def _geturl(self, url, use_alarm=True):
"""
Download the given url. If use_alarm is True (the default)
timeout and return the TIMEOUT object if the default download
timeout is exceeded.
"""
if not use_alarm:
return urllib2.urlopen(url).read()
try:
alarm(self._url_timeout)
return urllib2.urlopen(url).read()
except KeyboardInterrupt:
return TIMEOUT
finally:
cancel_alarm()
def _timeit(self, code):
"""
Time evaluation of the given code, timing out after
self._url_timeout seconds, and using the default number and
repeat values as options to timeit.
"""
try:
alarm(self._url_timeout)
T = sage_timeit(code, globals(), number=self._timeit_number,
repeat=self._timeit_repeat)
except KeyboardInterrupt:
return TIMEOUT
finally:
cancel_alarm()
return T
def find_next_available_port(interface, start, max_tries=100, verbose=False):
"""
Find the next available port at a given interface, that is, a port for
which a current connection attempt returns a 'Connection refused'
error message. If no port is found, raise a RuntimeError exception.
INPUT:
- ``interface`` - address to check
- ``start`` - an int; the starting port number for the scan
- ``max_tries`` - an int (default: 100); how many ports to scan
- ``verbose`` - a bool (default: True); whether to print information
about the scan
OUTPUT:
- an int - the port number
EXAMPLES::
sage: from sagenb.misc.misc import find_next_available_port
sage: find_next_available_port('127.0.0.1', 9000, verbose=False) # random output -- depends on network
9002
"""
alarm_count = 0
for port in range(start, start + max_tries + 1):
try:
alarm(5)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((interface, port))
except socket.error, msg:
if msg[1] == 'Connection refused':
if verbose: print "Using port = %s" % port
return port
except KeyboardInterrupt:
if verbose: print "alarm"
alarm_count += 1
if alarm_count >= 10:
break
pass
def find_next_available_port(interface, start, max_tries=100, verbose=False):
"""
Find the next available port at a given interface, that is, a port for
which a current connection attempt returns a 'Connection refused'
error message. If no port is found, raise a RuntimeError exception.
INPUT:
- ``interface`` - address to check
- ``start`` - an int; the starting port number for the scan
- ``max_tries`` - an int (default: 100); how many ports to scan
- ``verbose`` - a bool (default: True); whether to print information
about the scan
OUTPUT:
- an int - the port number
EXAMPLES::
sage: from sagenb.misc.misc import find_next_available_port
sage: find_next_available_port('127.0.0.1', 9000, verbose=False) # random output -- depends on network
9002
"""
alarm_count = 0
for port in range(start, start+max_tries+1):
try:
alarm(5)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((interface, port))
except socket.error, msg:
if msg[1] == 'Connection refused':
if verbose: print "Using port = %s"%port
return port
except KeyboardInterrupt:
if verbose: print "alarm"
alarm_count += 1
if alarm_count >= 10:
break
pass
def test_allpub(self):
"""
View every single one of the published worksheets on the
Sage notebook server.
"""
if self._verbose: print "testing download of all published worksheets..."
tm = walltime()
pub = self.get_urls_of_published_worksheets()
try:
alarm(self._url_timeout)
for i, X in enumerate(pub):
t0 = walltime()
self._geturl(X, use_alarm=False)
if self._verbose:
print "Got %s [%s/%s] %.2f seconds"%(X,i+1,len(pub), walltime(t0))
return walltime(tm)
except KeyboardInterrupt:
return TIMEOUT
finally:
cancel_alarm()