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@suss/contract-aws-apigateway

v0.33.1

Published

Turn an AWS API Gateway REST or HTTP API into a suss contract and check it against the Lambda handlers and clients that use it.

Vulnerabilities

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Links

Git

Maintainers

mattkindymattkindy

Keywords

sussstatic-analysisawsapi-gatewaylambdaapi-contractapi-drift

Readme

@suss/contract-aws-apigateway

Part of suss, which reads both sides of every call in a repository and says where the two disagree.

Generate suss BehavioralSummary[] for AWS API Gateway resources (REST + HTTP API), independent of how they were deployed.

What this package is

@suss/contract-aws-apigateway is a resource-semantics stub: given a normalized configuration, it knows what an API Gateway endpoint does (status codes, authorizer behavior, CORS preflight, throttling). It does not know how someone wrote that configuration; a manifest reader does that job (@suss/contract-cloudformation, future CDK/Terraform readers), parsing its source format and handing a normalized config to this package.

This separation means: configure your API in CloudFormation, CDK, SAM, or Terraform, and the same resource semantics produce the same summary.

Where it fits

packages/contract/
  openapi/              # Spec → summaries (declares what the API claims to be)
  aws-apigateway/       # Resource semantics: what AWS API Gateway actually does
  cloudformation/       # Manifest reader: walks CFN/SAM, builds configs, delegates here
  (future) cdk-synth/   # Same delegation pattern
  (future) terraform/   # Same delegation pattern

Why configuration matters

A handler that only returns 200 produces a much larger behavioral envelope once it's deployed behind API Gateway: an authorizer adds 401/403, request validation adds 400, throttling adds 429, integration timeouts add 504, CORS adds an OPTIONS preflight endpoint. Without modeling these, a consumer that handles 429 looks like it has a dead branch, when in reality the platform produces 429 even though the handler doesn't.

These transitions are emitted with confidence.source: "derived" and an opaque Predicate of the form platform:apiGateway:<contract>. Each transition's metadata records where the transition came from (which configuration field introduced it) for inspect/diff output, so consumers do not have to work out the platform cause themselves.

More

Coverage

coverage

License

Licensed under Apache 2.0. See LICENSE.