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#!/usr/bin/env python3
import json
import threading
import requests
import time
import logging
import urllib
from subprocess import check_output
def check_status_code(response):
if response.status_code != 200:
raise Exception('Request failed with %i: %s' % (response.status_code,
response.text))
class Updater:
def __init__(self, thread_num, interval, run_once, log_level):
self.thread_num = thread_num
self.run_once = run_once
self.interval = interval
# logging
format = '%(asctime)s - %(name)s - %(levelname)s - %(message)s'
logging.basicConfig(format=format)
self.logger = logging.getLogger('ownCloud News Updater')
if log_level == 'info':
self.logger.setLevel(logging.INFO)
else:
self.logger.setLevel(logging.ERROR)
def run(self):
if self.run_once:
self.logger.info('Running update once with %d threads' %
self.thread_num)
else:
self.logger.info(('Running update in an interval of %d seconds '
'using %d threads') % (self.interval,
self.thread_num))
while True:
self.start_time = time.time() # reset clock
try:
self.before_update()
feeds = self.all_feeds()
threads = []
for num in range(0, self.thread_num):
thread = self.start_update_thread(feeds)
thread.start()
threads.append(thread)
for thread in threads:
thread.join()
self.after_update()
if self.run_once:
return
# wait until the interval finished to run again and subtract
# the update run time from the interval
update_duration_seconds = int((time.time() - self.start_time))
timeout = self.interval - update_duration_seconds
if timeout > 0:
self.logger.info(('Finished updating in %d seconds, '
'next update in %d seconds') %
(update_duration_seconds, timeout))
time.sleep(timeout)
except (Exception) as e:
self.logger.error('%s: Trying again in 30 seconds' % e)
time.sleep(30)
def before_update(self):
raise NotImplementedError
def start_update_thread(self, feeds):
raise NotImplementedError
def all_feeds(self):
raise NotImplementedError
def after_update(self):
raise NotImplementedError
class UpdateThread(threading.Thread):
lock = threading.Lock()
def __init__(self, feeds, logger):
super().__init__()
self.feeds = feeds
self.logger = logger
def run(self):
while True:
with WebUpdateThread.lock:
if len(self.feeds) > 0:
feed = self.feeds.pop()
else:
return
try:
self.logger.info('Updating feed with id %s and user %s' %
(feed['id'], feed['userId']))
self.update_feed(feed)
except (Exception) as e:
self.logger.error(e)
def update_feed(self, feed):
raise NotImplementedError
class WebUpdater(Updater):
def __init__(self, base_url, thread_num, interval, run_once,
user, password, timeout, log_level):
super().__init__(thread_num, interval, run_once, log_level)
self.base_url = base_url
self.auth = (user, password)
self.timeout = timeout
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 before_update(self):
self.logger.info('Calling before update url: %s' % self.before_cleanup_url)
before = requests.get(self.before_cleanup_url, auth=self.auth)
check_status_code(before)
def start_update_thread(self, feeds):
return WebUpdateThread(feeds, self.logger, self.update_url, self.auth,
self.timeout)
def all_feeds(self):
feeds_response = requests.get(self.all_feeds_url, auth=self.auth)
check_status_code(feeds_response)
feeds_json = feeds_response.text
self.logger.info('Received these feeds to update: %s' % feeds_json)
return json.loads(feeds_json)['feeds']
def after_update(self):
self.logger.info('Calling after update url: %s' % self.after_cleanup_url)
after = requests.get(self.after_cleanup_url, auth=self.auth)
check_status_code(after)
class WebUpdateThread(UpdateThread):
def __init__(self, feeds, logger, update_url, auth, timeout):
super().__init__(feeds, logger)
self.update_url = update_url
self.auth = auth
self.timeout = timeout
def update_feed(self, feed):
# rewrite parameters, a feeds id is mapped to feedId
feed['feedId'] = feed['id']
del feed['id']
# turn the pyton dict into url parameters
data = urllib.parse.urlencode(feed)
headers = {
'Accept': 'text/plain'
}
url = '%s?%s' % (self.update_url, data)
request = requests.get(url, auth=self.auth, timeout=self.timeout)
check_status_code(request)
class ConsoleUpdater(Updater):
def __init__(self, directory, thread_num, interval, run_once, log_level):
super().__init__(thread_num, interval, run_once, log_level)
self.directory = directory.rstrip('/')
base_command = ['php', '-f', self.directory + '/occ']
self.before_cleanup_command = base_command + ['news:updater:before-update']
self.all_feeds_command = base_command + ['news:updater:all-feeds']
self.update_feed_command = base_command + ['news:updater:update-feed']
self.after_cleanup_command = base_command + ['news:updater:after-update']
def before_update(self):
self.logger.info('Running before update command %s' %
' '.join(self.before_cleanup_command))
check_output(self.before_cleanup_command)
def start_update_thread(self, feeds):
return ConsoleUpdateThread(feeds, self.logger, self.update_feed_command)
def all_feeds(self):
feeds_json = check_output(self.all_feeds_command).strip()
feeds_json = str(feeds_json, 'utf-8')
self.logger.info('Received these feeds to update: %s' % feeds_json)
return json.loads(feeds_json)['feeds']
def after_update(self):
self.logger.info('Running after update command %s' %
' '.join(self.after_cleanup_command))
check_output(self.before_cleanup_command)
class ConsoleUpdateThread(UpdateThread):
def __init__(self, feeds, logger, update_base_command):
super().__init__(feeds, logger)
self.update_base_command = update_base_command
def update_feed(self, feed):
command = self.update_base_command + [str(feed['id']), feed['userId']]
self.logger.info('Running update command %s' % ' '.join(command))
check_output(command)
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