forked from redis/go-redis
-
Notifications
You must be signed in to change notification settings - Fork 1
/
conn.go
118 lines (98 loc) · 2.06 KB
/
conn.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
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
package redis
import (
"bufio"
"net"
"time"
)
const defaultBufSize = 4096
var (
zeroTime = time.Time{}
)
type conn struct {
netcn net.Conn
rd *bufio.Reader
buf []byte
usedAt time.Time
ReadTimeout time.Duration
WriteTimeout time.Duration
}
func newConnDialer(opt *Options) func() (*conn, error) {
dialer := opt.getDialer()
return func() (*conn, error) {
netcn, err := dialer()
if err != nil {
return nil, err
}
cn := &conn{
netcn: netcn,
buf: make([]byte, defaultBufSize),
}
cn.rd = bufio.NewReader(cn)
return cn, cn.init(opt)
}
}
func (cn *conn) init(opt *Options) error {
if opt.Password == "" && opt.DB == 0 {
return nil
}
// Use connection to connect to Redis.
pool := newSingleConnPoolConn(cn)
// Client is not closed because we want to reuse underlying connection.
client := newClient(opt, pool)
if opt.Password != "" {
if err := client.Auth(opt.Password).Err(); err != nil {
return err
}
}
if opt.DB > 0 {
if err := client.Select(opt.DB).Err(); err != nil {
return err
}
}
return nil
}
func (cn *conn) writeCmds(cmds ...Cmder) error {
buf := cn.buf[:0]
for _, cmd := range cmds {
var err error
buf, err = appendArgs(buf, cmd.args())
if err != nil {
return err
}
}
_, err := cn.Write(buf)
return err
}
func (cn *conn) Read(b []byte) (int, error) {
if cn.ReadTimeout != 0 {
cn.netcn.SetReadDeadline(time.Now().Add(cn.ReadTimeout))
} else {
cn.netcn.SetReadDeadline(zeroTime)
}
return cn.netcn.Read(b)
}
func (cn *conn) Write(b []byte) (int, error) {
if cn.WriteTimeout != 0 {
cn.netcn.SetWriteDeadline(time.Now().Add(cn.WriteTimeout))
} else {
cn.netcn.SetWriteDeadline(zeroTime)
}
return cn.netcn.Write(b)
}
func (cn *conn) RemoteAddr() net.Addr {
return cn.netcn.RemoteAddr()
}
func (cn *conn) Close() error {
return cn.netcn.Close()
}
func isSameSlice(s1, s2 []byte) bool {
return len(s1) > 0 && len(s2) > 0 && &s1[0] == &s2[0]
}
func (cn *conn) copyBuf(b []byte) []byte {
if isSameSlice(b, cn.buf) {
new := make([]byte, len(b))
copy(new, b)
return new
}
return b
}