387 lines
13 KiB
Python
387 lines
13 KiB
Python
|
#!/usr/bin/env python
|
||
|
|
# -*- coding: utf-8 -*-
|
||
|
|
|
||
|
|
"""
|
||
|
|
| This file is part of the web2py Web Framework
|
||
|
|
| Created by Attila Csipa <web2py@csipa.in.rs>
|
||
|
|
| Modified by Massimo Di Pierro <mdipierro@cs.depaul.edu>
|
||
|
|
| License: LGPLv3 (http://www.gnu.org/licenses/lgpl.html)
|
||
|
|
|
||
|
|
Cron-style interface
|
||
|
|
"""
|
||
|
|
|
||
|
|
import sys
|
||
|
|
import os
|
||
|
|
import threading
|
||
|
|
import logging
|
||
|
|
import time
|
||
|
|
import sched
|
||
|
|
import re
|
||
|
|
import datetime
|
||
|
|
import platform
|
||
|
|
from functools import reduce
|
||
|
|
try:
|
||
|
|
import cPickle as pickle
|
||
|
|
except:
|
||
|
|
import pickle
|
||
|
|
from gluon.settings import global_settings
|
||
|
|
from gluon import fileutils
|
||
|
|
from gluon._compat import to_bytes
|
||
|
|
from pydal.contrib import portalocker
|
||
|
|
|
||
|
|
logger = logging.getLogger("web2py.cron")
|
||
|
|
_cron_stopping = False
|
||
|
|
_cron_subprocs = []
|
||
|
|
|
||
|
|
|
||
|
|
def absolute_path_link(path):
|
||
|
|
"""
|
||
|
|
Returns an absolute path for the destination of a symlink
|
||
|
|
|
||
|
|
"""
|
||
|
|
if os.path.islink(path):
|
||
|
|
link = os.readlink(path)
|
||
|
|
if not os.path.isabs(link):
|
||
|
|
link = os.path.join(os.path.dirname(path), link)
|
||
|
|
else:
|
||
|
|
link = os.path.abspath(path)
|
||
|
|
return link
|
||
|
|
|
||
|
|
|
||
|
|
def stopcron():
|
||
|
|
"""Graceful shutdown of cron"""
|
||
|
|
global _cron_stopping
|
||
|
|
_cron_stopping = True
|
||
|
|
while _cron_subprocs:
|
||
|
|
proc = _cron_subprocs.pop()
|
||
|
|
if proc.poll() is None:
|
||
|
|
try:
|
||
|
|
proc.terminate()
|
||
|
|
except:
|
||
|
|
import traceback
|
||
|
|
traceback.print_exc()
|
||
|
|
|
||
|
|
|
||
|
|
class extcron(threading.Thread):
|
||
|
|
|
||
|
|
def __init__(self, applications_parent, apps=None):
|
||
|
|
threading.Thread.__init__(self)
|
||
|
|
self.setDaemon(False)
|
||
|
|
self.path = applications_parent
|
||
|
|
self.apps = apps
|
||
|
|
# crondance(self.path, 'external', startup=True, apps=self.apps)
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
if not _cron_stopping:
|
||
|
|
logger.debug('external cron invocation')
|
||
|
|
crondance(self.path, 'external', startup=False, apps=self.apps)
|
||
|
|
|
||
|
|
|
||
|
|
class hardcron(threading.Thread):
|
||
|
|
|
||
|
|
def __init__(self, applications_parent):
|
||
|
|
threading.Thread.__init__(self)
|
||
|
|
self.setDaemon(True)
|
||
|
|
self.path = applications_parent
|
||
|
|
crondance(self.path, 'hard', startup=True)
|
||
|
|
|
||
|
|
def launch(self):
|
||
|
|
if not _cron_stopping:
|
||
|
|
logger.debug('hard cron invocation')
|
||
|
|
crondance(self.path, 'hard', startup=False)
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
s = sched.scheduler(time.time, time.sleep)
|
||
|
|
logger.info('Hard cron daemon started')
|
||
|
|
while not _cron_stopping:
|
||
|
|
now = time.time()
|
||
|
|
s.enter(60 - now % 60, 1, self.launch, ())
|
||
|
|
s.run()
|
||
|
|
|
||
|
|
|
||
|
|
class softcron(threading.Thread):
|
||
|
|
|
||
|
|
def __init__(self, applications_parent):
|
||
|
|
threading.Thread.__init__(self)
|
||
|
|
self.path = applications_parent
|
||
|
|
# crondance(self.path, 'soft', startup=True)
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
if not _cron_stopping:
|
||
|
|
logger.debug('soft cron invocation')
|
||
|
|
crondance(self.path, 'soft', startup=False)
|
||
|
|
|
||
|
|
|
||
|
|
class Token(object):
|
||
|
|
|
||
|
|
def __init__(self, path):
|
||
|
|
self.path = os.path.join(path, 'cron.master')
|
||
|
|
if not os.path.exists(self.path):
|
||
|
|
fileutils.write_file(self.path, to_bytes(''), 'wb')
|
||
|
|
self.master = None
|
||
|
|
self.now = time.time()
|
||
|
|
|
||
|
|
def acquire(self, startup=False):
|
||
|
|
"""
|
||
|
|
Returns the time when the lock is acquired or
|
||
|
|
None if cron already running
|
||
|
|
|
||
|
|
lock is implemented by writing a pickle (start, stop) in cron.master
|
||
|
|
start is time when cron job starts and stop is time when cron completed
|
||
|
|
stop == 0 if job started but did not yet complete
|
||
|
|
if a cron job started within less than 60 seconds, acquire returns None
|
||
|
|
if a cron job started before 60 seconds and did not stop,
|
||
|
|
a warning is issue "Stale cron.master detected"
|
||
|
|
"""
|
||
|
|
if sys.platform == 'win32':
|
||
|
|
locktime = 59.5
|
||
|
|
else:
|
||
|
|
locktime = 59.99
|
||
|
|
if portalocker.LOCK_EX is None:
|
||
|
|
logger.warning('WEB2PY CRON: Disabled because no file locking')
|
||
|
|
return None
|
||
|
|
self.master = fileutils.open_file(self.path, 'rb+')
|
||
|
|
try:
|
||
|
|
ret = None
|
||
|
|
portalocker.lock(self.master, portalocker.LOCK_EX)
|
||
|
|
try:
|
||
|
|
(start, stop) = pickle.load(self.master)
|
||
|
|
except:
|
||
|
|
(start, stop) = (0, 1)
|
||
|
|
if startup or self.now - start > locktime:
|
||
|
|
ret = self.now
|
||
|
|
if not stop:
|
||
|
|
# this happens if previous cron job longer than 1 minute
|
||
|
|
logger.warning('WEB2PY CRON: Stale cron.master detected')
|
||
|
|
logger.debug('WEB2PY CRON: Acquiring lock')
|
||
|
|
self.master.seek(0)
|
||
|
|
pickle.dump((self.now, 0), self.master)
|
||
|
|
self.master.flush()
|
||
|
|
finally:
|
||
|
|
portalocker.unlock(self.master)
|
||
|
|
if not ret:
|
||
|
|
# do this so no need to release
|
||
|
|
self.master.close()
|
||
|
|
return ret
|
||
|
|
|
||
|
|
def release(self):
|
||
|
|
"""
|
||
|
|
Writes into cron.master the time when cron job was completed
|
||
|
|
"""
|
||
|
|
ret = self.master.closed
|
||
|
|
if not self.master.closed:
|
||
|
|
portalocker.lock(self.master, portalocker.LOCK_EX)
|
||
|
|
logger.debug('WEB2PY CRON: Releasing cron lock')
|
||
|
|
self.master.seek(0)
|
||
|
|
(start, stop) = pickle.load(self.master)
|
||
|
|
if start == self.now: # if this is my lock
|
||
|
|
self.master.seek(0)
|
||
|
|
pickle.dump((self.now, time.time()), self.master)
|
||
|
|
portalocker.unlock(self.master)
|
||
|
|
self.master.close()
|
||
|
|
return ret
|
||
|
|
|
||
|
|
|
||
|
|
def rangetolist(s, period='min'):
|
||
|
|
retval = []
|
||
|
|
if s.startswith('*'):
|
||
|
|
if period == 'min':
|
||
|
|
s = s.replace('*', '0-59', 1)
|
||
|
|
elif period == 'hr':
|
||
|
|
s = s.replace('*', '0-23', 1)
|
||
|
|
elif period == 'dom':
|
||
|
|
s = s.replace('*', '1-31', 1)
|
||
|
|
elif period == 'mon':
|
||
|
|
s = s.replace('*', '1-12', 1)
|
||
|
|
elif period == 'dow':
|
||
|
|
s = s.replace('*', '0-6', 1)
|
||
|
|
m = re.compile(r'(\d+)-(\d+)/(\d+)')
|
||
|
|
match = m.match(s)
|
||
|
|
if match:
|
||
|
|
for i in range(int(match.group(1)), int(match.group(2)) + 1):
|
||
|
|
if i % int(match.group(3)) == 0:
|
||
|
|
retval.append(i)
|
||
|
|
return retval
|
||
|
|
|
||
|
|
|
||
|
|
def parsecronline(line):
|
||
|
|
task = {}
|
||
|
|
if line.startswith('@reboot'):
|
||
|
|
line = line.replace('@reboot', '-1 * * * *')
|
||
|
|
elif line.startswith('@yearly'):
|
||
|
|
line = line.replace('@yearly', '0 0 1 1 *')
|
||
|
|
elif line.startswith('@annually'):
|
||
|
|
line = line.replace('@annually', '0 0 1 1 *')
|
||
|
|
elif line.startswith('@monthly'):
|
||
|
|
line = line.replace('@monthly', '0 0 1 * *')
|
||
|
|
elif line.startswith('@weekly'):
|
||
|
|
line = line.replace('@weekly', '0 0 * * 0')
|
||
|
|
elif line.startswith('@daily'):
|
||
|
|
line = line.replace('@daily', '0 0 * * *')
|
||
|
|
elif line.startswith('@midnight'):
|
||
|
|
line = line.replace('@midnight', '0 0 * * *')
|
||
|
|
elif line.startswith('@hourly'):
|
||
|
|
line = line.replace('@hourly', '0 * * * *')
|
||
|
|
params = line.strip().split(None, 6)
|
||
|
|
if len(params) < 7:
|
||
|
|
return None
|
||
|
|
daysofweek = {'sun': 0, 'mon': 1, 'tue': 2, 'wed': 3,
|
||
|
|
'thu': 4, 'fri': 5, 'sat': 6}
|
||
|
|
for (s, id) in zip(params[:5], ['min', 'hr', 'dom', 'mon', 'dow']):
|
||
|
|
if not s in [None, '*']:
|
||
|
|
task[id] = []
|
||
|
|
vals = s.split(',')
|
||
|
|
for val in vals:
|
||
|
|
if val != '-1' and '-' in val and '/' not in val:
|
||
|
|
val = '%s/1' % val
|
||
|
|
if '/' in val:
|
||
|
|
task[id] += rangetolist(val, id)
|
||
|
|
elif val.isdigit() or val == '-1':
|
||
|
|
task[id].append(int(val))
|
||
|
|
elif id == 'dow' and val[:3].lower() in daysofweek:
|
||
|
|
task[id].append(daysofweek[val[:3].lower()])
|
||
|
|
task['user'] = params[5]
|
||
|
|
task['cmd'] = params[6]
|
||
|
|
return task
|
||
|
|
|
||
|
|
|
||
|
|
class cronlauncher(threading.Thread):
|
||
|
|
|
||
|
|
def __init__(self, cmd, shell=True):
|
||
|
|
threading.Thread.__init__(self)
|
||
|
|
if platform.system() == 'Windows':
|
||
|
|
shell = False
|
||
|
|
self.cmd = cmd
|
||
|
|
self.shell = shell
|
||
|
|
|
||
|
|
def run(self):
|
||
|
|
import subprocess
|
||
|
|
global _cron_subprocs
|
||
|
|
if isinstance(self.cmd, (list, tuple)):
|
||
|
|
cmd = self.cmd
|
||
|
|
else:
|
||
|
|
cmd = self.cmd.split()
|
||
|
|
proc = subprocess.Popen(cmd,
|
||
|
|
stdin=subprocess.PIPE,
|
||
|
|
stdout=subprocess.PIPE,
|
||
|
|
stderr=subprocess.PIPE,
|
||
|
|
shell=self.shell)
|
||
|
|
_cron_subprocs.append(proc)
|
||
|
|
(stdoutdata, stderrdata) = proc.communicate()
|
||
|
|
try:
|
||
|
|
_cron_subprocs.remove(proc)
|
||
|
|
except ValueError:
|
||
|
|
pass
|
||
|
|
if proc.returncode != 0:
|
||
|
|
logger.warning(
|
||
|
|
'WEB2PY CRON Call returned code %s:\n%s' %
|
||
|
|
(proc.returncode, stdoutdata + stderrdata))
|
||
|
|
else:
|
||
|
|
logger.debug('WEB2PY CRON Call returned success:\n%s'
|
||
|
|
% stdoutdata)
|
||
|
|
|
||
|
|
|
||
|
|
def crondance(applications_parent, ctype='soft', startup=False, apps=None):
|
||
|
|
apppath = os.path.join(applications_parent, 'applications')
|
||
|
|
cron_path = os.path.join(applications_parent)
|
||
|
|
token = Token(cron_path)
|
||
|
|
cronmaster = token.acquire(startup=startup)
|
||
|
|
if not cronmaster:
|
||
|
|
return
|
||
|
|
now_s = time.localtime()
|
||
|
|
checks = (('min', now_s.tm_min),
|
||
|
|
('hr', now_s.tm_hour),
|
||
|
|
('mon', now_s.tm_mon),
|
||
|
|
('dom', now_s.tm_mday),
|
||
|
|
('dow', (now_s.tm_wday + 1) % 7))
|
||
|
|
|
||
|
|
if apps is None:
|
||
|
|
apps = [x for x in os.listdir(apppath)
|
||
|
|
if os.path.isdir(os.path.join(apppath, x))]
|
||
|
|
|
||
|
|
full_apath_links = set()
|
||
|
|
|
||
|
|
for app in apps:
|
||
|
|
if _cron_stopping:
|
||
|
|
break
|
||
|
|
apath = os.path.join(apppath, app)
|
||
|
|
|
||
|
|
# if app is a symbolic link to other app, skip it
|
||
|
|
full_apath_link = absolute_path_link(apath)
|
||
|
|
if full_apath_link in full_apath_links:
|
||
|
|
continue
|
||
|
|
else:
|
||
|
|
full_apath_links.add(full_apath_link)
|
||
|
|
|
||
|
|
cronpath = os.path.join(apath, 'cron')
|
||
|
|
crontab = os.path.join(cronpath, 'crontab')
|
||
|
|
if not os.path.exists(crontab):
|
||
|
|
continue
|
||
|
|
try:
|
||
|
|
cronlines = fileutils.readlines_file(crontab, 'rt')
|
||
|
|
lines = [x.strip() for x in cronlines if x.strip(
|
||
|
|
) and not x.strip().startswith('#')]
|
||
|
|
tasks = [parsecronline(cline) for cline in lines]
|
||
|
|
except Exception as e:
|
||
|
|
logger.error('WEB2PY CRON: crontab read error %s' % e)
|
||
|
|
continue
|
||
|
|
|
||
|
|
for task in tasks:
|
||
|
|
if _cron_stopping:
|
||
|
|
break
|
||
|
|
if sys.executable.lower().endswith('pythonservice.exe'):
|
||
|
|
_python_exe = os.path.join(sys.exec_prefix, 'python.exe')
|
||
|
|
else:
|
||
|
|
_python_exe = sys.executable
|
||
|
|
commands = [_python_exe]
|
||
|
|
w2p_path = fileutils.abspath('web2py.py', gluon=True)
|
||
|
|
if os.path.exists(w2p_path):
|
||
|
|
commands.append(w2p_path)
|
||
|
|
if applications_parent != global_settings.gluon_parent:
|
||
|
|
commands.extend(('-f', applications_parent))
|
||
|
|
citems = [(k in task and not v in task[k]) for k, v in checks]
|
||
|
|
task_min = task.get('min', [])
|
||
|
|
if not task:
|
||
|
|
continue
|
||
|
|
elif not startup and task_min == [-1]:
|
||
|
|
continue
|
||
|
|
elif task_min != [-1] and reduce(lambda a, b: a or b, citems):
|
||
|
|
continue
|
||
|
|
logger.info('WEB2PY CRON (%s): %s executing %s in %s at %s'
|
||
|
|
% (ctype, app, task.get('cmd'),
|
||
|
|
os.getcwd(), datetime.datetime.now()))
|
||
|
|
action, command, models = False, task['cmd'], ''
|
||
|
|
if command.startswith('**'):
|
||
|
|
(action, models, command) = (True, '', command[2:])
|
||
|
|
elif command.startswith('*'):
|
||
|
|
(action, models, command) = (True, '-M', command[1:])
|
||
|
|
else:
|
||
|
|
action = False
|
||
|
|
|
||
|
|
if action and command.endswith('.py'):
|
||
|
|
commands.extend(('-J', # cron job
|
||
|
|
models, # import models?
|
||
|
|
'-S', app, # app name
|
||
|
|
'-a', '"<recycle>"', # password
|
||
|
|
'-R', command)) # command
|
||
|
|
elif action:
|
||
|
|
commands.extend(('-J', # cron job
|
||
|
|
models, # import models?
|
||
|
|
'-S', app + '/' + command, # app name
|
||
|
|
'-a', '"<recycle>"')) # password
|
||
|
|
else:
|
||
|
|
commands = command
|
||
|
|
|
||
|
|
# from python docs:
|
||
|
|
# You do not need shell=True to run a batch file or
|
||
|
|
# console-based executable.
|
||
|
|
shell = False
|
||
|
|
|
||
|
|
try:
|
||
|
|
cronlauncher(commands, shell=shell).start()
|
||
|
|
except Exception as e:
|
||
|
|
logger.warning(
|
||
|
|
'WEB2PY CRON: Execution error for %s: %s'
|
||
|
|
% (task.get('cmd'), e))
|
||
|
|
token.release()
|