83 lines
2.1 KiB
Go
83 lines
2.1 KiB
Go
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package accesslog
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import (
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"bytes"
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"fmt"
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"time"
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"github.com/sirupsen/logrus"
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)
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// default format for time presentation
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const (
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commonLogTimeFormat = "02/Jan/2006:15:04:05 -0700"
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defaultValue = "-"
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)
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// CommonLogFormatter provides formatting in the Traefik common log format
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type CommonLogFormatter struct{}
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// Format formats the log entry in the Traefik common log format
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func (f *CommonLogFormatter) Format(entry *logrus.Entry) ([]byte, error) {
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b := &bytes.Buffer{}
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var timestamp = defaultValue
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if v, ok := entry.Data[StartUTC]; ok {
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timestamp = v.(time.Time).Format(commonLogTimeFormat)
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}
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var elapsedMillis int64
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if v, ok := entry.Data[Duration]; ok {
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elapsedMillis = v.(time.Duration).Nanoseconds() / 1000000
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}
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_, err := fmt.Fprintf(b, "%s - %s [%s] \"%s %s %s\" %v %v %s %s %v %s %s %dms\n",
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toLog(entry.Data, ClientHost, defaultValue, false),
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toLog(entry.Data, ClientUsername, defaultValue, false),
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timestamp,
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toLog(entry.Data, RequestMethod, defaultValue, false),
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toLog(entry.Data, RequestPath, defaultValue, false),
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toLog(entry.Data, RequestProtocol, defaultValue, false),
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toLog(entry.Data, OriginStatus, defaultValue, true),
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toLog(entry.Data, OriginContentSize, defaultValue, true),
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toLog(entry.Data, "request_Referer", `"-"`, true),
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toLog(entry.Data, "request_User-Agent", `"-"`, true),
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toLog(entry.Data, RequestCount, defaultValue, true),
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toLog(entry.Data, FrontendName, defaultValue, true),
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toLog(entry.Data, BackendURL, defaultValue, true),
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elapsedMillis)
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return b.Bytes(), err
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}
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func toLog(fields logrus.Fields, key string, defaultValue string, quoted bool) interface{} {
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if v, ok := fields[key]; ok {
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if v == nil {
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return defaultValue
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}
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switch s := v.(type) {
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case string:
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return toLogEntry(s, defaultValue, quoted)
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case fmt.Stringer:
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return toLogEntry(s.String(), defaultValue, quoted)
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default:
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return v
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}
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}
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return defaultValue
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}
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func toLogEntry(s string, defaultValue string, quote bool) string {
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if len(s) == 0 {
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return defaultValue
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}
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if quote {
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return `"` + s + `"`
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}
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return s
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}
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