forked from emersion/go-smtp
-
Notifications
You must be signed in to change notification settings - Fork 0
/
transform.go
executable file
·75 lines (62 loc) · 1.49 KB
/
transform.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
package backendutil
import (
"io"
"github.com/xml520/go-smtp"
)
// TransformBackend is a backend that transforms messages.
type TransformBackend struct {
Backend smtp.Backend
TransformMail func(from string) (string, error)
TransformRcpt func(to string) (string, error)
TransformData func(r io.Reader) (io.Reader, error)
}
func (be *TransformBackend) NewSession(c *smtp.Conn) (smtp.Session, error) {
sess, err := be.Backend.NewSession(c)
if err != nil {
return nil, err
}
return &transformSession{Session: sess, be: be}, nil
}
type transformSession struct {
Session smtp.Session
be *TransformBackend
}
func (s *transformSession) Reset() {
s.Session.Reset()
}
func (s *transformSession) AuthPlain(username, password string) error {
return s.Session.AuthPlain(username, password)
}
func (s *transformSession) Mail(from string, opts *smtp.MailOptions) error {
if s.be.TransformMail != nil {
var err error
from, err = s.be.TransformMail(from)
if err != nil {
return err
}
}
return s.Session.Mail(from, opts)
}
func (s *transformSession) Rcpt(to string) error {
if s.be.TransformRcpt != nil {
var err error
to, err = s.be.TransformRcpt(to)
if err != nil {
return err
}
}
return s.Session.Rcpt(to)
}
func (s *transformSession) Data(r io.Reader) error {
if s.be.TransformData != nil {
var err error
r, err = s.be.TransformData(r)
if err != nil {
return err
}
}
return s.Session.Data(r)
}
func (s *transformSession) Logout() error {
return s.Session.Logout()
}