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/* ipp-usb - HTTP reverse proxy, backed by IPP-over-USB connection to device
*
* Copyright (C) 2020 and up by Alexander Pevzner (pzz@apevzner.com)
* See LICENSE for license terms and conditions
*
* Common errors
*/
package main
import (
"errors"
"io"
"net/url"
)
// Error values for ipp-usb
var (
ErrLockIsBusy = errors.New("Lock is busy")
ErrNoMemory = errors.New("Not enough memory")
ErrShutdown = errors.New("Shutdown requested")
ErrBlackListed = errors.New("Device is blacklisted")
ErrInitTimedOut = errors.New("Device initialization timed out")
ErrUnusable = errors.New("Device doesn't implement print or scan service")
ErrNoIppUsb = errors.New("ipp-usb daemon not running")
ErrAccess = errors.New("Access denied")
ErrPartialInit = errors.New("Some parts of device not ready yet")
)
// ErrIsEOF tells if error is io.EOF, possibly wrapped by
// the Go HTTP client.
func ErrIsEOF(err error) bool {
if urlerr, ok := err.(*url.Error); ok {
return urlerr.Err == io.EOF
}
return err == io.EOF
}
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