def extract_tas_action_result(reg_object):
action_line = reg_object.group(4)
action_reg_object = re.match("(\S+)/(\d+)", action_line)
if (action_reg_object):
action = action_reg_object.group(1)
message_id = None
if (action == "plays"):
message_id = tas_command_type.RESULT_PLAY
elif (action == "says"):
message_id = tas_command_type.RESULT_SAY
elif (action == "collects"):
message_id = tas_command_type.RESULT_COLLECT
else:
logging.error(
"Unkown result action from TAS is detected '%s'.", action)
return None
return {
struct_field.id: message_id,
struct_field.account_id: reg_object.group(1),
struct_field.script_id: reg_object.group(2),
struct_field.session_id: reg_object.group(3),
struct_field.action_id: action_reg_object.group(2)
}
else:
logging.error(
"Unkown result action format from TAS is detected '%s'.",
action)
return None
def __get_failure_descriptor(section, key):
failure = [None, None]
success = True
if (configuration.get_failure_mode_enable() is True):
failure_descriptor = configuration.__get_section(
section)[key].lstrip().rstrip()
failure = failure_descriptor.split()
if (len(failure) == 2):
try:
failure[0] = int(failure[0])
except:
success = False
elif (len(failure) == 1):
try:
failure[0] = int(failure[0])
failure.append("")
except:
success = False
else:
success = False
if (success is not True):
logging.error("Impossible to extract failure descriptor '%s'.",
failure_descriptor)
return failure
def __get_integer(section, key):
try:
return int(configuration.__get_section(section)[key])
except:
logging.error("Impossible extract integer value '%s'.",
configuration.__get_section(section)[key])
return None
def get_variable(self, name):
if (name not in self.__variables):
logging.error(
"Impossible to get value of variable '%s' because it does not exist.",
name)
return None
return self.__variables[name]
def load():
if (os.path.isfile(configuration.__configuration_filename) is False):
logging.error("Impossible to find configuration file.")
return os._exit(error_code.ERROR_CONFIGURATION_NOT_FOUND)
configuration.__configuration_instance = ConfigParser.ConfigParser()
configuration.__configuration_instance.read(
configuration.__configuration_filename)
return True
def evaluate(self):
(variables_names, variables_values) = self.__extract_variables();
for index_variable in range(len(variables_names)):
internal_variable_name = "variables_values[" + str(index_variable) + "]";
self.__expression = self.__expression.replace(variables_names[index_variable], internal_variable_name);
result = None;
try: result = eval(self.__expression);
except: logging.error("Impossible to evaluate expression '%s'.", self.__expression);
return result;
def load(script_id):
script_filepath = os.path.join(script.__DEFAULT_FOLDER, script_id);
if (script_filepath is False):
logging.error("Impossible to load script because it does not exist.");
os._exit(error_code.ERROR_SCRIPT_NOT_FOUND);
with open(script_filepath) as file_descriptor:
content = file_descriptor.readlines();
block = code_block(0, content);
block.load();
return block;
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 __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 parse(method, path):
if (method == http_method.HTTP_POST):
reg_object = re.match(
"/telephony/v1/account/(\d+)/distribution-services/ivrs/(\d+)/instances$",
path)
if (reg_object):
return http_parser.extract_ivr_start_request(reg_object)
reg_object = re.match(
"/telephony/v1/account/(\d+)/distribution-services/ivrs/(\d+)/instances/(\d+)/actions/(.*)",
path)
if (reg_object):
return http_parser.extract_tas_action_result(reg_object)
elif (method == http_method.HTTP_DELETE):
reg_object = re.match(
"/telephony/v1/account/(\d+)/distribution-services/ivrs/(\d+)/instances/(\d+)",
path)
if (reg_object):
return http_parser.extract_ivr_stop_request(reg_object)
elif (method == http_method.HTTP_GET):
reg_object = re.match(
"/telephony/v1/account/(\d+)/distribution-services/ivrs/(\d+)/instances/(\d+)",
path)
if (reg_object):
return http_parser.extract_ivr_execution_status(reg_object)
reg_object = re.match(
"/telephony/v1/account/(\d+)/distribution-services/status(.*)",
path)
if (reg_object):
return http_parser.extract_ivr_service_status(reg_object)
else:
logging.error("HTTP method '%s' is not supported.", method)
return None
def __extract_variables(self):
variables_names = [];
variables_values = [];
start_variable = self.__expression.find("$(", 0)
while (start_variable >= 0):
stop_variable = self.__expression.find(")", start_variable + 1);
if (stop_variable < 0):
logging.error("Impossible to parse expression with variable - incorrect format of variables (expression: '%s').", self.__expression);
break;
# extract variable name
variable_name = self.__expression[start_variable : stop_variable + 1];
if (variable_name not in self.__context.get_variables()):
logging.error("Impossible to find variable '%s' because of not declaration (expression: '%s').", variable_name, self.__expression);
break;
if (variable_name not in variables_names):
variables_names.append(variable_name);
variables_values.append(self.__context.get_variable(variable_name));
start_variable = self.__expression.find("$(", stop_variable);
return (variables_names, variables_values);
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 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
