115 lines
2.9 KiB
Go
115 lines
2.9 KiB
Go
package main
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import (
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"io"
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"os"
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"path/filepath"
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"time"
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"github.com/gin-gonic/gin"
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"github.com/sirupsen/logrus"
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)
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// Logger is the global logger instance
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var Logger *logrus.Logger
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// InitLogger initializes the structured logger with file output
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func InitLogger(config *Config) error {
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Logger = logrus.New()
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// Set log level based on configuration
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level, err := logrus.ParseLevel(config.LogLevel)
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if err != nil {
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level = logrus.InfoLevel
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}
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Logger.SetLevel(level)
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// Set JSON formatter for structured logging
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Logger.SetFormatter(&logrus.JSONFormatter{
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TimestampFormat: time.RFC3339,
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FieldMap: logrus.FieldMap{
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logrus.FieldKeyTime: "timestamp",
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logrus.FieldKeyLevel: "level",
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logrus.FieldKeyMsg: "message",
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},
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})
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// Create log directory if it doesn't exist
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if err := os.MkdirAll(config.LogDir, 0755); err != nil {
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return err
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}
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// Create log file with timestamp
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logFile := filepath.Join(config.LogDir, "app.log")
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file, err := os.OpenFile(logFile, os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
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if err != nil {
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return err
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}
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// Set output to both file and stdout
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multiWriter := io.MultiWriter(os.Stdout, file)
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Logger.SetOutput(multiWriter)
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// Log initialization with default fields
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Logger.WithFields(logrus.Fields{
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"service": "counter-app",
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"environment": string(config.Environment),
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"version": "1.0.0",
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}).Info("Logger initialized successfully")
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return nil
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}
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// GetLogger returns the global logger instance
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func GetLogger() *logrus.Logger {
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if Logger == nil {
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// Fallback to standard logger if not initialized
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logrus.SetFormatter(&logrus.JSONFormatter{
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TimestampFormat: time.RFC3339,
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})
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return logrus.StandardLogger()
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}
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return Logger
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}
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// GetLoggerWithDefaults returns a logger entry with default fields
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func GetLoggerWithDefaults(env Environment) *logrus.Entry {
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return Logger.WithFields(logrus.Fields{
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"service": "counter-app",
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"environment": string(env),
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"version": "1.0.0",
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})
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}
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// LoggingMiddleware creates a Gin middleware for HTTP request logging
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func LoggingMiddleware(config *Config) gin.HandlerFunc {
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return gin.LoggerWithFormatter(func(param gin.LogFormatterParams) string {
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// Create structured log entry with default fields
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entry := Logger.WithFields(logrus.Fields{
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"service": "counter-app",
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"environment": string(config.Environment),
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"version": "1.0.0",
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"method": param.Method,
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"path": param.Path,
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"status": param.StatusCode,
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"latency": param.Latency.String(),
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"client_ip": param.ClientIP,
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"user_agent": param.Request.UserAgent(),
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"timestamp": param.TimeStamp.Format(time.RFC3339),
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})
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// Set log level based on status code
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switch {
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case param.StatusCode >= 500:
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entry.Error("HTTP Request")
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case param.StatusCode >= 400:
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entry.Warn("HTTP Request")
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default:
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entry.Info("HTTP Request")
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}
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// Return empty string since we're handling logging ourselves
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return ""
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})
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}
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