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• REST integration:

  • aREST API exposed via the API Gateway allows to query weather events.
  • aCLI client app queries this REST endpoint
  • API keys are configured to limit traffic (usage/quotas)
  • authentication is based on mutual TLS

• websocket integration:

  • a websocket endpoint is exposed on the API Gateway
  • theon-connect lambda keeps track of the currently connected websocket clients
  • thews-push lambda is notified when events are added to DynamoDB and forwards them to all currently connected websocket clients
  • aCLI websocket client streams weather events from the websocket endpoint and prints them

• both the REST and websocket endpoints are exposed on a custom DNS domain

• adata generator lambda, triggered every minute, adds random weather events to DynamoDB

• handle SIGINT correcty in ws socket client
• add Webocket security: API key? Or first request a temp token through REST, then pass it in theconnect ws phase
• add OpenAPI spec to REST endpoint

• AWS GO SDK v2https://aws.github.io/aws-sdk-go-v2/docs/making-requests/

• Go lambda handlerhttps://docs.aws.amazon.com/lambda/latest/dg/golang-handler.html

• Lambda events for each kind of integrationhttps://github.com/aws/aws-lambda-go/tree/main/events

• API client, operations, and parameter types for Amazon DynamoDBhttps://pkg.go.dev/github.com/aws/aws-sdk-go-v2/service/dynamodb#Client

• Types and functions to create Amazon DynamoDB Expression strings, ExpressionAttributeNames maps, and ExpressionAttributeValues mapshttps://pkg.go.dev/github.com/aws/aws-sdk-go-v2/feature/dynamodb/expression#hdr-Using_the_Package

• Marshal slices, maps, structs, and scalar values to and from the AttributeValue typehttps://pkg.go.dev/github.com/aws/aws-sdk-go-v2/feature/dynamodb/attributevalue

• AWS GO SDK exampleshttps://github.com/awsdocs/aws-doc-sdk-examples/tree/main/go

• API Gateways usage plans and API keyshttps://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-api-usage-plans.html

• Blog on mutual TLS using the API Gatewayhttps://aws.amazon.com/blogs/compute/introducing-mutual-tls-authentication-for-amazon-api-gateway/