def update(self, spin):
""" This method is called on READ to recv
data from the socket.
Events: LOAD, CLOSE, RECV_ERR
"""
try:
# Receive self.SIZE bytes at most.
data = spin.recv(self.SIZE)
# If data == '' then it is over.
if not data: spawn(spin, CLOSE, '')
# Otherwise it arose data.
else: spawn(spin, LOAD, data)
except socket.error as excpt:
# The excpt.args[0] contains the socket
# status.
err = excpt.args[0]
# If it is the case of the connection being closed
# we spawn CLOSE with the motive.
if err in CLOSE_ERR_CODE:
spawn(spin, CLOSE, err)
else:
# In case of error.
spawn(spin, RECV_ERR, err)
debug()
def update(self, spin):
""" This method is called on READ to recv
data from the socket.
Events: LOAD, CLOSE, RECV_ERR
"""
try:
# Receive self.SIZE bytes at most.
data = spin.recv(self.SIZE)
# If data == '' then it is over.
if not data:
spawn(spin, CLOSE, '')
# Otherwise it arose data.
else:
spawn(spin, LOAD, data)
except socket.error as excpt:
# The excpt.args[0] contains the socket
# status.
err = excpt.args[0]
# If it is the case of the connection being closed
# we spawn CLOSE with the motive.
if err in CLOSE_ERR_CODE:
spawn(spin, CLOSE, err)
else:
# In case of error.
spawn(spin, RECV_ERR, err)
debug()
def lose(spin):
spin.destroy()
try:
spin.close()
except Exception as excpt:
err = excpt.args[0]
spawn(spin, CLOSE_ERR, err)
debug()
def lose(spin):
spin.destroy()
try:
spin.close()
except Exception as excpt:
err = excpt.args[0]
spawn(spin, CLOSE_ERR, err)
debug()
def update(self, device):
try:
data = self.queue.popleft()
device.write(data)
except IOError as excpt:
err = excpt.args[0]
spawn(device, CLOSE, err)
debug()
except IndexError:
# If the queue is empty we no more need
# the WRITE event.
zmap(device, WRITE, self.update)
# It is important to know when all data was
# fully sent. It spawns DUMPED when the queue
# is empty.
spawn(device, DUMPED)
def update(self, device):
try:
# It might happen of data having length lower than SIZE.
data = device.read(self.SIZE)
except IOError as excpt:
# When an exception occurs it deliveries the exception err.
# It as well spawns CLOSE.
err = excpt.args[0]
spawn(device, CLOSE, err)
# This is interesting so we can know what is going on.
debug()
else:
if not data: spawn(device, CLOSE, '')
# The event carrying the data.
# This is interesting sharing the LOAD event
# since we can use sub protocols for Stdout.
spawn(device, LOAD, data)
def update(self, spin):
"""
This method is called on WRITE to send data.
It attempts to optmize the job of sending bytes by using
buffer.
The algorithm is explained in the class doc.
Events: DUMPED, CLOSE, SEND_ERR
See help(Stdin).
"""
try:
if not self.data:
self.data = self.queue.popleft()
# As we are in non blocking mode a call to send
# doesn't block. We just need to know the amount
# of bytes sent.
size = spin.send(self.data)
# We move the pointer size bytes ahead.
self.data = buffer(self.data, size)
except socket.error as excpt:
err = excpt.args[0]
# The err value contains the socket status error code.
# It is passed with either CLOSE or SEND_ERR so
# users of this protocol can know what happened
# exactly with the call to send.
if err in CLOSE_ERR_CODE:
spawn(spin, CLOSE, err)
else:
spawn(spin, SEND_ERR, err)
debug()
except IndexError:
# If the queue is empty we no more need
# the WRITE event.
zmap(spin, WRITE, self.update)
# It is important to know when all data was
# fully sent. It spawns DUMPED when the queue
# is empty.
spawn(spin, DUMPED)
def update(self, device):
try:
data = self.queue.popleft()
device.write(data)
except IOError as excpt:
err = excpt.args[0]
spawn(device, CLOSE, err)
debug()
except IndexError:
# If the queue is empty we no more need
# the WRITE event.
zmap(device, WRITE, self.update)
# It is important to know when all data was
# fully sent. It spawns DUMPED when the queue
# is empty.
spawn(device, DUMPED)
def update(self, device):
try:
# It might happen of data having length lower than SIZE.
data = device.read(self.SIZE)
except IOError as excpt:
# When an exception occurs it deliveries the exception err.
# It as well spawns CLOSE.
err = excpt.args[0]
spawn(device, CLOSE, err)
# This is interesting so we can know what is going on.
debug()
else:
if not data: spawn(device, CLOSE, '')
# The event carrying the data.
# This is interesting sharing the LOAD event
# since we can use sub protocols for Stdout.
spawn(device, LOAD, data)
def update(self, spin):
"""
This method is called on WRITE to send data.
It attempts to optmize the job of sending bytes by using
buffer.
The algorithm is explained in the class doc.
Events: DUMPED, CLOSE, SEND_ERR
See help(Stdin).
"""
try:
if not self.data:
self.data = self.queue.popleft()
# As we are in non blocking mode a call to send
# doesn't block. We just need to know the amount
# of bytes sent.
size = spin.send(self.data)
# We move the pointer size bytes ahead.
self.data = buffer(self.data, size)
except socket.error as excpt:
err = excpt.args[0]
# The err value contains the socket status error code.
# It is passed with either CLOSE or SEND_ERR so
# users of this protocol can know what happened
# exactly with the call to send.
if err in CLOSE_ERR_CODE:
spawn(spin, CLOSE, err)
else:
spawn(spin, SEND_ERR, err)
debug()
except IndexError:
# If the queue is empty we no more need
# the WRITE event.
zmap(spin, WRITE, self.update)
# It is important to know when all data was
# fully sent. It spawns DUMPED when the queue
# is empty.
spawn(spin, DUMPED)
def update(self, spin):
# Calls repeatedly accept to improve efficience.
while True:
try:
sock, addr = spin.accept()
# Instantiate a new Spin and spreads it.
# Since it is connected is_on=True
new = Spin(sock)
spawn(spin, ACCEPT, new)
except socket.error as excpt:
# If there is no client accept throws
# an exception that is spreaded too.
err = excpt.args[0]
if not err in ACCEPT_ERR_CODE:
# It spawns ACCEPT_ERR just if the socket
# it isn't a peculiar set of conditions.
# As we are calling accpet inside a while
# we would have continously EAGAIN, EWOULDBLOCK etc.
spawn(spin, ACCEPT_ERR, err)
debug()
else:
break
def update(self, spin):
# Calls repeatedly accept to improve efficience.
while True:
try:
sock, addr = spin.accept()
# Instantiate a new Spin and spreads it.
# Since it is connected is_on=True
new = Spin(sock)
spawn(spin, ACCEPT, new)
except socket.error as excpt:
# If there is no client accept throws
# an exception that is spreaded too.
err = excpt.args[0]
if not err in ACCEPT_ERR_CODE:
# It spawns ACCEPT_ERR just if the socket
# it isn't a peculiar set of conditions.
# As we are calling accpet inside a while
# we would have continously EAGAIN, EWOULDBLOCK etc.
spawn(spin, ACCEPT_ERR, err)
debug()
else:
break
