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comparison sat/plugins/plugin_misc_android.py @ 2868:5546613f5007

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plugin android: workaround to seek() bug, fixing file upload: seek() is bugged on current version of P4A, arguments are inverted. More details can be found at https://github.com/kivy/python-for-android/issues/1768
author Goffi <goffi@goffi.org>
date Mon, 25 Mar 2019 07:06:41 +0100
parents 26d6ac4e4a66
children 6b00f88316bf
comparison
equal deleted inserted replaced
2867:3cac3d050046 2868:5546613f5007
18 # along with this program. If not, see <http://www.gnu.org/licenses/>. 18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
19 19
20 import sys 20 import sys
21 import os 21 import os
22 import os.path 22 import os.path
23 import tempfile
23 from sat.core.i18n import _, D_ 24 from sat.core.i18n import _, D_
24 from sat.core.constants import Const as C 25 from sat.core.constants import Const as C
25 from sat.core.log import getLogger 26 from sat.core.log import getLogger
26 from sat.core import exceptions 27 from sat.core import exceptions
27 from twisted.internet import reactor 28 from twisted.internet import reactor
28 from twisted.internet import protocol 29 from twisted.internet import protocol
29 from twisted.internet import error as int_error 30 from twisted.internet import error as int_error
31 from twisted.web import client as web_client
30 32
31 log = getLogger(__name__) 33 log = getLogger(__name__)
32 34
33 PLUGIN_INFO = { 35 PLUGIN_INFO = {
34 C.PI_NAME: "Android ", 36 C.PI_NAME: "Android ",
53 SOCKET_FILE = ".socket" 55 SOCKET_FILE = ".socket"
54 STATE_RUNNING = "running" 56 STATE_RUNNING = "running"
55 STATE_PAUSED = "paused" 57 STATE_PAUSED = "paused"
56 STATE_STOPPED = "stopped" 58 STATE_STOPPED = "stopped"
57 STATES = (STATE_RUNNING, STATE_PAUSED, STATE_STOPPED) 59 STATES = (STATE_RUNNING, STATE_PAUSED, STATE_STOPPED)
60
61
62 def determineLength_workaround(self, fObj):
63 """Method working around seek() bug on Android"""
64 try:
65 seek = fObj.seek
66 tell = fObj.tell
67 except AttributeError:
68 return web_client.UNKNOWN_LENGTH
69 originalPosition = tell()
70 seek(os.SEEK_END)
71 end = tell()
72 seek(os.SEEK_SET, originalPosition)
73 return end - originalPosition
74
75
76 def patch_seek_bug():
77 """Check seek bug and apply a workaround if still here
78
79 cf. https://github.com/kivy/python-for-android/issues/1768
80 """
81 with tempfile.TemporaryFile() as f:
82 f.write(b'1234567890')
83 f.seek(0, os.SEEK_END)
84 size = f.tell()
85 if size == 10:
86 log.info(u"seek() bug not present anymore, workaround code can be removed")
87 else:
88 log.warning(u"seek() bug detected, applying a workaround")
89 web_client.FileBodyProducer._determineLength = determineLength_workaround
90
91 patch_seek_bug()
58 92
59 93
60 class FrontendStateProtocol(protocol.Protocol): 94 class FrontendStateProtocol(protocol.Protocol):
61 95
62 def __init__(self, android_plugin): 96 def __init__(self, android_plugin):