[英]Python urllib2.urlopen freezes script infinitely even though timeout is set
The function urllib2.urlopen
freezes. urllib2.urlopen
函数冻结了。 So my question is simple: 所以我的问题很简单:
urlopen
freeze my script for ever even though timeout is set? urlopen
也会冻结我的脚本? This is the part where is freezes (In own3d.py ): 这是冻结的部分(在own3d.py中 ):
# Try three times to make contact
while True:
try:
# Connect to API
# Right here! It freezes here
connection = urllib2.urlopen(request, timeout=10)
xmlstring = connection.read()
except URLError as e:
tries += 1
if tries >= 3:
sys.stderr.write(
'own3dStreamsUpdater: Fatal error: Repeated timeouts')
exit()
This is the stack trace after my KeyboardInterrupt 这是我的KeyboardInterrupt之后的堆栈跟踪
Traceback (most recent call last): File "", line 1, in File "honsapp/own3dStreamsUpdater.py", line 53, in updateStreamInfo streamInfo = getStreamInfo(stream) File "honsapp/own3d.py", line 98, in getStreamInfo connection = urllib2.urlopen(request, timeout=10) File "/usr/local/lib/python2.7/urllib2.py", line 126, in urlopen return _opener.open(url, data, timeout) File "/usr/local/lib/python2.7/urllib2.py", line 394, in open response = self._open(req, data) File "/usr/local/lib/python2.7/urllib2.py", line 412, in _open '_open', req) File "/usr/local/lib/python2.7/urllib2.py", line 372, in _call_chain result = func(*args) File "/usr/local/lib/python2.7/urllib2.py", line 1199, in http_open return self.do_open(httplib.HTTPConnection, req) File "/usr/local/lib/python2.7/urllib2.py", line 1170, in do_open r = h.getresponse(buffering=True) File "/usr/local/lib/python2.7/httplib.py", line 1027, in getresponse response.begin() File "/usr/local/lib/python2.7/httplib.py", line 407, in begin version, status, reason = self._read_status() File "/usr/local/lib/python2.7/httplib.py", line 365, in _read_status line = self.fp.readline() File "/usr/local/lib/python2.7/socket.py", line 447, in readline data = self._sock.recv(self._rbufsize) KeyboardInterrupt
I let my script run over night. 我让我的剧本过夜了。 I don't know exactly how long it took (Though more than five minutes) but the script finally gave up and gave me a stacktrace:
我不知道它花了多长时间(虽然超过五分钟),但剧本终于放弃并给了我一个堆栈跟踪:
Traceback (most recent call last): File "honsapp/own3dStreamsUpdater.py", line 260, in newInfo() File "honsapp/own3dStreamsUpdater.py", line 172, in newInfo result = updateStreamInfo(stream) File "honsapp/own3dStreamsUpdater.py", line 53, in updateStreamInfo streamInfo = getStreamInfo(stream) File "/root/Dropbox/Projects/honstreams/honsapp/own3d.py", line 98, in getStreamInfo connection = urllib2.urlopen(request, timeout=10) File "/usr/local/lib/python2.7/urllib2.py", line 126, in urlopen return _opener.open(url, data, timeout) File "/usr/local/lib/python2.7/urllib2.py", line 394, in open response = self._open(req, data) File "/usr/local/lib/python2.7/urllib2.py", line 412, in _open '_open', req) File "/usr/local/lib/python2.7/urllib2.py", line 372, in _call_chain result = func(*args) File "/usr/local/lib/python2.7/urllib2.py", line 1199, in http_open return self.do_open(httplib.HTTPConnection, req) File "/usr/local/lib/python2.7/urllib2.py", line 1170, in do_open r = h.getresponse(buffering=True) File "/usr/local/lib/python2.7/httplib.py", line 1027, in getresponse response.begin() File "/usr/local/lib/python2.7/httplib.py", line 407, in begin version, status, reason = self._read_status() File "/usr/local/lib/python2.7/httplib.py", line 371, in _read_status raise BadStatusLine(line) httplib.BadStatusLine: ''
This script doesn't freeze at all, but it's a brilliant example of why you shouldn't code while tired. 这个脚本根本不会冻结,但它是一个很好的例子,说明为什么你不应该在疲倦时编码。 The loop that's supposed to try to connect to the API three times will continue for ever, because I forgot to put a
break
in there. 应该尝试连接到API三次的循环将永远持续下去,因为我忘了在那里
break
一下。
This question was so stupid I wouldn't blame you for removing it. 这个问题是如此愚蠢,我不会责怪你删除它。
Fixed code: 固定代码:
# Try three times to make contact
while True:
try:
# Connect to API
connection = urllib2.urlopen(request, timeout=10)
xmlstring = connection.read()
break
except URLError as e:
tries += 1
if tries >= 3:
sys.stderr.write(
'own3dStreamsUpdater: Fatal error: Repeated timeouts')
exit()
Are you sure that the urlopen() call hangs? 你确定urlopen()调用挂起了吗? Because your while loop does not terminate if the call is successful.
因为如果调用成功,你的while循环不会终止。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.