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demo-1

Sample Project to show that Spring Framework FieldError logs sensitive data.

Usage

  1. Start the project as spring boot application

  2. Run the following command to send some data that fails validation

    curl --request POST \
  --url http://localhost:8080/payment-cards \
  --header 'Content-Type: application/json' \
  --data '{
	"id": "4",
	"accountNumber": "4444333322221112",
	"expirationDate": "2022-12",
	"accountHolder": "Jimmy Doe",
}'

  3. Check log file of spring boot application. It will contain the following log event as rejectedValue []:

    2022-08-11 19:35:56.283  WARN 1 --- [nio-8080-exec-2] .w.s.m.s.DefaultHandlerExceptionResolver : Resolved [org.springframework.web.bind.MethodArgumentNotValidException: Validation failed for argument [0] in public com.example.demo.domain.PaymentCard com.example.demo.api.CardController.saveCard(com.example.demo.domain.PaymentCard): [Field error in object 'paymentCard' on field 'accountNumber': rejected value [4444333322221112]; codes [CreditCardNumber.paymentCard.accountNumber,CreditCardNumber.accountNumber,CreditCardNumber.java.lang.String,CreditCardNumber]; arguments [org.springframework.context.support.DefaultMessageSourceResolvable: codes [paymentCard.accountNumber,accountNumber]; arguments []; default message [accountNumber],false]; default message [invalid credit card number]] ]