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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
|
// mauLogger - A logger for Go programs
// Copyright (c) 2016-2021 Tulir Asokan
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
package maulogger
import (
"encoding/json"
"fmt"
"io"
"os"
"strings"
"sync"
"time"
)
// LoggerFileFormat ...
type LoggerFileFormat func(now string, i int) string
type BasicLogger struct {
PrintLevel int
FlushLineThreshold int
FileTimeFormat string
FileFormat LoggerFileFormat
TimeFormat string
FileMode os.FileMode
DefaultSub Logger
JSONFile bool
JSONStdout bool
stdoutEncoder *json.Encoder
fileEncoder *json.Encoder
writer *os.File
writerLock sync.Mutex
StdoutLock sync.Mutex
StderrLock sync.Mutex
lines int
metadata map[string]interface{}
}
// Logger contains advanced logging functions
type Logger interface {
Sub(module string) Logger
Subm(module string, metadata map[string]interface{}) Logger
WithDefaultLevel(level Level) Logger
GetParent() Logger
Writer(level Level) io.WriteCloser
Log(level Level, parts ...interface{})
Logln(level Level, parts ...interface{})
Logf(level Level, message string, args ...interface{})
Logfln(level Level, message string, args ...interface{})
Debug(parts ...interface{})
Debugln(parts ...interface{})
Debugf(message string, args ...interface{})
Debugfln(message string, args ...interface{})
Info(parts ...interface{})
Infoln(parts ...interface{})
Infof(message string, args ...interface{})
Infofln(message string, args ...interface{})
Warn(parts ...interface{})
Warnln(parts ...interface{})
Warnf(message string, args ...interface{})
Warnfln(message string, args ...interface{})
Error(parts ...interface{})
Errorln(parts ...interface{})
Errorf(message string, args ...interface{})
Errorfln(message string, args ...interface{})
Fatal(parts ...interface{})
Fatalln(parts ...interface{})
Fatalf(message string, args ...interface{})
Fatalfln(message string, args ...interface{})
}
// Create a Logger
func Createm(metadata map[string]interface{}) Logger {
var log = &BasicLogger{
PrintLevel: 10,
FileTimeFormat: "2006-01-02",
FileFormat: func(now string, i int) string { return fmt.Sprintf("%[1]s-%02[2]d.log", now, i) },
TimeFormat: "15:04:05 02.01.2006",
FileMode: 0600,
FlushLineThreshold: 5,
lines: 0,
metadata: metadata,
}
log.DefaultSub = log.Sub("")
return log
}
func Create() Logger {
return Createm(map[string]interface{}{})
}
func (log *BasicLogger) EnableJSONStdout() {
log.JSONStdout = true
log.stdoutEncoder = json.NewEncoder(os.Stdout)
}
func (log *BasicLogger) GetParent() Logger {
return nil
}
// SetWriter formats the given parts with fmt.Sprint and logs the result with the SetWriter level
func (log *BasicLogger) SetWriter(w *os.File) {
log.writer = w
if log.JSONFile {
log.fileEncoder = json.NewEncoder(w)
}
}
// OpenFile formats the given parts with fmt.Sprint and logs the result with the OpenFile level
func (log *BasicLogger) OpenFile() error {
now := time.Now().Format(log.FileTimeFormat)
i := 1
for ; ; i++ {
if _, err := os.Stat(log.FileFormat(now, i)); os.IsNotExist(err) {
break
}
}
writer, err := os.OpenFile(log.FileFormat(now, i), os.O_WRONLY|os.O_CREATE|os.O_APPEND, log.FileMode)
if err != nil {
return err
} else if writer == nil {
return os.ErrInvalid
}
log.SetWriter(writer)
return nil
}
// Close formats the given parts with fmt.Sprint and logs the result with the Close level
func (log *BasicLogger) Close() error {
if log.writer != nil {
return log.writer.Close()
}
return nil
}
type logLine struct {
log *BasicLogger
Command string `json:"command"`
Time time.Time `json:"time"`
Level string `json:"level"`
Module string `json:"module"`
Message string `json:"message"`
Metadata map[string]interface{} `json:"metadata"`
}
func (ll logLine) String() string {
if len(ll.Module) == 0 {
return fmt.Sprintf("[%s] [%s] %s", ll.Time.Format(ll.log.TimeFormat), ll.Level, ll.Message)
} else {
return fmt.Sprintf("[%s] [%s/%s] %s", ll.Time.Format(ll.log.TimeFormat), ll.Module, ll.Level, ll.Message)
}
}
func reduceItem(m1, m2 map[string]interface{}) map[string]interface{} {
m3 := map[string]interface{}{}
_merge := func(m map[string]interface{}) {
for ia, va := range m {
m3[ia] = va
}
}
_merge(m1)
_merge(m2)
return m3
}
// Raw formats the given parts with fmt.Sprint and logs the result with the Raw level
func (log *BasicLogger) Raw(level Level, extraMetadata map[string]interface{}, module, origMessage string) {
message := logLine{log, "log", time.Now(), level.Name, module, strings.TrimSpace(origMessage), reduceItem(log.metadata, extraMetadata)}
if log.writer != nil {
log.writerLock.Lock()
var err error
if log.JSONFile {
err = log.fileEncoder.Encode(&message)
} else {
_, err = log.writer.WriteString(message.String())
_, _ = log.writer.WriteString("\n")
}
log.writerLock.Unlock()
if err != nil {
log.StderrLock.Lock()
_, _ = os.Stderr.WriteString("Failed to write to log file:")
_, _ = os.Stderr.WriteString(err.Error())
log.StderrLock.Unlock()
}
}
if level.Severity >= log.PrintLevel {
if log.JSONStdout {
log.StdoutLock.Lock()
_ = log.stdoutEncoder.Encode(&message)
log.StdoutLock.Unlock()
} else if level.Severity >= LevelError.Severity {
log.StderrLock.Lock()
_, _ = os.Stderr.WriteString(level.GetColor())
_, _ = os.Stderr.WriteString(message.String())
_, _ = os.Stderr.WriteString(level.GetReset())
_, _ = os.Stderr.WriteString("\n")
log.StderrLock.Unlock()
} else {
log.StdoutLock.Lock()
_, _ = os.Stdout.WriteString(level.GetColor())
_, _ = os.Stdout.WriteString(message.String())
_, _ = os.Stdout.WriteString(level.GetReset())
_, _ = os.Stdout.WriteString("\n")
log.StdoutLock.Unlock()
}
}
}
|
