AsError converts val to an error by either casting val to error if possible, or using its string value or String method as error message, or using fmt.Errorf("%+v", val) to format the value as error.

DefaultHandlerImpl checks if err unwraps to a http.Handler and calls its ServeHTTP method else it checks if err wrapped any key in SentinelHandlers and calls ServeHTTP of the http.Handler value.

DontLog wraps the passed error so that ShouldLog returns false.

Handle will call DefaultHandler.HandleError(err, writer, request).

HandlePanic will call DefaultHandler.HandleError(AsError(recoverResult), writer, request).

JSON returns a Response error that will respond with the passed statusCode, the content type application/json and the passed body marshalled as JSON.

ShouldLog checks if the passed error has been wrapped with DontLog.

WriteAsJSON unmarshals err as JSON and writes it as application/json response body using the passed statusCode.

WriteHandler checks if err unwraps to a http.Handler and calls its ServeHTTP method else it checks if err wrapped any key in SentinelHandlers and calls ServeHTTP of the http.Handler value.

WriteInternalServerError writes err as 500 Internal Server Error reponse.

400: RFC 7231, 6.5.1.

403: RFC 7231, 6.5.3.

405: RFC 7231, 6.5.5.

404: RFC 7231, 6.5.4.

402: RFC 7231, 6.5.2.

SentinelHandlers is used by DefaultHandlerImpl to map wrapped sentinel errors to corresponding http.Handler.

401: RFC 7235, 3.1.

Response extends the error interface with the http.Handler interface to enable errors which can render themselves as HTTP responses.