def __init__(self, socket):
"""Construct an instance.
See the class description for details about the socket object.
"""
self._socket = socket
self._builder = EngineResponseBuilder()
class Connection(object):
"""Manage a socket-based connection to a debugger engine.
The socket object managed by this class is expected to be an instance of a
class that wraps a socket object from socket module. The wrapper class
needs to provide the following methods:
is_data_available -- Can data be read from the socket without blocking?
recv -- Equivalent to the socket recv method.
send_all -- Equivalent to the socket sendall method.
"""
def __init__(self, socket):
"""Construct an instance.
See the class description for details about the socket object.
"""
self._socket = socket
self._builder = EngineResponseBuilder()
@property
def socket(self):
"""Return the socket object."""
return self._socket
def send_command(self, command, arguments=[], data=None):
"""Send an ide command to a debugger engine.
The command parameter can be an IdeCommand class instance, in which
case the arguments and data parameters are ignored.
"""
if isinstance(command, IdeCommand):
command_obj = command
else:
command_obj = IdeCommand(command, arguments, data)
self._socket.send_all(command_obj.build())
return command_obj
def recv_response(self):
"""Receive a response from a debugger engine.
The return value is an EngineResponse object or an instance of a
subclass of EngineResponse. If a response is not yet available, None
is returned.
"""
if not self._socket.is_data_available():
return None
while self._socket.is_data_available():
data = self._socket.recv(self._builder.request_amount)
if data == '':
raise ConnectionClosed("connection closed by debugger engine")
self._builder.add_data(data)
response = self._builder.get_response()
if response != None:
return response
return None
def recv_response_blocking(self):
"""Receive a response from a debugger engine.
The return value is an EngineResponse object or an instance of a
subclass of EngineResponse. Unlike recv_response, this method blocks
until an entire response is available.
"""
while True:
data = self._socket.recv(self._builder.request_amount)
if data == '':
raise ConnectionClosed("connection closed by debugger engine")
self._builder.add_data(data)
response = self._builder.get_response()
if response != None:
return response
def close(self):
self._socket.close()
