u := Err{
			msg:    msg,
			action: action,
			hint:   hint,
		}
		if err != nil {
			u.detail = err.Error()
		}
		return u
	}
}

// ErrorToErr inspects the passed error and transforms it
// to the appropriate UI error.
func ErrorToErr(err error) Err {
	if err == nil {
		return Err{}
	}

	// If this is already a Err, do nothing
	if e, ok := err.(Err); ok {
		return e
	}

// along with this program.  If not, see <http://www.gnu.org/licenses/>.

package kms

// Error encapsulates S3 API error response fields.
type Error struct {
	Err            error
	APICode        string
	HTTPStatusCode int
}

func (e Error) Error() string {
	return e.Err.Error()

	cause      error
}

func (err *s3Error) Cause() error {
	return err.cause
}

func (err *s3Error) ErrorCode() string {
	return err.code
}

func (err *s3Error) ErrorMessage() string {
	return err.message
}

func (err *s3Error) HTTPStatusCode() int {
	return err.statusCode
}

func (err *s3Error) Error() string {
	return err.message
}

func errMalformedXML(err error) *s3Error {

}

// ErrInvalidFilterName - invalid filter name error.
type ErrInvalidFilterName struct {
	FilterName string
}

func (err ErrInvalidFilterName) Error() string {
	return fmt.Sprintf("invalid filter name '%v'", err.FilterName)
}

// ErrFilterNamePrefix - more than one prefix usage error.
type ErrFilterNamePrefix struct{}

func (err ErrFilterNamePrefix) Error() string {
	return "more than one prefix in filter rule"
}

	return err.message
}

func (err *s3Error) HTTPStatusCode() int {
	return err.statusCode
}

func (err *s3Error) Error() string {
	return err.message
}

func errCSVParsingError(err error) *s3Error {
	return &s3Error{
		code:       "CSVParsingError",
		message:    "Encountered an error parsing the CSV file. Check the file and try again.",
		statusCode: 400,
		cause:      err,
	}
}

Os status codes na faixa dos 400 significam que houve um erro por parte do cliente.

Você se lembra de todos aqueles erros (e piadas) a respeito do "**404 Not Found**"?

## Use o `HTTPException`

Para retornar ao cliente *responses* HTTP com erros, use o `HTTPException`.

### Import `HTTPException`

```Python hl_lines="1"
{!../../../docs_src/handling_errors/tutorial001.py!}
```

		statusCode: 400,
		cause:      err,
	}
}

func errColumnTooLong(err error) *s3Error {
	return &s3Error{
		code:       "ColumnTooLong",
		message:    "The length of a column in the result is greater than maxCharsPerColumn of 1 MB.",
		statusCode: 400,
		cause:      err,
	}
}

func errOverMaxColumn(err error) *s3Error {
	return &s3Error{
		code:       "OverMaxColumn",

	return &s3Error{
		code:       "InvalidQuery",
		message:    err.Error(),
		statusCode: 400,
		cause:      err,
	}
}

func errBadTableName(err error) *s3Error {
	return &s3Error{
		code:       "BadTableName",
		message:    fmt.Sprintf("The table name is not supported: %v", err),
		statusCode: 400,
		cause:      err,
	}
}

func errDataSource(err error) *s3Error {
	return &s3Error{

// error returned when temporary account is not found
var errNoSuchTempAccount = errors.New("Specified temporary account does not exist")

// error returned in IAM subsystem when an account doesn't exist.
var errNoSuchAccount = errors.New("Specified account does not exist")

// error returned in IAM subsystem when groups doesn't exist.

type SizeTooLarge struct {
	Want int64
	Got  int64
}

func (e SizeTooLarge) Error() string {
	return fmt.Sprintf("Size large: got %d, want %d", e.Got, e.Want)
}

// SizeMismatch error size mismatch
type SizeMismatch struct {
	Want int64
	Got  int64
}

func (e SizeMismatch) Error() string {
	return fmt.Sprintf("Size mismatch: got %d, want %d", e.Got, e.Want)
}