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- """
- Generated by Statechart compiler by Glenn De Jonghe, Joeri Exelmans, Simon Van Mierlo, and Yentl Van Tendeloo (for the inspiration)
- Date: Fri Aug 25 15:48:04 2017
- Model author: Yentl Van Tendeloo
- Model name: HTTP client
- Model description:
- HTTP client.
- """
- from sccd.runtime.statecharts_core import *
- import uuid
- # package "HTTP client"
- class HTTPClient(RuntimeClassBase):
- def __init__(self, controller):
- RuntimeClassBase.__init__(self, controller)
-
- self.semantics.big_step_maximality = StatechartSemantics.TakeMany
- self.semantics.internal_event_lifeline = StatechartSemantics.Queue
- self.semantics.input_event_lifeline = StatechartSemantics.FirstComboStep
- self.semantics.priority = StatechartSemantics.SourceParent
- self.semantics.concurrency = StatechartSemantics.Single
-
- # build Statechart structure
- self.build_statechart_structure()
-
- # call user defined constructor
- HTTPClient.user_defined_constructor(self)
-
- def user_defined_constructor(self):
- self.socket = None
- self.received_data = ""
- self.send_data = ""
- self.queue = []
- self.IDs = []
-
- def user_defined_destructor(self):
- pass
-
-
- # builds Statechart structure
- def build_statechart_structure(self):
-
- # state <root>
- self.states[""] = State(0, "", self)
-
- # state /init
- self.states["/init"] = State(1, "/init", self)
- self.states["/init"].setEnter(self._init_enter)
-
- # state /waiting
- self.states["/waiting"] = State(2, "/waiting", self)
- self.states["/waiting"].setEnter(self._waiting_enter)
-
- # state /connecting
- self.states["/connecting"] = State(3, "/connecting", self)
- self.states["/connecting"].setEnter(self._connecting_enter)
- self.states["/connecting"].setExit(self._connecting_exit)
-
- # state /connecting/connecting
- self.states["/connecting/connecting"] = State(4, "/connecting/connecting", self)
- self.states["/connecting/connecting"].setEnter(self._connecting_connecting_enter)
-
- # state /connecting/cooldown
- self.states["/connecting/cooldown"] = State(5, "/connecting/cooldown", self)
- self.states["/connecting/cooldown"].setEnter(self._connecting_cooldown_enter)
- self.states["/connecting/cooldown"].setExit(self._connecting_cooldown_exit)
-
- # state /connected
- self.states["/connected"] = ParallelState(6, "/connected", self)
-
- # state /connected/listening
- self.states["/connected/listening"] = State(7, "/connected/listening", self)
-
- # state /connected/listening/listen
- self.states["/connected/listening/listen"] = State(8, "/connected/listening/listen", self)
- self.states["/connected/listening/listen"].setEnter(self._connected_listening_listen_enter)
-
- # state /connected/listening/close
- self.states["/connected/listening/close"] = State(9, "/connected/listening/close", self)
-
- # state /connected/sending
- self.states["/connected/sending"] = State(10, "/connected/sending", self)
-
- # state /connected/sending/waiting_for_data
- self.states["/connected/sending/waiting_for_data"] = State(11, "/connected/sending/waiting_for_data", self)
-
- # state /connected/sending/transferring
- self.states["/connected/sending/transferring"] = State(12, "/connected/sending/transferring", self)
-
- # state /connected/queueing
- self.states["/connected/queueing"] = State(13, "/connected/queueing", self)
-
- # state /connected/queueing/queueing
- self.states["/connected/queueing/queueing"] = State(14, "/connected/queueing/queueing", self)
- self.states["/connected/queueing/queueing"].setEnter(self._connected_queueing_queueing_enter)
-
- # state /connected/parsing
- self.states["/connected/parsing"] = State(15, "/connected/parsing", self)
-
- # state /connected/parsing/wait_for_header
- self.states["/connected/parsing/wait_for_header"] = State(16, "/connected/parsing/wait_for_header", self)
-
- # state /connected/parsing/wait_for_payload
- self.states["/connected/parsing/wait_for_payload"] = State(17, "/connected/parsing/wait_for_payload", self)
-
- # add children
- self.states[""].addChild(self.states["/init"])
- self.states[""].addChild(self.states["/waiting"])
- self.states[""].addChild(self.states["/connecting"])
- self.states[""].addChild(self.states["/connected"])
- self.states["/connecting"].addChild(self.states["/connecting/connecting"])
- self.states["/connecting"].addChild(self.states["/connecting/cooldown"])
- self.states["/connected"].addChild(self.states["/connected/listening"])
- self.states["/connected"].addChild(self.states["/connected/sending"])
- self.states["/connected"].addChild(self.states["/connected/queueing"])
- self.states["/connected"].addChild(self.states["/connected/parsing"])
- self.states["/connected/listening"].addChild(self.states["/connected/listening/listen"])
- self.states["/connected/listening"].addChild(self.states["/connected/listening/close"])
- self.states["/connected/sending"].addChild(self.states["/connected/sending/waiting_for_data"])
- self.states["/connected/sending"].addChild(self.states["/connected/sending/transferring"])
- self.states["/connected/queueing"].addChild(self.states["/connected/queueing/queueing"])
- self.states["/connected/parsing"].addChild(self.states["/connected/parsing/wait_for_header"])
- self.states["/connected/parsing"].addChild(self.states["/connected/parsing/wait_for_payload"])
- self.states[""].fixTree()
- self.states[""].default_state = self.states["/init"]
- self.states["/connecting"].default_state = self.states["/connecting/connecting"]
- self.states["/connected/listening"].default_state = self.states["/connected/listening/listen"]
- self.states["/connected/sending"].default_state = self.states["/connected/sending/waiting_for_data"]
- self.states["/connected/queueing"].default_state = self.states["/connected/queueing/queueing"]
- self.states["/connected/parsing"].default_state = self.states["/connected/parsing/wait_for_header"]
-
- # transition /init
- _init_0 = Transition(self, self.states["/init"], [self.states["/waiting"]])
- _init_0.setAction(self._init_0_exec)
- _init_0.setTrigger(Event("created_socket", "socket_in"))
- _init_0.setGuard(self._init_0_guard)
- self.states["/init"].addTransition(_init_0)
-
- # transition /waiting
- _waiting_0 = Transition(self, self.states["/waiting"], [self.states["/connecting"]])
- _waiting_0.setAction(self._waiting_0_exec)
- _waiting_0.setTrigger(Event("connect", "request_in"))
- self.states["/waiting"].addTransition(_waiting_0)
-
- # transition /connecting/connecting
- _connecting_connecting_0 = Transition(self, self.states["/connecting/connecting"], [self.states["/connecting/cooldown"]])
- _connecting_connecting_0.setTrigger(Event("error_socket", "socket_in"))
- self.states["/connecting/connecting"].addTransition(_connecting_connecting_0)
- _connecting_connecting_1 = Transition(self, self.states["/connecting/connecting"], [self.states["/connected"]])
- _connecting_connecting_1.setAction(self._connecting_connecting_1_exec)
- _connecting_connecting_1.setTrigger(Event("connected_socket", "socket_in"))
- _connecting_connecting_1.setGuard(self._connecting_connecting_1_guard)
- self.states["/connecting/connecting"].addTransition(_connecting_connecting_1)
-
- # transition /connecting/cooldown
- _connecting_cooldown_0 = Transition(self, self.states["/connecting/cooldown"], [self.states["/connecting/connecting"]])
- _connecting_cooldown_0.setTrigger(Event("_1after"))
- self.states["/connecting/cooldown"].addTransition(_connecting_cooldown_0)
-
- # transition /connected/listening/listen
- _connected_listening_listen_0 = Transition(self, self.states["/connected/listening/listen"], [self.states["/connected/listening/listen"]])
- _connected_listening_listen_0.setAction(self._connected_listening_listen_0_exec)
- _connected_listening_listen_0.setTrigger(Event("received_socket", "socket_in"))
- _connected_listening_listen_0.setGuard(self._connected_listening_listen_0_guard)
- self.states["/connected/listening/listen"].addTransition(_connected_listening_listen_0)
- _connected_listening_listen_1 = Transition(self, self.states["/connected/listening/listen"], [self.states["/connected/listening/close"]])
- _connected_listening_listen_1.setTrigger(Event("received_socket", "socket_in"))
- _connected_listening_listen_1.setGuard(self._connected_listening_listen_1_guard)
- self.states["/connected/listening/listen"].addTransition(_connected_listening_listen_1)
-
- # transition /connected/sending/waiting_for_data
- _connected_sending_waiting_for_data_0 = Transition(self, self.states["/connected/sending/waiting_for_data"], [self.states["/connected/sending/transferring"]])
- _connected_sending_waiting_for_data_0.setAction(self._connected_sending_waiting_for_data_0_exec)
- _connected_sending_waiting_for_data_0.setTrigger(None)
- _connected_sending_waiting_for_data_0.setGuard(self._connected_sending_waiting_for_data_0_guard)
- self.states["/connected/sending/waiting_for_data"].addTransition(_connected_sending_waiting_for_data_0)
-
- # transition /connected/sending/transferring
- _connected_sending_transferring_0 = Transition(self, self.states["/connected/sending/transferring"], [self.states["/connected/sending/waiting_for_data"]])
- _connected_sending_transferring_0.setAction(self._connected_sending_transferring_0_exec)
- _connected_sending_transferring_0.setTrigger(Event("sent_socket", "socket_in"))
- _connected_sending_transferring_0.setGuard(self._connected_sending_transferring_0_guard)
- self.states["/connected/sending/transferring"].addTransition(_connected_sending_transferring_0)
-
- # transition /connected/queueing/queueing
- _connected_queueing_queueing_0 = Transition(self, self.states["/connected/queueing/queueing"], [self.states["/connected/queueing/queueing"]])
- _connected_queueing_queueing_0.setAction(self._connected_queueing_queueing_0_exec)
- _connected_queueing_queueing_0.setTrigger(Event("HTTP_input", "request_in"))
- self.states["/connected/queueing/queueing"].addTransition(_connected_queueing_queueing_0)
-
- # transition /connected/parsing/wait_for_header
- _connected_parsing_wait_for_header_0 = Transition(self, self.states["/connected/parsing/wait_for_header"], [self.states["/connected/parsing/wait_for_payload"]])
- _connected_parsing_wait_for_header_0.setAction(self._connected_parsing_wait_for_header_0_exec)
- _connected_parsing_wait_for_header_0.setTrigger(None)
- _connected_parsing_wait_for_header_0.setGuard(self._connected_parsing_wait_for_header_0_guard)
- self.states["/connected/parsing/wait_for_header"].addTransition(_connected_parsing_wait_for_header_0)
-
- # transition /connected/parsing/wait_for_payload
- _connected_parsing_wait_for_payload_0 = Transition(self, self.states["/connected/parsing/wait_for_payload"], [self.states["/connected/parsing/wait_for_header"]])
- _connected_parsing_wait_for_payload_0.setAction(self._connected_parsing_wait_for_payload_0_exec)
- _connected_parsing_wait_for_payload_0.setTrigger(None)
- _connected_parsing_wait_for_payload_0.setGuard(self._connected_parsing_wait_for_payload_0_guard)
- self.states["/connected/parsing/wait_for_payload"].addTransition(_connected_parsing_wait_for_payload_0)
- _connected_parsing_wait_for_payload_1 = Transition(self, self.states["/connected/parsing/wait_for_payload"], [self.states["/connected/parsing/wait_for_header"]])
- _connected_parsing_wait_for_payload_1.setAction(self._connected_parsing_wait_for_payload_1_exec)
- _connected_parsing_wait_for_payload_1.setTrigger(None)
- _connected_parsing_wait_for_payload_1.setGuard(self._connected_parsing_wait_for_payload_1_guard)
- self.states["/connected/parsing/wait_for_payload"].addTransition(_connected_parsing_wait_for_payload_1)
-
- # transition /connecting
- _connecting_0 = Transition(self, self.states["/connecting"], [self.states["/waiting"]])
- _connecting_0.setAction(self._connecting_0_exec)
- _connecting_0.setTrigger(Event("_0after"))
- self.states["/connecting"].addTransition(_connecting_0)
-
- def _connecting_enter(self):
- self.addTimer(0, self.timeout)
-
- def _connecting_exit(self):
- self.removeTimer(0)
-
- def _init_enter(self):
- self.ID = str(uuid.uuid4())
- self.big_step.outputEvent(Event("create_socket", "socket_out", [self.ID]))
-
- def _waiting_enter(self):
- self.big_step.outputEvent(Event("http_client_initialized", "request_out", []))
-
- def _connecting_connecting_enter(self):
- self.big_step.outputEvent(Event("connect_socket", "socket_out", [self.socket, self.address]))
-
- def _connecting_cooldown_enter(self):
- self.addTimer(1, 0.1)
-
- def _connecting_cooldown_exit(self):
- self.removeTimer(1)
-
- def _connected_listening_listen_enter(self):
- self.big_step.outputEvent(Event("recv_socket", "socket_out", [self.socket]))
-
- def _connected_queueing_queueing_enter(self):
- pass
-
- def _connecting_0_exec(self, parameters):
- self.big_step.outputEvent(Event("http_client_timeout", "request_out", []))
-
- def _init_0_exec(self, parameters):
- socket = parameters[0]
- ID = parameters[1]
- self.socket = socket
-
- def _init_0_guard(self, parameters):
- socket = parameters[0]
- ID = parameters[1]
- return self.ID == ID
-
- def _waiting_0_exec(self, parameters):
- address = parameters[0]
- timeout = parameters[1]
- self.address = address
- self.timeout = timeout
-
- def _connecting_connecting_1_exec(self, parameters):
- socket = parameters[0]
- self.big_step.outputEvent(Event("http_client_ready", "request_out", []))
-
- def _connecting_connecting_1_guard(self, parameters):
- socket = parameters[0]
- return self.socket == socket
-
- def _connected_listening_listen_0_exec(self, parameters):
- socket = parameters[0]
- data = parameters[1]
- self.received_data += data
-
- def _connected_listening_listen_0_guard(self, parameters):
- socket = parameters[0]
- data = parameters[1]
- return (self.socket == socket) and (len(data) > 0)
-
- def _connected_listening_listen_1_guard(self, parameters):
- socket = parameters[0]
- data = parameters[1]
- return (self.socket == socket) and (len(data) == 0)
-
- def _connected_sending_waiting_for_data_0_exec(self, parameters):
- self.big_step.outputEvent(Event("send_socket", "socket_out", [self.socket, self.send_data]))
-
- def _connected_sending_waiting_for_data_0_guard(self, parameters):
- return len(self.send_data) > 0
-
- def _connected_sending_transferring_0_exec(self, parameters):
- socket = parameters[0]
- sent_bytes = parameters[1]
- self.send_data = self.send_data[sent_bytes:]
-
- def _connected_sending_transferring_0_guard(self, parameters):
- socket = parameters[0]
- sent_bytes = parameters[1]
- return self.socket == socket
-
- def _connected_queueing_queueing_0_exec(self, parameters):
- data = parameters[0]
- ID = parameters[1]
- self.send_data += "POST / HTTP/1.0\r\n"
- self.send_data += "Content-Length: %i\r\n" % len(str(data))
- self.send_data += "\r\n"
- self.send_data += data
- self.IDs.append(ID)
-
- def _connected_parsing_wait_for_header_0_exec(self, parameters):
- header, self.received_data = self.received_data.split("\r\n\r\n", 1)
- header = header.lower()
- if "content-length" in header:
- _, after = header.split("content-length:", 1)
- after, _ = after.split("\r\n", 1)
- after = after.strip()
- self.length = int(after)
- else:
- self.length = float('inf')
-
- def _connected_parsing_wait_for_header_0_guard(self, parameters):
- return '\r\n\r\n' in self.received_data
-
- def _connected_parsing_wait_for_payload_0_exec(self, parameters):
- data = self.received_data[:self.length]
- self.received_data = self.received_data[self.length:]
- self.big_step.outputEvent(Event("HTTP_output", "request_out", [data, self.IDs.pop(0)]))
-
- def _connected_parsing_wait_for_payload_0_guard(self, parameters):
- return len(self.received_data) >= self.length and self.IDs[0] is not None
-
- def _connected_parsing_wait_for_payload_1_exec(self, parameters):
- # Drop data
- self.received_data = self.received_data[self.length:]
- self.IDs.pop(0)
-
- def _connected_parsing_wait_for_payload_1_guard(self, parameters):
- return len(self.received_data) >= self.length and self.IDs[0] is None
-
- def initializeStatechart(self):
- # enter default state
- self.default_targets = self.states["/init"].getEffectiveTargetStates()
- RuntimeClassBase.initializeStatechart(self)
- class ObjectManager(ObjectManagerBase):
- def __init__(self, controller):
- ObjectManagerBase.__init__(self, controller)
-
- def instantiate(self, class_name, construct_params):
- if class_name == "HTTPClient":
- instance = HTTPClient(self.controller)
- instance.associations = {}
- else:
- raise Exception("Cannot instantiate class " + class_name)
- return instance
- class Controller(ThreadsControllerBase):
- def __init__(self, keep_running = None, behind_schedule_callback = None):
- if keep_running == None: keep_running = True
- if behind_schedule_callback == None: behind_schedule_callback = None
- ThreadsControllerBase.__init__(self, ObjectManager(self), keep_running, behind_schedule_callback)
- self.addInputPort("socket_in")
- self.addInputPort("request_in")
- self.addOutputPort("socket_out")
- self.addOutputPort("request_out")
- self.object_manager.createInstance("HTTPClient", [])
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