68 lines
1.5 KiB
Go
68 lines
1.5 KiB
Go
package log
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import (
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"log"
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"strings"
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)
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type stdLogWriter struct {
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l *Logger
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opt *StandardLogOptions
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}
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func (l *stdLogWriter) Write(p []byte) (n int, err error) {
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str := strings.TrimSuffix(string(p), "\n")
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if l.opt != nil {
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switch l.opt.ForceLevel {
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case DebugLevel:
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l.l.Debug(str)
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case InfoLevel:
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l.l.Info(str)
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case WarnLevel:
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l.l.Warn(str)
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case ErrorLevel:
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l.l.Error(str)
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}
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} else {
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switch {
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case strings.HasPrefix(str, "DEBUG"):
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l.l.Debug(strings.TrimSpace(str[5:]))
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case strings.HasPrefix(str, "INFO"):
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l.l.Info(strings.TrimSpace(str[4:]))
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case strings.HasPrefix(str, "WARN"):
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l.l.Warn(strings.TrimSpace(str[4:]))
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case strings.HasPrefix(str, "ERROR"):
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l.l.Error(strings.TrimSpace(str[5:]))
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case strings.HasPrefix(str, "ERR"):
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l.l.Error(strings.TrimSpace(str[3:]))
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default:
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l.l.Info(str)
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}
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}
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return len(p), nil
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}
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// StandardLogOptions can be used to configure the standard log adapter.
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type StandardLogOptions struct {
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ForceLevel Level
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}
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// StandardLog returns a standard logger from Logger. The returned logger
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// can infer log levels from message prefix. Expected prefixes are DEBUG, INFO,
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// WARN, ERROR, and ERR.
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func (l *Logger) StandardLog(opts ...StandardLogOptions) *log.Logger {
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nl := l.With()
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// The caller stack is
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// log.Printf() -> l.Output() -> l.out.Write(stdLogger.Write)
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nl.callerOffset += 3
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sl := &stdLogWriter{
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l: nl,
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}
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if len(opts) > 0 {
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sl.opt = &opts[0]
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}
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return log.New(sl, "", 0)
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}
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