def rest_api(self, event_streams, event_replayer):
rest_api = _api_gtw.RestApi(self, "{}RestApi".format(self.stack_id))
rest_api.add_usage_plan("RestApiUsagePlan",
api_key=_api_gtw.ApiKey(self, "TestApiKey"),
api_stages=[
_api_gtw.UsagePlanPerApiStage(
api=rest_api,
stage=rest_api.deployment_stage)
])
api_role = _iam.Role(
self,
"RestApiRole",
assumed_by=_iam.ServicePrincipal('apigateway.amazonaws.com'))
api_role.add_to_policy(
_iam.PolicyStatement(
actions=['firehose:PutRecord'],
resources=[stream.attr_arn for stream in event_streams]))
for stream in event_streams:
stream_resource = rest_api.root.add_resource(
path_part=stream.delivery_stream_name.lower(), )
stream_resource.add_method(
'POST',
api_key_required=True,
integration=_api_gtw.Integration(
type=_api_gtw.IntegrationType.AWS,
uri=
"arn:aws:apigateway:eu-west-1:firehose:action/PutRecord",
integration_http_method='POST',
options=_api_gtw.IntegrationOptions(
credentials_role=api_role,
passthrough_behavior=_api_gtw.PassthroughBehavior.
NEVER,
request_parameters={
'integration.request.header.Content-Type':
"'application/x-amz-json-1.1'"
},
request_templates={
'application/json':
json.dumps({
"DeliveryStreamName":
stream.delivery_stream_name,
"Record": {
"Data": "$util.base64Encode($input.body)"
}
})
},
integration_responses=[
_api_gtw.IntegrationResponse(status_code="200")
])),
method_responses=[_api_gtw.MethodResponse(status_code="200")])
replay = stream_resource.add_resource(path_part='replay')
replay.add_method(
http_method='POST',
integration=_api_gtw.LambdaIntegration(event_replayer),
method_responses=[
_api_gtw.MethodResponse(status_code="202"),
_api_gtw.MethodResponse(status_code="400")
])
def __init__(self, scope: core.Construct, construct_id: str,
apigw_role: _iam.Role, eventBus: _events.EventBus, **kwargs):
super().__init__(scope, construct_id, **kwargs)
integrationOptions = \
_apigw.IntegrationOptions(
credentials_role=apigw_role,
request_parameters={
"integration.request.header.X-Amz-Target": "'AWSEvents.PutEvents'",
"integration.request.header.Content-Type": "'application/x-amz-json-1.1'",
},
request_templates={
"application/json":'#set($language=$input.params(\'language\'))\n{"Entries": [{"Source": "com.amazon.alexa.$language", "Detail": ' + \
'"$util.escapeJavaScript($input.body)",' + \
' "Resources": ["resource1", "resource2"], "DetailType": "myDetailType", "EventBusName": "' + eventBus.event_bus_name + '"}]}'
},
integration_responses=[_apigw.IntegrationResponse(
status_code="200",
response_templates={"application/json": ""},
)]
)
# Integration API Gateway with EventBridge
integrationEventBridge = _apigw.Integration(
type=_apigw.IntegrationType("AWS"),
integration_http_method="POST",
options=integrationOptions,
uri=
f"arn:aws:apigateway:{os.environ['CDK_DEFAULT_REGION']}:events:path//"
)
myApi = _apigw.RestApi(self, construct_id)
# myApi.root.add_method("POST",
# integrationEventBridge,
# method_responses=[
# _apigw.MethodResponse(
# status_code="200"
# )
# ]
# )
languageResource = myApi.root.add_resource("{language}")
languageResource.add_method(
"POST",
integrationEventBridge,
method_responses=[_apigw.MethodResponse(status_code="200")],
request_models={"application/json": self.getModel(myApi)},
request_validator=_apigw.RequestValidator(
self,
"myValidator",
rest_api=myApi,
validate_request_body=True))
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
###
# Let's create our own Event Bus for this rather than using default
###
bus = events.EventBus(self,
'DestinedEventBus',
event_bus_name='the-destined-lambda')
###
# Destinations need invoked Asynchronously so let's use SNS
###
topic = sns.Topic(self,
'theDestinedLambdaTopic',
display_name='The Destined Lambda CDK Pattern Topic')
###
# Lambda configured with success and failure destinations
# Note the actual lambda has no EventBridge code inside it
###
destined_lambda = _lambda.Function(
self,
"destinedLambda",
runtime=_lambda.Runtime.NODEJS_12_X,
handler="destinedLambda.handler",
code=_lambda.Code.from_asset("lambda_fns"),
retry_attempts=0,
on_success=destinations.EventBridgeDestination(event_bus=bus),
on_failure=destinations.EventBridgeDestination(event_bus=bus))
topic.add_subscription(
subscriptions.LambdaSubscription(destined_lambda))
###
# This is a lambda that will be called by onSuccess for destinedLambda
# It simply prints the event it receives to the cloudwatch logs
###
success_lambda = _lambda.Function(
self,
"successLambda",
runtime=_lambda.Runtime.NODEJS_12_X,
handler="success.handler",
code=_lambda.Code.from_asset("lambda_fns"),
timeout=core.Duration.seconds(3))
###
# EventBridge Rule to send events to our success lambda
# Notice how we can still do event filtering based on the json payload returned by the destined lambda
###
success_rule = events.Rule(
self,
'successRule',
event_bus=bus,
description=
'all success events are caught here and logged centrally',
event_pattern=events.EventPattern(
detail={
"requestContext": {
"condition": ["Success"]
},
"responsePayload": {
"source": ["cdkpatterns.the-destined-lambda"],
"action": ["message"]
}
}))
success_rule.add_target(targets.LambdaFunction(success_lambda))
###
# This is a lambda that will be called by onFailure for destinedLambda
# It simply prints the event it receives to the cloudwatch logs.
# Notice how it includes the message that came into destined lambda to make it fail so you have
# everything you need to do retries or manually investigate
###
failure_lambda = _lambda.Function(
self,
"failureLambda",
runtime=_lambda.Runtime.NODEJS_12_X,
handler="failure.handler",
code=_lambda.Code.from_asset("lambda_fns"),
timeout=core.Duration.seconds(3))
###
# EventBridge Rule to send events to our failure lambda
###
failure_rule = events.Rule(
self,
'failureRule',
event_bus=bus,
description=
'all failure events are caught here and logged centrally',
event_pattern=events.EventPattern(
detail={"responsePayload": {
"errorType": ["Error"]
}}))
failure_rule.add_target(targets.LambdaFunction(failure_lambda))
###
# API Gateway Creation
# This is complicated because it transforms the incoming json payload into a query string url
# this url is used to post the payload to sns without a lambda inbetween
###
gateway = api_gw.RestApi(
self,
'theDestinedLambdaAPI',
deploy_options=api_gw.StageOptions(
metrics_enabled=True,
logging_level=api_gw.MethodLoggingLevel.INFO,
data_trace_enabled=True,
stage_name='prod'))
# Give our gateway permissions to interact with SNS
api_gw_sns_role = iam.Role(
self,
'ApiGatewaySNSRole',
assumed_by=iam.ServicePrincipal('apigateway.amazonaws.com'))
topic.grant_publish(api_gw_sns_role)
# shortening the lines of later code
schema = api_gw.JsonSchema
schema_type = api_gw.JsonSchemaType
# Because this isn't a proxy integration, we need to define our response model
response_model = gateway.add_model(
'ResponseModel',
content_type='application/json',
model_name='ResponseModel',
schema=schema(
schema=api_gw.JsonSchemaVersion.DRAFT4,
title='pollResponse',
type=schema_type.OBJECT,
properties={'message': schema(type=schema_type.STRING)}))
error_response_model = gateway.add_model(
'ErrorResponseModel',
content_type='application/json',
model_name='ErrorResponseModel',
schema=schema(schema=api_gw.JsonSchemaVersion.DRAFT4,
title='errorResponse',
type=schema_type.OBJECT,
properties={
'state': schema(type=schema_type.STRING),
'message': schema(type=schema_type.STRING)
}))
request_template = "Action=Publish&" + \
"TargetArn=$util.urlEncode('" + topic.topic_arn + "')&" + \
"Message=please $input.params().querystring.get('mode')&" + \
"Version=2010-03-31"
# This is the VTL to transform the error response
error_template = {
"state": 'error',
"message": "$util.escapeJavaScript($input.path('$.errorMessage'))"
}
error_template_string = json.dumps(error_template,
separators=(',', ':'))
# This is how our gateway chooses what response to send based on selection_pattern
integration_options = api_gw.IntegrationOptions(
credentials_role=api_gw_sns_role,
request_parameters={
'integration.request.header.Content-Type':
"'application/x-www-form-urlencoded'"
},
request_templates={"application/json": request_template},
passthrough_behavior=api_gw.PassthroughBehavior.NEVER,
integration_responses=[
api_gw.IntegrationResponse(
status_code='200',
response_templates={
"application/json":
json.dumps({"message": 'Message added to SNS topic'})
}),
api_gw.IntegrationResponse(
selection_pattern="^\[Error\].*",
status_code='400',
response_templates={
"application/json": error_template_string
},
response_parameters={
'method.response.header.Content-Type':
"'application/json'",
'method.response.header.Access-Control-Allow-Origin':
"'*'",
'method.response.header.Access-Control-Allow-Credentials':
"'true'"
})
])
# Add an SendEvent endpoint onto the gateway
gateway.root.add_resource('SendEvent') \
.add_method('GET', api_gw.Integration(type=api_gw.IntegrationType.AWS,
integration_http_method='POST',
uri='arn:aws:apigateway:us-east-1:sns:path//',
options=integration_options
),
method_responses=[
api_gw.MethodResponse(status_code='200',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials': True
},
response_models={
'application/json': response_model
}),
api_gw.MethodResponse(status_code='400',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials': True
},
response_models={
'application/json': error_response_model
}),
]
)
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
api_name='voncv'
cert_arn='arn:aws:acm:us-east-1:921279086507:certificate/1cdc5fa6-0978-4c3c-96fa-ced4188b4fd0'
# Example automatically generated. See https://github.com/aws/jsii/issues/826
cert = acm.Certificate.from_certificate_arn(self,"cert",cert_arn)
domain_name='voncv.sema4.com'
domain_obj=api.DomainNameOptions(certificate=cert, domain_name=domain_name)
#domain_name_obj=api.DefaultDomainMappingOptions( domain_name=domain_obj1, mapping_key=None)
integration_uri='http://voncwesprod.sema4.com:3000'
#classaws_cdk.aws_apigateway.HttpIntegration(url, *, http_method=None, options=None, proxy=None)
#base_api=api.HttpApi(self, 'rootapi', api_name=api_name, cors_preflight=None, create_default_stage=None, default_domain_mapping=domain_name_obj)
# , default_integration=None)
base_api = api.RestApi(self, "RestApi",rest_api_name=api_name,domain_name=domain_obj,
deploy=False
)
integration_response_200=api.IntegrationResponse(status_code='200')
integration_response_400=api.IntegrationResponse(status_code='400',selection_pattern='400')
integration_response_401=api.IntegrationResponse(status_code='401',selection_pattern='401')
integration_response_404=api.IntegrationResponse(status_code='400',selection_pattern='404')
integration_response_405=api.IntegrationResponse(status_code='401',selection_pattern='405')
integration_response_500=api.IntegrationResponse(status_code='401',selection_pattern='500')
integration_response_all=[integration_response_200,
integration_response_400,
integration_response_401,
integration_response_404,
integration_response_405,
integration_response_500
]
integration_options=api.IntegrationOptions(integration_responses=integration_response_all)
#method_reponse=api.IntegrationOptions(integration_responses=integration_response_all)
mr=[
api.MethodResponse(status_code='200'),
api.MethodResponse(status_code='400'),
api.MethodResponse(status_code='401'),
api.MethodResponse(status_code='404'),
api.MethodResponse(status_code='405'),
api.MethodResponse(status_code='500')
]
integration=api.Integration(type=api.IntegrationType.HTTP,integration_http_method='POST',uri=integration_uri,options=integration_options)
control = base_api.root.add_resource('control')
control_get=control.add_method('POST',integration)
control_controlid=control.add_resource('{controlid}')
control_controlid_post=control_controlid.add_method('POST',integration)
control_controlid_sample=control_controlid.add_resource('sample')
control_controlid_sample_sampleid=control_controlid_sample.add_resource('sampleid')
control_controlid_sample_sampleid_get=control_controlid_sample_sampleid.add_method('GET',integration,method_responses=mr)
control_controlid_sample_sampleid_pipelineoutput=control_controlid_sample_sampleid.add_resource('pipeline_output')
control_controlid_sample_sampleid_pipelineoutput_post=control_controlid_sample_sampleid_pipelineoutput.add_method('POST',integration)
getalllpatients = base_api.root.add_resource('getallpatients')
getalllpatients_get=getalllpatients.add_method('GET',integration)
patient = base_api.root.add_resource('patient')
patient_post = patient.add_method('GET',integration)
patient_get = patient.add_method('POST',integration)
patientid=patient.add_resource('patientid')
patient_put=patientid.add_method('PUT',integration)
patient_get=patientid.add_method('GET',integration)
patient_case=patientid.add_resource('case')
patient_case_post=patient_case.add_method('POST',integration)
patient_case_caseid=patient_case.add_resource('caseid')
patient_case_caseid_get= patient_case_caseid.add_method('GET',integration)
patient_case_caseid_put= patient_case_caseid.add_method('PUT',integration)
patient_case_caseid_close=patient_case_caseid.add_resource('close')
patient_case_caseid_close_post=patient_case_caseid_close.add_method('PUT',integration)
patient_case_caseid_curate=patient_case_caseid.add_resource('curate')
patient_case_caseid_curate_post=patient_case_caseid_curate.add_method('POST',integration)
patient_case_caseid_fail=patient_case_caseid.add_resource('fail')
patient_case_caseid_fail_post=patient_case_caseid_fail.add_method('POST',integration)
patient_case_caseid_reopen=patient_case_caseid.add_resource('reopen')
patient_case_caseid_reopen_post=patient_case_caseid_reopen.add_method('POST',integration)
patient_case_caseid_sample=patient_case_caseid.add_resource('sample')
patient_case_caseid_sample_sampleid=patient_case_caseid_sample.add_resource('sampleid')
patient_case_caseid_sample_sampleid_get=patient_case_caseid_sample_sampleid.add_method('GET',integration)
patient_case_caseid_sample_sampleid_fail=patient_case_caseid_sample_sampleid.add_resource('fail')
patient_case_caseid_sample_sampleid_fail_post=patient_case_caseid_sample_sampleid_fail.add_method('POST',integration)
patient_case_caseid_sample_sampleid_pipelineoutput=patient_case_caseid_sample_sampleid.add_resource('pipeline-output')
patient_case_caseid_sample_sampleid_pipelineoutput_post=patient_case_caseid_sample_sampleid_pipelineoutput.add_method('POST',integration)
patient_case_caseid_variant=patient_case_caseid.add_resource('variant')
patient_case_caseid_variant_post=patient_case_caseid.add_method('POST',integration)
def __init__(self, scope: core.Construct, id: str, stack_log_level: str,
back_end_api_name: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
# Create Serverless Event Processor using Lambda):
# Read Lambda Code):
try:
with open(
"api_with_stage_variables/stacks/back_end/lambda_src/serverless_greeter.py",
mode="r") as f:
greeter_fn_code = f.read()
except OSError as e:
print("Unable to read Lambda Function Code")
raise e
greeter_fn = _lambda.Function(
self,
"secureGreeterFn",
function_name=f"greeter_fn_{id}",
runtime=_lambda.Runtime.PYTHON_3_7,
handler="index.lambda_handler",
code=_lambda.InlineCode(greeter_fn_code),
timeout=core.Duration.seconds(15),
reserved_concurrent_executions=20,
environment={
"LOG_LEVEL": f"{stack_log_level}",
"Environment": "Production",
"ANDON_CORD_PULLED": "False",
"RANDOM_SLEEP_ENABLED": "False"
},
description=
"A simple greeter function, which responds with a timestamp")
greeter_fn_version = greeter_fn.latest_version
greeter_fn_version_alias = _lambda.Alias(
self,
"greeterFnMystiqueAutomationAlias",
alias_name="MystiqueAutomation",
version=greeter_fn_version)
greeter_fn_dev_alias = _lambda.Alias(self,
"greeterFnDevAlias",
alias_name="dev",
version=greeter_fn_version)
greeter_fn_test_alias = _lambda.Alias(self,
"greeterFnTestAlias",
alias_name="test",
version=greeter_fn_version)
greeter_fn_prod_alias = _lambda.Alias(self,
"greeterFnProdAlias",
alias_name="prod",
version=greeter_fn_version)
# Create Custom Loggroup
# /aws/lambda/function-name
greeter_fn_lg = _logs.LogGroup(
self,
"greeterFnLoggroup",
log_group_name=f"/aws/lambda/{greeter_fn.function_name}",
retention=_logs.RetentionDays.ONE_WEEK,
removal_policy=core.RemovalPolicy.DESTROY)
# %%
# Create API Gateway
wa_api = _apigw.RestApi(
self,
"backEnd01Api",
rest_api_name=f"{back_end_api_name}",
# deploy_options=wa_api_dev_stage_options,
retain_deployments=False,
deploy=False,
endpoint_types=[_apigw.EndpointType.EDGE],
description=
f"{GlobalArgs.OWNER}: API Best Practices. Stage Variables for APIs. This stack deploys an API and integrates with Lambda using Stage Variables."
)
wa_api_logs = _logs.LogGroup(
self,
"waApiLogs",
log_group_name=f"/aws/apigateway/{back_end_api_name}/access_logs",
removal_policy=core.RemovalPolicy.DESTROY,
retention=_logs.RetentionDays.ONE_DAY)
######################################
## CONFIG FOR API STAGE : DEV ##
######################################
dev_wa_api_deploy = _apigw.Deployment(
self,
"devDeploy",
api=wa_api,
description=f"{GlobalArgs.OWNER}: Deployment of 'dev' Api Stage",
retain_deployments=False)
dev_api_stage = _apigw.Stage(
self,
"devStage",
deployment=dev_wa_api_deploy,
stage_name="miztiik-dev",
throttling_rate_limit=10,
throttling_burst_limit=100,
# Log full requests/responses data
data_trace_enabled=True,
# Enable Detailed CloudWatch Metrics
metrics_enabled=True,
logging_level=_apigw.MethodLoggingLevel.INFO,
access_log_destination=_apigw.LogGroupLogDestination(wa_api_logs),
variables={"lambdaAlias": "dev"})
# wa_api.deployment_stage = dev_api_stage
test_wa_api_deploy = _apigw.Deployment(
self,
"testDeploy",
api=wa_api,
description=f"{GlobalArgs.OWNER}: Deployment of 'test' Api Stage",
retain_deployments=False)
test_api_stage = _apigw.Stage(
self,
"testStage",
deployment=test_wa_api_deploy,
stage_name="miztiik-test",
throttling_rate_limit=10,
throttling_burst_limit=100,
# Log full requests/responses data
data_trace_enabled=True,
# Enable Detailed CloudWatch Metrics
metrics_enabled=True,
logging_level=_apigw.MethodLoggingLevel.INFO,
access_log_destination=_apigw.LogGroupLogDestination(wa_api_logs),
variables={"lambdaAlias": "test"})
wa_api.deployment_stage = test_api_stage
prod_wa_api_deploy = _apigw.Deployment(
self,
"prodDeploy",
api=wa_api,
description=f"{GlobalArgs.OWNER}: Deployment of 'prod' Api Stage",
retain_deployments=False)
prod_api_stage = _apigw.Stage(
self,
"prodStage",
deployment=prod_wa_api_deploy,
stage_name="miztiik-prod",
throttling_rate_limit=10,
throttling_burst_limit=100,
# Log full requests/responses data
data_trace_enabled=True,
# Enable Detailed CloudWatch Metrics
metrics_enabled=True,
logging_level=_apigw.MethodLoggingLevel.INFO,
access_log_destination=_apigw.LogGroupLogDestination(wa_api_logs),
variables={"lambdaAlias": "prod"})
prod_api_stage.node.add_dependency(test_api_stage)
wa_api.deployment_stage = prod_api_stage
wa_api_res = wa_api.root.add_resource("wa-api")
greeter = wa_api_res.add_resource("greeter")
backend_stage_uri = (f"arn:aws:apigateway:"
f"{core.Aws.REGION}"
f":lambda:path/2015-03-31/functions/"
f"{greeter_fn.function_arn}"
f":"
f"${{stageVariables.lambdaAlias}}"
f"/invocations")
greeter_method_get = greeter.add_method(
http_method="GET",
request_parameters={
"method.request.header.InvocationType": True,
"method.request.path.mystique": True
},
# integration=_apigw.LambdaIntegration(
# # handler=greeter_fn,
# handler=backend_stage_uri,
# proxy=True
# )
integration=_apigw.Integration(
type=_apigw.IntegrationType.AWS_PROXY,
integration_http_method="GET",
uri=backend_stage_uri))
# "arn:aws:apigateway:eu-west-2:lambda:path/2015-03-31/functions/arn:aws:lambda:eu-west-2:614517326458:function:${stageVariables.preflightFunction}/invocations",
# https://lambda.us-east-1.amazonaws.com/2015-03-31/functions/arn:aws:lambda:us-east-1:230023004178:function:greeter_fn_well-architected-api:${stageVariable.lambdaAlias}/invocations
# We need to manually add permissions for the stages to invoke
# CDK By default adds permission only for the last .deployment_stage
#####################################################################
## CDK BUG: CONDITIONS DOES NOT TAKE EFFECT IN SERVICE PRINCIPAL ##
#####################################################################
"""
greeter_fn.grant_invoke(
_iam.ServicePrincipal(
service="apigateway.amazonaws.com",
conditions={
"ArnLike": {"aws:SourceArn": "this-does-not-work"}
}
)
)
"""
greeter_fn.add_permission(
"allowStageInvocation",
principal=_iam.ServicePrincipal("apigateway.amazonaws.com"),
# source_arn=f"arn:aws:execute-api:{core.Aws.REGION}:{core.Aws.ACCOUNT_ID}:{wa_api.rest_api_id}/{dev_api_stage.stage_name}/{greeter_method_get.resource.path}"
source_arn=greeter_method_get.method_arn.replace(
wa_api.deployment_stage.stage_name, "*"),
action="lambda:InvokeFunction",
)
greeter_fn_dev_alias.add_permission(
"greeter_fn_devAliasApiPerms",
principal=_iam.ServicePrincipal("apigateway.amazonaws.com"),
action="lambda:InvokeFunction",
source_arn=greeter_method_get.method_arn.replace(
wa_api.deployment_stage.stage_name, "*"),
)
greeter_fn_test_alias.add_permission(
"greeter_fn_testAliasApiPerms",
principal=_iam.ServicePrincipal("apigateway.amazonaws.com"),
action="lambda:InvokeFunction",
source_arn=greeter_method_get.method_arn.replace(
wa_api.deployment_stage.stage_name, "*"),
)
greeter_fn_prod_alias.add_permission(
"greeter_fn_prodAliasApiPerms",
principal=_iam.ServicePrincipal("apigateway.amazonaws.com"),
action="lambda:InvokeFunction",
source_arn=greeter_method_get.method_arn.replace(
wa_api.deployment_stage.stage_name, "*"),
)
# Outputs
output_0 = core.CfnOutput(
self,
"AutomationFrom",
value=f"{GlobalArgs.SOURCE_INFO}",
description=
"To know more about this automation stack, check out our github page."
)
output_1 = core.CfnOutput(
self,
"WaApiUrl",
value=f"{greeter.url}",
description=
"Use an utility like curl from the same VPC as the API to invoke it."
)
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
# DynamoDB Table
# Streaming is enabled to send the whole new object down the pipe
table = dynamo_db.Table(self,
"TheDynamoStreamer",
partition_key=dynamo_db.Attribute(
name="message",
type=dynamo_db.AttributeType.STRING),
stream=dynamo_db.StreamViewType.NEW_IMAGE)
# defines an AWS Lambda resource
subscriber_lambda = _lambda.Function(
self,
"DynamoLambdaHandler",
runtime=_lambda.Runtime.PYTHON_3_8,
handler="lambda.handler",
code=_lambda.Code.from_asset("lambda_fns/subscribe"))
subscriber_lambda.add_event_source(
_event.DynamoEventSource(
table=table,
starting_position=_lambda.StartingPosition.LATEST))
# API Gateway Creation
gateway = api_gw.RestApi(
self,
'DynamoStreamerAPI',
deploy_options=api_gw.StageOptions(
metrics_enabled=True,
logging_level=api_gw.MethodLoggingLevel.INFO,
data_trace_enabled=True,
stage_name='prod'))
# Give our gateway permissions to interact with dynamodb
api_gw_dynamo_role = iam.Role(
self,
'DefaultLambdaHanderRole',
assumed_by=iam.ServicePrincipal('apigateway.amazonaws.com'))
table.grant_read_write_data(api_gw_dynamo_role)
# shortening the lines of later code
schema = api_gw.JsonSchema
schema_type = api_gw.JsonSchemaType
# Because this isn't a proxy integration, we need to define our response model
response_model = gateway.add_model(
'ResponseModel',
content_type='application/json',
model_name='ResponseModel',
schema=schema(
schema=api_gw.JsonSchemaVersion.DRAFT4,
title='pollResponse',
type=schema_type.OBJECT,
properties={'message': schema(type=schema_type.STRING)}))
error_response_model = gateway.add_model(
'ErrorResponseModel',
content_type='application/json',
model_name='ErrorResponseModel',
schema=schema(schema=api_gw.JsonSchemaVersion.DRAFT4,
title='errorResponse',
type=schema_type.OBJECT,
properties={
'state': schema(type=schema_type.STRING),
'message': schema(type=schema_type.STRING)
}))
# This is the VTL to transform our incoming JSON to a Dynamo Insert Query
request_template = {
"TableName": table.table_name,
"Item": {
"message": {
"S": "$input.path('$.message')"
}
}
}
request_template_string = json.dumps(request_template,
separators=(',', ':'))
# This is the VTL to transform the error response
error_template = {
"state": 'error',
"message": "$util.escapeJavaScript($input.path('$.errorMessage'))"
}
error_template_string = json.dumps(error_template,
separators=(',', ':'))
# This is how our gateway chooses what response to send based on selection_pattern
integration_options = api_gw.IntegrationOptions(
credentials_role=api_gw_dynamo_role,
request_templates={"application/json": request_template_string},
passthrough_behavior=api_gw.PassthroughBehavior.NEVER,
integration_responses=[
api_gw.IntegrationResponse(
status_code='200',
response_templates={
"application/json":
json.dumps({"message": 'item added to db'})
}),
api_gw.IntegrationResponse(
selection_pattern="^\[BadRequest\].*",
status_code='400',
response_templates={
"application/json": error_template_string
},
response_parameters={
'method.response.header.Content-Type':
"'application/json'",
'method.response.header.Access-Control-Allow-Origin':
"'*'",
'method.response.header.Access-Control-Allow-Credentials':
"'true'"
})
])
# Add an InsertItem endpoint onto the gateway
gateway.root.add_resource('InsertItem') \
.add_method('POST', api_gw.Integration(type=api_gw.IntegrationType.AWS,
integration_http_method='POST',
uri='arn:aws:apigateway:us-east-1:dynamodb:action/PutItem',
options=integration_options
),
method_responses=[
api_gw.MethodResponse(status_code='200',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials': True
},
response_models={
'application/json': response_model
}),
api_gw.MethodResponse(status_code='400',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials': True
},
response_models={
'application/json': error_response_model
}),
]
)
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
## Create S3 Bucket. We'll populate it seperately.
bucket_name="{}-s3-ecs-apigw-test".format(core.Aws.ACCOUNT_ID)
bucket = s3.Bucket(self, "s3-ecs-apigw-test",
bucket_name=bucket_name,
versioned=True,
public_read_access=False
)
## Create ECS Cluster, Taks and Service
### Create the VPC for the demo
vpc = ec2.Vpc(self, "MyVpc", max_azs=3)
### Create the ECS Cluster
cluster = ecs.Cluster(self,
"ecs-apigw-test-cluster",
cluster_name="ecs-apigw-test-cluster",
container_insights=True,
vpc=vpc)
### Using the Network LoadBalance Fargate patterm, this wills create the container definition, the task definition, the service and the Network load balancer for it.
ecs_deploy = ecsp.NetworkLoadBalancedFargateService(self,
"ecs-apigw-test",
cluster=cluster,
cpu=512,
desired_count=2,
public_load_balancer=False,
memory_limit_mib=2048,
task_image_options=ecsp.NetworkLoadBalancedTaskImageOptions(
image=ecs.ContainerImage.from_registry("strm/helloworld-http")
),
health_check_grace_period=core.Duration.minutes(5)
)
### Have to add an Ingress rule to allow traffic through. This applies the CIDR of the VPC.
ecs_deploy.service.connections.security_groups[0].add_ingress_rule(
ec2.Peer.ipv4(vpc.vpc_cidr_block),
ec2.Port(
protocol=ec2.Protocol.TCP,
string_representation="",
from_port=80,
to_port=80
)
)
## Create API Gateway resources
### Create the VPC Link to the Network Load Balancer
vpc_link =apigw.VpcLink(self,
"ecs-test-vpc-link",
targets = [ecs_deploy.load_balancer])
### Create the API
api = apigw.RestApi(self, "ecs-s3-test-api",
rest_api_name="ECS S3 Test API",
description="Test API for distributing traffic to S3 and ECS",
binary_media_types=["image/png"])
### Create the execution role for the API methods.
rest_api_role = iam.Role(
self,
"RestAPIRole",
assumed_by=iam.ServicePrincipal("apigateway.amazonaws.com"),
managed_policies=[iam.ManagedPolicy.from_aws_managed_policy_name("AmazonS3ReadOnlyAccess")])
### Generic Method Response that can be used with each API method
method_response = apigw.MethodResponse(status_code="200",
response_parameters={"method.response.header.Content-Type": True})
### Root URI
root_integration_response = apigw.IntegrationResponse(
status_code="200",
response_templates={"text/html": "$input.path('$')"},
response_parameters={"method.response.header.Content-Type": "'text/html'"})
root_integration_options = apigw.IntegrationOptions(
credentials_role=rest_api_role,
integration_responses=[root_integration_response],
request_templates={"application/json": "Action=SendMessage&MessageBody=$input.body"},
passthrough_behavior=apigw.PassthroughBehavior.NEVER,
request_parameters={
"integration.request.header.Content-Type": "'application/x-www-form-urlencoded'"})
root_resource_s3_integration = apigw.AwsIntegration(
service="s3",
integration_http_method="GET",
subdomain=bucket_name,
path="index.html",
options=root_integration_options)
root_method = api.root.add_method("GET",
root_resource_s3_integration,
method_responses=[method_response])
### API URI
api_integration = apigw.Integration(
type=apigw.IntegrationType.HTTP_PROXY,
uri="http://{}".format(ecs_deploy.load_balancer.load_balancer_dns_name),
integration_http_method="GET",
options={
"connection_type": apigw.ConnectionType.VPC_LINK,
"vpc_link": vpc_link
}
)
apis = api.root.add_resource("apis")
apii = apis.add_resource("{api}")
# apis = api.root.add_resource("apis")
apii_get = apii.add_method("GET",
api_integration,
method_responses=[method_response],
request_parameters={
"method.request.path.api": True,})
## Add Images URI
image_integration_response = apigw.IntegrationResponse(
status_code="200",
content_handling=apigw.ContentHandling.CONVERT_TO_BINARY,
# response_templates={"text/html": "$input.path('$')"},
response_parameters={"method.response.header.Content-Type": "'image/png'"})
image_integration_options = apigw.IntegrationOptions(
credentials_role=rest_api_role,
integration_responses=[image_integration_response],
request_templates={"application/json": "Action=SendMessage&MessageBody=$input.body"},
passthrough_behavior=apigw.PassthroughBehavior.NEVER,
request_parameters={
"integration.request.header.Content-Type": "'application/x-www-form-urlencoded'",
"integration.request.path.image": "method.request.path.image"})
images_resource_s3_integration = apigw.AwsIntegration(
service="s3",
integration_http_method="GET",
subdomain=bucket_name,
path="images/{image}",
options=image_integration_options)
images_resource = api.root.add_resource("images")
image_resource = images_resource.add_resource("{image}")
images_get = image_resource.add_method("GET",
images_resource_s3_integration,
method_responses=[method_response],
request_parameters={
"method.request.path.image": True,})
## Fall Through
folder = api.root.add_resource("{folder}")
item = folder.add_resource("{item}")
integration_response = apigw.IntegrationResponse(
status_code="200",
response_templates={"text/html": "$input.path('$')"},
response_parameters={"method.response.header.Content-Type": "'text/html'"})
s3_proxy_integration_options = apigw.IntegrationOptions(
credentials_role=rest_api_role,
integration_responses=[integration_response],
request_templates={"application/json": "Action=SendMessage&MessageBody=$input.body"},
passthrough_behavior=apigw.PassthroughBehavior.NEVER,
request_parameters={
"integration.request.header.Content-Type": "'application/x-www-form-urlencoded'",
"integration.request.path.item": "method.request.path.item",
"integration.request.path.folder": "method.request.path.folder"})
s3_proxy_resource_s3_integration = apigw.AwsIntegration(
service="s3",
integration_http_method="GET",
subdomain=bucket_name,
path="{folder}/{item}",
options=s3_proxy_integration_options)
item_get = item.add_method("GET",
s3_proxy_resource_s3_integration,
method_responses=[method_response],
request_parameters={
"method.request.path.item": True,
"method.request.path.folder": True
}
)
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
my_api = apigw.RestApi(
self,
"SageMakerAPI",
default_cors_preflight_options=apigw.CorsOptions(
allow_origins=["*"], allow_headers=["*"], allow_methods=["*"]))
endpoint_name = self.node.try_get_context("endpoint_name")
options = apigw.IntegrationOptions(
credentials_role=iam.Role(
self,
"SMInvoke",
assumed_by=iam.ServicePrincipal("apigateway"),
inline_policies={
"FullSageMaker":
iam.PolicyDocument(statements=[
iam.PolicyStatement(actions=["*"], resources=["*"])
])
}),
integration_responses=[
apigw.IntegrationResponse(
status_code="200",
response_templates={"application/json": ""},
response_parameters={
"method.response.header.Access-Control-Allow-Headers":
"'*'",
"method.response.header.Access-Control-Allow-Methods":
"'*'",
"method.response.header.Access-Control-Allow-Origin":
"'*'"
})
])
integration = apigw.Integration(
type=apigw.IntegrationType.AWS,
uri=
"arn:aws:apigateway:us-east-1:runtime.sagemaker:path/endpoints/{}/invocations"
.format(self.node.try_get_context("endpoint_name")),
integration_http_method="POST",
options=options)
apigw.Method(
self,
"PostRoot",
http_method="POST",
resource=my_api.root,
integration=integration,
options=apigw.MethodOptions(method_responses=[
apigw.MethodResponse(
status_code="200",
response_parameters={
"method.response.header.Access-Control-Allow-Methods":
True,
"method.response.header.Access-Control-Allow-Headers":
True,
"method.response.header.Access-Control-Allow-Origin":
True
})
]))
def __init__(self, scope: core.Construct, construct_id: str,
**kwargs) -> None:
super().__init__(scope, construct_id, **kwargs)
# Create two VPCs - one to host our private website, the other to act as a client
website_vpc = Vpc(
self,
"WEBSITEVPC",
cidr="10.0.0.0/16",
)
client_vpc = Vpc(
self,
"ClientVPC",
cidr="10.1.0.0/16",
)
# Create a bastion host in the client API which will act like our client workstation
bastion = BastionHostLinux(
self,
"WEBClient",
vpc=client_vpc,
instance_name='my-bastion',
instance_type=InstanceType('t3.micro'),
machine_image=AmazonLinuxImage(),
subnet_selection=SubnetSelection(subnet_type=SubnetType.PRIVATE),
security_group=SecurityGroup(
scope=self,
id='bastion-sg',
security_group_name='bastion-sg',
description=
'Security group for the bastion, no inbound open because we should access'
' to the bastion via AWS SSM',
vpc=client_vpc,
allow_all_outbound=True))
# Set up a VPC peering connection between client and API VPCs, and adjust
# the routing table to allow connections back and forth
VpcPeeringHelper(self, 'Peering', website_vpc, client_vpc)
# Create VPC endpoints for API gateway
vpc_endpoint = InterfaceVpcEndpoint(
self,
'APIGWVpcEndpoint',
vpc=website_vpc,
service=InterfaceVpcEndpointAwsService.APIGATEWAY,
private_dns_enabled=True,
)
vpc_endpoint.connections.allow_from(bastion, Port.tcp(443))
endpoint_id = vpc_endpoint.vpc_endpoint_id
api_policy = iam.PolicyDocument(statements=[
iam.PolicyStatement(principals=[iam.AnyPrincipal()],
actions=['execute-api:Invoke'],
resources=['execute-api:/*'],
effect=iam.Effect.DENY,
conditions={
"StringNotEquals": {
"aws:SourceVpce": endpoint_id
}
}),
iam.PolicyStatement(principals=[iam.AnyPrincipal()],
actions=['execute-api:Invoke'],
resources=['execute-api:/*'],
effect=iam.Effect.ALLOW)
])
# Create an s3 bucket to hold the content
content_bucket = s3.Bucket(self,
"ContentBucket",
removal_policy=core.RemovalPolicy.DESTROY)
# Upload our static content to the bucket
s3dep.BucketDeployment(self,
"DeployWithInvalidation",
sources=[s3dep.Source.asset('website')],
destination_bucket=content_bucket)
# Create a private API GW in the API VPC
api = apigw.RestApi(self,
'PrivateS3Api',
endpoint_configuration=apigw.EndpointConfiguration(
types=[apigw.EndpointType.PRIVATE],
vpc_endpoints=[vpc_endpoint]),
policy=api_policy)
# Create a role to allow API GW to access our S3 bucket contents
role = iam.Role(
self,
"Role",
assumed_by=iam.ServicePrincipal("apigateway.amazonaws.com"))
role.add_to_policy(
iam.PolicyStatement(effect=iam.Effect.ALLOW,
resources=[
content_bucket.bucket_arn,
content_bucket.bucket_arn + '/*'
],
actions=["s3:Get*"]))
# Create a proxy resource that captures all non-root resource requests
resource = api.root.add_resource("{proxy+}")
# Create an integration with S3
resource_integration = apigw.Integration(
type=apigw.IntegrationType.AWS,
integration_http_method='GET',
options=apigw.IntegrationOptions(
request_parameters=
{ # map the proxy parameter so we can pass the request path
"integration.request.path.proxy":
"method.request.path.proxy"
},
integration_responses=[
apigw.IntegrationResponse(
status_code='200',
response_parameters=
{ # map the content type of the S3 object back to the HTTP response
"method.response.header.Content-Type":
"integration.response.header.Content-Type"
})
],
credentials_role=role),
# reference the bucket content we want to retrieve
uri='arn:aws:apigateway:eu-west-1:s3:path/%s/{proxy}' %
(content_bucket.bucket_name))
# handle the GET request and map it to our new integration
resource.add_method(
"GET",
resource_integration,
method_responses=[
apigw.MethodResponse(status_code='200',
response_parameters={
"method.response.header.Content-Type":
False
})
],
request_parameters={"method.request.path.proxy": True})
# Handle requests to the root of our site
# Create another integration with S3 - this time with no proxy parameter
resource_integration = apigw.Integration(
type=apigw.IntegrationType.AWS,
integration_http_method='GET',
options=apigw.IntegrationOptions(
integration_responses=[
apigw.IntegrationResponse(
status_code='200',
response_parameters=
{ # map the content type of the S3 object back to the HTTP response
"method.response.header.Content-Type":
"integration.response.header.Content-Type"
})
],
credentials_role=role),
# reference the bucket content we want to retrieve
uri='arn:aws:apigateway:eu-west-1:s3:path/%s/index.html' %
(content_bucket.bucket_name))
# handle the GET request and map it to our new integration
api.root.add_method("GET",
resource_integration,
method_responses=[
apigw.MethodResponse(
status_code='200',
response_parameters={
"method.response.header.Content-Type":
False
})
])
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
###
# SNS Topic Creation
# Our API Gateway posts messages directly to this
###
topic = sns.Topic(self,
'theBigFanTopic',
display_name='The Big Fan CDK Pattern Topic')
###
# SQS Subscribers creation for our SNS Topic
# 2 subscribers, one for messages with a status of created one for any other message
###
# Status:created SNS Subscriber Queue
created_status_queue = sqs.Queue(
self,
'BigFanTopicStatusCreatedSubscriberQueue',
visibility_timeout=core.Duration.seconds(300),
queue_name='BigFanTopicStatusCreatedSubscriberQueue')
# Only send messages to our created_status_queue with a status of created
created_filter = sns.SubscriptionFilter.string_filter(
whitelist=['created'])
topic.add_subscription(
subscriptions.SqsSubscription(
created_status_queue,
raw_message_delivery=True,
filter_policy={'status': created_filter}))
# Any other status SNS Subscriber Queue
other_status_queue = sqs.Queue(
self,
'BigFanTopicAnyOtherStatusSubscriberQueue',
visibility_timeout=core.Duration.seconds(300),
queue_name='BigFanTopicAnyOtherStatusSubscriberQueue')
# Only send messages to our other_status_queue that do not have a status of created
other_filter = sns.SubscriptionFilter.string_filter(
blacklist=['created'])
topic.add_subscription(
subscriptions.SqsSubscription(
other_status_queue,
raw_message_delivery=True,
filter_policy={'status': other_filter}))
###
# Creation of Lambdas that subscribe to above SQS queues
###
# Created status queue lambda
sqs_created_status_subscriber = _lambda.Function(
self,
"SQSCreatedStatusSubscribeLambdaHandler",
runtime=_lambda.Runtime.NODEJS_12_X,
handler="createdStatus.handler",
code=_lambda.Code.from_asset("lambda_fns/subscribe"))
created_status_queue.grant_consume_messages(
sqs_created_status_subscriber)
sqs_created_status_subscriber.add_event_source(
_event.SqsEventSource(created_status_queue))
# Any other status queue lambda
sqs_other_status_subscriber = _lambda.Function(
self,
"SQSAnyOtherStatusSubscribeLambdaHandler",
runtime=_lambda.Runtime.NODEJS_12_X,
handler="anyOtherStatus.handler",
code=_lambda.Code.from_asset("lambda_fns/subscribe"))
other_status_queue.grant_consume_messages(sqs_other_status_subscriber)
sqs_other_status_subscriber.add_event_source(
_event.SqsEventSource(other_status_queue))
###
# API Gateway Creation
# This is complicated because it transforms the incoming json payload into a query string url
# this url is used to post the payload to sns without a lambda inbetween
###
gateway = api_gw.RestApi(
self,
'theBigFanAPI',
deploy_options=api_gw.StageOptions(
metrics_enabled=True,
logging_level=api_gw.MethodLoggingLevel.INFO,
data_trace_enabled=True,
stage_name='prod'))
# Give our gateway permissions to interact with SNS
api_gw_sns_role = iam.Role(
self,
'DefaultLambdaHanderRole',
assumed_by=iam.ServicePrincipal('apigateway.amazonaws.com'))
topic.grant_publish(api_gw_sns_role)
# shortening the lines of later code
schema = api_gw.JsonSchema
schema_type = api_gw.JsonSchemaType
# Because this isn't a proxy integration, we need to define our response model
response_model = gateway.add_model(
'ResponseModel',
content_type='application/json',
model_name='ResponseModel',
schema=schema(
schema=api_gw.JsonSchemaVersion.DRAFT4,
title='pollResponse',
type=schema_type.OBJECT,
properties={'message': schema(type=schema_type.STRING)}))
error_response_model = gateway.add_model(
'ErrorResponseModel',
content_type='application/json',
model_name='ErrorResponseModel',
schema=schema(schema=api_gw.JsonSchemaVersion.DRAFT4,
title='errorResponse',
type=schema_type.OBJECT,
properties={
'state': schema(type=schema_type.STRING),
'message': schema(type=schema_type.STRING)
}))
request_template = "Action=Publish&" + \
"TargetArn=$util.urlEncode('" + topic.topic_arn + "')&" + \
"Message=$util.urlEncode($input.path('$.message'))&" + \
"Version=2010-03-31&" + \
"MessageAttributes.entry.1.Name=status&" + \
"MessageAttributes.entry.1.Value.DataType=String&" + \
"MessageAttributes.entry.1.Value.StringValue=$util.urlEncode($input.path('$.status'))"
# This is the VTL to transform the error response
error_template = {
"state": 'error',
"message": "$util.escapeJavaScript($input.path('$.errorMessage'))"
}
error_template_string = json.dumps(error_template,
separators=(',', ':'))
# This is how our gateway chooses what response to send based on selection_pattern
integration_options = api_gw.IntegrationOptions(
credentials_role=api_gw_sns_role,
request_parameters={
'integration.request.header.Content-Type':
"'application/x-www-form-urlencoded'"
},
request_templates={"application/json": request_template},
passthrough_behavior=api_gw.PassthroughBehavior.NEVER,
integration_responses=[
api_gw.IntegrationResponse(
status_code='200',
response_templates={
"application/json":
json.dumps({"message": 'message added to topic'})
}),
api_gw.IntegrationResponse(
selection_pattern="^\[Error\].*",
status_code='400',
response_templates={
"application/json": error_template_string
},
response_parameters={
'method.response.header.Content-Type':
"'application/json'",
'method.response.header.Access-Control-Allow-Origin':
"'*'",
'method.response.header.Access-Control-Allow-Credentials':
"'true'"
})
])
# Add an SendEvent endpoint onto the gateway
gateway.root.add_resource('SendEvent') \
.add_method('POST', api_gw.Integration(type=api_gw.IntegrationType.AWS,
integration_http_method='POST',
uri='arn:aws:apigateway:us-east-1:sns:path//',
options=integration_options
),
method_responses=[
api_gw.MethodResponse(status_code='200',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials': True
},
response_models={
'application/json': response_model
}),
api_gw.MethodResponse(status_code='400',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials': True
},
response_models={
'application/json': error_response_model
}),
]
)
def __init__(self, scope: core.Construct, id: str, **kwargs) -> None:
super().__init__(scope, id, **kwargs)
###
# SNS Topic Creation
# Our API Gateway posts messages directly to this
###
topic = sns.Topic(self,
'TheXRayTracerSnsFanOutTopic',
display_name='The XRay Tracer Fan Out Topic')
self.sns_topic_arn = topic.topic_arn
###
# API Gateway Creation
# This is complicated because it is a direct SNS integration through VTL not a proxy integration
# Tracing is enabled for X-Ray
###
gateway = api_gw.RestApi(
self,
'xrayTracerAPI',
deploy_options=api_gw.StageOptions(
metrics_enabled=True,
logging_level=api_gw.MethodLoggingLevel.INFO,
data_trace_enabled=True,
tracing_enabled=True,
stage_name='prod'))
# Give our gateway permissions to interact with SNS
api_gw_sns_role = iam.Role(
self,
'ApiGatewaySNSRole',
assumed_by=iam.ServicePrincipal('apigateway.amazonaws.com'))
topic.grant_publish(api_gw_sns_role)
# shortening the lines of later code
schema = api_gw.JsonSchema
schema_type = api_gw.JsonSchemaType
# Because this isn't a proxy integration, we need to define our response model
response_model = gateway.add_model(
'ResponseModel',
content_type='application/json',
model_name='ResponseModel',
schema=schema(
schema=api_gw.JsonSchemaVersion.DRAFT4,
title='pollResponse',
type=schema_type.OBJECT,
properties={'message': schema(type=schema_type.STRING)}))
error_response_model = gateway.add_model(
'ErrorResponseModel',
content_type='application/json',
model_name='ErrorResponseModel',
schema=schema(schema=api_gw.JsonSchemaVersion.DRAFT4,
title='errorResponse',
type=schema_type.OBJECT,
properties={
'state': schema(type=schema_type.STRING),
'message': schema(type=schema_type.STRING)
}))
request_template = "Action=Publish&" + \
"TargetArn=$util.urlEncode('" + topic.topic_arn + "')&" + \
"Message=$util.urlEncode($context.path)&" + \
"Version=2010-03-31"
# This is the VTL to transform the error response
error_template = {
"state": 'error',
"message": "$util.escapeJavaScript($input.path('$.errorMessage'))"
}
error_template_string = json.dumps(error_template,
separators=(',', ':'))
# This is how our gateway chooses what response to send based on selection_pattern
integration_options = api_gw.IntegrationOptions(
credentials_role=api_gw_sns_role,
request_parameters={
'integration.request.header.Content-Type':
"'application/x-www-form-urlencoded'"
},
request_templates={"application/json": request_template},
passthrough_behavior=api_gw.PassthroughBehavior.NEVER,
integration_responses=[
api_gw.IntegrationResponse(
status_code='200',
response_templates={
"application/json":
json.dumps({"message": 'message added to topic'})
}),
api_gw.IntegrationResponse(
selection_pattern="^\[Error\].*",
status_code='400',
response_templates={
"application/json": error_template_string
},
response_parameters={
'method.response.header.Content-Type':
"'application/json'",
'method.response.header.Access-Control-Allow-Origin':
"'*'",
'method.response.header.Access-Control-Allow-Credentials':
"'true'"
})
])
method_responses = [
api_gw.MethodResponse(
status_code='200',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials':
True
},
response_models={'application/json': response_model}),
api_gw.MethodResponse(
status_code='400',
response_parameters={
'method.response.header.Content-Type': True,
'method.response.header.Access-Control-Allow-Origin': True,
'method.response.header.Access-Control-Allow-Credentials':
True
},
response_models={'application/json': error_response_model}),
]
# Add a / endpoint onto the gateway
gateway.root \
.add_method('GET', api_gw.Integration(type=api_gw.IntegrationType.AWS,
integration_http_method='POST',
uri='arn:aws:apigateway:us-east-1:sns:path//',
options=integration_options
),
method_responses=method_responses
)
# Add a {proxy+} endpoint onto the gateway
gateway.root.add_resource('{proxy+}') \
.add_method('GET', api_gw.Integration(type=api_gw.IntegrationType.AWS,
integration_http_method='POST',
uri='arn:aws:apigateway:us-east-1:sns:path//',
options=integration_options
),
method_responses=method_responses
)
def __init__(self, scope: cdk.Construct, construct_id: str, **kwargs) -> None:
super().__init__(scope, construct_id, **kwargs)
# Create a Lambda function
# Code in ./src directory
lambda_fn = lambda_.Function(
self, "MyFunction",
runtime=lambda_.Runtime.PYTHON_3_9,
handler="index.handler",
code=lambda_.Code.from_asset(os.path.join(DIRNAME, "src"))
)
#Input parameter for custom domain name created for API Gateway, ex: apis.example.com
custom_domain_name = cdk.CfnParameter(self, "customdomainname", type="String",
description="The custom domain name for AWS REST API Gateway")
#Input parameter for ACM certificate arn
certificate_arn = cdk.CfnParameter(self, "certificatearn", type="String",
description="The ACM certificate ARN for custom domain name")
#Input parameter for s3 bucket name that has truststore pem file
truststore_bucket = cdk.CfnParameter(self, "truststorebucket", type="String",
description="The S3 trustsore uri for custom domain name")
#Input parameter for public hosted zone id
public_zone_id = cdk.CfnParameter(self, "publiczoneid", type="String",
description="The public hosted zone id to create a record for custom domain name")
#Input parameter for public hosted zone id
public_zone_name = cdk.CfnParameter(self, "publiczonename", type="String",
description="The public hosted zone name to create a record for custom domain name")
# Create the Rest API
rest_api = apigateway.RestApi(
self, "TLSRestAPI",
endpoint_types=[apigateway.EndpointType.REGIONAL],
description="RestAPI Gateway to verify mutual TLS",
deploy=False,
retain_deployments=False,
disable_execute_api_endpoint=True
)
# Create the custom domain
api_domain = apigateway.DomainName(
self, "MyDomainName",
domain_name=custom_domain_name.value_as_string,
certificate=acm.Certificate.from_certificate_arn(self, "cert", certificate_arn.value_as_string),
mtls=apigateway.MTLSConfig(
bucket=s3.Bucket.from_bucket_name(self, "Bucket", truststore_bucket.value_as_string),
key="/truststore.pem"
),
security_policy=apigateway.SecurityPolicy.TLS_1_2
)
# Create API deployment
deployment = apigateway.Deployment(
self, "Deployment",
api=rest_api,
retain_deployments=False
)
# Create prod Stage for deployment
stage = apigateway.Stage(
self, "prod",
deployment=deployment,
)
# Create API mapping to custom domain
base_path_mapping = apigateway.BasePathMapping(self, "MyBasePathMapping",
domain_name=api_domain,
rest_api=rest_api,
stage=stage
)
#Get public hosted zone object
public_zone = route53.HostedZone.from_hosted_zone_attributes(self, "publiczone", hosted_zone_id=public_zone_id.value_as_string,zone_name=public_zone_name.value_as_string)
#Create A record for custom domain name in public hosted zone
#Record name will be taken from custom domain name, ex: for apis.example.com, record name will be apis
record = route53.ARecord(self, 'MyAliasRecord',
zone=public_zone,
record_name=cdk.Fn.select(0,cdk.Fn.split('.',custom_domain_name.value_as_string)),
target=route53.RecordTarget.from_alias(targets.ApiGatewayDomain(api_domain))
)
rest_api.deployment_stage = stage
# Create URI for lambda function
stage_uri = f"arn:aws:apigateway:{cdk.Aws.REGION}:lambda:path/2015-03-31/functions/{lambda_fn.function_arn}/invocations"
# Create Lambda Integration
integration = apigateway.Integration(
type=apigateway.IntegrationType.AWS_PROXY,
integration_http_method="POST",
uri=stage_uri
)
# Create APIGW Method
method = rest_api.root.add_method("GET", integration)
# Add Lambda permissions
lambda_fn.add_permission(
"lambdaPermission",
action="lambda:InvokeFunction",
principal=iam.ServicePrincipal("apigateway.amazonaws.com"),
source_arn=method.method_arn.replace(
rest_api.deployment_stage.stage_name, "*"
)
)
# OUTPUTS
cdk.CfnOutput(self, "LambdaFunction", export_name="MyLambdaFunction", value=lambda_fn.function_arn)
cdk.CfnOutput(self, "ApigwId", export_name="MyAPIGWID", value=rest_api.rest_api_id)
cdk.CfnOutput(self, "CustomDomainName", export_name="MyCustomDomain", value=api_domain.domain_name)
cdk.CfnOutput(self, "CustomDomainHostedZone", export_name="MyCustomeZone", value=api_domain.domain_name_alias_hosted_zone_id)
cdk.CfnOutput(self, "CustomDomainAlias", export_name="MyCustomAlias", value=api_domain.domain_name_alias_domain_name)
def __init__(self, scope: Construct, construct_id: str, **kwargs) -> None:
super().__init__(scope, construct_id, **kwargs)
# Create a Lambda function
# Code in ./src directory
lambda_fn = lambda_.Function(self,
"MyFunction",
runtime=lambda_.Runtime.PYTHON_3_9,
handler="index.handler",
code=lambda_.Code.from_asset(
os.path.join(DIRNAME, "src")))
# Function version
version = lambda_fn.current_version
# Create function alias
alias = lambda_.Alias(self,
"LambdaAlias",
alias_name="Prod",
version=version)
# Create the Rest API
rest_api = apigateway.RestApi(
self,
"RestApi",
endpoint_types=[apigateway.EndpointType.REGIONAL],
deploy=False,
retain_deployments=False)
# Create initial deployment
deployment = apigateway.Deployment(self,
"Deployment",
api=rest_api,
retain_deployments=False)
# Create prod Stage
stage = apigateway.Stage(self,
"prod",
deployment=deployment,
variables={"lambdaAlias": "Prod"})
rest_api.deployment_stage = stage
# Create URI for lambda alias
stage_uri = f"arn:aws:apigateway:{Aws.REGION}:lambda:path/2015-03-31/functions/{lambda_fn.function_arn}:${{stageVariables.lambdaAlias}}/invocations"
# Create Lambda Integration
integration = apigateway.Integration(
type=apigateway.IntegrationType.AWS_PROXY,
integration_http_method="POST",
uri=stage_uri)
# Create APIGW Method
method = rest_api.root.add_method("GET", integration)
# Add Lambda permissions
lambda_fn.add_permission(
"lambdaPermission",
action="lambda:InvokeFunction",
principal=iam.ServicePrincipal("apigateway.amazonaws.com"),
source_arn=method.method_arn.replace(
rest_api.deployment_stage.stage_name, "*"))
# Add permissions for Prod alias
alias.add_permission(
"aliasPermission",
action="lambda:InvokeFunction",
principal=iam.ServicePrincipal("apigateway.amazonaws.com"),
source_arn=method.method_arn.replace(
rest_api.deployment_stage.stage_name, "*"))
# OUTPUTS
CfnOutput(self,
"LambdaFunction",
export_name="MyLambdaFunction",
value=lambda_fn.function_arn)
CfnOutput(self,
"ApigwId",
export_name="MyAPIGWID",
value=rest_api.rest_api_id)
CfnOutput(self,
"MethodArn",
export_name="MyMethodArn",
value=method.method_arn)
CfnOutput(self,
"StageName",
export_name="MyStageName",
value=rest_api.deployment_stage.stage_name)
