@aws/pdk
Version:
All documentation is located at: https://aws.github.io/aws-pdk
94 lines • 13.1 kB
JavaScript
;
var _a;
Object.defineProperty(exports, "__esModule", { value: true });
exports.LambdaIntegration = void 0;
const JSII_RTTI_SYMBOL_1 = Symbol.for("jsii.rtti");
/*! Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.
SPDX-License-Identifier: Apache-2.0 */
const aws_cdk_lib_1 = require("aws-cdk-lib");
const aws_lambda_1 = require("aws-cdk-lib/aws-lambda");
const integration_1 = require("./integration");
const snap_start_java_function_1 = require("../functions/snap-start-java-function");
const utils_1 = require("../spec/utils");
/**
* A lambda integration
*/
class LambdaIntegration extends integration_1.Integration {
constructor(lambdaFunction) {
super();
// Snap Start applies only to versions, so if the function is a SnapStartFunction, we'll reference the current version
if (lambdaFunction instanceof snap_start_java_function_1.SnapStartFunction) {
this.lambdaFunction = lambdaFunction.currentVersion;
}
else {
this.lambdaFunction = lambdaFunction;
}
}
/**
* Render the lambda integration as a snippet of OpenAPI
*/
render(_props) {
return {
type: "AWS_PROXY",
httpMethod: "POST",
uri: (0, utils_1.functionInvocationUri)(this.lambdaFunction),
passthroughBehavior: "WHEN_NO_MATCH",
};
}
getOperationPermissionId(operationId) {
return `LambdaPermission-${operationId}`;
}
/**
* Grant API Gateway permissions to invoke the lambda
*/
grant({ scope, api, operationId, method, path, operationLookup, }) {
// Router permissions are unique to a function
const routerPermissionId = `LambdaRouterPermission-${this.lambdaFunction.node.addr.slice(-8)}`;
// Check if we've already granted a router permission for this lambda
if (scope.node.tryFindChild(routerPermissionId)) {
return; // The function already has access to all operations
}
// Check if a permission has been added for other operations for the same function arn
const otherOperationPermissions = Object.keys(operationLookup)
.map((opId) => scope.node.tryFindChild(this.getOperationPermissionId(opId)))
.filter((permission) => permission &&
permission instanceof aws_lambda_1.CfnPermission &&
permission.functionName === this.lambdaFunction.functionArn);
if (otherOperationPermissions.length > 0) {
// This lambda function is reused, so we add the "router permission" which allows
// invocation for any operation, to save exceeding the policy size limit for large
// numbers of operations.
otherOperationPermissions.forEach((permission) => scope.node.tryRemoveChild(permission.node.id));
new aws_lambda_1.CfnPermission(scope, routerPermissionId, {
action: "lambda:InvokeFunction",
principal: "apigateway.amazonaws.com",
functionName: this.lambdaFunction.functionArn,
sourceArn: aws_cdk_lib_1.Stack.of(scope).formatArn({
service: "execute-api",
resource: api.restApiId,
// Permissions for all
resourceName: "*/*/*",
}),
});
}
else {
// Add an individual operation permission since this lambda is not reused for multiple operations
new aws_lambda_1.CfnPermission(scope, this.getOperationPermissionId(operationId), {
action: "lambda:InvokeFunction",
principal: "apigateway.amazonaws.com",
functionName: this.lambdaFunction.functionArn,
sourceArn: aws_cdk_lib_1.Stack.of(scope).formatArn({
service: "execute-api",
resource: api.restApiId,
// Scope permissions to any stage and a specific method and path of the operation.
// Path parameters (eg {param} are replaced with wildcards)
resourceName: `*/${method.toUpperCase()}${path.replace(/{[^\}]*\}/g, "*")}`,
}),
});
}
}
}
exports.LambdaIntegration = LambdaIntegration;
_a = JSII_RTTI_SYMBOL_1;
LambdaIntegration[_a] = { fqn: "@aws/pdk.type_safe_api.LambdaIntegration", version: "0.26.14" };
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Copyright [Amazon.com](http://amazon.com/), Inc. or its affiliates. All Rights Reserved.\nSPDX-License-Identifier: Apache-2.0 */\nimport { Stack } from \"aws-cdk-lib\";\nimport { CfnPermission, IFunction } from \"aws-cdk-lib/aws-lambda\";\nimport {\n  ApiGatewayIntegration,\n  Integration,\n  IntegrationGrantProps,\n  IntegrationRenderProps,\n} from \"./integration\";\nimport { SnapStartFunction } from \"../functions/snap-start-java-function\";\nimport { functionInvocationUri } from \"../spec/utils\";\n\n/**\n * A lambda integration\n */\nexport class LambdaIntegration extends Integration {\n  private readonly lambdaFunction: IFunction;\n\n  constructor(lambdaFunction: IFunction) {\n    super();\n    // Snap Start applies only to versions, so if the function is a SnapStartFunction, we'll reference the current version\n    if (lambdaFunction instanceof SnapStartFunction) {\n      this.lambdaFunction = lambdaFunction.currentVersion;\n    } else {\n      this.lambdaFunction = lambdaFunction;\n    }\n  }\n\n  /**\n   * Render the lambda integration as a snippet of OpenAPI\n   */\n  public render(_props: IntegrationRenderProps): ApiGatewayIntegration {\n    return {\n      type: \"AWS_PROXY\",\n      httpMethod: \"POST\",\n      uri: functionInvocationUri(this.lambdaFunction),\n      passthroughBehavior: \"WHEN_NO_MATCH\",\n    };\n  }\n\n  private getOperationPermissionId(operationId: string) {\n    return `LambdaPermission-${operationId}`;\n  }\n\n  /**\n   * Grant API Gateway permissions to invoke the lambda\n   */\n  public grant({\n    scope,\n    api,\n    operationId,\n    method,\n    path,\n    operationLookup,\n  }: IntegrationGrantProps) {\n    // Router permissions are unique to a function\n    const routerPermissionId = `LambdaRouterPermission-${this.lambdaFunction.node.addr.slice(\n      -8\n    )}`;\n\n    // Check if we've already granted a router permission for this lambda\n    if (scope.node.tryFindChild(routerPermissionId)) {\n      return; // The function already has access to all operations\n    }\n\n    // Check if a permission has been added for other operations for the same function arn\n    const otherOperationPermissions = Object.keys(operationLookup)\n      .map((opId) =>\n        scope.node.tryFindChild(this.getOperationPermissionId(opId))\n      )\n      .filter(\n        (permission) =>\n          permission &&\n          permission instanceof CfnPermission &&\n          permission.functionName === this.lambdaFunction.functionArn\n      ) as CfnPermission[];\n\n    if (otherOperationPermissions.length > 0) {\n      // This lambda function is reused, so we add the \"router permission\" which allows\n      // invocation for any operation, to save exceeding the policy size limit for large\n      // numbers of operations.\n      otherOperationPermissions.forEach((permission) =>\n        scope.node.tryRemoveChild(permission.node.id)\n      );\n      new CfnPermission(scope, routerPermissionId, {\n        action: \"lambda:InvokeFunction\",\n        principal: \"apigateway.amazonaws.com\",\n        functionName: this.lambdaFunction.functionArn,\n        sourceArn: Stack.of(scope).formatArn({\n          service: \"execute-api\",\n          resource: api.restApiId,\n          // Permissions for all\n          resourceName: \"*/*/*\",\n        }),\n      });\n    } else {\n      // Add an individual operation permission since this lambda is not reused for multiple operations\n      new CfnPermission(scope, this.getOperationPermissionId(operationId), {\n        action: \"lambda:InvokeFunction\",\n        principal: \"apigateway.amazonaws.com\",\n        functionName: this.lambdaFunction.functionArn,\n        sourceArn: Stack.of(scope).formatArn({\n          service: \"execute-api\",\n          resource: api.restApiId,\n          // Scope permissions to any stage and a specific method and path of the operation.\n          // Path parameters (eg {param} are replaced with wildcards)\n          resourceName: `*/${method.toUpperCase()}${path.replace(\n            /{[^\\}]*\\}/g,\n            \"*\"\n          )}`,\n        }),\n      });\n    }\n  }\n}\n"]}