Golang如何开发HTTP请求日志记录系统

func loggingMiddleware(next http.Handler) http.Handler {
    return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
        start := time.Now()
        uri := r.RequestURI
        method := r.Method
        ip := r.RemoteAddr
        ua := r.Header.Get("User-Agent")

        // 包装ResponseWriter以捕获状态码
        rw := &responseWriter{ResponseWriter: w, statusCode: 200}
        next.ServeHTTP(rw, r)

        duration := time.Since(start)

        log.Printf(
            "%s | %s | %s | %s | %s | %d | %v",
            ip, method, uri, ua, r.Proto,
            rw.statusCode, duration,
        )
    })
}

// 自定义ResponseWriter以获取状态码
type responseWriter struct {
    http.ResponseWriter
    statusCode int
}

func (rw *responseWriter) WriteHeader(code int) {
    rw.statusCode = code
    rw.ResponseWriter.WriteHeader(code)
}

logger, _ := zap.NewProduction()
defer logger.Sync()

// 在中间件中使用
logger.Info("http request",
    zap.String("ip", ip),
    zap.String("method", method),
    zap.String("uri", uri),
    zap.String("user_agent", ua),
    zap.Int("status", rw.statusCode),
    zap.Duration("duration", duration),
)

&lumberjack.Logger{
    Filename:   "/var/log/myapp/access.log",
    MaxSize:    100, // MB
    MaxBackups: 3,
    MaxAge:     7, // 天
    Compress:   true,
}

writeSyncer := zapcore.AddSync(&lumberjack.Logger{...})
core := zapcore.NewCore(encoder, writeSyncer, level)
logger := zap.New(core)