AWS::Serverless::HttpApi - AWS Serverless Application Model

AWS::Serverless::HttpApi

Creates an Amazon API Gateway HTTP API, which enables you to create RESTful APIs with lower latency and lower costs than REST APIs. For more information, see Working with HTTP APIs in the API Gateway Developer Guide.

Syntax

To declare this entity in your AWS Serverless Application Model (AWS SAM) template, use the following syntax.

Properties

AccessLogSettings

The settings for access logging in a stage.

Type: AccessLogSettings

Required: No

AWS CloudFormation compatibility: This property is passed directly to the AccessLogSettings property of an AWS::ApiGatewayV2::Stage resource.

Auth

Configures authorization for controlling access to your API Gateway HTTP API.

For more information, see Controlling access to HTTP APIs with JWT authorizers in the API Gateway Developer Guide.

Type: HttpApiAuth

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

CorsConfiguration

Manages cross-origin resource sharing (CORS) for all your API Gateway HTTP APIs. Specify the domain to allow as a string, or specify an HttpApiCorsConfiguration object. Note that CORS requires AWS SAM to modify your OpenAPI definition, so CORS works only if the DefinitionBody property is specified.

For more information, see Configuring CORS for an HTTP API in the API Gateway Developer Guide.

Note: If CorsConfiguration is set both in an OpenAPI definition and at the property level, then AWS SAM merges both configuration sources with the properties taking precedence.

Note: If this property is set to true, then all origins are allowed.

Type: String | HttpApiCorsConfiguration

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

DefaultRouteSettings

The default route settings for this HTTP API. These settings apply to all routes unless overridden by the RouteSettings property for certain routes.

Type: RouteSettings

Required: No

AWS CloudFormation compatibility: This property is passed directly to the RouteSettings property of an AWS::ApiGatewayV2::Stage resource.

DefinitionBody

The OpenAPI definition that describes your HTTP API. If you don't specify a DefinitionUri or a DefinitionBody, AWS SAM generates a DefinitionBody for you based on your template configuration.

Type: String

Required: No

AWS CloudFormation compatibility: This property is similar to the Body property of an AWS::ApiGatewayV2::Api resource. If certain properties are provided, AWS SAM may insert content into or modify the DefinitionBody before it is passed to AWS CloudFormation. Properties include Auth and an EventSource of type HttpApi for a corresponding AWS::Serverless::Function resource.

DefinitionUri

The Amazon Simple Storage Service (Amazon S3) URI, local file path, or location object of the the OpenAPI definition that defines the HTTP API. The Amazon S3 object that this property references must be a valid OpenAPI definition file. If you don't specify a DefinitionUri or a DefinitionBody are specified, AWS SAM generates a DefinitionBody for you based on your template configuration.

If you provide a local file path, the template must go through the workflow that includes the sam deploy or sam package command for the definition to be transformed properly.

Intrinsic functions are not supported in external OpenApi definition files that you reference with DefinitionUri. To import an OpenApi definition into the template, use the DefinitionBody property with the Include transform.

Type: String | HttpApiDefinition

Required: No

AWS CloudFormation compatibility: This property is similar to the BodyS3Location property of an AWS::ApiGatewayV2::Api resource. The nested Amazon S3 properties are named differently.

Description

A description of the HttpApi resource.

Note: This property requires AWS SAM to modify the HttpApi resource's OpenAPI definition, to set the description field. The following two scenarios result in an error: 1) The DefinitionBody property is specified with the description field set in the OpenAPI definition (since this is a conflict that AWS SAM won't resolve), or 2) The DefinitionUri property is specified (since AWS SAM won't modify an OpenAPI definition that it retrieves from Amazon S3).

Type: String

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

DisableExecuteApiEndpoint

Specifies whether clients can invoke your HTTP API by using the default execute-api endpoint https://{api_id}.execute-api.{region}.amazonaws.com. By default, clients can invoke your API with the default endpoint. To require that clients only use a custom domain name to invoke your API, disable the default endpoint.

Type: Boolean

Required: No

AWS CloudFormation compatibility: This property is passed directly to the DisableExecuteApiEndpoint property of an AWS::ApiGatewayV2::Api resource.

Domain

Configures a custom domain for this API Gateway HTTP API.

Type: HttpApiDomainConfiguration

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

FailOnWarnings

Specifies whether to roll back the HTTP API creation (true) or not (false) when a warning is encountered. The default value is false.

Type: Boolean

Required: No

AWS CloudFormation compatibility: This property is passed directly to the FailOnWarnings property of an AWS::ApiGatewayV2::Api resource.

RouteSettings

The route settings, per route, for this HTTP API. For more information, see Working with routes for HTTP APIs in the API Gateway Developer Guide.

Type: RouteSettings

Required: No

AWS CloudFormation compatibility: This property is passed directly to the RouteSettings property of an AWS::ApiGatewayV2::Stage resource.

StageName

The name of the API stage. If no name is specified, AWS SAM uses the $default stage from API Gateway.

Type: String

Required: No

Default: $default

AWS CloudFormation compatibility: This property is passed directly to the StageName property of an AWS::ApiGatewayV2::Stage resource.

StageVariables

A map that defines the stage variables. Variable names can have alphanumeric and underscore characters. The values must match [A-Za-z0-9-._~:/?#&=,]+.

Type: Json

Required: No

AWS CloudFormation compatibility: This property is passed directly to the StageVariables property of an AWS::ApiGatewayV2::Stage resource.

Tags

A map (string to string) that specifies the tags to add to this API Gateway stage. Keys and values are limited to alphanumeric characters. Keys can be 1 to 127 Unicode characters in length and cannot include the prefix aws:. Values can be 1 to 255 Unicode characters in length.

Type: Map

Required: No

AWS CloudFormation compatibility: This property is unique to AWS SAM and doesn't have an AWS CloudFormation equivalent.

Additional notes: The Tags property requires AWS SAM to modify your OpenAPI definition, so tags are added only if the DefinitionBody property is specified—no tags are added if the DefinitionUri property is specified. AWS SAM automatically adds an httpapi:createdBy:SAM tag. Tags are also added to the AWS::ApiGatewayV2::Stage resource and the AWS::ApiGatewayV2::DomainName resource (if DomainName is specified).

Return Values

Ref

When you pass the logical ID of this resource to the intrinsic Ref function, Ref returns the API ID of the underlying AWS::ApiGatewayV2::Api resource, for example, a1bcdef2gh.

For more information about using the Ref function, see Ref in the AWS CloudFormation User Guide.

Examples

Simple HttpApi

The following example shows the minimum needed to set up an HTTP API endpoint backed by an Lambda function. This example uses the default HTTP API that AWS SAM creates.

YAML

AWSTemplateFormatVersion: '2010-09-09' Description: AWS SAM template with a simple API definition Resources: ApiFunction: Type: AWS::Serverless::Function Properties: Events: ApiEvent: Type: HttpApi Handler: index.handler InlineCode: | def handler(event, context): return {'body': 'Hello World!', 'statusCode': 200} Runtime: python3.7 Transform: AWS::Serverless-2016-10-31

HttpApi with Auth

The following example shows how to set up authorization on HTTP API endpoints.

YAML

Properties: FailOnWarnings: true Auth: DefaultAuthorizer: OAuth2 Authorizers: OAuth2: AuthorizationScopes: - scope4 JwtConfiguration: issuer: "https://www.example.com/v1/connect/oauth2" audience: - MyApi IdentitySource: "$request.querystring.param" OpenIdAuth: AuthorizationScopes: - scope1 - scope2 OpenIdConnectUrl: "https://www.example.com/v1/connect/oidc/.well-known/openid-configuration" JwtConfiguration: issuer: "https://www.example.com/v1/connect/oidc" audience: - MyApi IdentitySource: "$request.querystring.param"

HttpApi with OpenAPI definition

The following example shows how to add an OpenAPI definition to the template.

Note that AWS SAM fills in any missing Lambda integrations for HttpApi events that reference this HTTP API. AWS SAM also also adds any missing paths that HttpApi events reference.

YAML

Properties: FailOnWarnings: true DefinitionBody: info: version: '1.0' title: Ref: AWS::StackName paths: "/": get: security: - OpenIdAuth: - scope1 - scope2 responses: {} openapi: 3.0.1 securitySchemes: OpenIdAuth: type: openIdConnect x-amazon-apigateway-authorizer: identitySource: "$request.querystring.param" type: jwt jwtConfiguration: audience: - MyApi issuer: https://www.example.com/v1/connect/oidc openIdConnectUrl: https://www.example.com/v1/connect/oidc/.well-known/openid-configuration

HttpApi with configuration settings

The following example shows how to add HTTP API and stage configurations to the template.

YAML

AWSTemplateFormatVersion: '2010-09-09' Transform: AWS::Serverless-2016-10-31 Parameters: StageName: Type: String Default: Prod Resources: HttpApiFunction: Type: AWS::Serverless::Function Properties: InlineCode: | def handler(event, context): import json return { "statusCode": 200, "body": json.dumps(event), } Handler: index.handler Runtime: python3.7 Events: ExplicitApi: # warning: creates a public endpoint Type: HttpApi Properties: ApiId: !Ref HttpApi Method: GET Path: /path TimeoutInMillis: 15000 PayloadFormatVersion: "2.0" RouteSettings: ThrottlingBurstLimit: 600 HttpApi: Type: AWS::Serverless::HttpApi Properties: StageName: !Ref StageName Tags: Tag: Value AccessLogSettings: DestinationArn: !GetAtt AccessLogs.Arn Format: $context.requestId DefaultRouteSettings: ThrottlingBurstLimit: 200 RouteSettings: "GET /path": ThrottlingBurstLimit: 500 # overridden in HttpApi Event StageVariables: StageVar: Value FailOnWarnings: true AccessLogs: Type: AWS::Logs::LogGroup Outputs: HttpApiUrl: Description: URL of your API endpoint Value: Fn::Sub: 'https://${HttpApi}.execute-api.${AWS::Region}.${AWS::URLSuffix}/${StageName}/' HttpApiId: Description: Api id of HttpApi Value: Ref: HttpApi