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I’m writing a REST based web service, and I’m trying to figure out the best way to handle error conditions.
Currently the service is returning HTTP Errors, such as Bad Request, but how can I return extra information to give developers using the web service an idea what they’re doing wrong?
For example: creating a user with a null username returns an error of Bad Request. How can I add that the error was caused by a null username parameter?
It’s stated in the HTTP spec that most error codes should return some basic text that gives a clarification of why the error is being returned. The basic Java Servlet Spec defines the
HttpServletResponse.sendError(int Code, String message)for this purpose.