新建DNS服务器

logger/logger.go

@@ -0,0 +1,134 @@
+package logger
+
+import (
+	"io"
+	"os"
+	"sync"
+
+	"github.com/sirupsen/logrus"
+)
+
+var (
+	log         *logrus.Logger
+	logMutex    sync.Mutex
+	initialized bool
+)
+
+// InitLogger 初始化日志系统
+func InitLogger(logFile, level string, maxSize, maxBackups, maxAge int) error {
+	logMutex.Lock()
+	defer logMutex.Unlock()
+
+	if initialized {
+		return nil
+	}
+
+	log = logrus.New()
+
+	// 配置日志格式
+	log.SetFormatter(&logrus.TextFormatter{
+		FullTimestamp: true,
+	})
+
+	// 设置输出目标
+	if logFile != "" {
+		// 使用标准库打开文件，支持追加写入
+		file, err := os.OpenFile(logFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0644)
+		if err != nil {
+			logrus.Warn("无法打开日志文件，将使用标准输出", "error", err)
+			log.SetOutput(os.Stdout)
+		} else {
+			// 同时输出到文件和标准输出
+			log.SetOutput(io.MultiWriter(file, os.Stdout))
+		}
+	} else {
+		log.SetOutput(os.Stdout)
+	}
+
+	// 设置日志级别
+	logLevel, err := logrus.ParseLevel(level)
+	if err != nil {
+		logLevel = logrus.InfoLevel
+	}
+	log.SetLevel(logLevel)
+
+	initialized = true
+	return nil
+}
+
+// Close 关闭日志系统
+func Close() {
+	logMutex.Lock()
+	defer logMutex.Unlock()
+
+	if !initialized {
+		return
+	}
+
+	// 执行日志刷新
+	log.Warn("日志系统已关闭")
+	initialized = false
+}
+
+// Info 记录信息级别日志
+func Info(msg string, fields ...interface{}) {
+	if !initialized {
+		return
+	}
+
+	if len(fields) > 0 {
+		log.WithFields(toFields(fields)).Info(msg)
+	} else {
+		log.Info(msg)
+	}
+}
+
+// Error 记录错误级别日志
+func Error(msg string, fields ...interface{}) {
+	if !initialized {
+		return
+	}
+
+	if len(fields) > 0 {
+		log.WithFields(toFields(fields)).Error(msg)
+	} else {
+		log.Error(msg)
+	}
+}
+
+// Debug 记录调试级别日志
+func Debug(msg string, fields ...interface{}) {
+	if !initialized {
+		return
+	}
+
+	if len(fields) > 0 {
+		log.WithFields(toFields(fields)).Debug(msg)
+	} else {
+		log.Debug(msg)
+	}
+}
+
+// Warn 记录警告级别日志
+func Warn(msg string, fields ...interface{}) {
+	if !initialized {
+		return
+	}
+
+	if len(fields) > 0 {
+		log.WithFields(toFields(fields)).Warn(msg)
+	} else {
+		log.Warn(msg)
+	}
+}
+
+// toFields 将键值对转换为logrus字段
+func toFields(keyValues []interface{}) logrus.Fields {
+	fields := make(logrus.Fields)
+	for i := 0; i < len(keyValues); i += 2 {
+		if i+1 < len(keyValues) {
+			fields[keyValues[i].(string)] = keyValues[i+1]
+		}
+	}
+	return fields
+}