def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
# One additional modification is that we avoid binding to IPv6 servers
# discovered in DNS if the system doesn't have IPv6 functionality.
python类POLLIN的实例源码
def poll2(timeout=0.0, map=None):
# Use the poll() support added to the select module in Python 2.0
if map is None:
map = socket_map
if timeout is not None:
# timeout is in milliseconds
timeout = int(timeout*1000)
pollster = select.poll()
if map:
for fd, obj in map.items():
flags = 0
if obj.readable():
flags |= select.POLLIN | select.POLLPRI
if obj.writable():
flags |= select.POLLOUT
if flags:
# Only check for exceptions if object was either readable
# or writable.
flags |= select.POLLERR | select.POLLHUP | select.POLLNVAL
pollster.register(fd, flags)
try:
r = pollster.poll(timeout)
except select.error, err:
if err.args[0] != EINTR:
raise
r = []
for fd, flags in r:
obj = map.get(fd)
if obj is None:
continue
readwrite(obj, flags)
def register(self, fileobj, events, data=None):
key = super(PollSelector, self).register(fileobj, events, data)
event_mask = 0
if events & EVENT_READ:
event_mask |= select.POLLIN
if events & EVENT_WRITE:
event_mask |= select.POLLOUT
self._poll.register(key.fd, event_mask)
return key
def select(self, timeout=None):
ready = []
fd_events = _syscall_wrapper(self._wrap_poll, True, timeout=timeout)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.POLLIN:
events |= EVENT_WRITE
if event_mask & ~select.POLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def register(self, fileobj, events, data=None):
key = super(PollSelector, self).register(fileobj, events, data)
event_mask = 0
if events & EVENT_READ:
event_mask |= select.POLLIN
if events & EVENT_WRITE:
event_mask |= select.POLLOUT
self._poll.register(key.fd, event_mask)
return key
def select(self, timeout=None):
ready = []
fd_events = _syscall_wrapper(self._wrap_poll, True, timeout=timeout)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.POLLIN:
events |= EVENT_WRITE
if event_mask & ~select.POLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if not sock: # Platform-specific: AppEngine
return False
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except SocketError:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
def register(self, fileobj, events, data=None):
key = super(PollSelector, self).register(fileobj, events, data)
event_mask = 0
if events & EVENT_READ:
event_mask |= select.POLLIN
if events & EVENT_WRITE:
event_mask |= select.POLLOUT
self._poll.register(key.fd, event_mask)
return key
def select(self, timeout=None):
ready = []
fd_events = _syscall_wrapper(self._wrap_poll, True, timeout=timeout)
for fd, event_mask in fd_events:
events = 0
if event_mask & ~select.POLLIN:
events |= EVENT_WRITE
if event_mask & ~select.POLLOUT:
events |= EVENT_READ
key = self._key_from_fd(fd)
if key:
ready.append((key, events & key.events))
return ready
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def is_connection_dropped(conn): # Platform-specific
"""
Returns True if the connection is dropped and should be closed.
:param conn:
:class:`httplib.HTTPConnection` object.
Note: For platforms like AppEngine, this will always return ``False`` to
let the platform handle connection recycling transparently for us.
"""
sock = getattr(conn, 'sock', False)
if sock is False: # Platform-specific: AppEngine
return False
if sock is None: # Connection already closed (such as by httplib).
return True
if not poll:
if not select: # Platform-specific: AppEngine
return False
try:
return select([sock], [], [], 0.0)[0]
except socket.error:
return True
# This version is better on platforms that support it.
p = poll()
p.register(sock, POLLIN)
for (fno, ev) in p.poll(0.0):
if fno == sock.fileno():
# Either data is buffered (bad), or the connection is dropped.
return True
# This function is copied from socket.py in the Python 2.7 standard
# library test suite. Added to its signature is only `socket_options`.
def main(argv=sys.argv):
if tpm_initialize.get_tpm_manufacturer() != 'IBM':
raise Exception("This stub should only be used with the IBM TPM emulator")
# initialize position in ML
pos=0
# check if pcr is clean
output = tpm_exec.run("pcrread -ix %s"%common.IMA_PCR)[0]
pcrval = output[0].split()[5]
if pcrval != ima.START_HASH.encode('hex'):
print "Warning: IMA PCR is not empty, trying to find the last updated file in the measurement list..."
pos = ml_extend(common.IMA_ML, 0, pcrval)
print "Monitoring %s"%(common.IMA_ML)
poll_object = select.poll()
fd_object = file(common.IMA_ML, "r")
number = fd_object.fileno()
poll_object.register(fd_object,select.POLLIN|select.POLLPRI)
while True:
results = poll_object.poll()
for result in results:
if result[0] != number:
continue
pos = ml_extend(common.IMA_ML,pos)
#print "new POS %d"%pos
time.sleep(0.2)
sys.exit(1)
def onconnected(self, connection):
self.socket = server.LineBufferedNonBlockingSocket(connection)
self.values = []
self.msg_queue = []
self.f_on_connected(self)
self.poller = select.poll()
if self.socket:
fd = self.socket.socket.fileno()
else:
fd = self.serial.fileno()
self.poller.register(fd, select.POLLIN)
def poll(self, timeout = 0):
t0 = time.time()
self.socket.flush()
events = self.poller.poll(1000.0 * timeout)
if events != []:
event = events.pop()
fd, flag = event
if flag & (select.POLLERR | select.POLLNVAL):
raise ConnectionLost
if flag & select.POLLIN:
if self.socket and not self.socket.recv():
raise ConnectionLost
return True
return False
def __init__(self, pipe, name, recvfailok):
self.pipe = pipe
self.pollin = select.poll()
self.pollin.register(self.pipe, select.POLLIN)
self.pollout = select.poll()
self.pollout.register(self.pipe, select.POLLOUT)
self.name = name
self.sendfailcount = 0
self.failcountmsg = 1
self.recvfailok = recvfailok
