/
error_handler.go
97 lines (84 loc) · 2.16 KB
/
error_handler.go
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package dto
import (
"fmt"
"github.com/labstack/echo/v4"
"net/http"
)
type HTTPError struct {
Code int `json:"code"`
Message string `json:"message"`
Internal error `json:"-"` // Stores the error returned by an external dependency
}
// Error makes it compatible with `error` interface
func (he *HTTPError) Error() string {
if he.Internal == nil {
return fmt.Sprintf("%s", he.Message)
}
return fmt.Sprintf("%s: %s", he.Message, he.Internal)
}
// SetInternal sets error to HTTPError.Internal
// The error will not be returned in the response but will be logged.
// If Debug == true the error will be returned in the response
func (he *HTTPError) SetInternal(err error) *HTTPError {
he.Internal = err
return he
}
// Unwrap satisfies the Go 1.13 error wrapper interface.
func (he *HTTPError) Unwrap() error {
return he.Internal
}
// NewHTTPError creates a new HTTPError instance.
func NewHTTPError(code int, message ...string) *HTTPError {
he := &HTTPError{
Code: code,
Message: http.StatusText(code),
}
if len(message) > 0 {
he.Message = message[0]
}
return he
}
func ToHttpError(err error) *HTTPError {
switch e := err.(type) {
case *HTTPError:
return e
case *echo.HTTPError:
return &HTTPError{
Code: e.Code,
Message: fmt.Sprintf("%v", e.Message),
Internal: e.Internal,
}
default:
return &HTTPError{
Code: http.StatusInternalServerError,
Message: http.StatusText(http.StatusInternalServerError),
Internal: err,
}
}
}
type HTTPErrorHandlerConfig struct {
Debug bool
Logger echo.Logger
}
func NewHTTPErrorHandler(config HTTPErrorHandlerConfig) func(err error, c echo.Context) {
return func(err error, c echo.Context) {
if c.Response().Committed {
return
}
herr := ToHttpError(err)
code := herr.Code
message := echo.Map{"code": code, "message": herr.Message}
if config.Debug {
message = echo.Map{"code": code, "message": herr.Message, "error": err.Error()}
}
// Send response
if c.Request().Method == http.MethodHead { // Issue https://github.com/labstack/echo/issues/608
err = c.NoContent(code)
} else {
err = c.JSON(code, message)
}
if err != nil {
config.Logger.Error(err)
}
}
}