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Add a CustomString type to allow unescaped output. #101

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Add a CustomString type to allow unescaped output. #101

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21 changes: 21 additions & 0 deletions format.go
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Original file line number Diff line number Diff line change
Expand Up @@ -16,8 +16,27 @@ const (
termTimeFormat = "01-02|15:04:05"
floatFormat = 'f'
termMsgJust = 40
customPrefix = "> "
)

// CustomString is rendered without escaping of newlines/tabs/etc.
type CustomString string

func (c CustomString) Render() string {
var buf bytes.Buffer
lines := strings.Split(string(c), "\n")
buf.WriteByte('\n')
for i, line := range lines {
if i == len(lines)-1 && line == "" {
break
}
buf.WriteString(customPrefix)
buf.WriteString(line)
buf.WriteByte('\n')
}
return buf.String()
}

// Format is the interface implemented by StreamHandler formatters.
type Format interface {
Format(r *Record) []byte
Expand Down Expand Up @@ -228,6 +247,8 @@ func formatLogfmtValue(value interface{}) string {
return strconv.FormatFloat(v, floatFormat, 3, 64)
case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
return fmt.Sprintf("%d", value)
case CustomString:
return v.Render()
case string:
return escapeString(v)
default:
Expand Down