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
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
|
package imap
import (
"fmt"
"net"
"sync"
"time"
uidplus "github.com/emersion/go-imap-uidplus"
imapClient "github.com/emersion/go-imap/client"
"github.com/Necoro/feed2imap-go/pkg/config"
"github.com/Necoro/feed2imap-go/pkg/log"
)
const numberConns = 5
type connConf struct {
host string
delimiter string
toplevel Folder
}
type Client struct {
connConf
mailboxes *mailboxes
commander *commander
connections [numberConns]*connection
idxCounter int
connChannel chan *connection
connLock sync.Mutex
disconnected bool
}
var dialer imapClient.Dialer
func init() {
dialer = &net.Dialer{Timeout: 30 * time.Second}
}
func newImapClient(url config.Url) (c *imapClient.Client, err error) {
if url.ForceTLS() {
if c, err = imapClient.DialWithDialerTLS(dialer, url.HostPort(), nil); err != nil {
return nil, fmt.Errorf("connecting (TLS) to %s: %w", url.Host, err)
}
log.Print("Connected to ", url.HostPort(), " (TLS)")
} else {
if c, err = imapClient.DialWithDialer(dialer, url.HostPort()); err != nil {
return nil, fmt.Errorf("connecting to %s: %w", url.Host, err)
}
}
return
}
func (cl *Client) connect(url config.Url) (*connection, error) {
c, err := newImapClient(url)
if err != nil {
return nil, err
}
cl.connLock.Lock()
defer cl.connLock.Unlock()
if cl.disconnected {
return nil, nil
}
conn := cl.createConnection(c)
if !url.ForceTLS() {
if err = conn.startTls(); err != nil {
return nil, err
}
}
if err = c.Login(url.User, url.Password); err != nil {
return nil, fmt.Errorf("login to %s: %w", url.Host, err)
}
cl.connChannel <- conn
return conn, nil
}
func (cl *Client) Disconnect() {
if cl != nil {
cl.connLock.Lock()
cl.stopCommander()
close(cl.connChannel)
connected := false
for _, conn := range cl.connections {
connected = conn.disconnect() || connected
}
if connected {
log.Print("Disconnected from ", cl.host)
}
cl.disconnected = true
cl.connLock.Unlock()
}
}
func (cl *Client) createConnection(c *imapClient.Client) *connection {
cl.idxCounter++
if cl.idxCounter >= len(cl.connections) {
panic("Too many connections")
}
client := &client{c, uidplus.NewClient(c)}
conn := &connection{
connConf: &cl.connConf,
mailboxes: cl.mailboxes,
c: client,
}
cl.connections[cl.idxCounter] = conn
return conn
}
func newClient() *Client {
return &Client{
mailboxes: NewMailboxes(),
connChannel: make(chan *connection, 0),
}
}
|
