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
|
#!/usr/bin/python
# -*- coding: latin1 -*-
### Copyright (C) 2011 Damon Lynch <damonlynch@gmail.com>
### 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 2 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, write to the Free Software
### Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
import multiprocessing
import tempfile
import os
import gio
import logging
logger = multiprocessing.get_logger()
import rpdmultiprocessing as rpdmp
import rpdfile
import problemnotification as pn
import config
PHOTO_BACKUP = 1
VIDEO_BACKUP = 2
PHOTO_VIDEO_BACKUP = 3
from gettext import gettext as _
class BackupFiles(multiprocessing.Process):
def __init__(self, path, name,
batch_size_MB, results_pipe, terminate_queue,
run_event):
multiprocessing.Process.__init__(self)
self.results_pipe = results_pipe
self.terminate_queue = terminate_queue
self.batch_size_bytes = batch_size_MB * 1048576 # * 1024 * 1024
self.path = path
self.mount_name = name
self.run_event = run_event
def check_termination_request(self):
"""
Check to see this process has not been requested to immediately terminate
"""
if not self.terminate_queue.empty():
x = self.terminate_queue.get()
# terminate immediately
logger.info("Terminating file backup")
return True
return False
def update_progress(self, amount_downloaded, total):
# first check if process is being terminated
self.amount_downloaded = amount_downloaded
if not self.terminate_queue.empty():
# it is - cancel the current copy
self.cancel_copy.cancel()
else:
if not self.total_reached:
chunk_downloaded = amount_downloaded - self.bytes_downloaded
if (chunk_downloaded > self.batch_size_bytes) or (amount_downloaded == total):
self.bytes_downloaded = amount_downloaded
if amount_downloaded == total:
# this function is called a couple of times when total is reached
self.total_reached = True
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_BYTES, (self.scan_pid, self.pid, self.total_downloaded + amount_downloaded, chunk_downloaded))))
if amount_downloaded == total:
self.bytes_downloaded = 0
def progress_callback(self, amount_downloaded, total):
self.update_progress(amount_downloaded, total)
def run(self):
self.cancel_copy = gio.Cancellable()
self.bytes_downloaded = 0
self.total_downloaded = 0
while True:
self.amount_downloaded = 0
move_succeeded, rpd_file, path_suffix, backup_duplicate_overwrite = self.results_pipe.recv()
if rpd_file is None:
# this is a termination signal
return None
# pause if instructed by the caller
self.run_event.wait()
if self.check_termination_request():
return None
backup_succeeded = False
self.scan_pid = rpd_file.scan_pid
if move_succeeded:
self.total_reached = False
source = gio.File(path=rpd_file.download_full_file_name)
if path_suffix is None:
dest_base_dir = self.path
else:
dest_base_dir = os.path.join(self.path, path_suffix)
dest_dir = os.path.join(dest_base_dir, rpd_file.download_subfolder)
backup_full_file_name = os.path.join(
dest_dir,
rpd_file.download_name)
subfolder = gio.File(path=dest_dir)
if not subfolder.query_exists(cancellable=None):
# create the subfolders on the backup path
try:
subfolder.make_directory_with_parents(cancellable=gio.Cancellable())
except gio.Error, inst:
# There is a tiny chance directory may have been created by
# another process between the time it takes to query and
# the time it takes to create a new directory.
# Ignore such errors.
if inst.code <> gio.ERROR_EXISTS:
logger.error("Failed to create backup subfolder: %s", dest_dir)
logger.error(inst)
rpd_file.add_problem(None, pn.BACKUP_DIRECTORY_CREATION, self.mount_name)
rpd_file.add_extra_detail('%s%s' % (pn.BACKUP_DIRECTORY_CREATION, self.mount_name), inst)
rpd_file.error_title = _('Backing up error')
rpd_file.error_msg = \
_("Destination directory could not be created: %(directory)s\n") % \
{'directory': subfolder, } + \
_("Source: %(source)s\nDestination: %(destination)s") % \
{'source': rpd_file.download_full_file_name,
'destination': backup_full_file_name} + "\n" + \
_("Error: %(inst)s") % {'inst': inst}
dest = gio.File(path=backup_full_file_name)
if backup_duplicate_overwrite:
flags = gio.FILE_COPY_OVERWRITE
else:
flags = gio.FILE_COPY_NONE
try:
source.copy(dest, self.progress_callback, flags,
cancellable=self.cancel_copy)
backup_succeeded = True
except gio.Error, inst:
fileNotBackedUpMessageDisplayed = True
rpd_file.add_problem(None, pn.BACKUP_ERROR, self.mount_name)
rpd_file.add_extra_detail('%s%s' % (pn.BACKUP_ERROR, self.mount_name), inst)
rpd_file.error_title = _('Backing up error')
rpd_file.error_msg = \
_("Source: %(source)s\nDestination: %(destination)s") % \
{'source': rpd_file.download_full_file_name, 'destination': backup_full_file_name} + "\n" + \
_("Error: %(inst)s") % {'inst': inst}
logger.error("%s:\n%s", rpd_file.error_title, rpd_file.error_msg)
if not backup_succeeded:
if rpd_file.status == config.STATUS_DOWNLOAD_FAILED:
rpd_file.status = config.STATUS_DOWNLOAD_AND_BACKUP_FAILED
else:
rpd_file.status = config.STATUS_BACKUP_PROBLEM
self.total_downloaded += rpd_file.size
bytes_not_downloaded = rpd_file.size - self.amount_downloaded
if bytes_not_downloaded:
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_BYTES, (self.scan_pid, self.pid, self.total_downloaded, bytes_not_downloaded))))
self.results_pipe.send((rpdmp.CONN_PARTIAL, (rpdmp.MSG_FILE,
(backup_succeeded, rpd_file))))
|
