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 __run(self):
logging.debug("(Q Service 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], arguments[3])
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_REPLY:
self.__process_reply_command(arguments[0], arguments[1], arguments[2], arguments[3])
elif command == command_type.COMMAND_IGNORE:
self.__process_ignore_command()
elif command == command_type.COMMAND_ASK:
self.__process_ask_command(arguments[0])
elif command == command_type.COMMAND_ASSIGN:
self.__process_assign_command(arguments[0], arguments[1])
elif command == command_type.COMMAND_PRINT:
self.__process_print_comand(arguments[0])
elif command == command_type.COMMAND_EXIT:
logging.info("(QSim Service task '%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("(QSim Service task '%s') unexpected command is detected...", self.__context.get_id())
self.__previous_command = command
with self.__code_block_locker:
command_container = self.__context.get_next_command()
self.__manager.delete(self.__context.get_id())
logging.info("(QSim Service task '%s') session is terminated at '%s'.", self.__context.get_id(), time.ctime())
def __assign_variable_value(self, variable_name, variable_value):
if variable_name not in {"SESSION_ID", "PARTY_ID", "RCACCOUNT_ID", "RCEXTENSION_ID"}:
logging.error("(QSim Service task '%s') Variable '%s' is not supported.", self.__context.get_id(), variable_name)
return
if variable_name == "SESSION_ID":
self.__context.set_session_id(variable_value)
elif variable_name == "PARTY_ID":
self.__context.set_party_id(variable_value)
elif variable_name == "RCACCOUNT_ID":
self.__context.set_rcaccount_id(variable_value)
elif variable_name == "RCEXTENSION_ID":
self.__context.set_rcextension_id(variable_value)
def __process_command_content(self):
if self.__content_flag is not True:
logging.error("Incorrect script-file format in line '%s' (%d).", self.__line_counter, self.__line)
sys.exit(error_code.ERROR_SCRIPT_INCORRECT_FORMAT)
reg_object = re.match("HEADER (.*) (.*)", self.__line)
if reg_object:
key = reg_object.group(1).rstrip().lstrip()
value = reg_object.group(2).rstrip().lstrip()
self.__command_headers[key] = value
else:
self.__command_content += self.__line
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.")
sys.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 __process_command_else(self, command):
if self.__command_sequence[len(self.__command_sequence) - 1][0] != command_type.COMMAND_IF:
if self.__subfunction == code_block_type.CODE_BLOCK_MAIN:
logging.error("Unexpected keyword '%s' (else branch of conditional block) without conditional block in line '%s' (%d).", command, self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_INCORRECT_FORMAT)
# go to upper level to process it without shifting line (we still need to process else keyword)
self.__line_counter = self.__line_counter - 1
return False
else:
block = code_block(self.__line_counter, self.__content, code_block_type.CODE_BLOCK_CONDITION)
block.load()
self.__line_counter = block.get_cursor()
self.__command_sequence.append((command, [block.get_commands()]))
return True
def send_request(self, http_method, http_link, json_request, general_headers):
response_body = None
connection = http.client.HTTPConnection(self.__address, self.__port, timeout=1)
try:
logging.vip("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",
"Accept": "*/*"}
body = None
if json_request is not None:
body = json_request.encode("utf-8")
headers['Content-Length'] = len(body)
headers.update(general_headers)
statistical.inc_qsim_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_qsim_responses()
logging.vip("HTTP response (code: %d) from TAS:", response_status)
logging.debug(response_body.decode("utf-8"))
except Exception as expection_object:
response_status = 600
logging.error("Impossible to communicate correctly with TAS using HTTP (reason: '%s')." % expection_object)
finally:
connection.close()
return response_status, response_body
def __process_command_trigger(self, command, argument):
if self.__subfunction != code_block_type.CODE_BLOCK_MAIN:
logging.error("Unexpected keyword '%s' (start trigger) in sub-block in line '%s' (%d).", command, self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_INCORRECT_FORMAT)
if argument in self.__triggers:
logging.error("Trigger redefinition (trigger for '%s' is already defined) in line '%s' (%d).", argument, self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_INCORRECT_FORMAT)
# extract code block
block = code_block(self.__line_counter, self.__content, code_block_type.CODE_BLOCK_TRIGGER)
block.load()
self.__line_counter = block.get_cursor()
# extract arguments
command_line_arguments = argument.split()
if len(command_line_arguments) == 1:
trigger_message_id, trigger_reply_code = command_line_arguments[0], None
elif len(command_line_arguments) == 2:
trigger_message_id, trigger_reply_code = command_line_arguments[0], command_line_arguments[1]
else:
logging.error("Invalid number of arguments of '%d' in line '%s' (%d).", len(command_line_arguments), self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_AMOUNT_ARGUMENTS)
if trigger_reply_code is not None:
trigger_reply_code = int(trigger_reply_code)
# create and store trigger
self.__triggers[trigger_message_id] = trigger(trigger_message_id, block.get_commands(), trigger_reply_code)
return True
def __process_reply_command(self, code, message, json_body, headers):
logging.debug("(QSim Service task '%s') command REPLY is executing...", self.__context.get_id())
previous_message = self.__context.get_last_input_message()[0]
if previous_message is None:
logging.error("(QSim Service task '%s') impossible to reply, nothing was received.", self.__context.get_id())
return
if previous_message == tas_command_type.TASK_START:
if (json_body is None) or (len(json_body) == 0):
json_body = json_builder.start_qsim_response(self.__context.get_id())
event = event_start_response(code, message, headers, json_body)
else:
event = event_response(code, message, headers, json_body)
queue.put(event)
logging.debug("(QSim Service task '%s') Send event response to '%s' (code: '%d') to HTTP handler queue.",
self.__context.get_id(), previous_message, code)
def evaluate(self):
(variables_names, variables_values) = self.__extract_variables()
for index_variable in range(len(variables_names)):
if variables_names[index_variable] == "$(QSIM.CONTEXT)":
internal_variable_name = "expression_analyser.current_context.get_tas_info()"
else:
internal_variable_name = "variables_values[" + str(
index_variable) + "]"
self.__expression = self.__expression.replace(
variables_names[index_variable], internal_variable_name)
result = None
try:
with expression_analyser.__evaluation_guard:
expression_analyser.current_context = self.__context
result = eval(self.__expression)
except:
logging.error("Impossible to evaluate expression '%s'.",
self.__expression)
return result
def __send_response(self,
http_code,
json_data=None,
http_message=None,
headers=None):
time.sleep(configuration.get_response_delay() / 1000.0)
self.send_response(http_code, http_message)
self.send_header('Content-Type', 'application/json')
body = None
if json_data is not None:
body = json_data.encode("utf-8")
self.send_header('Content-Length', len(body))
if headers is not None:
for key, value in headers.items():
self.send_header(key, value)
try:
self.end_headers()
if body is not None:
self.wfile.write(body)
statistical.inc_qsim_responses()
logging.info("Send response to TAS (code '%d (%s)', body '%s')",
http_code, str(http_message), body)
except ConnectionResetError:
logging.error(
"Impossible to send request to TAS due to reset connection.")
except Exception as expection_object:
logging.error(
"Impossible to send request to TAS due to unknown reason ('%s')."
% expection_object)
def parse(method, path):
if method == http_method.HTTP_POST:
reg_object = re.match(
"/telephony/v1/account/(\d+)/services/queue/(\d+)/voice/tasks$",
path)
if (reg_object):
return http_parser.extract_qsim_start_request(reg_object)
if re.match(".*/on-command-error", path):
return http_parser.extract_tas_error_callback()
if re.match(".*/on-command-update", path):
return http_parser.extract_tas_update_callback()
elif method == http_method.HTTP_DELETE:
reg_object = re.match(
"/telephony/v1/account/(\d+)/services/queue/(\d+)/voice/tasks/(\d+)",
path)
if reg_object:
return http_parser.extract_qsim_stop_request(reg_object)
elif method == http_method.HTTP_GET:
reg_object = re.match(
"/telephony/v1/account/(\d+)/services/queue/(\d+)/voice/tasks/(\d+)",
path)
if reg_object:
return http_parser.extract_qsim_execution_status(reg_object)
reg_object = re.match(
"/telephony/v1/account/(\d+)/services/status(.*)", path)
if reg_object:
return http_parser.extract_qsim_service_status(reg_object)
else:
logging.error("HTTP method '%s' is not supported.", method)
return parser_failure.UNKNOWN_METHOD
return parser_failure.UNKNOWN_PATH
def __extract_variables(self):
variables_names = []
variables_values = []
start_variable = self.__expression.find("$(", 0)
while start_variable >= 0:
stop_variable = self.__expression.find(")", start_variable + 1)
if stop_variable < 0:
logging.error(
"Impossible to parse expression with variable - incorrect format of variables (expression: '%s').",
self.__expression)
break
# extract variable name
variable_name = self.__expression[start_variable:stop_variable + 1]
# check if it is a system variable
if variable_name == "$(QSIM.CONTEXT)":
variables_names.append(variable_name)
variables_values.append(self.__context)
else:
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 do_POST(self):
tas_host, tas_port = self.client_address[:2]
logging.vip(
"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 isinstance(request, parser_failure):
self.__send_response(self.__parser_failure_to_http_code(request),
"\"Impossible to process POST request.\"")
return
#
# TASK_START
#
if request[struct_field.id] == tas_command_type.TASK_START:
if configuration.get_failure_start_qsim_code() is not None:
self.__send_response(
configuration.get_failure_start_qsim_code(), None,
configuration.get_failure_start_qsim_message())
return
# extract TAS request for session and attach additional information
tas_request = {}
json_request = self.rfile.read(int(
self.headers['Content-Length'])).decode('utf-8')
if (json_request is not None) and (len(json_request) > 0):
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]
# fill by default values
tas_request["session_id"] = tas_request["sessionId"]
tas_request["party_id"] = tas_request["inPartyId"]
tas_request["q_party_id"] = tas_request["qPartyId"]
tas_request["rcaccount_id"] = tas_request["account_id"]
tas_request["rcextension_id"] = tas_request["account_id"]
tas_request["rcbrand_id"] = "1210"
logging.debug(
"QueueId (%s): Store default party ID (%s) and session ID (%s)."
% (request[struct_field.script_id], tas_request["party_id"],
tas_request["session_id"]))
if self.__get_session_manager().create(
request[struct_field.script_id], tas_request) is False:
message = "Impossible to create session object due to lack of scenario file."
logging.error(message)
self.__send_response(http_code.HTTP_NOT_FOUND,
"\"%s\"" % message)
return
try:
response = queue.get(True, 2)
except:
response = None
if response is None:
message = "Event with response is not received."
logging.error(message)
self.__send_response(http_code.HTTP_INTERNAL_SERVER_ERROR,
"\"%s\"" % message)
return
event_type = type(response)
if event_type == event_start_response:
self.__send_response(response.code, response.body,
response.message, response.headers)
elif event_type == event_ignore:
pass
else:
message = "Unexpected event is received."
logging.error(message)
#
# RESULT_ACTION
#
elif (request[struct_field.id] == tas_command_type.ON_COMMAND_UPDATE or
request[struct_field.id] == tas_command_type.ON_COMMAND_ERROR):
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
message_size = int(self.headers['Content-Length'])
json_result = self.rfile.read(message_size).decode('utf-8')
# it is represented by map because most probably other staff may be conveyed to session.
json_instance = None
if message_size > 0:
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}
action_type = request[struct_field.id]
command_id = json_instance.get("commandId", None)
if command_id is None:
logging.error(
"Incorrect action request - commandId is not found in JSON."
)
self.__send_response(
http_code.HTTP_BAD_REQUEST,
"\"JSON body does not contain 'commandId' field.\"")
return
logging.info("Received callback id: '%s':", command_id)
logging.debug(json_result)
session_instance = self.__get_session_manager(
).get_session_by_command_id(command_id)
if session_instance is not None:
# check if code is returned by trigger
reply_code = session_instance.notify(action_type,
message_playload)
#reply_code = self.__get_session_manager().notify(session_id, command_id, message_playload)
if reply_code is None:
# if there is no trigger then let's take it from the queue, if there is user-specific code
try:
response = queue.get(True, 1)
event_type = type(response)
if event_type == event_ignore:
logging.debug(
"Ignore incoming request (do not sent response)."
)
return
reply_code = response.code
reply_message = response.message
logging.debug(
"Specific reply to incoming request '%s' (code: '%s', command ID: '%s')."
% (command_id, reply_code, reply_message))
except:
# otherwise send default code
reply_code = http_code.HTTP_OK
reply_message = "\"Success.\""
logging.debug(
"Default reply is used for incoming request '%s'."
% action_type)
else:
reply_message = "\"Specified reply code is used.\""
logging.debug(
"Specific reply is used for incoming request '%s' via trigger "
"(code: '%s', message: '%s')." %
(command_id, reply_code, reply_message))
self.__send_response(reply_code, reply_message)
return
self.__send_response(
http_code.HTTP_NOT_FOUND, "\"Session for action '" +
str(command_id) + "' is not found.\"")
self.__get_session_manager().get_session_by_command_id(command_id)
else:
self.__send_response(
http_code.HTTP_BAD_REQUEST, "\"Unknown POST type command '" +
str(request[struct_field.id]) + "'.\"")
return
def do_DELETE(self):
tas_host, tas_port = self.client_address[:2]
logging.info(
"Receive HTTP DELETE request from TAS: '%s' (address: '%s:%s').",
self.path, tas_host, tas_port)
request = http_parser.parse(http_method.HTTP_DELETE, self.path)
if isinstance(request, parser_failure):
self.__send_response(self.__parser_failure_to_http_code(request),
"\"Impossible to process DELETE request.\"")
return
#
# TASK_STOP
#
if request[struct_field.id] != tas_command_type.TASK_STOP:
self.__send_response(
http_code.HTTP_BAD_REQUEST, "\"Unknown DELETE type command '" +
str(request[struct_field.id]) + "'.\"")
return
if configuration.get_failure_stop_qsim_code() is not None:
self.__send_response(configuration.get_failure_stop_qsim_code(),
None,
configuration.get_failure_stop_qsim_message())
return
session_id = request[struct_field.session_id]
if self.__get_session_manager().exist(session_id) is True:
# notify to check whether scenario contains something specific about termination
self.__get_session_manager().notify(session_id,
tas_command_type.TASK_STOP,
None)
try:
response = queue.get(True, 1)
except:
response = None
if response is None: # scenario does not have anything specific about termination
reply_code = self.__get_session_manager().delete(session_id)
if reply_code is None:
reply_code = http_code.HTTP_OK_NO_CONTENT
logging.info(
"Reply is not provided for TASK_STOP, use simulator response code (%d).",
reply_code)
self.__send_response(reply_code)
else:
event_type = type(response)
if event_type == event_ignore:
pass
elif event_type == event_response:
logging.info(
"Reply to TASK_STOP is provided by scenario (code: %d).",
response.code)
self.__send_response(response.code, response.body,
response.message, response.headers)
else:
message = "Unexpected event is received."
logging.error(message)
else:
self.__send_response(
http_code.HTTP_NOT_FOUND,
"\"Session '" + str(session_id) + "' is not found.\"")
def __process_command_end_trigger(self, command):
if self.__subfunction != code_block_type.CODE_BLOCK_TRIGGER:
logging.error("Unexpected keyword '%s' is appeard in non-subbody in line '%s' (%d).", command, self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_INCORRECT_FORMAT)
return True
def __process_command_end_if(self, command):
if self.__subfunction != code_block_type.CODE_BLOCK_CONDITION:
logging.error("Unexpected keyword '%s' (end of conditional block) without conditional block in line '%s' (%d).", command, self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_INCORRECT_FORMAT)
return True
def __process_command(self, command, argument):
if self.__content_flag is True:
if self.__command_sequence[-1][0] == command_type.COMMAND_REPLY:
self.__command_sequence[-1][1][2] = self.__command_content.lstrip().rstrip()
self.__command_sequence[-1][1][3] = self.__command_headers
elif self.__command_sequence[-1][0] == command_type.COMMAND_SEND:
self.__command_sequence[-1][1][1] = self.__command_content.lstrip().rstrip()
self.__command_sequence[-1][1][2] = self.__command_headers
self.__content_flag = False
self.__command_content = ""
self.__command_headers = {}
if command == command_type.COMMAND_SEND:
self.__process_command_send(command, argument)
elif command == command_type.COMMAND_TIMEOUT:
self.__process_command_timeout(command, argument)
elif command == command_type.COMMAND_WAIT:
self.__process_command_wait(command, argument)
elif command == command_type.COMMAND_REPLY:
self.__process_command_reply(command, argument)
elif command == command_type.COMMAND_IGNORE:
self.__process_command_ignore(command, argument)
elif command == command_type.COMMAND_ASK:
self.__process_command_ask(command, argument)
elif command == command_type.COMMAND_ASSIGN:
self.__process_command_assign(command, argument)
elif command == command_type.COMMAND_EXIT:
self.__process_command_exit(command)
elif command == command_type.COMMAND_PRINT:
self.__process_command_print(command, argument)
elif command == command_type.COMMAND_MOVE_JSON:
self.__process_command_move_json(command, argument)
elif command == command_type.COMMAND_IF:
self.__process_command_if(command, argument)
elif command == command_type.COMMAND_ELSE:
if self.__process_command_else(command) is False:
return False
elif command == command_type.COMMAND_END_IF:
if self.__process_command_end_if(command) is False:
return False
elif command == command_type.COMMAND_TRIGGER:
self.__process_command_trigger(command, argument)
elif command == command_type.COMMAND_END_TRIGGER:
if self.__process_command_end_trigger(command) is False:
return False
else:
logging.error("Unknown command is detected '%s' in line '%s' (%d).", command, self.__line, self.__line_counter)
sys.exit(error_code.ERROR_SCRIPT_UNKNOWN_COMMAND)
def __process_send_command(self, action, tas_content, headers, arguments):
logging.debug("(QSim Service task '%s') command SEND is executing...", self.__context.get_id())
if action == "PLAY":
tas_link = self.__context.get_tas_link_start_play()
tas_method = "POST"
elif action == "STOP_PLAY":
tas_link = self.__context.get_tas_link_stop_play()
tas_method = "DELETE"
elif action == "GET_PLAY":
tas_link = self.__context.get_tas_link_stop_play()
tas_method = "GET"
elif action == "COLLECT":
tas_link = self.__context.get_tas_link_start_collect()
tas_method = "POST"
elif action == "GET_COLLECT":
tas_link = self.__context.get_tas_link_get_collect()
tas_method = "GET"
elif action == "STOP_COLLECT":
tas_link = self.__context.get_tas_link_stop_collect()
tas_method = "DELETE"
elif action == "FORWARD":
party_id = None
if len(arguments) > 0:
expression = arguments[0]
analyser = expression_analyser(expression, self.__context)
party_id = analyser.evaluate()
arguments = []
tas_link = self.__context.get_tas_link_forward(party_id)
tas_method = "POST"
elif action == "FORWARD_GROUP":
tas_link = self.__context.get_tas_link_add_forward_group()
tas_method = "POST"
elif action == "PATCH_FORWARD_GROUP":
tas_link = self.__context.get_tas_link_forward_group()
tas_method = "PATCH"
elif action == "GET_FORWARD_GROUP":
tas_link = self.__context.get_tas_link_forward_group()
tas_method = "GET"
elif action == "DELETE_FORWARD_GROUP":
tas_link = self.__context.get_tas_link_forward_group()
tas_method = "DELETE"
elif action == "GET_SESSION":
tas_link = self.__context.get_tas_link_session()
tas_method = "GET"
else:
logging.error("Unknown send command '%s'.", action)
return
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("(QSim Service task '%s') send command request to TAS ('%s', '%s').", self.__context.get_id(), tas_method, action)
custom_headers = {"rcaccountid": self.__context.get_rcaccount_id(),
"rcextensionid": self.__context.get_rcextension_id(),
"rcbrandid": self.__context.get_brand_id(),
"origin": "127.0.0.1:" + str(configuration.get_qsim_port())}
# add new and overwrite existed default custom headers in line with scenario
for key, value in headers.items():
custom_headers[key.lower()] = value
(status, json_response) = self.__send(tas_method, tas_link, tas_content, custom_headers)
if json_response is not None:
self.__context.set_last_input_message(json_response)
if (status >= 200) and (status <= 299):
if (tas_method == "POST") and (json_response is not None) and (len(json_response) > 0):
response = json.loads(json_response.decode('utf-8'))
if action == "PLAY":
action_id = response['id']
self.__context.set_play_id(action_id)
elif action == "COLLECT":
action_id = response['id']
self.__context.set_collect_id(action_id)
elif action == "FORWARD_GROUP":
action_id = response['id']
self.__context.set_forward_group_id(action_id)
else:
action_id = None
logging.info("(QSim Service task '%s') TAS accepts '%s' command '%s' and return action id: '%s'.", self.__context.get_id(), tas_method, action, action_id)
else:
logging.vip("(QSim Service task '%s') TAS reply to '%s' command '%s' by success status (code: '%d').", self.__context.get_id(), tas_method, action, status)
else:
logging.warning("(QSim Service task '%s') TAS reply to '%s' command '%s' by failure status (code: '%d', reason: '%s').", self.__context.get_id(), tas_method, action, status, json_response)