I have copied and editied the OrderFlowers Amazon Lex blueprint to ask for a person's first and last name. When testing the Lambda function, I get the correct response but when trying to invoke my intent in Lex I get a 424 error Failed Dependency in my broswer console, and my test bot reports "An error has occurred: Invalid Lambda Response: Received error response from Lambda: Unhandled". I have looked over the code a number of times and I cannot work out if it is a permission issue or, there is something wrong with the fulfillment. My code is below and thanks in advance.
import math
import dateutil.parser
import datetime
import time
import os
import logging
logger = logging.getLogger()
logger.setLevel(logging.DEBUG)
def get_slots(intent_request):
return intent_request['currentIntent']['slots']
def elicit_slot(session_attributes, intent_name, slots, slot_to_elicit, message):
return {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'ElicitSlot',
'intentName': intent_name,
'slots': slots,
'slotToElicit': slot_to_elicit,
'message': message
}
}
def close(session_attributes, fulfillment_state, message):
response = {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'Close',
'fulfillmentState': fulfillment_state,
'message': message
}
}
return response
def delegate(session_attributes, slots):
return {
'sessionAttributes': session_attributes,
'dialogAction': {
'type': 'Delegate',
'slots': slots
}
}
def parse_int(n):
try:
return int(n)
except ValueError:
return float('nan')
def build_validation_result(is_valid, violated_slot, message_content):
if message_content is None:
return {
"isValid": is_valid,
"violatedSlot": violated_slot,
}
return {
'isValid': is_valid,
'violatedSlot': violated_slot,
'message': {'contentType': 'PlainText', 'content': message_content}
}
def validate_get_name(first_name, last_name):
first_name = ['john', 'ben']
if first_name is None and first_name not in first_name:
return build_validation_result(False,
'FirstName',
'Sorry please state your first name. ')
last_name = ['smith', 'doran']
if last_name is None and last_name not in last_name:
return build_validation_result (False,
'LastName',
'Sorry please state your last name. ')
return build_validation_result(True, None, None)
def get_name(intent_request):
first_name = get_slots(intent_request)["FirstName"]
last_name = get_slots(intent_request)["LastName"]
source = intent_request['invocationSource']
if source == 'DialogCodeHook':
slots = get_slots(intent_request)
validation_result = validate_get_name(first_name, last_name)
if not validation_result['isValid']:
slots[validation_result['violatedSlot']] = None
return elicit_slot(intent_request['sessionAttributes'],
intent_request['currentIntent']['name'],
slots,
validation_result['violatedSlot'],
validation_result['message'])
output_session_attributes = intent_request['sessionAttributes'] if intent_request['sessionAttributes'] is not None else {}
if get_name is not None:
return delegate(output_session_attributes, get_slots(intent_request))
return close(intent_request['sessionAttributes'],
'Fulfilled',
{'contentType': 'PlainText',
'content': 'Thanks, we have now preformed your intent'})
def dispatch(intent_request):
logger.debug('dispatch userId={}, intentName={}'.format(intent_request['userId'], intent_request['currentIntent']['name']))
intent_name = intent_request['currentIntent']['name']
if intent_name == 'GetName':
return get_name(intent_request)
raise Exception('Intent with name ' + intent_name + ' not supported')
def lambda_handler(event, context):
os.environ['TZ'] = 'America/New_York'
time.tzset()
logger.debug('event.bot.name={}'.format(event['bot']['name']))
return dispatch(event)
