Serverless Swagger API
This is a serverless plugin that simplifies the process of creating an AWS API Gateway from a swagger file.
Installation
yarn add --dev serverless-swagger-apiConfiguration
Lambda Functions
You must manually create your own lambda functions in the serverless configuration. Once the methods are created, they will be referenced in the swagger file.
Swagger File
Add a x-lambda-name property to every path method to bind a part of the api to a lambda. Values specified for x-lambda-name is AWS CloudFormation resource names, i.e., values in the form of {normalizedFunctionName}LambdaFunction. For more information about naming rules, please refer to the description in the Serverless Framework documentation.
paths:
/testPath:
get:
x-lambda-name: TestPathLambdaFunction
...CORS Configuration
Add a x-cors property to the path you want to add CORS options responses to.
paths:
/testPath:
x-cors: trueIf you want to specify a specific attribute, provide one of the following properties
| Property | Description | Default |
|---|---|---|
| origin | A string specifying allowed origins | * |
| headers | An array of headers to be allowed | Constructed from the parameters property of every path method |
| methods | An array of methods to be allowed | Constructed by looking at all methods defined for a path |
Plugin Settings
Now you need to tell the swagger api plugin about your configuration file. Add a swaggerApi property to the custom section of your serverless configuration. You can add as many apis as you want by adding children to the swaggerApi.apis property.
updateDeployments
Will automatically update API gateway deployments if not set to false.
usePackageVersion
The info.version value in your OpenAPI file will be overwritten with the version in package.json.
apis
An object containing all of the APIs to be defined in this stack.
custom:
swaggerApi:
updateDeployments: true
usePackageVersion: true
apis:
PrimaryApi:
Name: ${self:provider.stage}-${self:service}-PrimaryApi
Body: ${file(./some-swagger-file.yaml)}
Lambda: ExampleLambdaFunction
Stage: devProperties
Each API object has the following properties
| Name | Required | Description |
|---|---|---|
| Name | Yes | Name of the API that will be used as the Name parameter when creating the AWS::ApiGateway::RestApi CloudFormation object |
| Body | Yes | The swagger/openapi file that defines the API |
| Stage | Yes | The name of the API Gateway stage that will be created |
| Lambda | No | Default lambda name that will be used if x-lambda-name isn't provided on a path (see the description of x-lambda-name for the value to be specified as the name) |
Created Resources
IAM Roles
An IAM role is created for each API with the name PrimaryApiServiceRole
