def __init__(self, script_id, tas_request):
self.__script_id = script_id
self.__tas_info = tas_request
self.__action_id = None
self.__play_id = None
self.__say_id = None
self.__collect_id = None
self.__session_id = session_context.__generate_session_id()
self.__cursor = 0
self.__variables = {}
block = script.load(script_id)
self.__actions = block.get_commands()
self.__triggers = block.get_triggers()
self.__functions = block.get_functions()
self.__last_input_message = None
if (len(self.__actions) == 0):
logging.warning(
"Script-file (script id: '%s') does not have any actions for TAS.",
script_id)
logging.debug(
"IVR context is generated (session id: '%s', script id: '%s').",
self.__session_id, self.__script_id)
logging.debug(
"IVR script '%s' info (commands: '%d', triggers: '%d', functions: '%d').",
self.__script_id, len(self.__actions), len(self.__triggers),
len(self.__functions))
def exist(session_id):
with session_manager.__resource_locker:
logging.debug("Amount of sessions '%d' (search session id '%s').",
len(session_manager.__sessions), session_id)
if (session_id in session_manager.__sessions):
return True
return False
def notify(session_id, tas_notification_id, message_payload):
with session_manager.__resource_locker:
if (session_manager.exist(session_id)):
logging.debug(
"Convey notifiction to session instance (session id: '%s', sessions '%d').",
session_id, len(session_manager.__sessions))
return session_manager.__sessions[session_id].notify(
tas_notification_id, message_payload)
return None
def delete(session_id, internal=False):
reply_code = None
with session_manager.__resource_locker:
if (internal is False):
reply_code = session_manager.__sessions[session_id].stop()
if (session_manager.exist(session_id)):
session_manager.__sessions.pop(session_id)
logging.debug(
"Delete session instance (session id: '%s', sessions '%d').",
session_id, len(session_manager.__sessions))
return reply_code
def send_request(self, http_method, http_link, json_request):
response_status = 404
response_body = None
connection = httplib.HTTPConnection(self.__address,
self.__port,
timeout=1)
try:
logging.debug("Send HTTP request to TAS (%s:%s): '%s' '%s'.",
self.__address, self.__port, http_method, http_link)
logging.debug("JSON payload of the HTTP request to TAS: '%s'.",
json_request)
headers = {
'Content-Type': 'application/json'
}
body = None
if (json_request is not None):
body = json_request.encode("utf-8")
headers['Content-Length'] = len(body)
statistical.inc_ivr_requests()
connection.request(http_method, http_link, body, headers)
logging.debug("Check for HTTP response from TAS.")
response = connection.getresponse()
response_status = response.status
logging.debug("Read body of the HTTP response from TAS.")
response_body = response.read()
statistical.inc_ivr_responses()
logging.debug("HTTP response (code: %d) from TAS:\n%s",
response_status, response_body)
except:
response_status = 404
logging.error(
"Impossible to communicate correctly with TAS using HTTP.")
finally:
connection.close()
return (response_status, response_body)
def __process_wait_command(self, expected_response):
logging.debug("(IVR session '%s') wait for TAS callback command (response: '%s')...", self.__context.get_id(), expected_response);
while(self.__active is True):
response = "";
with self.__tas_response_condition:
while (len(self.__tas_responses) == 0 and self.__active is True):
self.__tas_response_condition.wait();
if (len(self.__tas_responses) > 0):
response = self.__tas_responses.pop();
if (response != expected_response):
logging.warning("(IVR session '%s') unexpected response is received from TAS: '%s' (but expected: '%s'), continue to wait.", self.__context.get_id(), response, expected_response);
continue;
else:
logging.debug("(IVR session '%s') expected response is received '%s', stop waiting process.", self.__context.get_id(), response);
break;
def __run(self):
logging.debug("(IVR session '%s') session '%s' is started at '%s'.", self.__context.get_id(), self.__context.get_id(), time.ctime());
with self.__code_block_locker:
command_container = self.__context.get_next_command();
while( (self.__active is True) and (command_container is not None) ):
(command, arguments) = command_container;
if (command == command_type.COMMAND_SEND):
self.__process_send_command(arguments[0], arguments[1], arguments[2]);
elif (command == command_type.COMMAND_TIMEOUT):
self.__process_timeout_command(arguments[0]);
elif (command == command_type.COMMAND_WAIT):
self.__process_wait_command(arguments[0]);
elif (command == command_type.COMMAND_PRINT):
self.__process_print_comand(arguments[0]);
elif (command == command_type.COMMAND_EXIT):
logging.info("(IVR session '%s') exit command is detected - termination...", self.__context.get_id());
self.__active = False;
elif (command == command_type.COMMAND_MOVE_JSON):
self.__process_move_json(arguments[0]);
elif (command == command_type.COMMAND_IF):
self.__process_conditional_block(arguments[0], arguments[1]);
else:
logging.error("(IVR session '%s') unexpected command is detected...", self.__context.get_id());
with self.__code_block_locker:
command_container = self.__context.get_next_command();
self.__manager.delete(self.__context.get_id(), internal = True);
logging.info("(IVR session '%s') session is terminated at '%s'.", self.__context.get_id(), time.ctime());
def __process_send_command(self, method, tas_content, arguments):
logging.debug("(IVR session '%s') command SEND is executing...", self.__context.get_id());
tas_link = None;
tas_method = None;
if (method == "SAY"):
tas_link = self.__context.get_tas_link_say();
tas_method = "POST";
elif (method == "STOP_SAY"):
tas_link = self.__context.get_tas_link_stop_say();
tas_method = "DELETE";
elif (method == "PLAY"):
tas_link = self.__context.get_tas_link_play();
tas_method = "POST";
elif (method == "STOP_PLAY"):
tas_link = self.__context.get_tas_link_stop_play();
tas_method = "DELETE";
elif (method == "COLLECT"):
tas_link = self.__context.get_tas_link_collect();
tas_method = "POST";
elif (method == "STOP_COLLECT"):
tas_link = self.__context.get_tas_link_stop_collect();
tas_method = "DELETE";
elif (method == "FORWARD"):
tas_link = self.__context.get_tas_link_forward();
tas_method = "PUT";
elif (method == "EXCEPTION"):
tas_link = self.__context.get_tas_link_exception();
tas_method = "PUT";
if (len(arguments) > 0):
tas_link_pattern = arguments[0];
tas_link = self.__change_tas_link(tas_link, tas_link_pattern);
tas_content = self.__translate_content(tas_content);
logging.info("(IVR session '%s') send command request to TAS ('%s', '%s').", self.__context.get_id(), tas_method, method);
(status, json_response) = self.__send(tas_method, tas_link, tas_content);
if ( (status >= 200) and (status <= 299) ):
if (tas_method == "POST"):
response = json.loads(json_response);
if (response.get("id", None) == None):
logging.error("(IVR session '%s') TAS reply to '%s' command '%s' without JSON body with 'id' key.", self.__context.get_id(), tas_method, method);
else:
action_id = response['id'];
if (method == "SAY"): self.__context.set_say_id(action_id);
elif (method == "PLAY"): self.__context.set_play_id(action_id);
elif (method == "COLLECT"): self.__context.set_collect_id(action_id);
logging.info("(IVR session '%s') TAS accepts '%s' command '%s' and return action id: '%s'.", self.__context.get_id(), tas_method, method, action_id)
else:
logging.warning("(IVR session '%s') TAS reply to '%s' command '%s' by failure status (code: '%d').", self.__context.get_id(), tas_method, method, status);
def __process_timeout_command(self, timeout):
logging.debug("(IVR session '%s') command TIMEOUT is executing (time: '%d')...", self.__context.get_id(), timeout);
time.sleep(timeout / 1000.0);
def do_POST(self):
tas_host, tas_port = self.client_address[:2]
logging.info(
"Receive HTTP POST request from TAS: '%s' (address: '%s:%s').",
self.path, tas_host, tas_port)
request = http_parser.parse(http_method.HTTP_POST, self.path)
if (request == None):
self.__send_response(http_code.HTTP_BAD_REQUEST,
"\"Impossible to parse POST request.\"")
return
#
# TAS_IVR_START_REQ
#
if (request[struct_field.id] == tas_command_type.IVR_START):
if (configuration.get_failure_start_ivr_code() is not None):
self.__send_response(
configuration.get_failure_start_ivr_code(), None,
configuration.get_failure_start_ivr_message())
return
# extract TAS request for session and attach additional information
json_request = self.rfile.read(int(self.headers['Content-Length']))
tas_request = json.loads(json_request)
tas_request["tas_address"] = {
"ip": tas_host,
"port": tas_port
}
tas_request["account_id"] = request[struct_field.account_id]
session_id = self.__get_session_manager().create(
request[struct_field.script_id], tas_request)
if (session_id is None):
self.__send_response(
http_code.HTTP_NOT_FOUND,
"\"Session '" + str(session_id) + "' is not found.\"")
return
json_response = json_builder.start_ivr_response(session_id)
self.__send_response(http_code.HTTP_OK_CREATED, json_response)
self.__get_session_manager().launch(session_id)
#
# RESULT_ACTION
#
elif (request[struct_field.id] == tas_command_type.RESULT_COLLECT
or request[struct_field.id] == tas_command_type.RESULT_PLAY
or request[struct_field.id] == tas_command_type.RESULT_SAY):
if (configuration.get_failure_action_result_code() is not None):
self.__send_response(
configuration.get_failure_action_result_code(), None,
configuration.get_failure_action_result_message())
return
session_id = request[struct_field.session_id]
message_id = request[struct_field.id]
# script_id = request[struct_field.script_id];
json_result = self.rfile.read(int(self.headers['Content-Length']))
logging.info("Callback action result is received (id: '%d').",
request[struct_field.id])
logging.debug("Content of the callback result:\n%s", json_result)
# it is represented by map because most probably other staff may be conveyed to session.
json_instance = None
try:
json_instance = json.loads(json_result)
except:
logging.error(
"Impossible to parse JSON - corrupted JSON payload is received."
)
self.__send_response(
http_code.HTTP_BAD_REQUEST,
"\"Corrupted JSON payload in POST request.\"")
return
message_playload = {
'json': json_instance
}
if (self.__get_session_manager().exist(session_id)):
reply_code = self.__get_session_manager().notify(
session_id, message_id, message_playload)
reply_message = None
if (reply_code is None):
reply_code = http_code.HTTP_OK
reply_message = "\"Success.\""
else:
reply_message = "\"Specified reply code is used.\""
self.__send_response(reply_code, reply_message)
return
self.__send_response(
http_code.HTTP_NOT_FOUND,
"\"Session '" + str(session_id) + "' is not found.\"")
else:
self.__send_response(
http_code.HTTP_BAD_REQUEST, "\"Unknown POST type command '" +
str(request[struct_field.id]) + "'.\"")
return