forked from x-cray/logrus-prefixed-formatter
/
formatter.go
199 lines (170 loc) · 4.46 KB
/
formatter.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
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
package prefixed
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/mgutz/ansi"
"github.com/thinkong/color"
)
const reset = ansi.Reset
var (
baseTimestamp time.Time
isTerminal bool
)
func init() {
baseTimestamp = time.Now()
isTerminal = logrus.IsTerminal()
}
func miniTS() int {
return int(time.Since(baseTimestamp) / time.Second)
}
type TextFormatter struct {
// Set to true to bypass checking for a TTY before outputting colors.
ForceColors bool
// Force disabling colors.
DisableColors bool
// Disable timestamp logging. useful when output is redirected to logging
// system that already adds timestamps.
DisableTimestamp bool
// Enable logging of just the time passed since beginning of execution.
ShortTimestamp bool
// Timestamp format to use for display when a full timestamp is printed.
TimestampFormat string
// The fields are sorted by default for a consistent output. For applications
// that log extremely frequently and don't use the JSON formatter this may not
// be desired.
DisableSorting bool
}
func (f *TextFormatter) Format(entry *logrus.Entry) ([]byte, error) {
var keys []string = make([]string, 0, len(entry.Data))
for k := range entry.Data {
if k != "prefix" {
keys = append(keys, k)
}
}
if !f.DisableSorting {
sort.Strings(keys)
}
b := &bytes.Buffer{}
prefixFieldClashes(entry.Data)
isColorTerminal := isTerminal && (runtime.GOOS != "windows")
isColored := (f.ForceColors || isColorTerminal) && !f.DisableColors
timestampFormat := f.TimestampFormat
if timestampFormat == "" {
timestampFormat = time.Stamp
}
if isColored {
f.printColored(b, entry, keys, timestampFormat)
} else {
if !f.DisableTimestamp {
f.appendKeyValue(b, "time", entry.Time.Format(timestampFormat))
}
f.appendKeyValue(b, "level", entry.Level.String())
if entry.Message != "" {
f.appendKeyValue(b, "msg", entry.Message)
}
for _, key := range keys {
f.appendKeyValue(b, key, entry.Data[key])
}
}
b.WriteByte('\n')
return b.Bytes(), nil
}
func (f *TextFormatter) printColored(b *bytes.Buffer, entry *logrus.Entry, keys []string, timestampFormat string) {
levelColor := color.White
var levelText string
var debugInf string
switch entry.Level {
case logrus.InfoLevel:
//levelColor = ansi.Green
levelColor = color.Green
case logrus.WarnLevel:
//levelColor = ansi.Yellow
levelColor = color.Yellow
case logrus.ErrorLevel, logrus.FatalLevel, logrus.PanicLevel:
//levelColor = ansi.Red
levelColor = color.Red
case logrus.DebugLevel:
pc, file, line,_ := runtime.Caller(6)
callername := runtime.FuncForPC(pc).Name()
debugInf = fmt.Sprintf("[%s][%s][%d]", callername, file, line)
fallthrough
default:
//levelColor = ansi.Blue
levelColor = color.Blue
}
if entry.Level != logrus.WarnLevel {
levelText = strings.ToUpper(entry.Level.String())
} else {
levelText = "WARN"
}
prefix := ""
prefixValue, ok := entry.Data["prefix"]
if ok {
prefix = fmt.Sprint(" ", ansi.Cyan, prefixValue, ":", reset)
}
if f.ShortTimestamp {
//fmt.Fprintf(b, "%s[%04d]%s %s%+5s%s%s %s", ansi.LightBlack, miniTS(), reset, levelColor, levelText, reset, prefix, entry.Message)
s := fmt.Sprintf("%+5s [%04d] %s %s", levelText, ansi.LightBlack, miniTS(), prefix, entry.Message)
levelColor(s)
} else {
s := fmt.Sprintf("%+5s [%s] %s %s %s", levelText, entry.Time.Format(timestampFormat), debugInf, prefix, entry.Message)
levelColor(s)
}
for _, k := range keys {
v := entry.Data[k]
s := fmt.Sprintf(" %s=%+v", k, v)
levelColor(s)
}
}
func needsQuoting(text string) bool {
for _, ch := range text {
if !((ch >= 'a' && ch <= 'z') ||
(ch >= 'A' && ch <= 'Z') ||
(ch >= '0' && ch <= '9') ||
ch == '-' || ch == '.') {
return false
}
}
return true
}
func (f *TextFormatter) appendKeyValue(b *bytes.Buffer, key string, value interface{}) {
b.WriteString(key)
b.WriteByte('=')
switch value := value.(type) {
case string:
if needsQuoting(value) {
b.WriteString(value)
} else {
fmt.Fprintf(b, "%q", value)
}
case error:
errmsg := value.Error()
if needsQuoting(errmsg) {
b.WriteString(errmsg)
} else {
fmt.Fprintf(b, "%q", value)
}
default:
fmt.Fprint(b, value)
}
b.WriteByte(' ')
}
func prefixFieldClashes(data logrus.Fields) {
_, ok := data["time"]
if ok {
data["fields.time"] = data["time"]
}
_, ok = data["msg"]
if ok {
data["fields.msg"] = data["msg"]
}
_, ok = data["level"]
if ok {
data["fields.level"] = data["level"]
}
}