author | Sylvain Thénault <sylvain.thenault@logilab.fr> |
Wed, 05 May 2010 18:54:19 +0200 | |
branch | stable |
changeset 5485 | 4a033d7f1d93 |
parent 5424 | 8ecbcbff9777 |
child 5557 | 1a534c596bff |
permissions | -rw-r--r-- |
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# copyright 2003-2010 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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parents:
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6 |
# CubicWeb is free software: you can redistribute it and/or modify it under the |
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7 |
# terms of the GNU Lesser General Public License as published by the Free |
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8 |
# Software Foundation, either version 2.1 of the License, or (at your option) |
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9 |
# 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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# 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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"""Adapter for google appengine source. |
19 |
||
20 |
""" |
|
21 |
__docformat__ = "restructuredtext en" |
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22 |
||
1132 | 23 |
from cubicweb import AuthenticationError, UnknownEid |
0 | 24 |
from cubicweb.server.sources import AbstractSource, ConnectionWrapper |
25 |
from cubicweb.server.pool import SingleOperation |
|
26 |
from cubicweb.server.utils import crypt_password |
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27 |
from cubicweb.goa.dbinit import set_user_groups |
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28 |
from cubicweb.goa.rqlinterpreter import RQLInterpreter |
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29 |
||
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from google.appengine.api.datastore import Key, Entity, Put, Delete |
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from google.appengine.api import datastore_errors, users |
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def _init_groups(guser, euser): |
34 |
# set default groups |
|
35 |
if guser is None: |
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36 |
groups = ['guests'] |
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37 |
else: |
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38 |
groups = ['users'] |
|
39 |
if users.is_current_user_admin(): |
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groups.append('managers') |
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set_user_groups(euser, groups) |
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||
43 |
def _clear_related_cache(session, gaesubject, rtype, gaeobject): |
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subject, object = str(gaesubject.key()), str(gaeobject.key()) |
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for eid, role in ((subject, 'subject'), (object, 'object')): |
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# clear related cache if necessary |
|
47 |
try: |
|
48 |
entity = session.entity_cache(eid) |
|
49 |
except KeyError: |
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pass |
|
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else: |
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52 |
entity.clear_related_cache(rtype, role) |
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if gaesubject.kind() == 'CWUser': |
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for asession in session.repo._sessions.itervalues(): |
55 |
if asession.user.eid == subject: |
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asession.user.clear_related_cache(rtype, 'subject') |
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if gaeobject.kind() == 'CWUser': |
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for asession in session.repo._sessions.itervalues(): |
59 |
if asession.user.eid == object: |
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asession.user.clear_related_cache(rtype, 'object') |
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||
62 |
def _mark_modified(session, gaeentity): |
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modified = session.transaction_data.setdefault('modifiedentities', {}) |
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modified[str(gaeentity.key())] = gaeentity |
65 |
DatastorePutOp(session) |
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66 |
||
67 |
def _rinfo(session, subject, rtype, object): |
|
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gaesubj = session.datastore_get(subject) |
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gaeobj = session.datastore_get(object) |
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rschema = session.vreg.schema.rschema(rtype) |
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cards = rschema.rproperty(gaesubj.kind(), gaeobj.kind(), 'cardinality') |
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return gaesubj, gaeobj, cards |
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||
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def _radd(session, gaeentity, targetkey, relation, card): |
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if card in '?1': |
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gaeentity[relation] = targetkey |
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else: |
|
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try: |
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related = gaeentity[relation] |
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except KeyError: |
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related = [] |
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else: |
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if related is None: |
|
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related = [] |
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related.append(targetkey) |
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gaeentity[relation] = related |
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_mark_modified(session, gaeentity) |
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||
89 |
def _rdel(session, gaeentity, targetkey, relation, card): |
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if card in '?1': |
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gaeentity[relation] = None |
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else: |
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related = gaeentity[relation] |
|
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if related is not None: |
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related = [key for key in related if not key == targetkey] |
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gaeentity[relation] = related or None |
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_mark_modified(session, gaeentity) |
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class DatastorePutOp(SingleOperation): |
101 |
"""delayed put of entities to have less datastore write api calls |
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103 |
* save all modified entities at precommit (should be the first operation |
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processed, hence the 0 returned by insert_index()) |
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0 | 106 |
* in case others precommit operations modify some entities, resave modified |
107 |
entities at commit. This suppose that no db changes will occurs during |
|
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commit event but it should be the case. |
|
109 |
""" |
|
110 |
def insert_index(self): |
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return 0 |
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||
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def _put_entities(self): |
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pending = self.session.transaction_data.get('pendingeids', ()) |
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modified = self.session.transaction_data.get('modifiedentities', {}) |
0 | 116 |
for eid, gaeentity in modified.iteritems(): |
117 |
assert not eid in pending |
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Put(gaeentity) |
|
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modified.clear() |
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def commit_event(self): |
122 |
self._put_entities() |
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0 | 124 |
def precommit_event(self): |
125 |
self._put_entities() |
|
126 |
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127 |
||
128 |
class GAESource(AbstractSource): |
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"""adapter for a system source on top of google appengine datastore""" |
|
130 |
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passwd_rql = "Any P WHERE X is CWUser, X login %(login)s, X upassword P" |
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auth_rql = "Any X WHERE X is CWUser, X login %(login)s, X upassword %(pwd)s" |
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_sols = ({'X': 'CWUser', 'P': 'Password'},) |
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0 | 135 |
options = () |
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0 | 137 |
def __init__(self, repo, appschema, source_config, *args, **kwargs): |
138 |
AbstractSource.__init__(self, repo, appschema, source_config, |
|
139 |
*args, **kwargs) |
|
140 |
if repo.config['use-google-auth']: |
|
141 |
self.info('using google authentication service') |
|
142 |
self.authenticate = self.authenticate_gauth |
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else: |
|
144 |
self.authenticate = self.authenticate_local |
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0 | 146 |
def reset_caches(self): |
147 |
"""method called during test to reset potential source caches""" |
|
148 |
pass |
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0 | 150 |
def init_creating(self): |
151 |
pass |
|
152 |
||
153 |
def init(self): |
|
154 |
# XXX unregister unsupported hooks |
|
155 |
from cubicweb.server.hooks import sync_owner_after_add_composite_relation |
|
156 |
self.repo.hm.unregister_hook(sync_owner_after_add_composite_relation, |
|
157 |
'after_add_relation', '') |
|
158 |
||
159 |
def get_connection(self): |
|
160 |
return ConnectionWrapper() |
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0 | 162 |
# ISource interface ####################################################### |
163 |
||
164 |
def compile_rql(self, rql): |
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rqlst = self.repo.vreg.parse(rql) |
0 | 166 |
rqlst.restricted_vars = () |
167 |
rqlst.children[0].solutions = self._sols |
|
168 |
return rqlst |
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0 | 170 |
def set_schema(self, schema): |
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"""set the instance'schema""" |
0 | 172 |
self.interpreter = RQLInterpreter(schema) |
173 |
self.schema = schema |
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if 'CWUser' in schema and not self.repo.config['use-google-auth']: |
0 | 175 |
# rql syntax trees used to authenticate users |
176 |
self._passwd_rqlst = self.compile_rql(self.passwd_rql) |
|
177 |
self._auth_rqlst = self.compile_rql(self.auth_rql) |
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0 | 179 |
def support_entity(self, etype, write=False): |
180 |
"""return true if the given entity's type is handled by this adapter |
|
181 |
if write is true, return true only if it's a RW support |
|
182 |
""" |
|
183 |
return True |
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0 | 185 |
def support_relation(self, rtype, write=False): |
186 |
"""return true if the given relation's type is handled by this adapter |
|
187 |
if write is true, return true only if it's a RW support |
|
188 |
""" |
|
189 |
return True |
|
190 |
||
191 |
def authenticate_gauth(self, session, login, password): |
|
192 |
guser = users.get_current_user() |
|
193 |
# allowing or not anonymous connection should be done in the app.yaml |
|
194 |
# file, suppose it's authorized if we are there |
|
195 |
if guser is None: |
|
196 |
login = u'anonymous' |
|
197 |
else: |
|
198 |
login = unicode(guser.nickname()) |
|
199 |
# XXX http://code.google.com/appengine/docs/users/userobjects.html |
|
200 |
# use a reference property to automatically work with email address |
|
201 |
# changes after the propagation feature is implemented |
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202 |
key = Key.from_path('CWUser', 'key_' + login, parent=None) |
0 | 203 |
try: |
204 |
euser = session.datastore_get(key) |
|
205 |
# XXX fix user. Required until we find a better way to fix broken records |
|
206 |
if not euser.get('s_in_group'): |
|
207 |
_init_groups(guser, euser) |
|
208 |
Put(euser) |
|
209 |
return str(key) |
|
210 |
except datastore_errors.EntityNotFoundError: |
|
211 |
# create a record for this user |
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212 |
euser = Entity('CWUser', name='key_' + login) |
0 | 213 |
euser['s_login'] = login |
214 |
_init_groups(guser, euser) |
|
215 |
Put(euser) |
|
216 |
return str(euser.key()) |
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|
0 | 218 |
def authenticate_local(self, session, login, password): |
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219 |
"""return CWUser eid for the given login/password if this account is |
0 | 220 |
defined in this source, else raise `AuthenticationError` |
221 |
||
222 |
two queries are needed since passwords are stored crypted, so we have |
|
223 |
to fetch the salt first |
|
224 |
""" |
|
225 |
args = {'login': login, 'pwd' : password} |
|
226 |
if password is not None: |
|
227 |
rset = self.syntax_tree_search(session, self._passwd_rqlst, args) |
|
228 |
try: |
|
229 |
pwd = rset[0][0] |
|
230 |
except IndexError: |
|
231 |
raise AuthenticationError('bad login') |
|
232 |
# passwords are stored using the bytea type, so we get a StringIO |
|
233 |
if pwd is not None: |
|
234 |
args['pwd'] = crypt_password(password, pwd[:2]) |
|
235 |
# get eid from login and (crypted) password |
|
236 |
rset = self.syntax_tree_search(session, self._auth_rqlst, args) |
|
237 |
try: |
|
238 |
return rset[0][0] |
|
239 |
except IndexError: |
|
240 |
raise AuthenticationError('bad password') |
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242 |
def syntax_tree_search(self, session, union, args=None, cachekey=None, |
0 | 243 |
varmap=None): |
244 |
"""return result from this source for a rql query (actually from a rql |
|
245 |
syntax tree and a solution dictionary mapping each used variable to a |
|
246 |
possible type). If cachekey is given, the query necessary to fetch the |
|
247 |
results (but not the results themselves) may be cached using this key. |
|
248 |
""" |
|
249 |
results, description = self.interpreter.interpret(union, args, |
|
250 |
session.datastore_get) |
|
251 |
return results # XXX description |
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|
0 | 253 |
def flying_insert(self, table, session, union, args=None, varmap=None): |
254 |
raise NotImplementedError |
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255 |
|
0 | 256 |
def add_entity(self, session, entity): |
257 |
"""add a new entity to the source""" |
|
258 |
# do not delay add_entity as other modifications, new created entity |
|
259 |
# needs an eid |
|
260 |
entity.put() |
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parents:
1398
diff
changeset
|
261 |
|
0 | 262 |
def update_entity(self, session, entity): |
263 |
"""replace an entity in the source""" |
|
264 |
gaeentity = entity.to_gae_model() |
|
265 |
_mark_modified(session, entity.to_gae_model()) |
|
1398
5fe84a5f7035
rename internal entity types to have CW prefix instead of E
sylvain.thenault@logilab.fr
parents:
1132
diff
changeset
|
266 |
if gaeentity.kind() == 'CWUser': |
0 | 267 |
for asession in self.repo._sessions.itervalues(): |
268 |
if asession.user.eid == entity.eid: |
|
269 |
asession.user.update(dict(gaeentity)) |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
|
270 |
|
4913
083b4d454192
server/web api for accessing to deleted_entites
Katia Saurfelt <katia.saurfelt@logilab.fr>
parents:
4212
diff
changeset
|
271 |
def delete_entity(self, session, entity): |
0 | 272 |
"""delete an entity from the source""" |
273 |
# do not delay delete_entity as other modifications to ensure |
|
274 |
# consistency |
|
4913
083b4d454192
server/web api for accessing to deleted_entites
Katia Saurfelt <katia.saurfelt@logilab.fr>
parents:
4212
diff
changeset
|
275 |
eid = entity.eid |
0 | 276 |
key = Key(eid) |
277 |
Delete(key) |
|
278 |
session.clear_datastore_cache(key) |
|
279 |
session.drop_entity_cache(eid) |
|
2102
268659907769
finish to update transaction data api
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
1977
diff
changeset
|
280 |
session.transaction_data.get('modifiedentities', {}).pop(eid, None) |
0 | 281 |
|
282 |
def add_relation(self, session, subject, rtype, object): |
|
283 |
"""add a relation to the source""" |
|
284 |
gaesubj, gaeobj, cards = _rinfo(session, subject, rtype, object) |
|
285 |
_radd(session, gaesubj, gaeobj.key(), 's_' + rtype, cards[0]) |
|
286 |
_radd(session, gaeobj, gaesubj.key(), 'o_' + rtype, cards[1]) |
|
287 |
_clear_related_cache(session, gaesubj, rtype, gaeobj) |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
|
288 |
|
0 | 289 |
def delete_relation(self, session, subject, rtype, object): |
290 |
"""delete a relation from the source""" |
|
291 |
gaesubj, gaeobj, cards = _rinfo(session, subject, rtype, object) |
|
2102
268659907769
finish to update transaction data api
Sylvain Thénault <sylvain.thenault@logilab.fr>
parents:
1977
diff
changeset
|
292 |
pending = session.transaction_data.setdefault('pendingeids', set()) |
0 | 293 |
if not subject in pending: |
294 |
_rdel(session, gaesubj, gaeobj.key(), 's_' + rtype, cards[0]) |
|
295 |
if not object in pending: |
|
296 |
_rdel(session, gaeobj, gaesubj.key(), 'o_' + rtype, cards[1]) |
|
297 |
_clear_related_cache(session, gaesubj, rtype, gaeobj) |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
|
298 |
|
0 | 299 |
# system source interface ################################################# |
300 |
||
301 |
def eid_type_source(self, session, eid): |
|
302 |
"""return a tuple (type, source, extid) for the entity with id <eid>""" |
|
303 |
try: |
|
304 |
key = Key(eid) |
|
305 |
except datastore_errors.BadKeyError: |
|
306 |
raise UnknownEid(eid) |
|
307 |
return key.kind(), 'system', None |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
|
308 |
|
0 | 309 |
def create_eid(self, session): |
310 |
return None # let the datastore generating key |
|
311 |
||
312 |
def add_info(self, session, entity, source, extid=None): |
|
313 |
"""add type and source info for an eid into the system table""" |
|
314 |
pass |
|
315 |
||
316 |
def delete_info(self, session, eid, etype, uri, extid): |
|
317 |
"""delete system information on deletion of an entity by transfering |
|
318 |
record from the entities table to the deleted_entities table |
|
319 |
""" |
|
320 |
pass |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
|
321 |
|
0 | 322 |
def fti_unindex_entity(self, session, eid): |
323 |
"""remove text content for entity with the given eid from the full text |
|
324 |
index |
|
325 |
""" |
|
326 |
pass |
|
1802
d628defebc17
delete-trailing-whitespace + some copyright update
Adrien Di Mascio <Adrien.DiMascio@logilab.fr>
parents:
1398
diff
changeset
|
327 |
|
0 | 328 |
def fti_index_entity(self, session, entity): |
329 |
"""add text content of a created/modified entity to the full text index |
|
330 |
""" |
|
331 |
pass |