AWS CDK中的请求验证

Question

我通过使用typescript的cdk启用请求验证的努力没有成功。在解决了一些已知的环境总线之后，我得出了如下结论:

const req = new apiGateway.RequestValidator(this, lambdaName, {
restApi: this._api,
requestValidatorName: lambdaName,
validateRequestBody: false,
validateRequestParameters: true
});
// this._methodOptions.requestValidator = {},
this._methodOptions.requestValidator = req;

我收到的错误是TypeError: Cannot read property 'children' of undefined。

TypeError: Cannot read property 'children' of undefined
at synthNestedAssemblies ([e-mail]:50:33)
at synthNestedAssemblies ([e-mail]:54:7)
at synthNestedAssemblies ([e-mail]:54:7)
at synthNestedAssemblies ([e-mail]:54:7)
at Object.synthesize ([e-mail]:14:3)
at App.synth ([e-mail]:188:23)
at process.App.process.once ([e-mail]:123:45)
at Object.onceWrapper (events.js:277:13)
at process.emit (events.js:189:13)
at process.EventEmitter.emit (domain.js:441:20)

我怀疑在引擎盖下还有一些问题。有人知道怎么让它工作吗?

编辑:添加关于如何建立_methodOptions的信息

private _reqValidatorQueryStrHeaders: apiGateway.RequestValidator;

// Create validators to use in method options
private _initValidators() {
this._reqValidatorAll = this._api.addRequestValidator("validate-request-all", {
requestValidatorName: "req-validator-all",
validateRequestBody: true,
validateRequestParameters: true,
});
this._reqValidatorBody = this._api.addRequestValidator("validate-request-body", {
requestValidatorName: "req-validator-body",
validateRequestBody: true,
validateRequestParameters: true,
});
this._reqValidatorQueryStrHeaders = this._api.addRequestValidator("validate-request-query-etc", {
requestValidatorName: "req-validator-query-and-headers",
validateRequestBody: true,
validateRequestParameters: true,
});
}
private _initDefMethodOptions(uniqueId: string) {
this._defMethodOptions = {
// Method Request Quadrant:
// ------------------------

// Cognito Auth
authorizer: {authorizerId: this._auth.ref},
authorizationType: apiGateway.AuthorizationType.COGNITO,
// Request Validation - works *with* requestParameters & requestModels 
requestValidator: {
Name: uniqueId 
},
requestParameters: {
'method.request.querystring.unused': false // required True
},
// apiKeyRequired: false,

// Method Response Quadrant:
// ------------------------
methodResponses: [
{
// Successful response from the integration
statusCode: '200',
// Define what parameters are allowed or not
responseParameters: {
'method.response.header.Access-Control-Allow-Origin': true,
// 'method.response.header.Content-Type': true,
// 'method.response.header.Access-Control-Allow-Credentials': true // don't need this with cognito credentials...
},
// // Validate the schema on the response
// responseModels: {
//   'application/json': responseModel
// }
},
{
// Same thing for the error responses
statusCode: '400',
responseParameters: {    //is this necessary with the api wide default set above?         
'method.response.header.Access-Control-Allow-Origin': true,
//   'method.response.header.Content-Type': true,
//   'method.response.header.Access-Control-Allow-Credentials': true
},
// responseModels: {
//   'application/json': errorResponseModel
// }
},
{
statusCode: '403',
responseParameters: {
'method.response.header.Access-Control-Allow-Origin': true,
},
},
{
statusCode: '500',
responseParameters: {
'method.response.header.Access-Control-Allow-Origin': true,
},
}
]
};
return this._defMethodOptions;
}

/* In other function */
this._methodOptions = this._initDefMethodOptions(lambdaName);
let queryList : string[] = options.reqParams;
if (typeof (queryList) !== "undefined") {
// this._methodOptions.requestValidator = { Name: lambdaName };                      // does nothing. Wrong class. 
// this._methodOptions.requestValidator = this._getRequestValidator(lambdaName);  // crashes!

// Using the fix from answer: 
this._methodOptions.requestValidator = this._reqValidatorQueryStrHeaders;

Answer 1

我们可以将验证器传递给方法选项。

/**
* Basic Rest Api
*/
const myRestApi = new apigateway.RestApi(this, "rest-api", {});
/**
* A Validator
*/
const myValidator = myRestApi.addRequestValidator("validate-request", {
requestValidatorName: "my-request-validator",
validateRequestBody: true,
validateRequestParameters: true,
});
/**
* Simple Method attaching the validator.
*/
const postMethod = myRestApi.root.addMethod(
"POST",
new apigw.MockIntegration(),
{
requestValidator: myValidator,
}
);