How abort request with JSON from ContainerRequestFilter?

Question

I want to abort the request on an error and return JSON. But the below code simply returns a string saying "Unexpected 'U'" (That's not my message)

How do i get it to abort with a JSON response?

requestContext.abortWith(
    Response.status( Response.Status.UNAUTHORIZED ).entity(
        e.getMessage()
    ).type(
        MediaType.APPLICATION_JSON
    ).build()
);

Answer 1

Looks like e.getMessage() won't give you a valid JSON.

---

Once a valid JSON can be a quoted String, you could simply add quotes to the exception message:

String message = "\"" + e.getMessage() + "\"";

requestContext.abortWith(Response.status(Response.Status.UNAUTHORIZED).entity(message)
                                 .type(MediaType.APPLICATION_JSON).build());

---

Alternatively you could wrap the message into a bean:

public class ApiError {

    private String message;

    // Getters and setters
}

And then return it as the response entity:

ApiError error = new ApiError();
error.setMessage(e.getMessage());

requestContext.abortWith(Response.status(Response.Status.UNAUTHORIZED).entity(error)
                                 .type(MediaType.APPLICATION_JSON).build());