HandleErrors returns a function that can be used to convert an ErrorHandler into an http.Handler.

HandleJSON returns a function that can be used to convert an JSONHandler into an http.Handler.

WriteError returns a function that can be used to write an error to a ResponseWriter and set the HTTP status code.

WriteJSON writes the given value to the ResponseWriter and sets the HTTP status to the given code.

ErrorHandler is like http.Handler except it returns an error which may be returned as the error body of the response.

ErrorToResponse represents a function that can convert a Go error into a form that can be returned as a JSON body from an HTTP request.

JSONHandler is like http.Handler except that it returns a body (to be converted to JSON) and an error.