.status == 200
except:
pass
return exists
def ftp_file_exists(url):
listing = []
try:
conn = ftplib.FTP(url.netloc)
conn.login()
listing = conn.nlst(url.path)
conn.quit()
except Exception as e:
pass
return len(listing) > 0
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def check_mirror(url):
if mirror_contains_file(url):
p('.')
return None
else:
p('\nFAIL: ' + url + '\n' if args.details else 'X')
return url
desc = 'Periodically checks that all Lucene/Solr mirrors contain either a copy of a release or a specified path'
parser = argparse.ArgumentParser(description=desc)
parser.add_argument('-version', '-v', help='Lucene/Solr version to check')
parser.add_argument('-path', '-p', help='instead of a versioned release, check for some/explicit/path')
parser.add_argument('-interval', '-i', help='seconds to wait before re-querying mirrors', type=int, default=300)
parser.add_argument('-details', '-d', help='print missing mirror URLs', action='store_true', default=False)
parser.add_argument('-once', '-o', help='run only once', action='store_true', default=False)
args = parser.parse_args()
if (args.version is None and args.path is None) \
or (args.version is not None and args.path is not None):
p('You must specify either -version or -path but not both!\n')
sys.exit(1)
try:
conn = http.HTTPConnection('www.apache.org')
conn.request('GET', '/mirrors/')
response = conn.getresponse()
html = response.read()
except Exception as e:
p('Unable to fetch the Apache mirrors list!\n')
sys.exit(1)
mirror_path = args.path if args.path is not None else 'lucene/java/{}/changes/Changes.html'.format(args.version)
maven_url = None if args.version is None else 'http://repo1.maven.org/maven2/' \
'org/apache/lucene/lucene-core/{0}/lucene-core-{0}.pom.asc'.format(args.version)
maven_available = False
pending_mirrors = []
for match in re.finditer('<TR>(.*?)</TR>', str(html), re.MULTILINE | re.IGNORECASE | re.DOTALL):
row = match.group(1)
if not '<TD>ok</TD>' in row:
# skip bad mirrors
continue
match = re.search('<A\s+HREF\s*=\s*"([^"]+)"\s*>', row, re.MULTILINE | re.IGNORECASE)
if match:
pending_mirrors.append(match.group(1) + mirror_path)
total_mirrors = len(pending_mirrors)
label = args.version if args.version is not None else args.path
while True:
p('\n{:%Y-%m-%d %H:%M:%S}'.format(datetime.datetime.now()))
p('\nPolling {} Apache Mirrors'.format(len(pending_mirrors)))
if maven_url is not None and not maven_available:
p(' and Maven Central')
p('...\n')
if maven_url is not None and not maven_available:
maven_available = mirror_contains_file(maven_url)
start = time.time()
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with Pool(processes=5) as pool:
pending_mirrors = list(filter(lambda x: x is not None, pool.map(check_mirror, pending_mirrors)))
stop = time.time()
remaining = args.interval - (stop - start)
available_mirrors = total_mirrors - len(pending_mirrors)
if maven_url is not None:
p('\n\n{} is{}downloadable from Maven Central'.format(label, ' ' if maven_available else ' not '))
p('\n{} is downloadable from {}/{} Apache Mirrors ({:.2f}%)\n'
.format(label, available_mirrors, total_mirrors, available_mirrors * 100 / total_mirrors))
if len(pending_mirrors) == 0 or args.once == True:
break
if remaining > 0:
p('Sleeping for {:d} seconds...\n'.format(int(remaining + 0.5)))
time.sleep(remaining)