Switch access logging to logrus

middlewares/accesslog/logger_formatters.go

@@ -0,0 +1,68 @@
+package accesslog
+
+import (
+	"bytes"
+	"fmt"
+	"time"
+
+	"github.com/Sirupsen/logrus"
+)
+
+// default format for time presentation
+const commonLogTimeFormat = "02/Jan/2006:15:04:05 -0700"
+
+// CommonLogFormatter provides formatting in the Traefik common log format
+type CommonLogFormatter struct {
+}
+
+//Format formats the log entry in the Traefik common log format
+func (f *CommonLogFormatter) Format(entry *logrus.Entry) ([]byte, error) {
+	b := &bytes.Buffer{}
+
+	timestamp := entry.Data[StartUTC].(time.Time).Format(commonLogTimeFormat)
+	elapsedMillis := entry.Data[Duration].(time.Duration).Nanoseconds() / 1000000
+
+	_, err := fmt.Fprintf(b, "%s - %s [%s] \"%s %s %s\" %d %d %s %s %d %s %s %dms\n",
+		entry.Data[ClientHost],
+		entry.Data[ClientUsername],
+		timestamp,
+		entry.Data[RequestMethod],
+		entry.Data[RequestPath],
+		entry.Data[RequestProtocol],
+		entry.Data[OriginStatus],
+		entry.Data[OriginContentSize],
+		toLogString(entry.Data["request_Referer"]),
+		toLogString(entry.Data["request_User-Agent"]),
+		entry.Data[RequestCount],
+		toLogString(entry.Data[FrontendName]),
+		toLogString(entry.Data[BackendURL]),
+		elapsedMillis)
+
+	return b.Bytes(), err
+}
+
+func toLogString(v interface{}) string {
+	defaultValue := "-"
+	if v == nil {
+		return defaultValue
+	}
+
+	switch s := v.(type) {
+	case string:
+		return quoted(s, defaultValue)
+
+	case fmt.Stringer:
+		return quoted(s.String(), defaultValue)
+
+	default:
+		return defaultValue
+	}
+
+}
+
+func quoted(s string, defaultValue string) string {
+	if len(s) == 0 {
+		return defaultValue
+	}
+	return `"` + s + `"`
+}