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#42: Return error in b64linebreaker.go when no out is set

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Winni Neessen 2022-09-08 15:43:14 +02:00
parent 3eb4bc9c52
commit 910248d999
Signed by: wneessen
GPG key ID: 385AC9889632126E
1 changed files with 5 additions and 0 deletions
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5
b64linebreaker.go
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@ -5,9 +5,13 @@
package mail package mail
import ( import (
"fmt"
"io" "io"
) )
// ErrNoOutWriter is an error message that should be used if a Base64LineBreaker has no out io.Writer set
const ErrNoOutWriter = "no io.Writer set for Base64LineBreaker"
// Base64LineBreaker is a io.WriteCloser that writes Base64 encoded data streams // Base64LineBreaker is a io.WriteCloser that writes Base64 encoded data streams
// with line breaks at a given line length // with line breaks at a given line length
type Base64LineBreaker struct { type Base64LineBreaker struct {
@ -22,6 +26,7 @@ var nl = []byte(SingleNewLine)
// line length is reached // line length is reached
func (l *Base64LineBreaker) Write(b []byte) (n int, err error) { func (l *Base64LineBreaker) Write(b []byte) (n int, err error) {
if l.out == nil { if l.out == nil {
err = fmt.Errorf(ErrNoOutWriter)
return return
} }
if l.used+len(b) < MaxBodyLength { if l.used+len(b) < MaxBodyLength {