forked from emersion/go-imap
-
Notifications
You must be signed in to change notification settings - Fork 0
/
cmd_any.go
87 lines (73 loc) · 2.09 KB
/
cmd_any.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
76
77
78
79
80
81
82
83
84
85
86
87
package client
import (
"errors"
"github.com/emersion/go-imap"
"github.com/emersion/go-imap/commands"
)
// ErrAlreadyLoggedOut is returned if Logout is called when the client is
// already logged out.
var ErrAlreadyLoggedOut = errors.New("Already logged out")
// Capability requests a listing of capabilities that the server supports.
// Capabilities are often returned by the server with the greeting or with the
// STARTTLS and LOGIN responses, so usually explicitly requesting capabilities
// isn't needed.
//
// Most of the time, Support should be used instead.
func (c *Client) Capability() (map[string]bool, error) {
cmd := &commands.Capability{}
if status, err := c.execute(cmd, nil); err != nil {
return nil, err
} else if err := status.Err(); err != nil {
return nil, err
}
c.locker.Lock()
caps := c.caps
c.locker.Unlock()
return caps, nil
}
// Support checks if cap is a capability supported by the server. If the server
// hasn't sent its capabilities yet, Support requests them.
func (c *Client) Support(cap string) (bool, error) {
c.locker.Lock()
ok := c.caps != nil
c.locker.Unlock()
// If capabilities are not cached, request them
if !ok {
if _, err := c.Capability(); err != nil {
return false, err
}
}
c.locker.Lock()
supported := c.caps[cap]
c.locker.Unlock()
return supported, nil
}
// Noop always succeeds and does nothing.
//
// It can be used as a periodic poll for new messages or message status updates
// during a period of inactivity. It can also be used to reset any inactivity
// autologout timer on the server.
func (c *Client) Noop() error {
cmd := new(commands.Noop)
status, err := c.execute(cmd, nil)
if err != nil {
return err
}
return status.Err()
}
// Logout gracefully closes the connection.
func (c *Client) Logout() error {
if c.State() == imap.LogoutState {
return ErrAlreadyLoggedOut
}
cmd := new(commands.Logout)
if status, err := c.execute(cmd, nil); err == errClosed {
// Server closed connection, that's what we want anyway
return nil
} else if err != nil {
return err
} else if status != nil {
return status.Err()
}
return nil
}