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Gatedge.ScanCode/Common/FileLoggerProvider.cs

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+using System.Text;
+
+namespace Gatedge.ScanCode.Common
+{
+    /// <summary>
+    /// 文件日志帮助类
+    /// </summary>
+    public class FileLogger : ILogger
+    {
+        private readonly string _categoryName;
+        private readonly string _filePath;
+        private readonly long _maxFileSize; // 最大文件大小（字节）
+        private readonly int _maxRetainedFiles; // 最大保留文件数
+
+        /// <summary>
+        /// 构造函数
+        /// </summary>
+        /// <param name="categoryName"></param>
+        /// <param name="filePath"></param>
+        /// <param name="maxFileSize"></param>
+        /// <param name="maxRetainedFiles"></param>
+        public FileLogger(string categoryName, string filePath, long maxFileSize = 10 * 1024 * 1024, int maxRetainedFiles = 5)
+        {
+            _categoryName = categoryName;
+            _filePath = filePath;
+            _maxFileSize = maxFileSize;
+            _maxRetainedFiles = maxRetainedFiles;
+        }
+
+        /// <summary>
+        /// 开始
+        /// </summary>
+        /// <typeparam name="TState"></typeparam>
+        /// <param name="state"></param>
+        /// <returns></returns>
+        public IDisposable BeginScope<TState>(TState state) => null;
+
+        /// <summary>
+        /// 检测日志等级是否启用
+        /// </summary>
+        /// <param name="logLevel"></param>
+        /// <returns></returns>
+        public bool IsEnabled(LogLevel logLevel) => true;
+
+        /// <summary>
+        /// 写入日志
+        /// </summary>
+        /// <typeparam name="TState"></typeparam>
+        /// <param name="logLevel"></param>
+        /// <param name="eventId"></param>
+        /// <param name="state"></param>
+        /// <param name="exception"></param>
+        /// <param name="formatter"></param>
+        public void Log<TState>(
+            LogLevel logLevel,
+            EventId eventId,
+            TState state,
+            Exception exception,
+            Func<TState, Exception, string> formatter)
+        {
+            // 过滤日志级别（可选）
+            if (!IsEnabled(logLevel)) return;
+
+            // 格式化日志消息
+            var message = $"{DateTime.Now:yyyy-MM-dd HH:mm:ss} [{logLevel}] {_categoryName}: {formatter(state, exception)}{Environment.NewLine}";
+
+            // 确保目录存在
+            var directory = Path.GetDirectoryName(_filePath);
+            if (!Directory.Exists(directory))
+            {
+                Directory.CreateDirectory(directory);
+            }
+
+            // 检查文件大小并滚动
+            RollFileIfNeeded();
+
+            // 写入日志
+            File.AppendAllText(_filePath, message, Encoding.UTF8);
+        }
+
+        /// <summary>
+        /// 文件滚动刷新
+        /// </summary>
+        private void RollFileIfNeeded()
+        {
+            try
+            {
+                var fileInfo = new FileInfo(_filePath);
+                if (fileInfo.Exists && fileInfo.Length >= _maxFileSize)
+                {
+                    // 滚动文件命名：logs/app_20231005_001.log
+                    var timestamp = DateTime.Now.ToString("yyyyMMdd");
+                    var basePath = Path.Combine(
+                        Path.GetDirectoryName(_filePath),
+                        Path.GetFileNameWithoutExtension(_filePath)
+                    );
+                    var newFilePath = $"{basePath}_{timestamp}_{Guid.NewGuid():n}{Path.GetExtension(_filePath)}";
+                    File.Move(_filePath, newFilePath);
+
+                    // 清理旧文件
+                    var directory = new DirectoryInfo(Path.GetDirectoryName(_filePath));
+                    var files = directory.GetFiles($"{Path.GetFileNameWithoutExtension(_filePath)}_*")
+                        .OrderByDescending(f => f.CreationTime)
+                        .Skip(_maxRetainedFiles - 1)
+                        .ToList();
+
+                    foreach (var file in files)
+                    {
+                        file.Delete();
+                    }
+                }
+            }
+            catch
+            {
+                // 处理文件操作异常（如权限不足）
+            }
+        }
+    }
+
+    /// <summary>
+    /// 日志写入帮助类
+    /// </summary>
+    public class FileLoggerProvider : ILoggerProvider
+    {
+        private readonly string _filePath;
+        private readonly long _maxFileSize;
+        private readonly int _maxRetainedFiles;
+
+        /// <summary>
+        /// 构造函数
+        /// </summary>
+        /// <param name="filePath"></param>
+        /// <param name="maxFileSize"></param>
+        /// <param name="maxRetainedFiles"></param>
+        public FileLoggerProvider(string filePath, long maxFileSize, int maxRetainedFiles)
+        {
+            _filePath = filePath;
+            _maxFileSize = maxFileSize;
+            _maxRetainedFiles = maxRetainedFiles;
+        }
+        /// <summary>
+        /// 创建日志写入器
+        /// </summary>
+        /// <param name="categoryName"></param>
+        /// <returns></returns>
+        public ILogger CreateLogger(string categoryName)
+        {
+            return new FileLogger(categoryName, _filePath, _maxFileSize, _maxRetainedFiles);
+        }
+        /// <summary>
+        /// 清理资源
+        /// </summary>
+        public void Dispose()
+        {
+            // 清理资源（如需要）
+        }
+    }
+}