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package toolbox
import (
"fmt"
"io"
"strings"
)
//NilPointerError represents nil pointer error
type NilPointerError struct {
message string
}
//Error returns en error
func (e *NilPointerError) Error() string {
if e.message == "" {
return "NilPointerError"
}
return e.message
}
//NewNilPointerError creates a new nil pointer error
func NewNilPointerError(message string) error {
return &NilPointerError{
message: message,
}
}
//IsNilPointerError returns true if error is nil pointer
func IsNilPointerError(err error) bool {
if err == nil {
return false
}
_, ok := err.(*NilPointerError)
return ok
}
//IsEOFError returns true if io.EOF
func IsEOFError(err error) bool {
if err == nil {
return false
}
return err == io.EOF
}
//NotFoundError represents not found error
type NotFoundError struct {
URL string
}
func (e *NotFoundError) Error() string {
return fmt.Sprintf("not found: %v", e.URL)
}
//IsNotFoundError checks is supplied error is NotFoundError type
func IsNotFoundError(err error) bool {
if err == nil {
return false
}
_, ok := err.(*NotFoundError)
return ok
}
//ReclassifyNotFoundIfMatched reclassify error if not found
func ReclassifyNotFoundIfMatched(err error, URL string) error {
if err == nil {
return nil
}
message := strings.ToLower(err.Error())
if strings.Contains(message, "doesn't exist") ||
strings.Contains(message, "no such file or directory") ||
strings.Contains(err.Error(), "404") ||
strings.Contains(err.Error(), "nosuchbucket") {
return &NotFoundError{URL: URL}
}
return err
}
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