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#!/usr/bin/env python3
"""
Updater script for the news app which allows multiple feeds to be updated at
once to speed up the update process. Built in cron has to be disabled in the
news config, see the README.rst file in the top directory for more information.
"""
__author__ = 'Bernhard Posselt'
__copyright__ = 'Copyright 2012-2014, Bernhard Posselt'
__license__ = 'AGPL3+'
__maintainer__ = 'Bernhard Posselt'
__email__ = 'dev@bernhard-posselt.com'
import sys
import time
import json
import argparse
import threading
import requests
import urllib
import configparser
def check_status_code(response):
if response.status_code != 200:
raise Exception('Request failed with %i: %s' % (response.status_code,
response.text))
class UpdateThread(threading.Thread):
lock = threading.Lock()
def __init__(self, feeds, update_url, user, password, timeout):
super().__init__()
self.feeds = feeds
self.update_url = update_url
self.user = user
self.password = password
self.timeout = timeout
def run(self):
while True:
with UpdateThread.lock:
if len(self.feeds) > 0:
feed = self.feeds.pop()
else:
return
feed['feedId'] = feed['id']
del feed['id']
# call the update method of one feed
data = urllib.parse.urlencode(feed)
headers = {
'Content-type': 'application/json',
'Accept': 'text/plain'
}
url = '%s?%s' % (self.update_url, data)
try:
auth = (self.user, self.password)
request = requests.get(url, auth=auth, timeout=self.timeout)
check_status_code(request)
except (Exception) as e:
print('%s: %s' % (url, e))
class Updater:
def __init__(self, base_url, thread_num, interval, user, password, timeout,
run_once):
self.thread_num = thread_num
self.interval = interval
self.base_url = base_url
self.user = user
self.password = password
self.timeout = timeout
self.run_once = run_once
if self.base_url[-1] != '/':
self.base_url += '/'
self.base_url += 'index.php/apps/news/api/v1-2'
self.before_cleanup_url = '%s/cleanup/before-update' % self.base_url
self.after_cleanup_url = '%s/cleanup/after-update' % self.base_url
self.all_feeds_url = '%s/feeds/all' % self.base_url
self.update_url = '%s/feeds/update' % self.base_url
def run(self):
while True:
self.start_time = time.time() # reset clock
try:
# run the cleanup request and get all the feeds to update
auth = (self.user, self.password)
before = requests.get(self.before_cleanup_url, auth=auth)
check_status_code(before)
feeds_response = requests.get(self.all_feeds_url, auth=auth)
check_status_code(feeds_response)
feeds_json = feeds_response.text
feeds = json.loads(feeds_json)['feeds']
# start thread_num threads which update the feeds
threads = []
for num in range(0, self.thread_num):
thread = UpdateThread(feeds, self.update_url, self.user,
self.password, self.timeout)
thread.start()
threads.append(thread)
for thread in threads:
thread.join()
after = requests.get(self.after_cleanup_url, auth=auth)
check_status_code(after)
if self.run_once:
return
# wait until the interval finished to run again and subtract
# the update run time from the interval
timeout = self.interval - int((time.time() - self.start_time))
if timeout > 0:
time.sleep(timeout)
except (Exception) as e:
print('%s: %s' % (self.base_url, e))
print('Trying again in 30 seconds')
time.sleep(30)
def main():
parser = argparse.ArgumentParser()
parser.add_argument('--testrun',
help='Run update only once, DO NOT use this in a cron job, only \
recommended for testing', action='store_true')
parser.add_argument('--threads', '-t',
help='How many feeds should be fetched in parallel, defaults to 10',
default=10,
type=int)
parser.add_argument('--timeout', '-s',
help='Maximum number of seconds for updating a feed, \
defaults to 5 minutes',
default=5*60,
type=int)
parser.add_argument('--interval', '-i',
help='Update interval between fetching the next round of \
updates in minutes, defaults to 30 minutes. The update timespan \
will be subtracted from the interval.',
default=30,
type=int)
parser.add_argument('--config', '-c',
help='Path to config file where all parameters except can be defined \
as key values pair. An example is in bin/example_config.ini')
parser.add_argument('--user', '-u',
help='Admin username to log into ownCloud. Must be specified on the \
command line or in the config file.')
parser.add_argument('--password', '-p',
help='Admin password to log into ownCloud')
parser.add_argument('url',
help='The URL where owncloud is installed. Must be specified on the \
command line or in the config file.',
nargs='?')
args = parser.parse_args()
# read config file if given
if args.config:
config = configparser.ConfigParser()
files = config.read(args.config)
if len(files) <= 0:
print('Error: could not find config file %s' % args.config)
exit(1)
config_values = config['updater']
if 'user' in config_values:
args.user = config_values['user']
if 'password' in config_values:
args.password = config_values['password']
if 'testrun' in config_values:
args.testrun = config_values.getboolean('testrun')
if 'threads' in config_values:
args.threads = int(config_values['threads'])
if 'interval' in config_values:
args.interval = int(config_values['interval'])
if 'url' in config_values:
args.url = config_values['url']
# url and user must be specified either from the command line or in the
# config file
if not args.url or not args.user:
parser.print_help()
exit(1)
# create the updater and run the threads
updater = Updater(args.url, args.threads, args.interval, args.user,
args.password, args.timeout, args.testrun)
updater.run()
if __name__ == '__main__':
if sys.version_info < (3, 0):
print('Python 3.0 or higher is required to run this script')
else:
main()
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