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log.go 4.20 KB
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Jtyoui authored 2021-07-22 17:20 . Fabric-ca国密需要
// Package log implements a wrapper around the Go standard library's
// logging package. Clients should set the current log level; only
// messages below that level will actually be logged. For example, if
// Level is set to LevelWarning, only log messages at the Warning,
// Error, and Critical levels will be logged.
package log
import (
"fmt"
"log"
"os"
)
// The following constants represent logging levels in increasing levels of seriousness.
const (
// LevelDebug is the log level for Debug statements.
LevelDebug = iota
// LevelInfo is the log level for Info statements.
LevelInfo
// LevelWarning is the log level for Warning statements.
LevelWarning
// LevelError is the log level for Error statements.
LevelError
// LevelCritical is the log level for Critical statements.
LevelCritical
// LevelFatal is the log level for Fatal statements.
LevelFatal
)
var levelPrefix = [...]string{
LevelDebug: "DEBUG",
LevelInfo: "INFO",
LevelWarning: "WARNING",
LevelError: "ERROR",
LevelCritical: "CRITICAL",
LevelFatal: "FATAL",
}
// Level stores the current logging level.
var Level = LevelInfo
// SyslogWriter specifies the necessary methods for an alternate output
// destination passed in via SetLogger.
//
// SyslogWriter is satisfied by *syslog.Writer.
type SyslogWriter interface {
Debug(string)
Info(string)
Warning(string)
Err(string)
Crit(string)
Emerg(string)
}
// syslogWriter stores the SetLogger() parameter.
var syslogWriter SyslogWriter
// SetLogger sets the output used for output by this package.
// A *syslog.Writer is a good choice for the logger parameter.
// Call with a nil parameter to revert to default behavior.
func SetLogger(logger SyslogWriter) {
syslogWriter = logger
}
func print(l int, msg string) {
if l >= Level {
if syslogWriter != nil {
switch l {
case LevelDebug:
syslogWriter.Debug(msg)
case LevelInfo:
syslogWriter.Info(msg)
case LevelWarning:
syslogWriter.Warning(msg)
case LevelError:
syslogWriter.Err(msg)
case LevelCritical:
syslogWriter.Crit(msg)
case LevelFatal:
syslogWriter.Emerg(msg)
}
} else {
log.Printf("[%s] %s", levelPrefix[l], msg)
}
}
}
func outputf(l int, format string, v []interface{}) {
print(l, fmt.Sprintf(format, v...))
}
func output(l int, v []interface{}) {
print(l, fmt.Sprint(v...))
}
// Fatalf logs a formatted message at the "fatal" level and then exits. The
// arguments are handled in the same manner as fmt.Printf.
func Fatalf(format string, v ...interface{}) {
outputf(LevelFatal, format, v)
os.Exit(1)
}
// Fatal logs its arguments at the "fatal" level and then exits.
func Fatal(v ...interface{}) {
output(LevelFatal, v)
os.Exit(1)
}
// Criticalf logs a formatted message at the "critical" level. The
// arguments are handled in the same manner as fmt.Printf.
func Criticalf(format string, v ...interface{}) {
outputf(LevelCritical, format, v)
}
// Critical logs its arguments at the "critical" level.
func Critical(v ...interface{}) {
output(LevelCritical, v)
}
// Errorf logs a formatted message at the "error" level. The arguments
// are handled in the same manner as fmt.Printf.
func Errorf(format string, v ...interface{}) {
outputf(LevelError, format, v)
}
// Error logs its arguments at the "error" level.
func Error(v ...interface{}) {
output(LevelError, v)
}
// Warningf logs a formatted message at the "warning" level. The
// arguments are handled in the same manner as fmt.Printf.
func Warningf(format string, v ...interface{}) {
outputf(LevelWarning, format, v)
}
// Warning logs its arguments at the "warning" level.
func Warning(v ...interface{}) {
output(LevelWarning, v)
}
// Infof logs a formatted message at the "info" level. The arguments
// are handled in the same manner as fmt.Printf.
func Infof(format string, v ...interface{}) {
outputf(LevelInfo, format, v)
}
// Info logs its arguments at the "info" level.
func Info(v ...interface{}) {
output(LevelInfo, v)
}
// Debugf logs a formatted message at the "debug" level. The arguments
// are handled in the same manner as fmt.Printf.
func Debugf(format string, v ...interface{}) {
outputf(LevelDebug, format, v)
}
// Debug logs its arguments at the "debug" level.
func Debug(v ...interface{}) {
output(LevelDebug, v)
}
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