/
host_stdout_formatter.go
211 lines (179 loc) · 5.03 KB
/
host_stdout_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
200
201
202
203
204
205
206
207
208
209
210
211
package raccoon
import (
"bytes"
"fmt"
"runtime"
"sort"
"strings"
"time"
"github.com/Sirupsen/logrus"
"github.com/fatih/color"
"strconv"
)
const (
nocolor = 0
red = 31
green = 32
yellow = 33
blue = 34
gray = 37
)
var (
baseTimestamp time.Time
isTerminal bool
)
func init() {
baseTimestamp = time.Now()
isTerminal = logrus.IsTerminal()
}
func miniTS() int {
return int(time.Since(baseTimestamp) / time.Second)
}
//HostStdoutFormatter is a custom Logrus text formatter to fit the colored
// output needs of Raccoon.
type hostStdoutFormatter 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 the full timestamp when a TTY is attached instead of just
// the time passed since beginning of execution.
FullTimestamp bool
// TimestampFormat 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
}
// This is to not silently overwrite `time`, `msg` and `level` fields when
// dumping it. If this code wasn't there doing:
//
// logrus.WithField("level", 1).Info("hello")
//
// Would just silently drop the user provided level. Instead with this code
// it'll logged as:
//
// {"level": "info", "fields.level": 1, "msg": "hello", "time": "..."}
//
// It's not exported because it's still using Data in an opinionated way. It's
// to avoid code duplication between the two default formatters.
func prefixFieldClashes(data logrus.Fields) {
if t, ok := data["time"]; ok {
data["fields.time"] = t
}
if m, ok := data["msg"]; ok {
data["fields.msg"] = m
}
if l, ok := data["level"]; ok {
data["fields.level"] = l
}
}
func (f *hostStdoutFormatter) Format(entry *logrus.Entry) ([]byte, error) {
var keys []string = make([]string, 0, len(entry.Data))
for k := range entry.Data {
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 = logrus.DefaultTimestampFormat
}
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 *hostStdoutFormatter) printColored(b *bytes.Buffer, entry *logrus.Entry, keys []string, timestampFormat string) {
var levelColor int
switch entry.Level {
case logrus.DebugLevel:
levelColor = gray
case logrus.WarnLevel:
levelColor = yellow
case logrus.ErrorLevel, logrus.FatalLevel, logrus.PanicLevel:
levelColor = red
default:
levelColor = blue
}
levelText := strings.ToUpper(entry.Level.String())[0:4]
passedColor, _ := entry.Data["color"].(color.Attribute)
myColor := color.New(passedColor).SprintfFunc()
host, _ := entry.Data["host"].(string)
sshPort, _ := entry.Data["ssh_port"].(int)
if !f.FullTimestamp {
fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%04d] %-15s %-44s", levelColor,
levelText, miniTS(), myColor(host+":"+strconv.Itoa(sshPort)), myColor(entry.Message))
} else {
fmt.Fprintf(b, "\x1b[%dm%s\x1b[0m[%s] %-15s %-44s", levelColor,
levelText, entry.Time.Format(timestampFormat), myColor(host),
myColor(entry.Message))
}
for _, k := range keys {
if k != "host" && k != "color" && k != "ssh_port" { //Do not print "color", "host" and "sshPort" fields
if entry.Level != logrus.DebugLevel { //Do not print package if error level isn't debug
if k != "package" {
v := entry.Data[k]
fmt.Fprintf(b, " \x1b[%dm%s\x1b[0m=%+v", levelColor, k, v)
}
} else {
v := entry.Data[k]
fmt.Fprintf(b, " \x1b[%dm%s\x1b[0m=%+v", levelColor, k, v)
}
}
}
}
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 true
}
}
return false
}
func (f *hostStdoutFormatter) 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(' ')
}