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			381 lines
		
	
	
		
			6.9 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
			
		
		
	
	
			381 lines
		
	
	
		
			6.9 KiB
		
	
	
	
		
			Go
		
	
	
	
	
	
//high level log wrapper, so it can output different log based on level
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package log
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import (
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	"fmt"
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	"io"
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	"log"
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	"os"
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	"runtime"
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	"sync"
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	"time"
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)
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const (
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	Ldate         = log.Ldate
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	Llongfile     = log.Llongfile
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	Lmicroseconds = log.Lmicroseconds
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	Lshortfile    = log.Lshortfile
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	LstdFlags     = log.LstdFlags
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	Ltime         = log.Ltime
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)
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type (
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	LogLevel int
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	LogType  int
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)
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const (
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	LOG_FATAL   = LogType(0x1)
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	LOG_ERROR   = LogType(0x2)
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	LOG_WARNING = LogType(0x4)
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	LOG_INFO    = LogType(0x8)
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	LOG_DEBUG   = LogType(0x10)
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)
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const (
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	LOG_LEVEL_NONE  = LogLevel(0x0)
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	LOG_LEVEL_FATAL = LOG_LEVEL_NONE | LogLevel(LOG_FATAL)
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	LOG_LEVEL_ERROR = LOG_LEVEL_FATAL | LogLevel(LOG_ERROR)
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	LOG_LEVEL_WARN  = LOG_LEVEL_ERROR | LogLevel(LOG_WARNING)
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	LOG_LEVEL_INFO  = LOG_LEVEL_WARN | LogLevel(LOG_INFO)
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	LOG_LEVEL_DEBUG = LOG_LEVEL_INFO | LogLevel(LOG_DEBUG)
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	LOG_LEVEL_ALL   = LOG_LEVEL_DEBUG
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)
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const FORMAT_TIME_DAY string = "20060102"
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const FORMAT_TIME_HOUR string = "2006010215"
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var _log *logger = New()
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func init() {
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	SetFlags(Ldate | Ltime | Lshortfile)
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	SetHighlighting(runtime.GOOS != "windows")
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}
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func Logger() *log.Logger {
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	return _log._log
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}
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func SetLevel(level LogLevel) {
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	_log.SetLevel(level)
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}
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func GetLogLevel() LogLevel {
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	return _log.level
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}
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func SetOutput(out io.Writer) {
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	_log.SetOutput(out)
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}
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func SetOutputByName(path string) error {
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	return _log.SetOutputByName(path)
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}
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func SetFlags(flags int) {
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	_log._log.SetFlags(flags)
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}
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func Info(v ...interface{}) {
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	_log.Info(v...)
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}
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func Infof(format string, v ...interface{}) {
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	_log.Infof(format, v...)
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}
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func Debug(v ...interface{}) {
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	_log.Debug(v...)
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}
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func Debugf(format string, v ...interface{}) {
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	_log.Debugf(format, v...)
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}
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func Warn(v ...interface{}) {
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	_log.Warning(v...)
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}
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func Warnf(format string, v ...interface{}) {
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	_log.Warningf(format, v...)
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}
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func Warning(v ...interface{}) {
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	_log.Warning(v...)
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}
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func Warningf(format string, v ...interface{}) {
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	_log.Warningf(format, v...)
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}
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func Error(v ...interface{}) {
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	_log.Error(v...)
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}
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func Errorf(format string, v ...interface{}) {
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	_log.Errorf(format, v...)
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}
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func Fatal(v ...interface{}) {
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	_log.Fatal(v...)
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}
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func Fatalf(format string, v ...interface{}) {
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	_log.Fatalf(format, v...)
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}
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func SetLevelByString(level string) {
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	_log.SetLevelByString(level)
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}
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func SetHighlighting(highlighting bool) {
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	_log.SetHighlighting(highlighting)
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}
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func SetRotateByDay() {
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	_log.SetRotateByDay()
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}
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func SetRotateByHour() {
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	_log.SetRotateByHour()
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}
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type logger struct {
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	_log         *log.Logger
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	level        LogLevel
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	highlighting bool
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	dailyRolling bool
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	hourRolling  bool
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	fileName  string
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	logSuffix string
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	fd        *os.File
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	lock sync.Mutex
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}
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func (l *logger) SetHighlighting(highlighting bool) {
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	l.highlighting = highlighting
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}
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func (l *logger) SetLevel(level LogLevel) {
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	l.level = level
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}
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func (l *logger) SetLevelByString(level string) {
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	l.level = StringToLogLevel(level)
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}
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func (l *logger) SetRotateByDay() {
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	l.dailyRolling = true
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	l.logSuffix = genDayTime(time.Now())
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}
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func (l *logger) SetRotateByHour() {
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	l.hourRolling = true
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	l.logSuffix = genHourTime(time.Now())
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}
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func (l *logger) rotate() error {
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	l.lock.Lock()
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	defer l.lock.Unlock()
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	var suffix string
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	if l.dailyRolling {
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		suffix = genDayTime(time.Now())
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	} else if l.hourRolling {
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		suffix = genHourTime(time.Now())
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	} else {
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		return nil
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	}
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	// Notice: if suffix is not equal to l.LogSuffix, then rotate
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	if suffix != l.logSuffix {
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		err := l.doRotate(suffix)
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		if err != nil {
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			return err
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		}
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	}
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	return nil
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}
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func (l *logger) doRotate(suffix string) error {
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	// Notice: Not check error, is this ok?
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	l.fd.Close()
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	lastFileName := l.fileName + "." + l.logSuffix
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	err := os.Rename(l.fileName, lastFileName)
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	if err != nil {
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		return err
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	}
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	err = l.SetOutputByName(l.fileName)
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	if err != nil {
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		return err
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	}
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	l.logSuffix = suffix
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	return nil
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}
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func (l *logger) SetOutput(out io.Writer) {
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	l._log = log.New(out, l._log.Prefix(), l._log.Flags())
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}
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func (l *logger) SetOutputByName(path string) error {
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	f, err := os.OpenFile(path, os.O_CREATE|os.O_APPEND|os.O_RDWR, 0666)
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	if err != nil {
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		log.Fatal(err)
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	}
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	l.SetOutput(f)
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	l.fileName = path
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	l.fd = f
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	return err
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}
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func (l *logger) log(t LogType, v ...interface{}) {
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	if l.level|LogLevel(t) != l.level {
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		return
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	}
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	err := l.rotate()
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	if err != nil {
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		fmt.Fprintf(os.Stderr, "%s\n", err.Error())
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		return
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	}
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	v1 := make([]interface{}, len(v)+2)
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	logStr, logColor := LogTypeToString(t)
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	if l.highlighting {
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		v1[0] = "\033" + logColor + "m[" + logStr + "]"
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		copy(v1[1:], v)
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		v1[len(v)+1] = "\033[0m"
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	} else {
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		v1[0] = "[" + logStr + "]"
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		copy(v1[1:], v)
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		v1[len(v)+1] = ""
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	}
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	s := fmt.Sprintln(v1...)
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	l._log.Output(4, s)
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}
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func (l *logger) logf(t LogType, format string, v ...interface{}) {
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	if l.level|LogLevel(t) != l.level {
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		return
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	}
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	err := l.rotate()
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	if err != nil {
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		fmt.Fprintf(os.Stderr, "%s\n", err.Error())
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		return
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	}
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	logStr, logColor := LogTypeToString(t)
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	var s string
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	if l.highlighting {
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		s = "\033" + logColor + "m[" + logStr + "] " + fmt.Sprintf(format, v...) + "\033[0m"
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	} else {
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		s = "[" + logStr + "] " + fmt.Sprintf(format, v...)
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	}
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	l._log.Output(4, s)
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}
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func (l *logger) Fatal(v ...interface{}) {
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	l.log(LOG_FATAL, v...)
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	os.Exit(-1)
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}
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func (l *logger) Fatalf(format string, v ...interface{}) {
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	l.logf(LOG_FATAL, format, v...)
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	os.Exit(-1)
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}
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func (l *logger) Error(v ...interface{}) {
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	l.log(LOG_ERROR, v...)
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}
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func (l *logger) Errorf(format string, v ...interface{}) {
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	l.logf(LOG_ERROR, format, v...)
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}
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func (l *logger) Warning(v ...interface{}) {
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	l.log(LOG_WARNING, v...)
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}
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func (l *logger) Warningf(format string, v ...interface{}) {
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	l.logf(LOG_WARNING, format, v...)
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}
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func (l *logger) Debug(v ...interface{}) {
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	l.log(LOG_DEBUG, v...)
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}
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func (l *logger) Debugf(format string, v ...interface{}) {
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	l.logf(LOG_DEBUG, format, v...)
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}
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func (l *logger) Info(v ...interface{}) {
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	l.log(LOG_INFO, v...)
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}
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func (l *logger) Infof(format string, v ...interface{}) {
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	l.logf(LOG_INFO, format, v...)
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}
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func StringToLogLevel(level string) LogLevel {
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	switch level {
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	case "fatal":
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		return LOG_LEVEL_FATAL
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	case "error":
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		return LOG_LEVEL_ERROR
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	case "warn":
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		return LOG_LEVEL_WARN
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	case "warning":
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		return LOG_LEVEL_WARN
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	case "debug":
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		return LOG_LEVEL_DEBUG
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	case "info":
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		return LOG_LEVEL_INFO
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	}
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	return LOG_LEVEL_ALL
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}
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func LogTypeToString(t LogType) (string, string) {
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	switch t {
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	case LOG_FATAL:
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		return "fatal", "[0;31"
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	case LOG_ERROR:
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		return "error", "[0;31"
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	case LOG_WARNING:
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		return "warning", "[0;33"
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	case LOG_DEBUG:
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		return "debug", "[0;36"
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	case LOG_INFO:
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		return "info", "[0;37"
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	}
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	return "unknown", "[0;37"
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}
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func genDayTime(t time.Time) string {
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	return t.Format(FORMAT_TIME_DAY)
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}
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func genHourTime(t time.Time) string {
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	return t.Format(FORMAT_TIME_HOUR)
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}
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func New() *logger {
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	return Newlogger(os.Stderr, "")
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}
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func Newlogger(w io.Writer, prefix string) *logger {
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	return &logger{_log: log.New(w, prefix, LstdFlags), level: LOG_LEVEL_ALL, highlighting: true}
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}
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