-
Notifications
You must be signed in to change notification settings - Fork 325
/
writer.py
407 lines (311 loc) · 12.4 KB
/
writer.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
# -*- coding: utf-8 -*-
"""The storage writer."""
import abc
import collections
from plaso.containers import event_sources
from plaso.containers import events
from plaso.containers import reports
from plaso.containers import tasks
from plaso.containers import warnings
from plaso.lib import definitions
class StorageWriter(object):
"""Storage writer interface."""
_CONTAINER_TYPE_ANALYSIS_REPORT = reports.AnalysisReport.CONTAINER_TYPE
_CONTAINER_TYPE_ANALYSIS_WARNING = warnings.AnalysisWarning.CONTAINER_TYPE
_CONTAINER_TYPE_EVENT = events.EventObject.CONTAINER_TYPE
_CONTAINER_TYPE_EVENT_DATA = events.EventData.CONTAINER_TYPE
_CONTAINER_TYPE_EVENT_DATA_STREAM = events.EventDataStream.CONTAINER_TYPE
_CONTAINER_TYPE_EVENT_SOURCE = event_sources.EventSource.CONTAINER_TYPE
_CONTAINER_TYPE_EVENT_TAG = events.EventTag.CONTAINER_TYPE
_CONTAINER_TYPE_EXTRACTION_WARNING = warnings.ExtractionWarning.CONTAINER_TYPE
_CONTAINER_TYPE_PREPROCESSING_WARNING = (
warnings.PreprocessingWarning.CONTAINER_TYPE)
_CONTAINER_TYPE_RECOVERY_WARNING = warnings.RecoveryWarning.CONTAINER_TYPE
_CONTAINER_TYPE_TASK_COMPLETION = tasks.TaskCompletion.CONTAINER_TYPE
_CONTAINER_TYPE_TASK_START = tasks.TaskStart.CONTAINER_TYPE
def __init__(self, storage_type=definitions.STORAGE_TYPE_SESSION):
"""Initializes a storage writer.
Args:
storage_type (Optional[str]): storage type.
"""
super(StorageWriter, self).__init__()
self._attribute_containers_counter = collections.Counter()
self._first_written_event_source_index = 0
self._serializers_profiler = None
self._storage_profiler = None
self._storage_type = storage_type
self._store = None
self._written_event_source_index = 0
@property
def number_of_analysis_reports(self):
"""int: number of analysis reports warnings written."""
return self._attribute_containers_counter[
self._CONTAINER_TYPE_ANALYSIS_REPORT]
@property
def number_of_analysis_warnings(self):
"""int: number of analysis warnings written."""
return self._attribute_containers_counter[
self._CONTAINER_TYPE_ANALYSIS_WARNING]
@property
def number_of_event_sources(self):
"""int: number of event sources written."""
return self._attribute_containers_counter[self._CONTAINER_TYPE_EVENT_SOURCE]
@property
def number_of_event_tags(self):
"""int: number of event tags written."""
return self._attribute_containers_counter[self._CONTAINER_TYPE_EVENT_TAG]
@property
def number_of_events(self):
"""int: number of events written."""
return self._attribute_containers_counter[self._CONTAINER_TYPE_EVENT]
@property
def number_of_extraction_warnings(self):
"""int: number of extraction warnings written."""
return self._attribute_containers_counter[
self._CONTAINER_TYPE_EXTRACTION_WARNING]
@property
def number_of_preprocessing_warnings(self):
"""int: number of preprocessing warnings written."""
return self._attribute_containers_counter[
self._CONTAINER_TYPE_PREPROCESSING_WARNING]
@property
def number_of_recovery_warnings(self):
"""int: number of recovery warnings written."""
return self._attribute_containers_counter[
self._CONTAINER_TYPE_RECOVERY_WARNING]
def _RaiseIfNotWritable(self):
"""Raises if the storage writer is not writable.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
if not self._store:
raise IOError('Unable to write to closed storage writer.')
def AddAttributeContainer(self, container):
"""Adds an attribute container.
Args:
container (AttributeContainer): attribute container.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
self._store.AddAttributeContainer(container)
self._attribute_containers_counter[container.CONTAINER_TYPE] += 1
def AddOrUpdateEventTag(self, event_tag):
"""Adds a new or updates an existing event tag.
Args:
event_tag (EventTag): event tag.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
event_identifier = event_tag.GetEventIdentifier()
existing_event_tag = self._store.GetEventTagByEventIdentifier(
event_identifier)
if not existing_event_tag:
self.AddAttributeContainer(event_tag)
else:
if not set(existing_event_tag.labels).issubset(event_tag.labels):
# No need to update the storage if all the labels are already set.
existing_event_tag.AddLabels(event_tag.labels)
self._store.UpdateAttributeContainer(existing_event_tag)
if self._storage_type == definitions.STORAGE_TYPE_TASK:
self._attribute_containers_counter[self._CONTAINER_TYPE_EVENT] += 1
def Close(self):
"""Closes the storage writer.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
self._store.Close()
self._store = None
def GetAttributeContainerByIdentifier(self, container_type, identifier):
"""Retrieves a specific type of container with a specific identifier.
Args:
container_type (str): container type.
identifier (AttributeContainerIdentifier): attribute container identifier.
Returns:
AttributeContainer: attribute container or None if not available.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
return self._store.GetAttributeContainerByIdentifier(
container_type, identifier)
def GetAttributeContainerByIndex(self, container_type, index):
"""Retrieves a specific attribute container.
Args:
container_type (str): attribute container type.
index (int): attribute container index.
Returns:
AttributeContainer: attribute container or None if not available.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
return self._store.GetAttributeContainerByIndex(container_type, index)
def GetAttributeContainers(self, container_type):
"""Retrieves a specific type of attribute containers.
Args:
container_type (str): attribute container type.
Returns:
generator(AttributeContainers): attribute container generator.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
return self._store.GetAttributeContainers(container_type)
# TODO: remove this helper method, currently only used by parser tests.
def GetEvents(self):
"""Retrieves the events.
Returns:
generator(EventObject): event generator.
"""
return self.GetAttributeContainers(self._CONTAINER_TYPE_EVENT)
@abc.abstractmethod
def GetFirstWrittenEventSource(self):
"""Retrieves the first event source that was written after open.
Using GetFirstWrittenEventSource and GetNextWrittenEventSource newly
added event sources can be retrieved in order of addition.
Returns:
EventSource: event source or None if there are no newly written ones.
"""
@abc.abstractmethod
def GetNextWrittenEventSource(self):
"""Retrieves the next event source that was written after open.
Returns:
EventSource: event source or None if there are no newly written ones.
"""
def GetSessions(self):
"""Retrieves the sessions.
Returns:
generator(Session): session generator.
"""
return self._store.GetSessions()
def GetSortedEvents(self, time_range=None):
"""Retrieves the events in increasing chronological order.
This includes all events written to the storage including those pending
being flushed (written) to the storage.
Args:
time_range (Optional[TimeRange]): time range used to filter events
that fall in a specific period.
Returns:
generator(EventObject): event generator.
"""
return self._store.GetSortedEvents(time_range=time_range)
def GetSystemConfigurationIdentifier(self):
"""Retrieves the system configuration identifier.
Returns:
AttributeContainerIdentifier: system configuration identifier.
"""
return self._store.GetSystemConfigurationIdentifier()
@abc.abstractmethod
def Open(self, **kwargs):
"""Opens the storage writer."""
def SetSerializersProfiler(self, serializers_profiler):
"""Sets the serializers profiler.
Args:
serializers_profiler (SerializersProfiler): serializers profiler.
"""
self._serializers_profiler = serializers_profiler
if self._store:
self._store.SetSerializersProfiler(serializers_profiler)
def SetStorageProfiler(self, storage_profiler):
"""Sets the storage profiler.
Args:
storage_profiler (StorageProfiler): storage profiler.
"""
self._storage_profiler = storage_profiler
if self._store:
self._store.SetStorageProfiler(storage_profiler)
def UpdateAttributeContainer(self, container):
"""Updates an existing attribute container.
Args:
container (AttributeContainer): attribute container.
Raises:
IOError: when the storage writer is closed.
OSError: when the storage writer is closed.
"""
self._RaiseIfNotWritable()
self._store.UpdateAttributeContainer(container)
def WriteSessionCompletion(self, session):
"""Writes session completion information.
Args:
session (Session): session the storage changes are part of.
Raises:
IOError: when the storage writer is closed or if the storage type is
not supported.
OSError: when the storage writer is closed or if the storage type is
not supported.
"""
self._RaiseIfNotWritable()
if self._storage_type != definitions.STORAGE_TYPE_SESSION:
raise IOError('Unsupported storage type.')
session_completion = session.CreateSessionCompletion()
self._store.AddAttributeContainer(session_completion)
def WriteSessionConfiguration(self, session):
"""Writes session configuration information.
Args:
session (Session): session the storage changes are part of.
Raises:
IOError: when the storage writer is closed or if the storage type is
not supported.
OSError: when the storage writer is closed or if the storage type is
not supported.
"""
self._RaiseIfNotWritable()
if self._storage_type != definitions.STORAGE_TYPE_SESSION:
raise IOError('Unsupported storage type.')
session_configuration = session.CreateSessionConfiguration()
self._store.AddAttributeContainer(session_configuration)
def WriteSessionStart(self, session):
"""Writes session start information.
Args:
session (Session): session the storage changes are part of.
Raises:
IOError: when the storage writer is closed or if the storage type is
not supported.
OSError: when the storage writer is closed or if the storage type is
not supported.
"""
self._RaiseIfNotWritable()
if self._storage_type != definitions.STORAGE_TYPE_SESSION:
raise IOError('Unsupported storage type.')
session_start = session.CreateSessionStart()
self._store.AddAttributeContainer(session_start)
def WriteTaskCompletion(self, task):
"""Writes task completion information.
Args:
task (Task): task.
Raises:
IOError: when the storage writer is closed or if the storage type is
not supported.
OSError: when the storage writer is closed or if the storage type is
not supported.
"""
self._RaiseIfNotWritable()
if self._storage_type != definitions.STORAGE_TYPE_TASK:
raise IOError('Unsupported storage type.')
task_completion = task.CreateTaskCompletion()
self._store.WriteTaskCompletion(task_completion)
def WriteTaskStart(self, task):
"""Writes task start information.
Args:
task (Task): task.
Raises:
IOError: when the storage writer is closed or if the storage type is
not supported.
OSError: when the storage writer is closed or if the storage type is
not supported.
"""
self._RaiseIfNotWritable()
if self._storage_type != definitions.STORAGE_TYPE_TASK:
raise IOError('Unsupported storage type.')
task_start = task.CreateTaskStart()
self._store.WriteTaskStart(task_start)