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Question 271 - SAP-C02 discussion

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A company runs an unauthenticated static website (www.example.com) that includes a registration form for users. The website uses Amazon S3 for hosting and uses Amazon CloudFront as the content delivery network with AWS WAF configured. When the registration form is submitted, the website calls an Amazon API Gateway API endpoint that invokes an AWS Lambda function to process the payload and forward the payload to an external API call.

<a target='_blank' href='http://www.example.com/'>During testing, a solutions architect encounters a cross-origin resource sharing (CORS) error. The solutions architect confirms that the CloudFront distribution origin has the Access-Control-Allow-Origin header set to www.example.com.</a>

What should the solutions architect do to resolve the error?

A.
Change the CORS configuration on the S3 bucket. Add rules for CORS to the Allowed Origin element for www.example.com.
Answers
A.
Change the CORS configuration on the S3 bucket. Add rules for CORS to the Allowed Origin element for www.example.com.
B.
Enable the CORS setting in AWS WAF. Create a web ACL rule in which the Access-Control-Allow-Origin header is set to www.example.com.
Answers
B.
Enable the CORS setting in AWS WAF. Create a web ACL rule in which the Access-Control-Allow-Origin header is set to www.example.com.
C.
Enable the CORS setting on the API Gateway API endpoint. Ensure that the API endpoint is configured to return all responses that have the Access-Control -Allow-Origin header set to www.example.com.
Answers
C.
Enable the CORS setting on the API Gateway API endpoint. Ensure that the API endpoint is configured to return all responses that have the Access-Control -Allow-Origin header set to www.example.com.
D.
Enable the CORS setting on the Lambda function. Ensure that the return code of the function has the Access-Control-Allow-Origin header set to www.example.com.
Answers
D.
Enable the CORS setting on the Lambda function. Ensure that the return code of the function has the Access-Control-Allow-Origin header set to www.example.com.
Suggested answer: C

Explanation:

CORS errors occur when a web page hosted on one domain tries to make a request to a server hosted on another domain. In this scenario, the registration form hosted on the static website is trying to make a request to the API Gateway API endpoint hosted on a different domain, which is causing the error. To resolve this error, the Access-Control-Allow-Origin header needs to be set to the domain from which the request is being made. In this case, the header is already set to www.example.com on the CloudFront distribution origin. Therefore, the solutions architect should enable the CORS setting on the API Gateway API endpoint and ensure that the API endpoint is configured to return all responses that have the Access-Control-Allow-Origin header set to www.example.com. This will allow the API endpoint to respond to requests from the static website without a CORS error.

https://aws.amazon.com/premiumsupport/knowledge-center/api-gateway-cors-errors/

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asked 16/09/2024
Laura Reyero
38 questions
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