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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 | 3x 3x 3x 3x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x 4x | import * as cdk from '@aws-cdk/core';
import * as iam from '@aws-cdk/aws-iam';
import * as apigateway from '@aws-cdk/aws-apigateway';
export interface GenericRestApiAwsIntegrationProps {
/**
* The RestApi resource to which a method will be added and integrated with the AWS service
*/
restApiResource: apigateway.Resource;
/**
* The status code returned by RestApi on a successful request
*
* @default "200"
*/
successResponseStatusCode?: string;
/**
* The status code returned by RestApi on a failing request
*
* @default "503"
*/
failureResponseStatusCode?: string;
}
export abstract class GenericRestApiAwsIntegration extends cdk.Construct {
/** @returns RestApi::Method to which the AwsIntegration was integrated to */
protected readonly restApiMethod: apigateway.Method;
protected abstract configureAwsService(id:string, props: GenericRestApiAwsIntegrationProps) : void;
protected abstract init(id:string, props: GenericRestApiAwsIntegrationProps) : void;
// configured in init method
protected awsService: string
protected integrationHttpVerb = 'POST'
protected integrationPath = "/"
protected requestTemplates: { [contentType: string]: string; } = {}
protected successResponseTemplates: { [contentType: string]: string; } = {}
protected failureResponseTemplates: { [contentType: string]: string; } = {}
public readonly integrationRole: iam.IRole
protected constructor(scope: cdk.Construct, id: string, props: GenericRestApiAwsIntegrationProps) {
super(scope, id);
this.init(id,props)
this.integrationRole = this.addIntegrationRole(id)
const awsIntegration = this.addIntegration(props)
this.restApiMethod = props.restApiResource.addMethod(this.integrationHttpVerb, awsIntegration, {
methodResponses: [{
statusCode: props.failureResponseStatusCode || "503",
responseModels: {
"application/json": apigateway.Model.EMPTY_MODEL
}
}, {
statusCode: props.successResponseStatusCode || "200",
responseModels: {
"application/json": apigateway.Model.EMPTY_MODEL
}
}
]
})
this.configureAwsService(id,props)
}
private addIntegration(props: GenericRestApiAwsIntegrationProps) {
const awsIntegration = new apigateway.AwsIntegration({
service: this.awsService,
path: this.integrationPath,
options: {
credentialsRole: this.integrationRole,
passthroughBehavior: apigateway.PassthroughBehavior.NEVER,
requestParameters: {
"integration.request.header.Content-Type": "'application/x-www-form-urlencoded'"
},
// useful for working with these templates: http://mapping-template-checker.toqoz.net/
// variable reference: https://docs.aws.amazon.com/apigateway/latest/developerguide/api-gateway-mapping-template-reference.html
requestTemplates: this.requestTemplates,
integrationResponses: [
{
statusCode: props.failureResponseStatusCode || "503",
responseTemplates: this.failureResponseTemplates,
// https://docs.aws.amazon.com/apigateway/api-reference/resource/integration-response/#selectionPattern
selectionPattern: "" // --> this is the default response
},
{
selectionPattern: "200",
statusCode: props.successResponseStatusCode || "200",
responseTemplates: this.successResponseTemplates
}
]
}
})
return awsIntegration
}
private addIntegrationRole(id: string) {
return new iam.Role(this, `${id}-${this.awsService}-integration-role`, {
assumedBy: new iam.ServicePrincipal('apigateway.amazonaws.com')
})
}
}
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