Function ErrorWithHeaders

error.go:181–195

ErrorWithHeaders wraps an error with additional headers to be sent to the client. This is useful for e.g. caching, rate limiting, or other metadata.

(err error, headers http.Header)

// ErrorWithHeaders wraps an error with additional headers to be sent to the
// client. This is useful for e.g. caching, rate limiting, or other metadata.
func ErrorWithHeaders(err error, headers http.Header) error {
	var he HeadersError
	if errors.As(err, &he) {
		// There is already a headers error, so we need to merge the headers. This
		// lets you chain multiple calls together and have all the headers set.
		orig := he.GetHeaders()
		for k, values := range headers {
			for _, v := range values {
				orig.Add(k, v)
			}
		}
		return err
	}
	return &errWithHeaders{err: err, headers: headers}
}

// NewError creates a new instance of an error model with the given status code,
// message, and optional error details. If the error details implement the