/
updateCheck.py
531 lines (477 loc) · 17.7 KB
/
updateCheck.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
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
#updateCheck.py
#A part of NonVisual Desktop Access (NVDA)
#This file is covered by the GNU General Public License.
#See the file COPYING for more details.
#Copyright (C) 2012-2016 NV Access Limited
"""Update checking functionality.
@note: This module may raise C{RuntimeError} on import if update checking for this build is not supported.
"""
import globalVars
if globalVars.appArgs.secure:
raise RuntimeError("updates disabled in secure mode")
import versionInfo
if not versionInfo.updateVersionType:
raise RuntimeError("No update version type, update checking not supported")
import winVersion
import os
import threading
import time
import cPickle
import urllib
import tempfile
import hashlib
import ctypes.wintypes
import ssl
import wx
import languageHandler
import gui
from gui import guiHelper
from logHandler import log
import config
import shellapi
import winUser
#: The URL to use for update checks.
CHECK_URL = "https://www.nvaccess.org/nvdaUpdateCheck"
#: The time to wait between checks.
CHECK_INTERVAL = 86400 # 1 day
#: The time to wait before retrying a failed check.
RETRY_INTERVAL = 600 # 10 min
#: The download block size in bytes.
DOWNLOAD_BLOCK_SIZE = 8192 # 8 kb
#: Persistent state information.
#: @type: dict
state = None
_stateFileName = None
#: The single instance of L{AutoUpdateChecker} if automatic update checking is enabled,
#: C{None} if it is disabled.
autoChecker = None
def checkForUpdate(auto=False):
"""Check for an updated version of NVDA.
This will block, so it generally shouldn't be called from the main thread.
@param auto: Whether this is an automatic check for updates.
@type auto: bool
@return: Information about the update or C{None} if there is no update.
@rtype: dict
@raise RuntimeError: If there is an error checking for an update.
"""
params = {
"autoCheck": auto,
"version": versionInfo.version,
"versionType": versionInfo.updateVersionType,
"osVersion": winVersion.winVersionText,
"x64": os.environ.get("PROCESSOR_ARCHITEW6432") == "AMD64",
"language": languageHandler.getLanguage(),
"installed": config.isInstalledCopy(),
}
url = "%s?%s" % (CHECK_URL, urllib.urlencode(params))
try:
res = urllib.urlopen(url)
except IOError as e:
if isinstance(e.strerror, ssl.SSLError) and e.strerror.reason == "CERTIFICATE_VERIFY_FAILED":
# #4803: Windows fetches trusted root certificates on demand.
# Python doesn't trigger this fetch (PythonIssue:20916), so try it ourselves
_updateWindowsRootCertificates()
# and then retry the update check.
res = urllib.urlopen(url)
else:
raise
if res.code != 200:
raise RuntimeError("Checking for update failed with code %d" % res.code)
info = {}
for line in res:
line = line.rstrip()
try:
key, val = line.split(": ", 1)
except ValueError:
raise RuntimeError("Error in update check output")
info[key] = val
if not info:
return None
return info
class UpdateChecker(object):
"""Check for an updated version of NVDA, presenting appropriate user interface.
The check is performed in the background.
This class is for manual update checks.
To use, call L{check} on an instance.
"""
AUTO = False
def check(self):
"""Check for an update.
"""
t = threading.Thread(target=self._bg)
t.daemon = True
self._started()
t.start()
def _bg(self):
try:
info = checkForUpdate(self.AUTO)
except:
log.debugWarning("Error checking for update", exc_info=True)
self._error()
return
self._result(info)
if info:
state["dontRemindVersion"] = info["version"]
state["lastCheck"] = time.time()
saveState()
if autoChecker:
autoChecker.setNextCheck()
def _started(self):
self._progressDialog = gui.IndeterminateProgressDialog(gui.mainFrame,
# Translators: The title of the dialog displayed while manually checking for an NVDA update.
_("Checking for Update"),
# Translators: The progress message displayed while manually checking for an NVDA update.
_("Checking for update"))
def _error(self):
wx.CallAfter(self._progressDialog.done)
self._progressDialog = None
wx.CallAfter(gui.messageBox,
# Translators: A message indicating that an error occurred while checking for an update to NVDA.
_("Error checking for update."),
# Translators: The title of an error message dialog.
_("Error"),
wx.OK | wx.ICON_ERROR)
def _result(self, info):
wx.CallAfter(self._progressDialog.done)
self._progressDialog = None
wx.CallAfter(UpdateResultDialog, gui.mainFrame, info, False)
class AutoUpdateChecker(UpdateChecker):
"""Automatically check for an updated version of NVDA.
To use, create a single instance and maintain a reference to it.
Checks will then be performed automatically.
"""
AUTO = True
def __init__(self):
self._checkTimer = wx.PyTimer(self.check)
# Set the initial check based on the last check time.
# #3260: If the system time is earlier than the last check,
# treat the last check as being right now (so the next will be tomorrow).
secsSinceLast = max(time.time() - state["lastCheck"], 0)
# The maximum time till the next check is CHECK_INTERVAL.
secsTillNext = CHECK_INTERVAL - int(min(secsSinceLast, CHECK_INTERVAL))
self._checkTimer.Start(secsTillNext * 1000, True)
def terminate(self):
self._checkTimer.Stop()
self._checkTimer = None
def setNextCheck(self, isRetry=False):
# #6127: Timers must be manipulated from the main thread.
wx.CallAfter(self._checkTimer.Stop)
wx.CallAfter(self._checkTimer.Start, (RETRY_INTERVAL if isRetry else CHECK_INTERVAL) * 1000, True)
def _started(self):
log.info("Performing automatic update check")
def _error(self):
self.setNextCheck(isRetry=True)
def _result(self, info):
if not info:
return
if info["version"] == state["dontRemindVersion"]:
return
wx.CallAfter(UpdateResultDialog, gui.mainFrame, info, True)
class UpdateResultDialog(wx.Dialog):
def __init__(self, parent, updateInfo, auto):
# Translators: The title of the dialog informing the user about an NVDA update.
super(UpdateResultDialog, self).__init__(parent, title=_("NVDA Update"))
self.updateInfo = updateInfo
mainSizer = wx.BoxSizer(wx.VERTICAL)
sHelper = guiHelper.BoxSizerHelper(self, orientation=wx.VERTICAL)
if updateInfo:
self.isInstalled = config.isInstalledCopy()
self.urls = updateInfo["launcherUrl"].split(" ")
self.fileHash = updateInfo.get("launcherHash")
# Translators: A message indicating that an updated version of NVDA is available.
# {version} will be replaced with the version; e.g. 2011.3.
message = _("NVDA version {version} is available.").format(**updateInfo)
else:
# Translators: A message indicating that no update to NVDA is available.
message = _("No update available.")
sHelper.addItem(wx.StaticText(self, label=message))
bHelper = sHelper.addDialogDismissButtons(guiHelper.ButtonHelper(wx.HORIZONTAL))
if updateInfo:
if self.isInstalled:
# Translators: The label of a button to download and install an NVDA update.
label = _("Download and &install update")
else:
# Translators: The label of a button to download an NVDA update.
label = _("&Download update")
downloadButton = bHelper.addButton(self, label=label)
downloadButton.Bind(wx.EVT_BUTTON, self.onDownloadButton)
if auto:
# Translators: The label of a button to remind the user later about performing some action.
remindMeButton = bHelper.addButton(self, label=_("Remind me &later"))
remindMeButton.Bind(wx.EVT_BUTTON, self.onLaterButton)
remindMeButton.SetFocus()
# Translators: The label of a button to close a dialog.
closeButton = bHelper.addButton(self, wx.ID_CLOSE, label=_("&Close"))
closeButton.Bind(wx.EVT_BUTTON, lambda evt: self.Close())
self.Bind(wx.EVT_CLOSE, lambda evt: self.Destroy())
self.EscapeId = wx.ID_CLOSE
mainSizer.Add(sHelper.sizer, border=guiHelper.BORDER_FOR_DIALOGS, flag=wx.ALL)
self.Sizer = mainSizer
mainSizer.Fit(self)
self.Center(wx.BOTH | wx.CENTER_ON_SCREEN)
self.Show()
def onDownloadButton(self, evt):
self.Hide()
DonateRequestDialog(gui.mainFrame, self._download)
def _download(self):
if self.isInstalled:
UpdateDownloader(self.urls, fileHash=self.fileHash).start()
else:
os.startfile(self.urls[0])
self.Destroy()
def onLaterButton(self, evt):
state["dontRemindVersion"] = None
saveState()
self.Close()
class UpdateDownloader(object):
"""Download and start installation of an updated version of NVDA, presenting appropriate user interface.
To use, call L{start} on an instance.
"""
def __init__(self, urls, fileHash=None):
"""Constructor.
@param urls: URLs to try for the update file.
@type urls: list of str
@param fileHash: The SHA-1 hash of the file as a hex string.
@type fileHash: basestring
"""
self.urls = urls
self.destPath = tempfile.mktemp(prefix="nvda_update_", suffix=".exe")
self.fileHash = fileHash
def start(self):
"""Start the download.
"""
self._shouldCancel = False
# Use a timer because timers aren't re-entrant.
self._guiExecTimer = wx.PyTimer(self._guiExecNotify)
gui.mainFrame.prePopup()
# Translators: The title of the dialog displayed while downloading an NVDA update.
self._progressDialog = wx.ProgressDialog(_("Downloading Update"),
# Translators: The progress message indicating that a connection is being established.
_("Connecting"),
# PD_AUTO_HIDE is required because ProgressDialog.Update blocks at 100%
# and waits for the user to press the Close button.
style=wx.PD_CAN_ABORT | wx.PD_ELAPSED_TIME | wx.PD_REMAINING_TIME | wx.PD_AUTO_HIDE,
parent=gui.mainFrame)
self._progressDialog.Raise()
t = threading.Thread(target=self._bg)
t.daemon = True
t.start()
def _guiExec(self, func, *args):
self._guiExecFunc = func
self._guiExecArgs = args
if not self._guiExecTimer.IsRunning():
# #6127: Timers must be manipulated from the main thread.
wx.CallAfter(self._guiExecTimer.Start, 50, True)
def _guiExecNotify(self):
self._guiExecFunc(*self._guiExecArgs)
def _bg(self):
success=False
for url in self.urls:
try:
self._download(url)
except:
log.debugWarning("Error downloading %s" % url, exc_info=True)
else: #Successfully downloaded or canceled
if not self._shouldCancel:
success=True
break
else:
# None of the URLs succeeded.
self._guiExec(self._error)
return
if not success:
try:
os.remove(self.destPath)
except OSError:
pass
return
self._guiExec(self._downloadSuccess)
def _download(self, url):
remote = urllib.urlopen(url)
if remote.code != 200:
raise RuntimeError("Download failed with code %d" % remote.code)
# #2352: Some security scanners such as Eset NOD32 HTTP Scanner
# cause huge read delays while downloading.
# Therefore, set a higher timeout.
remote.fp._sock.settimeout(120)
size = int(remote.headers["content-length"])
local = file(self.destPath, "wb")
if self.fileHash:
hasher = hashlib.sha1()
self._guiExec(self._downloadReport, 0, size)
read = 0
chunk=DOWNLOAD_BLOCK_SIZE
while True:
if self._shouldCancel:
return
if size -read <chunk:
chunk =size -read
block = remote.read(chunk)
if not block:
break
read += len(block)
if self._shouldCancel:
return
local.write(block)
if self.fileHash:
hasher.update(block)
self._guiExec(self._downloadReport, read, size)
if read < size:
raise RuntimeError("Content too short")
if self.fileHash and hasher.hexdigest() != self.fileHash:
raise RuntimeError("Content has incorrect file hash")
self._guiExec(self._downloadReport, read, size)
def _downloadReport(self, read, size):
if self._shouldCancel:
return
percent = int(float(read) / size * 100)
# Translators: The progress message indicating that a download is in progress.
cont, skip = self._progressDialog.Update(percent, _("Downloading"))
if not cont:
self._shouldCancel = True
self._stopped()
def _stopped(self):
self._guiExecTimer = None
self._guiExecFunc = None
self._guiExecArgs = None
self._progressDialog.Hide()
self._progressDialog.Destroy()
self._progressDialog = None
# Not sure why, but this doesn't work if we call it directly here.
wx.CallLater(50, gui.mainFrame.postPopup)
def _error(self):
self._stopped()
gui.messageBox(
# Translators: A message indicating that an error occurred while downloading an update to NVDA.
_("Error downloading update."),
_("Error"),
wx.OK | wx.ICON_ERROR)
def _downloadSuccess(self):
self._stopped()
# Translators: The message presented when the update has been successfully downloaded
# and is about to be installed.
gui.messageBox(_("Update downloaded. It will now be installed."),
# Translators: The title of the dialog displayed when the update is about to be installed.
_("Install Update"))
state["removeFile"] = self.destPath
saveState()
# #4475: ensure that the new process shows its first window, by providing SW_SHOWNORMAL
shellapi.ShellExecute(None, None,
self.destPath.decode("mbcs"),
u"--install -m",
None, winUser.SW_SHOWNORMAL)
class DonateRequestDialog(wx.Dialog):
# Translators: The message requesting donations from users.
MESSAGE = _(
"We need your help in order to continue to improve NVDA.\n"
"This project relies primarily on donations and grants. By donating, you are helping to fund full time development.\n"
"If even $10 is donated for every download, we will be able to cover all of the ongoing costs of the project.\n"
"All donations are received by NV Access, the non-profit organisation which develops NVDA.\n"
"Thank you for your support."
)
def __init__(self, parent, continueFunc):
# Translators: The title of the dialog requesting donations from users.
super(DonateRequestDialog, self).__init__(parent, title=_("Please Donate"))
self._continue = continueFunc
mainSizer=wx.BoxSizer(wx.VERTICAL)
item = wx.StaticText(self, label=self.MESSAGE)
mainSizer.Add(item, border=20, flag=wx.LEFT | wx.RIGHT | wx.TOP)
sizer = wx.BoxSizer(wx.HORIZONTAL)
# Translators: The label of the button to donate
# in the "Please Donate" dialog.
item = self.donateButton = wx.Button(self, label=_("&Donate"))
item.Bind(wx.EVT_BUTTON, self.onDonate)
sizer.Add(item)
# Translators: The label of the button to decline donation
# in the "Please Donate" dialog.
item = wx.Button(self, wx.ID_CLOSE, label=_("&Not now"))
item.Bind(wx.EVT_BUTTON, lambda evt: self.Close())
sizer.Add(item)
self.Bind(wx.EVT_CLOSE, self.onClose)
self.EscapeId = wx.ID_CLOSE
mainSizer.Add(sizer, flag=wx.TOP | wx.BOTTOM | wx.ALIGN_CENTER_HORIZONTAL, border=20)
self.Sizer = mainSizer
mainSizer.Fit(self)
self.Center(wx.BOTH | wx.CENTER_ON_SCREEN)
self.Show()
def onDonate(self, evt):
os.startfile(gui.DONATE_URL)
# Translators: The label of a button to indicate that the user is finished donating
# in the "Please Donate" dialog.
self.donateButton.Label = _("&Done")
self.donateButton.Bind(wx.EVT_BUTTON, lambda evt: self.Close())
def onClose(self, evt):
self.Hide()
self._continue()
self.Destroy()
def saveState():
try:
cPickle.dump(state, file(_stateFilename, "wb"))
except:
log.debugWarning("Error saving state", exc_info=True)
def initialize():
global state, _stateFilename, autoChecker
_stateFilename = os.path.join(globalVars.appArgs.configPath, "updateCheckState.pickle")
try:
state = cPickle.load(file(_stateFilename, "r"))
except:
# Defaults.
state = {
"lastCheck": 0,
"dontRemindVersion": None,
}
# If we just updated, remove the updater file.
try:
os.remove(state.pop("removeFile"))
saveState()
except (KeyError, OSError):
pass
if config.conf["update"]["autoCheck"] and not globalVars.appArgs.launcher:
autoChecker = AutoUpdateChecker()
def terminate():
global state, autoChecker
state = None
if autoChecker:
autoChecker.terminate()
autoChecker = None
# These structs are only complete enough to achieve what we need.
class CERT_USAGE_MATCH(ctypes.Structure):
_fields_ = (
("dwType", ctypes.wintypes.DWORD),
# CERT_ENHKEY_USAGE struct
("cUsageIdentifier", ctypes.wintypes.DWORD),
("rgpszUsageIdentifier", ctypes.c_void_p), # LPSTR *
)
class CERT_CHAIN_PARA(ctypes.Structure):
_fields_ = (
("cbSize", ctypes.wintypes.DWORD),
("RequestedUsage", CERT_USAGE_MATCH),
("RequestedIssuancePolicy", CERT_USAGE_MATCH),
("dwUrlRetrievalTimeout", ctypes.wintypes.DWORD),
("fCheckRevocationFreshnessTime", ctypes.wintypes.BOOL),
("dwRevocationFreshnessTime", ctypes.wintypes.DWORD),
("pftCacheResync", ctypes.c_void_p), # LPFILETIME
("pStrongSignPara", ctypes.c_void_p), # PCCERT_STRONG_SIGN_PARA
("dwStrongSignFlags", ctypes.wintypes.DWORD),
)
def _updateWindowsRootCertificates():
crypt = ctypes.windll.crypt32
# Get the server certificate.
sslCont = ssl._create_unverified_context()
u = urllib.urlopen("https://www.nvaccess.org/nvdaUpdateCheck", context=sslCont)
cert = u.fp._sock.getpeercert(True)
u.close()
# Convert to a form usable by Windows.
certCont = crypt.CertCreateCertificateContext(
0x00000001, # X509_ASN_ENCODING
cert,
len(cert))
# Ask Windows to build a certificate chain, thus triggering a root certificate update.
chainCont = ctypes.c_void_p()
crypt.CertGetCertificateChain(None, certCont, None, None,
ctypes.byref(CERT_CHAIN_PARA(cbSize=ctypes.sizeof(CERT_CHAIN_PARA),
RequestedUsage=CERT_USAGE_MATCH())),
0, None,
ctypes.byref(chainCont))
crypt.CertFreeCertificateChain(chainCont)
crypt.CertFreeCertificateContext(certCont)