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
|
# -*- coding: utf-8 -*-
# utils.py
# Copyright (C) 2013, 2014, 2015 LEAP
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
"""
Logs utilities
"""
import os
import sys
from leap.bitmask.config import flags
from leap.bitmask.logs import LOG_FORMAT
from leap.bitmask.logs.log_silencer import SelectiveSilencerFilter
from leap.bitmask.logs.safezmqhandler import SafeZMQHandler
# from leap.bitmask.logs.streamtologger import StreamToLogger
from leap.bitmask.platform_init import IS_WIN
from leap.bitmask.util import get_path_prefix
from leap.common.files import mkdir_p
from PySide import QtCore
import logbook
from logbook.more import ColorizedStderrHandler
from logbook.queues import ZeroMQSubscriber
# NOTE: make sure that the folder exists, the logger is created before saving
# settings on the first run.
_base = os.path.join(get_path_prefix(), "leap")
mkdir_p(_base)
BITMASK_LOG_FILE = os.path.join(_base, 'bitmask.log')
def get_logger(perform_rollover=False):
"""
Push to the app stack the needed handlers and return a Logger object.
:rtype: logbook.Logger
"""
level = logbook.WARNING
if flags.DEBUG:
level = logbook.NOTSET
# This handler consumes logs not handled by the others
null_handler = logbook.NullHandler(bubble=False)
null_handler.push_application()
silencer = SelectiveSilencerFilter()
zmq_handler = SafeZMQHandler('tcp://127.0.0.1:5000', multi=True,
level=level, filter=silencer.filter)
zmq_handler.push_application()
file_handler = logbook.RotatingFileHandler(
BITMASK_LOG_FILE, format_string=LOG_FORMAT, bubble=True,
filter=silencer.filter, max_size=sys.maxint)
if perform_rollover:
file_handler.perform_rollover()
file_handler.push_application()
# don't use simple stream, go for colored log handler instead
# stream_handler = logbook.StreamHandler(sys.stdout,
# format_string=LOG_FORMAT,
# bubble=True)
# stream_handler.push_application()
stream_handler = ColorizedStderrHandler(
level=level, format_string=LOG_FORMAT, bubble=True,
filter=silencer.filter)
stream_handler.push_application()
logger = logbook.Logger('leap')
return logger
def replace_stdout_stderr_with_logging(logger=None):
"""
NOTE:
we are not using this right now (see commented lines on app.py),
this needs to be reviewed since the log handler has changed.
Replace:
- the standard output
- the standard error
- the twisted log output
with a custom one that writes to the logger.
"""
# Disabling this on windows since it breaks ALL THE THINGS
# The issue for this is #4149
if not IS_WIN:
# logger = get_logger()
# sys.stdout = StreamToLogger(logger, logbook.NOTSET)
# sys.stderr = StreamToLogger(logger, logging.ERROR)
# Replace twisted's logger to use our custom output.
from twisted.python import log
log.startLogging(sys.stdout)
class QtLogHandler(logbook.Handler, logbook.StringFormatterHandlerMixin):
"""
Custom log handler which emits a log record with the message properly
formatted using a Qt Signal.
"""
class _QtSignaler(QtCore.QObject):
"""
inline class used to hold the `new_log` Signal, if this is used
directly in the outside class it fails due how PySide works.
This is the message we get if not use this method:
TypeError: Error when calling the metaclass bases
metaclass conflict: the metaclass of a derived class must be a
(non-strict) subclass of the metaclasses of all its bases
"""
new_log = QtCore.Signal(object)
def emit(self, data):
"""
emit the `new_log` Signal with the given `data` parameter.
:param data: the data to emit along with the signal.
:type data: object
"""
# WARNING: the new-style connection does NOT work because PySide
# translates the emit method to self.emit, and that collides with
# the emit method for logging.Handler
# self.new_log.emit(log_item)
QtCore.QObject.emit(self, QtCore.SIGNAL('new_log(PyObject)'), data)
def __init__(self, level=logbook.NOTSET, format_string=None,
encoding=None, filter=None, bubble=False):
logbook.Handler.__init__(self, level, filter, bubble)
logbook.StringFormatterHandlerMixin.__init__(self, format_string)
self.qt = self._QtSignaler()
self.logs = []
def __enter__(self):
return logbook.Handler.__enter__(self)
def __exit__(self, exc_type, exc_value, tb):
return logbook.Handler.__exit__(self, exc_type, exc_value, tb)
def emit(self, record):
"""
Emit the specified logging record using a Qt Signal.
Also add it to the history in order to be able to access it later.
:param record: the record to emit
:type record: logbook.LogRecord
"""
global _LOGS_HISTORY
record.msg = self.format(record)
# NOTE: not optimal approach, we may want to look at
# bisect.insort with a custom approach to use key or
# http://code.activestate.com/recipes/577197-sortedcollection/
# Sort logs on arrival, logs transmitted over zmq may arrive unsorted.
self.logs.append(record)
self.logs = sorted(self.logs, key=lambda r: r.time)
# XXX: emitting the record on arrival does not allow us to sort here so
# in the GUI the logs may arrive with with some time sort problem.
# We should implement a sort-on-arrive for the log window.
# Maybe we should switch to a tablewidget item that sort automatically
# by timestamp.
# As a user workaround you can close/open the log window
self.qt.emit(record)
class _LogController(object):
def __init__(self):
self._qt_handler = QtLogHandler(format_string=LOG_FORMAT)
self._logbook_controller = None
self.new_log = self._qt_handler.qt.new_log
def start_logbook_subscriber(self):
"""
Run in the background the log receiver.
"""
if self._logbook_controller is None:
subscriber = ZeroMQSubscriber('tcp://127.0.0.1:5000', multi=True)
self._logbook_controller = subscriber.dispatch_in_background(
self._qt_handler)
def stop_logbook_subscriber(self):
"""
Stop the background thread that receives messages through zmq, also
close the subscriber socket.
This allows us to re-create the subscriber when we reopen this window
without getting an error at trying to connect twice to the zmq port.
"""
if self._logbook_controller is not None:
self._logbook_controller.stop()
self._logbook_controller.subscriber.close()
self._logbook_controller = None
def get_logs(self):
return self._qt_handler.logs
# use a global variable to store received logs through different opened
# instances of the log window as well as to containing the logbook background
# handle.
LOG_CONTROLLER = _LogController()
|
