CODEWITHSUNDEEP
javaspringapihttp-headers
binaryhex
binaryhex

Reputation: 133

Validate accept Headers in spring

How can I validate the accept headers in spring and return a custom message if the accept header is not application/json. Currently I am doing it this way(below) but I am wondering if there is another way of doing this?

I know I can make custom exceptions and throw the exception based on what went wrong but is there a different way of doing this?

@GetMapping(value = "/get", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})
public ResponseEntity<String> get(final HttpEntity<String> httpEntity) {
    HttpHeaders responseHeaders = new HttpHeaders();
    String acceptString = httpEntity.getHeaders().getFirst("Accept");

    if (acceptString == null || acceptString.isEmpty()) {
        return new ResponseEntity<String>("empty accept header", HttpStatus.BAD_REQUEST);
    }

    if ((MediaType.APPLICATION_JSON_VALUE).equalsIgnoreCase(acceptString)) {
        responseHeaders.setContentType(MediaType.APPLICATION_JSON_UTF8);
    }
    else {
        return new ResponseEntity<String>("Not valid accept value", HttpStatus.BAD_REQUEST);
    }

....

Upvotes: 2

Views: 1920

Answers (1)

Bart
Bart

Reputation: 265

Within your @Getmapping you can add headers="Accept=application/json" this way your method will only handle calls with that header type.

You can then add a method which processes all the calls that are ignored by your specific AcceptHeader method. This way you only need one method to validate the headers.

You can also write a custom validator and use anotation to add this to your method like here: conditional validation

Upvotes: 1

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