author | Vincent Michel <vincent.michel@logilab.fr> |
Mon, 31 Mar 2014 11:18:44 +0000 | |
branch | stable |
changeset 9597 | 8e9db17ce129 |
parent 9167 | c05652b108ce |
child 9467 | ad66d7b3fd48 |
permissions | -rw-r--r-- |
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[rql rewrite] move some code from querier to rqlrewrite where it makes more sense.
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# copyright 2003-2013 LOGILAB S.A. (Paris, FRANCE), all rights reserved. |
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr |
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3 |
# |
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4 |
# This file is part of CubicWeb. |
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5 |
# |
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# CubicWeb is free software: you can redistribute it and/or modify it under the |
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proper licensing information (LGPL-2.1). Hope I get it right this time.
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7 |
# terms of the GNU Lesser General Public License as published by the Free |
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# Software Foundation, either version 2.1 of the License, or (at your option) |
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# any later version. |
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10 |
# |
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# CubicWeb is distributed in the hope that it will be useful, but WITHOUT |
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS |
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more |
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14 |
# details. |
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15 |
# |
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# You should have received a copy of the GNU Lesser General Public License along |
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# with CubicWeb. If not, see <http://www.gnu.org/licenses/>. |
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"""Some utilities for the CubicWeb server.""" |
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0 | 20 |
__docformat__ = "restructuredtext en" |
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import sys |
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fix ticket #1382716 (problem was actually more subtle than I originally thought)
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import logging |
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from threading import Timer, Thread |
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from getpass import getpass |
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from passlib.utils import handlers as uh, to_hash_str |
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from passlib.context import CryptContext |
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from cubicweb.md5crypt import crypt as md5crypt |
0 | 31 |
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32 |
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class CustomMD5Crypt(uh.HasSalt, uh.GenericHandler): |
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name = 'cubicwebmd5crypt' |
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setting_kwds = ('salt',) |
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min_salt_size = 0 |
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max_salt_size = 8 |
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salt_chars = uh.H64_CHARS |
0 | 39 |
|
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@classmethod |
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def from_string(cls, hash): |
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salt, chk = uh.parse_mc2(hash, u'') |
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if chk is None: |
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raise ValueError('missing checksum') |
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return cls(salt=salt, checksum=chk) |
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|
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def to_string(self): |
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return to_hash_str(u'%s$%s' % (self.salt, self.checksum or u'')) |
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# passlib 1.5 wants calc_checksum, 1.6 wants _calc_checksum |
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def calc_checksum(self, secret): |
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return md5crypt(secret, self.salt.encode('ascii')).decode('utf-8') |
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_calc_checksum = calc_checksum |
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_CRYPTO_CTX = CryptContext(['sha512_crypt', CustomMD5Crypt, 'des_crypt', 'ldap_salted_sha1'], |
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deprecated=['cubicwebmd5crypt', 'des_crypt']) |
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verify_and_update = _CRYPTO_CTX.verify_and_update |
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def crypt_password(passwd, salt=None): |
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"""return the encrypted password using the given salt or a generated one |
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""" |
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if salt is None: |
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return _CRYPTO_CTX.encrypt(passwd) |
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# empty hash, accept any password for backwards compat |
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if salt == '': |
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return salt |
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try: |
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if _CRYPTO_CTX.verify(passwd, salt): |
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return salt |
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except ValueError: # e.g. couldn't identify hash |
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pass |
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# wrong password |
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return '' |
0 | 74 |
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def cartesian_product(seqin): |
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"""returns a generator which returns the cartesian product of `seqin` |
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for more details, see : |
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http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/302478 |
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""" |
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def rloop(seqin, comb): |
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"""recursive looping function""" |
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if seqin: # any more sequences to process? |
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for item in seqin[0]: |
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newcomb = comb + [item] # add next item to current combination |
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# call rloop w/ remaining seqs, newcomb |
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for item in rloop(seqin[1:], newcomb): |
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yield item # seqs and newcomb |
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else: # processing last sequence |
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yield comb # comb finished, add to list |
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return rloop(seqin, []) |
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def eschema_eid(session, eschema): |
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"""get eid of the CWEType entity for the given yams type. You should use |
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this because when schema has been loaded from the file-system, not from the |
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database, (e.g. during tests), eschema.eid is not set. |
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""" |
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if eschema.eid is None: |
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eschema.eid = session.execute( |
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'Any X WHERE X is CWEType, X name %(name)s', |
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{'name': str(eschema)})[0][0] |
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103 |
return eschema.eid |
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104 |
|
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0 | 106 |
DEFAULT_MSG = 'we need a manager connection on the repository \ |
107 |
(the server doesn\'t have to run, even should better not)' |
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def manager_userpasswd(user=None, msg=DEFAULT_MSG, confirm=False, |
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110 |
passwdmsg='password'): |
0 | 111 |
if not user: |
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112 |
if msg: |
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113 |
print msg |
0 | 114 |
while not user: |
115 |
user = raw_input('login: ') |
|
116 |
user = unicode(user, sys.stdin.encoding) |
|
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passwd = getpass('%s: ' % passwdmsg) |
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118 |
if confirm: |
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119 |
while True: |
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120 |
passwd2 = getpass('confirm password: ') |
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121 |
if passwd == passwd2: |
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122 |
break |
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123 |
print 'password doesn\'t match' |
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124 |
passwd = getpass('password: ') |
0 | 125 |
# XXX decode password using stdin encoding then encode it using appl'encoding |
126 |
return user, passwd |
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_MARKER=object() |
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def func_name(func): |
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name = getattr(func, '__name__', _MARKER) |
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if name is _MARKER: |
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name = getattr(func, 'func_name', _MARKER) |
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if name is _MARKER: |
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name = repr(func) |
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return name |
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|
0 | 138 |
class LoopTask(object): |
139 |
"""threaded task restarting itself once executed""" |
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def __init__(self, tasks_manager, interval, func, args): |
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if interval < 0: |
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raise ValueError('Loop task interval must be >= 0 ' |
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'(current value: %f for %s)' % \ |
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144 |
(interval, func_name(func))) |
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self._tasks_manager = tasks_manager |
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self.interval = interval |
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def auto_restart_func(self=self, func=func, args=args): |
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restart = True |
0 | 149 |
try: |
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func(*args) |
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except Exception: |
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logger = logging.getLogger('cubicweb.repository') |
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logger.exception('Unhandled exception in LoopTask %s', self.name) |
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raise |
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except BaseException: |
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restart = False |
0 | 157 |
finally: |
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158 |
if restart and tasks_manager.running: |
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159 |
self.start() |
0 | 160 |
self.func = auto_restart_func |
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161 |
self.name = func_name(func) |
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162 |
|
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163 |
def __str__(self): |
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return '%s (%s seconds)' % (self.name, self.interval) |
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165 |
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0 | 166 |
def start(self): |
167 |
self._t = Timer(self.interval, self.func) |
|
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self._t.setName('%s-%s[%d]' % (self._t.getName(), self.name, self.interval)) |
0 | 169 |
self._t.start() |
170 |
||
171 |
def cancel(self): |
|
172 |
self._t.cancel() |
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173 |
||
174 |
def join(self): |
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if self._t.isAlive(): |
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176 |
self._t.join() |
0 | 177 |
|
178 |
||
179 |
class RepoThread(Thread): |
|
180 |
"""subclass of thread so it auto remove itself from a given list once |
|
181 |
executed |
|
182 |
""" |
|
183 |
def __init__(self, target, running_threads): |
|
184 |
def auto_remove_func(self=self, func=target): |
|
185 |
try: |
|
186 |
func() |
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187 |
except Exception: |
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188 |
logger = logging.getLogger('cubicweb.repository') |
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189 |
logger.exception('Unhandled exception in RepoThread %s', self._name) |
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190 |
raise |
0 | 191 |
finally: |
192 |
self.running_threads.remove(self) |
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Thread.__init__(self, target=auto_remove_func) |
0 | 194 |
self.running_threads = running_threads |
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195 |
self._name = func_name(target) |
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196 |
|
0 | 197 |
def start(self): |
198 |
self.running_threads.append(self) |
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self.daemon = True |
0 | 200 |
Thread.start(self) |
201 |
||
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202 |
def getName(self): |
0 | 203 |
return '%s(%s)' % (self._name, Thread.getName(self)) |
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204 |
|
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205 |
class TasksManager(object): |
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206 |
"""Object dedicated manage background task""" |
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207 |
|
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208 |
def __init__(self): |
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209 |
self.running = False |
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210 |
self._tasks = [] |
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211 |
self._looping_tasks = [] |
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212 |
|
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213 |
def add_looping_task(self, interval, func, *args): |
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214 |
"""register a function to be called every `interval` seconds. |
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215 |
|
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216 |
If interval is negative, no looping task is registered. |
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217 |
""" |
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218 |
if interval < 0: |
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219 |
self.debug('looping task %s ignored due to interval %f < 0', |
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220 |
func_name(func), interval) |
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221 |
return |
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222 |
task = LoopTask(self, interval, func, args) |
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223 |
if self.running: |
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224 |
self._start_task(task) |
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225 |
else: |
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226 |
self._tasks.append(task) |
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227 |
|
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228 |
def _start_task(self, task): |
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229 |
self._looping_tasks.append(task) |
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230 |
self.info('starting task %s with interval %.2fs', task.name, |
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231 |
task.interval) |
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232 |
task.start() |
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233 |
|
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234 |
def start(self): |
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235 |
"""Start running looping task""" |
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236 |
assert self.running == False # bw compat purpose maintly |
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237 |
while self._tasks: |
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238 |
task = self._tasks.pop() |
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239 |
self._start_task(task) |
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240 |
self.running = True |
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241 |
|
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242 |
def stop(self): |
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243 |
"""Stop all running task. |
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244 |
|
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245 |
returns when all task have been cancel and none are running anymore""" |
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246 |
if self.running: |
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247 |
while self._looping_tasks: |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
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248 |
looptask = self._looping_tasks.pop() |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
249 |
self.info('canceling task %s...', looptask.name) |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
250 |
looptask.cancel() |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
251 |
looptask.join() |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
252 |
self.info('task %s finished', looptask.name) |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
253 |
|
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
254 |
from logging import getLogger |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
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255 |
from cubicweb import set_log_methods |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
256 |
set_log_methods(TasksManager, getLogger('cubicweb.repository')) |
cd2d332b3063
[repo looping task] move looping task logic in a dedicated object (progress #2204047)
Pierre-Yves David <pierre-yves.david@logilab.fr>
parents:
7823
diff
changeset
|
257 |