修改代码

增加云商品数据

Modules/CloudProduct/Services/RawDataStorage.cs

@@ -0,0 +1,82 @@
+using MAX.Core.DependencyInjection;
+using Microsoft.Extensions.Configuration;
+using System.IO.Compression;
+using System.Text;
+
+namespace Store.Modules.CloudProduct.Services
+{
+	/// <summary>
+	/// 商品原始数据文件存储：按 goodsId % 100 分目录，文件名即商品ID，GZip 压缩保存。
+	/// </summary>
+	public interface IRawDataStorage : IScopedDependency
+	{
+		/// <summary>
+		/// 保存原始数据，返回保存后的完整路径。
+		/// </summary>
+		Task<string> SaveAsync(long goodsId, string rawData);
+
+		/// <summary>
+		/// 读取并解压原始数据；文件不存在时返回 null。
+		/// </summary>
+		Task<string?> ReadAsync(long goodsId);
+
+		/// <summary>
+		/// 判断指定商品的原始数据文件是否存在。
+		/// </summary>
+		bool Exists(long goodsId);
+	}
+
+	internal class RawDataStorage : IRawDataStorage
+	{
+		private readonly string _rootPath;
+
+		public RawDataStorage(IConfiguration configuration)
+		{
+			var configured = configuration.GetValue<string>("RawData:Path");
+			if (string.IsNullOrWhiteSpace(configured))
+				configured = "RawData";
+
+			_rootPath = Path.GetFullPath(configured);
+		}
+
+		/// <inheritdoc />
+		public async Task<string> SaveAsync(long goodsId, string rawData)
+		{
+			var filePath = GetFilePath(goodsId);
+			var dir = Path.GetDirectoryName(filePath)!;
+			Directory.CreateDirectory(dir);
+
+			await using var fileStream = new FileStream(filePath, FileMode.Create, FileAccess.Write, FileShare.None);
+			await using var gzip = new GZipStream(fileStream, CompressionLevel.Fastest);
+			await using var writer = new StreamWriter(gzip, new UTF8Encoding(false));
+			await writer.WriteAsync(rawData);
+
+			return filePath;
+		}
+
+		/// <inheritdoc />
+		public async Task<string?> ReadAsync(long goodsId)
+		{
+			var filePath = GetFilePath(goodsId);
+			if (!File.Exists(filePath))
+				return null;
+
+			await using var fileStream = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read);
+			await using var gzip = new GZipStream(fileStream, CompressionMode.Decompress);
+			using var reader = new StreamReader(gzip, new UTF8Encoding(false));
+			return await reader.ReadToEndAsync();
+		}
+
+		/// <inheritdoc />
+		public bool Exists(long goodsId)
+		{
+			return File.Exists(GetFilePath(goodsId));
+		}
+
+		private string GetFilePath(long goodsId)
+		{
+			var subDir = (goodsId % 100).ToString();
+			return Path.Combine(_rootPath, subDir, goodsId.ToString());
+		}
+	}
+}