def publish_message(topic_arn, req_data, subscription_arn=None):
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
for subscriber in SNS_SUBSCRIPTIONS.get(topic_arn, []):
if subscription_arn not in [None, subscriber['SubscriptionArn']]:
continue
filter_policy = json.loads(subscriber.get('FilterPolicy') or '{}')
message_attributes = get_message_attributes(req_data)
if not check_filter_policy(filter_policy, message_attributes):
continue
if subscriber['Protocol'] == 'sqs':
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
try:
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data),
MessageAttributes=create_sqs_message_attributes(
subscriber, message_attributes))
except Exception as exc:
return make_error(message=str(exc), code=400)
elif subscriber['Protocol'] == 'lambda':
lambda_api.process_sns_notification(subscriber['Endpoint'],
topic_arn,
subscriber['SubscriptionArn'],
message,
message_attributes,
subject=req_data.get(
'Subject', [None])[0])
elif subscriber['Protocol'] in ['http', 'https']:
msg_type = (req_data.get('Type') or ['Notification'])[0]
try:
message_body = create_sns_message_body(subscriber, req_data)
except Exception as exc:
return make_error(message=str(exc), code=400)
requests.post(
subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
# AWS headers according to
# https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-header
'x-amz-sns-message-type': msg_type,
'x-amz-sns-topic-arn': subscriber['TopicArn'],
'x-amz-sns-subscription-arn':
subscriber['SubscriptionArn'],
'User-Agent': 'Amazon Simple Notification Service Agent'
},
data=message_body,
verify=False)
else:
LOGGER.warning('Unexpected protocol "%s" for SNS subscription' %
subscriber['Protocol'])
def publish_message(topic_arn, req_data):
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
for subscriber in SNS_SUBSCRIPTIONS.get(topic_arn, []):
filter_policy = json.loads(subscriber.get('FilterPolicy', '{}'))
message_attributes = get_message_attributes(req_data)
if not check_filter_policy(filter_policy, message_attributes):
continue
if subscriber['Protocol'] == 'sqs':
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
try:
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data),
MessageAttributes=create_sqs_message_attributes(subscriber, message_attributes)
)
except Exception as exc:
return make_error(message=str(exc), code=400)
elif subscriber['Protocol'] == 'lambda':
lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
subscriber['SubscriptionArn'],
message,
message_attributes,
subject=req_data.get('Subject', [None])[0]
)
elif subscriber['Protocol'] in ['http', 'https']:
try:
message_body = create_sns_message_body(subscriber, req_data)
except Exception as exc:
return make_error(message=str(exc), code=400)
requests.post(
subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
'x-amz-sns-message-type': 'Notification'
},
data=message_body
)
else:
LOGGER.warning('Unexpected protocol "%s" for SNS subscription' % subscriber['Protocol'])
def publish_message(topic_arn, req_data, subscription_arn=None):
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
LOG.debug('Publishing message to TopicArn: %s | Message: %s' % (topic_arn, message))
subscriptions = SNS_SUBSCRIPTIONS.get(topic_arn, [])
for subscriber in list(subscriptions):
if subscription_arn not in [None, subscriber['SubscriptionArn']]:
continue
filter_policy = json.loads(subscriber.get('FilterPolicy') or '{}')
message_attributes = get_message_attributes(req_data)
if not check_filter_policy(filter_policy, message_attributes):
continue
if subscriber['Protocol'] == 'sqs':
queue_url = None
try:
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data),
MessageAttributes=create_sqs_message_attributes(subscriber, message_attributes)
)
except Exception as exc:
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'], req_data, str(exc))
if 'NonExistentQueue' in str(exc):
LOG.info('Removing non-existent queue "%s" subscribed to topic "%s"' % (queue_url, topic_arn))
subscriptions.remove(subscriber)
elif subscriber['Protocol'] == 'lambda':
try:
external_url = external_service_url('sns')
unsubscribe_url = '%s/?Action=Unsubscribe&SubscriptionArn=%s' % (external_url,
subscriber['SubscriptionArn'])
response = lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
subscriber['SubscriptionArn'],
message,
message_attributes,
unsubscribe_url,
subject=req_data.get('Subject', [None])[0]
)
if isinstance(response, FlaskResponse):
response.raise_for_status()
except Exception as exc:
LOG.warning('Unable to run Lambda function on SNS message: %s %s' % (exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'], req_data, str(exc))
elif subscriber['Protocol'] in ['http', 'https']:
msg_type = (req_data.get('Type') or ['Notification'])[0]
try:
message_body = create_sns_message_body(subscriber, req_data)
except Exception:
continue
try:
response = requests.post(
subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
# AWS headers according to
# https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-header
'x-amz-sns-message-type': msg_type,
'x-amz-sns-topic-arn': subscriber['TopicArn'],
'x-amz-sns-subscription-arn': subscriber['SubscriptionArn'],
'User-Agent': 'Amazon Simple Notification Service Agent'
},
data=message_body,
verify=False
)
response.raise_for_status()
except Exception as exc:
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'], req_data, str(exc))
else:
LOG.warning('Unexpected protocol "%s" for SNS subscription' % subscriber['Protocol'])
async def message_to_subscriber(
message_id,
message,
topic_arn,
req_data,
headers,
subscription_arn,
skip_checks,
sns_backend,
subscriber,
subscriptions,
message_attributes,
):
if subscription_arn not in [None, subscriber["SubscriptionArn"]]:
return
filter_policy = json.loads(subscriber.get("FilterPolicy") or "{}")
if not message_attributes:
message_attributes = get_message_attributes(req_data)
if not skip_checks and not check_filter_policy(filter_policy,
message_attributes):
LOG.info("SNS filter policy %s does not match attributes %s",
filter_policy, message_attributes)
return
if subscriber["Protocol"] == "sms":
event = {
"topic_arn": topic_arn,
"endpoint": subscriber["Endpoint"],
"message_content": req_data["Message"][0],
}
sns_backend.sms_messages.append(event)
LOG.info(
"Delivering SMS message to %s: %s",
subscriber["Endpoint"],
req_data["Message"][0],
)
# MOCK DATA
delivery = {
"phoneCarrier": "Mock Carrier",
"mnc": 270,
"priceInUSD": 0.00645,
"smsType": "Transactional",
"mcc": 310,
"providerResponse": "Message has been accepted by phone carrier",
"dwellTimeMsUntilDeviceAck": 200,
}
store_delivery_log(subscriber, True, message, message_id, delivery)
return
elif subscriber["Protocol"] == "sqs":
queue_url = None
try:
endpoint = subscriber["Endpoint"]
if "sqs_queue_url" in subscriber:
queue_url = subscriber.get("sqs_queue_url")
elif "://" in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(":")[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber["sqs_queue_url"] = queue_url
message_group_id = (req_data.get("MessageGroupId")
if req_data.get("MessageGroupId") else "")
if isinstance(message_group_id, list):
message_group_id = message_group_id[0]
message_deduplication_id = (
req_data.get("MessageDeduplicationId")[0]
if req_data.get("MessageDeduplicationId") else "")
sqs_client = aws_stack.connect_to_service("sqs")
kwargs = {}
if message_group_id:
kwargs["MessageGroupId"] = message_group_id
if message_deduplication_id:
kwargs["MessageDeduplicationId"] = message_deduplication_id
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data,
message_id),
MessageAttributes=create_sqs_message_attributes(
subscriber, message_attributes),
MessageSystemAttributes=create_sqs_system_attributes(headers),
**kwargs,
)
store_delivery_log(subscriber, True, message, message_id)
except Exception as exc:
LOG.info("Unable to forward SNS message to SQS: %s %s", exc,
traceback.format_exc())
store_delivery_log(subscriber, False, message, message_id)
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
if "NonExistentQueue" in str(exc):
LOG.info(
'Removing non-existent queue "%s" subscribed to topic "%s"',
queue_url,
topic_arn,
)
subscriptions.remove(subscriber)
return
elif subscriber["Protocol"] == "lambda":
try:
external_url = external_service_url("sns")
unsubscribe_url = "%s/?Action=Unsubscribe&SubscriptionArn=%s" % (
external_url,
subscriber["SubscriptionArn"],
)
response = lambda_api.process_sns_notification(
subscriber["Endpoint"],
topic_arn,
subscriber["SubscriptionArn"],
message,
message_id,
message_attributes,
unsubscribe_url,
subject=req_data.get("Subject", [None])[0],
)
if response is not None:
delivery = {
"statusCode": response.status_code,
"providerResponse": response.get_data(),
}
store_delivery_log(subscriber, True, message, message_id,
delivery)
if isinstance(response, Response):
response.raise_for_status()
elif isinstance(response, FlaskResponse):
if response.status_code >= 400:
raise Exception("Error response (code %s): %s" %
(response.status_code, response.data))
except Exception as exc:
LOG.info("Unable to run Lambda function on SNS message: %s %s",
exc, traceback.format_exc())
store_delivery_log(subscriber, False, message, message_id)
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
return
elif subscriber["Protocol"] in ["http", "https"]:
msg_type = (req_data.get("Type") or ["Notification"])[0]
try:
message_body = create_sns_message_body(subscriber, req_data,
message_id)
except Exception:
return
try:
response = requests.post(
subscriber["Endpoint"],
headers={
"Content-Type": "text/plain",
# AWS headers according to
# https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-header
"x-amz-sns-message-type": msg_type,
"x-amz-sns-topic-arn": subscriber["TopicArn"],
"x-amz-sns-subscription-arn":
subscriber["SubscriptionArn"],
"User-Agent": "Amazon Simple Notification Service Agent",
},
data=message_body,
verify=False,
)
delivery = {
"statusCode": response.status_code,
"providerResponse": response.content.decode("utf-8"),
}
store_delivery_log(subscriber, True, message, message_id, delivery)
response.raise_for_status()
except Exception as exc:
LOG.info(
"Received error on sending SNS message, putting to DLQ (if configured): %s",
exc)
store_delivery_log(subscriber, False, message, message_id)
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
return
elif subscriber["Protocol"] == "application":
try:
sns_client = aws_stack.connect_to_service("sns")
sns_client.publish(TargetArn=subscriber["Endpoint"],
Message=message)
store_delivery_log(subscriber, True, message, message_id)
except Exception as exc:
LOG.warning(
"Unable to forward SNS message to SNS platform app: %s %s",
exc,
traceback.format_exc(),
)
store_delivery_log(subscriber, False, message, message_id)
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
return
elif subscriber["Protocol"] in ["email", "email-json"]:
ses_client = aws_stack.connect_to_service("ses")
if subscriber.get("Endpoint"):
ses_client.verify_email_address(
EmailAddress=subscriber.get("Endpoint"))
ses_client.verify_email_address(
EmailAddress="*****@*****.**")
ses_client.send_email(
Source="*****@*****.**",
Message={
"Body": {
"Text": {
"Data":
create_sns_message_body(subscriber=subscriber,
req_data=req_data,
message_id=message_id) if
subscriber["Protocol"] == "email-json" else message
}
},
"Subject": {
"Data": "SNS-Subscriber-Endpoint"
},
},
Destination={"ToAddresses": [subscriber.get("Endpoint")]},
)
store_delivery_log(subscriber, True, message, message_id)
else:
LOG.warning('Unexpected protocol "%s" for SNS subscription',
subscriber["Protocol"])
def message_to_subscribers(message_id,
message,
topic_arn,
req_data,
subscription_arn=None,
skip_checks=False):
subscriptions = SNS_SUBSCRIPTIONS.get(topic_arn, [])
for subscriber in list(subscriptions):
if subscription_arn not in [None, subscriber['SubscriptionArn']]:
continue
filter_policy = json.loads(subscriber.get('FilterPolicy') or '{}')
message_attributes = get_message_attributes(req_data)
if not skip_checks and not check_filter_policy(filter_policy,
message_attributes):
LOG.info('SNS filter policy %s does not match attributes %s' %
(filter_policy, message_attributes))
continue
if subscriber['Protocol'] == 'sms':
event = {
'topic_arn': topic_arn,
'endpoint': subscriber['Endpoint'],
'message_content': req_data['Message'][0]
}
SMS_MESSAGES.append(event)
LOG.info('Delivering SMS message to %s: %s',
subscriber['Endpoint'], req_data['Message'][0])
elif subscriber['Protocol'] == 'sqs':
queue_url = None
try:
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
sqs_client = aws_stack.connect_to_service('sqs')
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(
subscriber, req_data, message_id),
MessageAttributes=create_sqs_message_attributes(
subscriber, message_attributes))
except Exception as exc:
LOG.warning('Unable to forward SNS message to SQS: %s %s' %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
if 'NonExistentQueue' in str(exc):
LOG.info(
'Removing non-existent queue "%s" subscribed to topic "%s"'
% (queue_url, topic_arn))
subscriptions.remove(subscriber)
elif subscriber['Protocol'] == 'lambda':
try:
external_url = external_service_url('sns')
unsubscribe_url = '%s/?Action=Unsubscribe&SubscriptionArn=%s' % (
external_url, subscriber['SubscriptionArn'])
response = lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
subscriber['SubscriptionArn'],
message,
message_id,
message_attributes,
unsubscribe_url,
subject=req_data.get('Subject', [None])[0])
if isinstance(response, Response):
response.raise_for_status()
elif isinstance(response, FlaskResponse):
if response.status_code >= 400:
raise Exception('Error response (code %s): %s' %
(response.status_code, response.data))
except Exception as exc:
LOG.warning(
'Unable to run Lambda function on SNS message: %s %s' %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
elif subscriber['Protocol'] in ['http', 'https']:
msg_type = (req_data.get('Type') or ['Notification'])[0]
try:
message_body = create_sns_message_body(subscriber, req_data,
message_id)
except Exception:
continue
try:
response = requests.post(
subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
# AWS headers according to
# https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-header
'x-amz-sns-message-type': msg_type,
'x-amz-sns-topic-arn': subscriber['TopicArn'],
'x-amz-sns-subscription-arn':
subscriber['SubscriptionArn'],
'User-Agent':
'Amazon Simple Notification Service Agent'
},
data=message_body,
verify=False)
response.raise_for_status()
except Exception as exc:
LOG.info(
'Received error on sending SNS message, putting to DLQ (if configured): %s'
% exc)
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
elif subscriber['Protocol'] == 'application':
try:
sns_client = aws_stack.connect_to_service('sns')
sns_client.publish(TargetArn=subscriber['Endpoint'],
Message=message)
except Exception as exc:
LOG.warning(
'Unable to forward SNS message to SNS platform app: %s %s'
% (exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
else:
LOG.warning('Unexpected protocol "%s" for SNS subscription' %
subscriber['Protocol'])
def forward_request(self, method, path, data, headers):
if method == 'POST' and path == '/':
req_data = urlparse.parse_qs(to_str(data))
req_action = req_data['Action'][0]
topic_arn = req_data.get('TargetArn') or req_data.get('TopicArn')
if topic_arn:
topic_arn = topic_arn[0]
do_create_topic(topic_arn)
if req_action == 'SetSubscriptionAttributes':
sub = get_subscription_by_arn(req_data['SubscriptionArn'][0])
if not sub:
return make_error(
message='Unable to find subscription for given ARN',
code=400)
attr_name = req_data['AttributeName'][0]
attr_value = req_data['AttributeValue'][0]
sub[attr_name] = attr_value
return make_response(req_action)
elif req_action == 'GetSubscriptionAttributes':
sub = get_subscription_by_arn(req_data['SubscriptionArn'][0])
if not sub:
return make_error(
message='Unable to find subscription for given ARN',
code=400)
content = '<Attributes>'
for key, value in sub.items():
content += '<entry><key>%s</key><value>%s</value></entry>\n' % (
key, value)
content += '</Attributes>'
return make_response(req_action, content=content)
elif req_action == 'Subscribe':
if 'Endpoint' not in req_data:
return make_error(
message='Endpoint not specified in subscription',
code=400)
elif req_action == 'Unsubscribe':
if 'SubscriptionArn' not in req_data:
return make_error(
message=
'SubscriptionArn not specified in unsubscribe request',
code=400)
do_unsubscribe(req_data.get('SubscriptionArn')[0])
elif req_action == 'Publish':
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
for subscriber in SNS_SUBSCRIPTIONS[topic_arn]:
if subscriber['Protocol'] == 'sqs':
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(
subscriber, req_data))
elif subscriber['Protocol'] == 'lambda':
lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
message,
subject=req_data.get('Subject'))
elif subscriber['Protocol'] in ['http', 'https']:
requests.post(subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
'x-amz-sns-message-type':
'Notification'
},
data=create_sns_message_body(
subscriber, req_data))
else:
LOGGER.warning(
'Unexpected protocol "%s" for SNS subscription' %
subscriber['Protocol'])
# return response here because we do not want the request to be forwarded to SNS
return make_response(req_action)
return True
def forward_request(self, method, path, data, headers):
if method == 'POST' and path == '/':
req_data = urlparse.parse_qs(to_str(data))
req_action = req_data['Action'][0]
topic_arn = req_data.get('TargetArn') or req_data.get('TopicArn')
if topic_arn:
topic_arn = topic_arn[0]
do_create_topic(topic_arn)
if req_action == 'SetSubscriptionAttributes':
sub = get_subscription_by_arn(req_data['SubscriptionArn'][0])
if not sub:
return make_error(message='Unable to find subscription for given ARN', code=400)
attr_name = req_data['AttributeName'][0]
attr_value = req_data['AttributeValue'][0]
sub[attr_name] = attr_value
return make_response(req_action)
elif req_action == 'GetSubscriptionAttributes':
sub = get_subscription_by_arn(req_data['SubscriptionArn'][0])
if not sub:
return make_error(message='Unable to find subscription for given ARN', code=400)
content = '<Attributes>'
for key, value in sub.items():
content += '<entry><key>%s</key><value>%s</value></entry>\n' % (key, value)
content += '</Attributes>'
return make_response(req_action, content=content)
elif req_action == 'Subscribe':
if 'Endpoint' not in req_data:
return make_error(message='Endpoint not specified in subscription', code=400)
elif req_action == 'Unsubscribe':
if 'SubscriptionArn' not in req_data:
return make_error(message='SubscriptionArn not specified in unsubscribe request', code=400)
do_unsubscribe(req_data.get('SubscriptionArn')[0])
elif req_action == 'Publish':
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
for subscriber in SNS_SUBSCRIPTIONS[topic_arn]:
filter_policy = json.loads(subscriber.get('FilterPolicy', '{}'))
message_attributes = get_message_attributes(req_data)
if check_filter_policy(filter_policy, message_attributes):
if subscriber['Protocol'] == 'sqs':
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
try:
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data)
)
except Exception as exc:
return make_error(message=str(exc), code=400)
elif subscriber['Protocol'] == 'lambda':
lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn, message, subject=req_data.get('Subject', [None])[0]
)
elif subscriber['Protocol'] in ['http', 'https']:
try:
message_body = create_sns_message_body(subscriber, req_data)
except Exception as exc:
return make_error(message=str(exc), code=400)
requests.post(
subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
'x-amz-sns-message-type': 'Notification'
},
data=message_body
)
else:
LOGGER.warning('Unexpected protocol "%s" for SNS subscription' % subscriber['Protocol'])
# return response here because we do not want the request to be forwarded to SNS
return make_response(req_action)
return True
async def message_to_subscriber(message_id, message, topic_arn, req_data,
headers, subscription_arn, skip_checks,
sns_backend, subscriber, subscriptions):
if subscription_arn not in [None, subscriber['SubscriptionArn']]:
return
filter_policy = json.loads(subscriber.get('FilterPolicy') or '{}')
message_attributes = get_message_attributes(req_data)
if not skip_checks and not check_filter_policy(filter_policy,
message_attributes):
LOG.info('SNS filter policy %s does not match attributes %s' %
(filter_policy, message_attributes))
return
if subscriber['Protocol'] == 'sms':
event = {
'topic_arn': topic_arn,
'endpoint': subscriber['Endpoint'],
'message_content': req_data['Message'][0]
}
sns_backend.sms_messages.append(event)
LOG.info('Delivering SMS message to %s: %s', subscriber['Endpoint'],
req_data['Message'][0])
return
elif subscriber['Protocol'] == 'sqs':
queue_url = None
try:
endpoint = subscriber['Endpoint']
if 'sqs_queue_url' in subscriber:
queue_url = subscriber.get('sqs_queue_url')
elif '://' in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(':')[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
message_group_id = req_data.get(
'MessageGroupId')[0] if req_data.get('MessageGroupId') else ''
sqs_client = aws_stack.connect_to_service('sqs')
# TODO remove this kwargs if we stop using ElasticMQ entirely
kwargs = {
'MessageGroupId': message_group_id
} if SQS_BACKEND_IMPL == 'moto' else {}
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data,
message_id),
MessageAttributes=create_sqs_message_attributes(
subscriber, message_attributes),
MessageSystemAttributes=create_sqs_system_attributes(headers),
**kwargs)
except Exception as exc:
LOG.info('Unable to forward SNS message to SQS: %s %s' %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
if 'NonExistentQueue' in str(exc):
LOG.info(
'Removing non-existent queue "%s" subscribed to topic "%s"'
% (queue_url, topic_arn))
subscriptions.remove(subscriber)
return
elif subscriber['Protocol'] == 'lambda':
try:
external_url = external_service_url('sns')
unsubscribe_url = '%s/?Action=Unsubscribe&SubscriptionArn=%s' % (
external_url, subscriber['SubscriptionArn'])
response = lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
subscriber['SubscriptionArn'],
message,
message_id,
message_attributes,
unsubscribe_url,
subject=req_data.get('Subject', [None])[0])
if isinstance(response, Response):
response.raise_for_status()
elif isinstance(response, FlaskResponse):
if response.status_code >= 400:
raise Exception('Error response (code %s): %s' %
(response.status_code, response.data))
except Exception as exc:
LOG.info('Unable to run Lambda function on SNS message: %s %s' %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
return
elif subscriber['Protocol'] in ['http', 'https']:
msg_type = (req_data.get('Type') or ['Notification'])[0]
try:
message_body = create_sns_message_body(subscriber, req_data,
message_id)
except Exception:
return
try:
response = requests.post(
subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
# AWS headers according to
# https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-header
'x-amz-sns-message-type': msg_type,
'x-amz-sns-topic-arn': subscriber['TopicArn'],
'x-amz-sns-subscription-arn':
subscriber['SubscriptionArn'],
'User-Agent': 'Amazon Simple Notification Service Agent'
},
data=message_body,
verify=False)
response.raise_for_status()
except Exception as exc:
LOG.info(
'Received error on sending SNS message, putting to DLQ (if configured): %s'
% exc)
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
return
elif subscriber['Protocol'] == 'application':
try:
sns_client = aws_stack.connect_to_service('sns')
sns_client.publish(TargetArn=subscriber['Endpoint'],
Message=message)
except Exception as exc:
LOG.warning(
'Unable to forward SNS message to SNS platform app: %s %s' %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber['SubscriptionArn'],
req_data, str(exc))
return
elif subscriber['Protocol'] == 'email':
ses_client = aws_stack.connect_to_service('ses')
if subscriber.get('Endpoint'):
ses_client.verify_email_address(
EmailAddress=subscriber.get('Endpoint'))
ses_client.verify_email_address(
EmailAddress='*****@*****.**')
ses_client.send_email(
Source='*****@*****.**',
Message={
'Body': {
'Text': {
'Data': message
}
},
'Subject': {
'Data': 'SNS-Subscriber-Endpoint'
}
},
Destination={'ToAddresses': [subscriber.get('Endpoint')]})
else:
LOG.warning('Unexpected protocol "%s" for SNS subscription' %
subscriber['Protocol'])
def update_sns(method,
path,
data,
headers,
response=None,
return_forward_info=False):
if return_forward_info:
if method == 'POST' and path == '/':
req_data = urlparse.parse_qs(data)
topic_arn = req_data.get('TargetArn') or req_data.get('TopicArn')
if topic_arn:
topic_arn = topic_arn[0]
if topic_arn not in SNS_SUBSCRIPTIONS:
SNS_SUBSCRIPTIONS[topic_arn] = []
if 'Subscribe' in req_data['Action']:
subscription = {
# http://docs.aws.amazon.com/cli/latest/reference/sns/get-subscription-attributes.html
'TopicArn': topic_arn,
'Endpoint': req_data['Endpoint'][0],
'Protocol': req_data['Protocol'][0],
'RawMessageDelivery': 'false'
}
SNS_SUBSCRIPTIONS[topic_arn].append(subscription)
elif 'Publish' in req_data['Action']:
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
for subscriber in SNS_SUBSCRIPTIONS[topic_arn]:
if subscriber['Protocol'] == 'sqs':
queue_name = subscriber['Endpoint'].split(':')[5]
queue_url = subscriber.get('sqs_queue_url')
if not queue_url:
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(
subscriber, req_data))
elif subscriber['Protocol'] == 'lambda':
lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
message,
subject=req_data.get('Subject'))
elif subscriber['Protocol'] == 'http':
requests.post(subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
'x-amz-sns-message-type':
'Notification'
},
data=json.dumps({
'Type': 'Notification',
'Message': message,
}))
else:
LOGGER.warning(
'Unexpected protocol "%s" for SNS subscription' %
subscriber['Protocol'])
# return response here because we do not want the request to be forwarded to SNS
response = Response()
response._content = """<PublishResponse xmlns="http://sns.amazonaws.com/doc/2010-03-31/">
<PublishResult><MessageId>n/a</MessageId></PublishResult>
<ResponseMetadata><RequestId>n/a</RequestId></ResponseMetadata></PublishResponse>"""
response.status_code = 200
return response
return True
async def message_to_subscriber(
message_id,
message,
topic_arn,
req_data,
headers,
subscription_arn,
skip_checks,
sns_backend,
subscriber,
subscriptions,
):
if subscription_arn not in [None, subscriber["SubscriptionArn"]]:
return
filter_policy = json.loads(subscriber.get("FilterPolicy") or "{}")
message_attributes = get_message_attributes(req_data)
if not skip_checks and not check_filter_policy(filter_policy,
message_attributes):
LOG.info("SNS filter policy %s does not match attributes %s" %
(filter_policy, message_attributes))
return
if subscriber["Protocol"] == "sms":
event = {
"topic_arn": topic_arn,
"endpoint": subscriber["Endpoint"],
"message_content": req_data["Message"][0],
}
sns_backend.sms_messages.append(event)
LOG.info(
"Delivering SMS message to %s: %s",
subscriber["Endpoint"],
req_data["Message"][0],
)
return
elif subscriber["Protocol"] == "sqs":
queue_url = None
try:
endpoint = subscriber["Endpoint"]
if "sqs_queue_url" in subscriber:
queue_url = subscriber.get("sqs_queue_url")
elif "://" in endpoint:
queue_url = endpoint
else:
queue_name = endpoint.split(":")[5]
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber["sqs_queue_url"] = queue_url
message_group_id = (req_data.get("MessageGroupId")[0]
if req_data.get("MessageGroupId") else "")
sqs_client = aws_stack.connect_to_service("sqs")
# TODO remove this kwargs if we stop using ElasticMQ entirely
kwargs = {
"MessageGroupId": message_group_id
} if SQS_BACKEND_IMPL == "moto" else {}
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(subscriber, req_data,
message_id),
MessageAttributes=create_sqs_message_attributes(
subscriber, message_attributes),
MessageSystemAttributes=create_sqs_system_attributes(headers),
**kwargs,
)
except Exception as exc:
LOG.info("Unable to forward SNS message to SQS: %s %s" %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
if "NonExistentQueue" in str(exc):
LOG.info(
'Removing non-existent queue "%s" subscribed to topic "%s"'
% (queue_url, topic_arn))
subscriptions.remove(subscriber)
return
elif subscriber["Protocol"] == "lambda":
try:
external_url = external_service_url("sns")
unsubscribe_url = "%s/?Action=Unsubscribe&SubscriptionArn=%s" % (
external_url,
subscriber["SubscriptionArn"],
)
response = lambda_api.process_sns_notification(
subscriber["Endpoint"],
topic_arn,
subscriber["SubscriptionArn"],
message,
message_id,
message_attributes,
unsubscribe_url,
subject=req_data.get("Subject", [None])[0],
)
if isinstance(response, Response):
response.raise_for_status()
elif isinstance(response, FlaskResponse):
if response.status_code >= 400:
raise Exception("Error response (code %s): %s" %
(response.status_code, response.data))
except Exception as exc:
LOG.info("Unable to run Lambda function on SNS message: %s %s" %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
return
elif subscriber["Protocol"] in ["http", "https"]:
msg_type = (req_data.get("Type") or ["Notification"])[0]
try:
message_body = create_sns_message_body(subscriber, req_data,
message_id)
except Exception:
return
try:
response = requests.post(
subscriber["Endpoint"],
headers={
"Content-Type": "text/plain",
# AWS headers according to
# https://docs.aws.amazon.com/sns/latest/dg/sns-message-and-json-formats.html#http-header
"x-amz-sns-message-type": msg_type,
"x-amz-sns-topic-arn": subscriber["TopicArn"],
"x-amz-sns-subscription-arn":
subscriber["SubscriptionArn"],
"User-Agent": "Amazon Simple Notification Service Agent",
},
data=message_body,
verify=False,
)
response.raise_for_status()
except Exception as exc:
LOG.info(
"Received error on sending SNS message, putting to DLQ (if configured): %s"
% exc)
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
return
elif subscriber["Protocol"] == "application":
try:
sns_client = aws_stack.connect_to_service("sns")
sns_client.publish(TargetArn=subscriber["Endpoint"],
Message=message)
except Exception as exc:
LOG.warning(
"Unable to forward SNS message to SNS platform app: %s %s" %
(exc, traceback.format_exc()))
sns_error_to_dead_letter_queue(subscriber["SubscriptionArn"],
req_data, str(exc))
return
elif subscriber["Protocol"] == "email":
ses_client = aws_stack.connect_to_service("ses")
if subscriber.get("Endpoint"):
ses_client.verify_email_address(
EmailAddress=subscriber.get("Endpoint"))
ses_client.verify_email_address(
EmailAddress="*****@*****.**")
ses_client.send_email(
Source="*****@*****.**",
Message={
"Body": {
"Text": {
"Data": message
}
},
"Subject": {
"Data": "SNS-Subscriber-Endpoint"
},
},
Destination={"ToAddresses": [subscriber.get("Endpoint")]},
)
else:
LOG.warning('Unexpected protocol "%s" for SNS subscription' %
subscriber["Protocol"])
def update_sns(method,
path,
data,
headers,
response=None,
return_forward_info=False):
if return_forward_info:
if method == 'POST' and path == '/':
req_data = urlparse.parse_qs(data)
req_action = req_data['Action'][0]
topic_arn = req_data.get('TargetArn') or req_data.get('TopicArn')
if topic_arn:
topic_arn = topic_arn[0]
if topic_arn not in SNS_SUBSCRIPTIONS:
SNS_SUBSCRIPTIONS[topic_arn] = []
if req_action == 'SetSubscriptionAttributes':
sub = get_subscription_by_arn(req_data['SubscriptionArn'][0])
if not sub:
return make_error(
message='Unable to find subscription for given ARN',
code=400)
attr_name = req_data['AttributeName'][0]
attr_value = req_data['AttributeValue'][0]
sub[attr_name] = attr_value
return make_response(req_action)
elif req_action == 'GetSubscriptionAttributes':
sub = get_subscription_by_arn(req_data['SubscriptionArn'][0])
if not sub:
return make_error(
message='Unable to find subscription for given ARN',
code=400)
content = '<Attributes>'
for key, value in sub.items():
content += '<entry><key>%s</key><value>%s</value></entry>\n' % (
key, value)
content += '</Attributes>'
return make_response(req_action, content=content)
elif req_action == 'Subscribe':
if 'Endpoint' not in req_data:
return make_error(
message='Endpoint not specified in subscription',
code=400)
elif req_action == 'Publish':
message = req_data['Message'][0]
sqs_client = aws_stack.connect_to_service('sqs')
for subscriber in SNS_SUBSCRIPTIONS[topic_arn]:
if subscriber['Protocol'] == 'sqs':
queue_name = subscriber['Endpoint'].split(':')[5]
queue_url = subscriber.get('sqs_queue_url')
if not queue_url:
queue_url = aws_stack.get_sqs_queue_url(queue_name)
subscriber['sqs_queue_url'] = queue_url
sqs_client.send_message(
QueueUrl=queue_url,
MessageBody=create_sns_message_body(
subscriber, req_data))
elif subscriber['Protocol'] == 'lambda':
lambda_api.process_sns_notification(
subscriber['Endpoint'],
topic_arn,
message,
subject=req_data.get('Subject'))
elif subscriber['Protocol'] == 'http':
requests.post(subscriber['Endpoint'],
headers={
'Content-Type': 'text/plain',
'x-amz-sns-message-type':
'Notification'
},
data=json.dumps({
'Type': 'Notification',
'Message': message,
}))
else:
LOGGER.warning(
'Unexpected protocol "%s" for SNS subscription' %
subscriber['Protocol'])
# return response here because we do not want the request to be forwarded to SNS
return make_response(req_action)
return True
else:
# This branch is executed by the proxy after we've already received a
# response from the backend, hence we can utilize the "reponse" variable here
if method == 'POST' and path == '/':
req_data = urlparse.parse_qs(data)
req_action = req_data['Action'][0]
if req_action == 'Subscribe' and response.status_code < 400:
response_data = xmltodict.parse(response.content)
topic_arn = (req_data.get('TargetArn')
or req_data.get('TopicArn'))[0]
sub_arn = response_data['SubscribeResponse'][
'SubscribeResult']['SubscriptionArn']
subscription = {
# http://docs.aws.amazon.com/cli/latest/reference/sns/get-subscription-attributes.html
'TopicArn': topic_arn,
'Endpoint': req_data['Endpoint'][0],
'Protocol': req_data['Protocol'][0],
'SubscriptionArn': sub_arn,
'RawMessageDelivery': 'false'
}
SNS_SUBSCRIPTIONS[topic_arn].append(subscription)