Problems with Response Header

[kingferiol]

Hi,

We are experimenting issue with response headers (goal is work with CORS)

This code in our lambda function but we are not able to see headers in the answer

awsProxyResponse.getHeaders().put(
	"Access-Control-Allow-Origin", "*"
);
awsProxyResponse.getHeaders().put(
	"Access-Control-Allow-Credentials", "true"
);
awsProxyResponse.getHeaders().put(
	"Access-Control-Allow-Headers",
	"Access-Control-Allow-Origin, Content-Type"
);
awsProxyResponse.getHeaders().put(
	"Access-Control-Allow-Methods", "GET,POST,PUT,DELETE,OPTIONS,HEAD"
);

We tried also adding this in yaml file

    Events:
       MyApp:
         Type: AWS::Serverless::Api
         Properties:
           Path: /myapp/{proxy+}
           Method: any
           Cors:
             AllowMethods: "'GET,POST,PUT,DELETE,OPTIONS,HEAD'"
             AllowHeaders: "'Access-Control-Allow-Headers, Access-Control-Allow-Origin, Content-Type'"
             AllowOrigin: "'*'"
             AllowCredentials: True

Thanks a lot for any help