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
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
package pgx
import (
"encoding/binary"
)
const (
protocolVersionNumber = 196608 // 3.0
)
const (
backendKeyData = 'K'
authenticationX = 'R'
readyForQuery = 'Z'
rowDescription = 'T'
dataRow = 'D'
commandComplete = 'C'
errorResponse = 'E'
noticeResponse = 'N'
parseComplete = '1'
parameterDescription = 't'
bindComplete = '2'
notificationResponse = 'A'
emptyQueryResponse = 'I'
noData = 'n'
closeComplete = '3'
flush = 'H'
copyInResponse = 'G'
copyData = 'd'
copyFail = 'f'
copyDone = 'c'
)
type startupMessage struct {
options map[string]string
}
func newStartupMessage() *startupMessage {
return &startupMessage{map[string]string{}}
}
func (s *startupMessage) Bytes() (buf []byte) {
buf = make([]byte, 8, 128)
binary.BigEndian.PutUint32(buf[4:8], uint32(protocolVersionNumber))
for key, value := range s.options {
buf = append(buf, key...)
buf = append(buf, 0)
buf = append(buf, value...)
buf = append(buf, 0)
}
buf = append(buf, ("\000")...)
binary.BigEndian.PutUint32(buf[0:4], uint32(len(buf)))
return buf
}
type FieldDescription struct {
Name string
Table Oid
AttributeNumber int16
DataType Oid
DataTypeSize int16
DataTypeName string
Modifier int32
FormatCode int16
}
// PgError represents an error reported by the PostgreSQL server. See
// http://www.postgresql.org/docs/9.3/static/protocol-error-fields.html for
// detailed field description.
type PgError struct {
Severity string
Code string
Message string
Detail string
Hint string
Position int32
InternalPosition int32
InternalQuery string
Where string
SchemaName string
TableName string
ColumnName string
DataTypeName string
ConstraintName string
File string
Line int32
Routine string
}
func (pe PgError) Error() string {
return pe.Severity + ": " + pe.Message + " (SQLSTATE " + pe.Code + ")"
}
func newWriteBuf(c *Conn, t byte) *WriteBuf {
buf := append(c.wbuf[0:0], t, 0, 0, 0, 0)
c.writeBuf = WriteBuf{buf: buf, sizeIdx: 1, conn: c}
return &c.writeBuf
}
// WriteBuf is used build messages to send to the PostgreSQL server. It is used
// by the Encoder interface when implementing custom encoders.
type WriteBuf struct {
buf []byte
sizeIdx int
conn *Conn
}
func (wb *WriteBuf) startMsg(t byte) {
wb.closeMsg()
wb.buf = append(wb.buf, t, 0, 0, 0, 0)
wb.sizeIdx = len(wb.buf) - 4
}
func (wb *WriteBuf) closeMsg() {
binary.BigEndian.PutUint32(wb.buf[wb.sizeIdx:wb.sizeIdx+4], uint32(len(wb.buf)-wb.sizeIdx))
}
func (wb *WriteBuf) WriteByte(b byte) {
wb.buf = append(wb.buf, b)
}
func (wb *WriteBuf) WriteCString(s string) {
wb.buf = append(wb.buf, []byte(s)...)
wb.buf = append(wb.buf, 0)
}
func (wb *WriteBuf) WriteInt16(n int16) {
b := make([]byte, 2)
binary.BigEndian.PutUint16(b, uint16(n))
wb.buf = append(wb.buf, b...)
}
func (wb *WriteBuf) WriteUint16(n uint16) {
b := make([]byte, 2)
binary.BigEndian.PutUint16(b, n)
wb.buf = append(wb.buf, b...)
}
func (wb *WriteBuf) WriteInt32(n int32) {
b := make([]byte, 4)
binary.BigEndian.PutUint32(b, uint32(n))
wb.buf = append(wb.buf, b...)
}
func (wb *WriteBuf) WriteUint32(n uint32) {
b := make([]byte, 4)
binary.BigEndian.PutUint32(b, n)
wb.buf = append(wb.buf, b...)
}
func (wb *WriteBuf) WriteInt64(n int64) {
b := make([]byte, 8)
binary.BigEndian.PutUint64(b, uint64(n))
wb.buf = append(wb.buf, b...)
}
func (wb *WriteBuf) WriteBytes(b []byte) {
wb.buf = append(wb.buf, b...)
}
|
