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text_formatter.go
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text_formatter.go
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package logrus
import (
"fmt"
"sort"
"strings"
)
const (
nocolor = 0
red = 31
green = 32
yellow = 33
blue = 34
)
type TextFormatter struct {
// Set to true to bypass checking for a TTY before outputting colors.
ForceColors bool
}
func (f *TextFormatter) Format(entry *Entry) ([]byte, error) {
var serialized []byte
if f.ForceColors || IsTerminal() {
levelText := strings.ToUpper(entry.Data["level"].(string))[0:4]
levelColor := blue
if entry.Data["level"] == "warning" {
levelColor = yellow
} else if entry.Data["level"] == "error" ||
entry.Data["level"] == "fatal" ||
entry.Data["level"] == "panic" {
levelColor = red
}
serialized = append(serialized, []byte(fmt.Sprintf("\x1b[%dm%s\x1b[0m[%04d] %-45s ", levelColor, levelText, miniTS(), entry.Data["msg"]))...)
keys := make([]string, 0)
for k, _ := range entry.Data {
if k != "level" && k != "time" && k != "msg" {
keys = append(keys, k)
}
}
sort.Strings(keys)
first := true
for _, k := range keys {
v := entry.Data[k]
if first {
first = false
} else {
serialized = append(serialized, ' ')
}
serialized = append(serialized, []byte(fmt.Sprintf("\x1b[%dm%s\x1b[0m=%v", levelColor, k, v))...)
}
} else {
serialized = f.AppendKeyValue(serialized, "time", entry.Data["time"].(string))
serialized = f.AppendKeyValue(serialized, "level", entry.Data["level"].(string))
serialized = f.AppendKeyValue(serialized, "msg", entry.Data["msg"].(string))
for key, value := range entry.Data {
if key != "time" && key != "level" && key != "msg" {
serialized = f.AppendKeyValue(serialized, key, value)
}
}
}
return append(serialized, '\n'), nil
}
func (f *TextFormatter) AppendKeyValue(serialized []byte, key, value interface{}) []byte {
if _, ok := value.(string); ok {
return append(serialized, []byte(fmt.Sprintf("%v=%q ", key, value))...)
} else {
return append(serialized, []byte(fmt.Sprintf("%v=%v ", key, value))...)
}
}