112 lines
2.2 KiB
Go
112 lines
2.2 KiB
Go
package ln
|
|
|
|
import (
|
|
"bytes"
|
|
"context"
|
|
"fmt"
|
|
"time"
|
|
)
|
|
|
|
var (
|
|
// DefaultTimeFormat represents the way in which time will be formatted by default
|
|
DefaultTimeFormat = time.RFC3339
|
|
)
|
|
|
|
// Formatter defines the formatting of events
|
|
type Formatter interface {
|
|
Format(ctx context.Context, e Event) ([]byte, error)
|
|
}
|
|
|
|
// DefaultFormatter is the default way in which to format events
|
|
var DefaultFormatter Formatter
|
|
|
|
func init() {
|
|
DefaultFormatter = NewTextFormatter()
|
|
}
|
|
|
|
// TextFormatter formats events as key value pairs.
|
|
// Any remaining text not wrapped in an instance of `F` will be
|
|
// placed at the end.
|
|
type TextFormatter struct {
|
|
TimeFormat string
|
|
}
|
|
|
|
// NewTextFormatter returns a Formatter that outputs as text.
|
|
func NewTextFormatter() Formatter {
|
|
return &TextFormatter{TimeFormat: DefaultTimeFormat}
|
|
}
|
|
|
|
// Format implements the Formatter interface
|
|
func (t *TextFormatter) Format(_ context.Context, e Event) ([]byte, error) {
|
|
var writer bytes.Buffer
|
|
|
|
writer.WriteString("time=\"")
|
|
writer.WriteString(e.Time.Format(t.TimeFormat))
|
|
writer.WriteString("\"")
|
|
|
|
keys := make([]string, len(e.Data))
|
|
i := 0
|
|
|
|
for k := range e.Data {
|
|
keys[i] = k
|
|
i++
|
|
}
|
|
|
|
for _, k := range keys {
|
|
v := e.Data[k]
|
|
|
|
writer.WriteByte(' ')
|
|
if shouldQuote(k) {
|
|
writer.WriteString(fmt.Sprintf("%q", k))
|
|
} else {
|
|
writer.WriteString(k)
|
|
}
|
|
|
|
writer.WriteByte('=')
|
|
|
|
switch v.(type) {
|
|
case string:
|
|
vs, _ := v.(string)
|
|
if shouldQuote(vs) {
|
|
fmt.Fprintf(&writer, "%q", vs)
|
|
} else {
|
|
writer.WriteString(vs)
|
|
}
|
|
case error:
|
|
tmperr, _ := v.(error)
|
|
es := tmperr.Error()
|
|
|
|
if shouldQuote(es) {
|
|
fmt.Fprintf(&writer, "%q", es)
|
|
} else {
|
|
writer.WriteString(es)
|
|
}
|
|
case time.Time:
|
|
tmptime, _ := v.(time.Time)
|
|
writer.WriteString(tmptime.Format(time.RFC3339))
|
|
default:
|
|
fmt.Fprint(&writer, v)
|
|
}
|
|
}
|
|
|
|
if len(e.Message) > 0 {
|
|
fmt.Fprintf(&writer, " _msg=%q", e.Message)
|
|
}
|
|
|
|
writer.WriteByte('\n')
|
|
return writer.Bytes(), nil
|
|
}
|
|
|
|
func shouldQuote(s string) bool {
|
|
for _, b := range s {
|
|
if !((b >= 'A' && b <= 'Z') ||
|
|
(b >= 'a' && b <= 'z') ||
|
|
(b >= '0' && b <= '9') ||
|
|
(b == '-' || b == '.' || b == '#' ||
|
|
b == '/' || b == '_')) {
|
|
return true
|
|
}
|
|
}
|
|
return false
|
|
}
|