Client/GameClient/Assets/YooAsset/Runtime/Utility/YooUtility.cs

using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Security.Cryptography;

namespace YooAsset
{
	/// <summary>
	/// 路径工具类
	/// </summary>
	internal static class PathUtility
	{
		/// <summary>
		/// 路径归一化
		/// 注意：替换为Linux路径格式
		/// </summary>
		public static string RegularPath(string path)
		{
			return path.Replace('\\', '/').Replace("\\", "/");
		}
		
		/// <summary>
		/// 移除路径里的后缀名
		/// </summary>
		public static string RemoveExtension(string str)
		{
			if (string.IsNullOrEmpty(str))
				return str;

			int index = str.LastIndexOf(".");
			if (index == -1)
				return str;
			else
				return str.Remove(index); //"assets/config/test.unity3d" --> "assets/config/test"
		}

		/// <summary>
		/// 合并路径
		/// </summary>
		public static string Combine(string path1, string path2)
		{		
			return StringUtility.Format("{0}/{1}", path1, path2);
		}

		/// <summary>
		/// 合并路径
		/// </summary>
		public static string Combine(string path1, string path2, string path3)
		{
			return StringUtility.Format("{0}/{1}/{2}", path1, path2, path3);
		}

		/// <summary>
		/// 合并路径
		/// </summary>
		public static string Combine(string path1, string path2, string path3, string path4)
		{
			return StringUtility.Format("{0}/{1}/{2}/{3}", path1, path2, path3, path4);
		}
	}

	/// <summary>
	/// 字符串工具类
	/// </summary>
	internal static class StringUtility
	{
		[ThreadStatic]
		private static StringBuilder _cacheBuilder = new StringBuilder(2048);

		public static string Format(string format, object arg0)
		{
			if (string.IsNullOrEmpty(format))
				throw new ArgumentNullException();

			_cacheBuilder.Length = 0;
			_cacheBuilder.AppendFormat(format, arg0);
			return _cacheBuilder.ToString();
		}
		public static string Format(string format, object arg0, object arg1)
		{
			if (string.IsNullOrEmpty(format))
				throw new ArgumentNullException();

			_cacheBuilder.Length = 0;
			_cacheBuilder.AppendFormat(format, arg0, arg1);
			return _cacheBuilder.ToString();
		}
		public static string Format(string format, object arg0, object arg1, object arg2)
		{
			if (string.IsNullOrEmpty(format))
				throw new ArgumentNullException();

			_cacheBuilder.Length = 0;
			_cacheBuilder.AppendFormat(format, arg0, arg1, arg2);
			return _cacheBuilder.ToString();
		}
		public static string Format(string format, params object[] args)
		{
			if (string.IsNullOrEmpty(format))
				throw new ArgumentNullException();

			if (args == null)
				throw new ArgumentNullException();

			_cacheBuilder.Length = 0;
			_cacheBuilder.AppendFormat(format, args);
			return _cacheBuilder.ToString();
		}
	}

	/// <summary>
	/// 文件工具类
	/// </summary>
	internal static class FileUtility
	{
		/// <summary>
		/// 读取文件的文本数据
		/// </summary>
		public static string ReadAllText(string filePath)
		{
			if (File.Exists(filePath) == false)
				return string.Empty;
			return File.ReadAllText(filePath, Encoding.UTF8);
		}

		/// <summary>
		/// 读取文件的字节数据
		/// </summary>
		public static byte[] ReadAllBytes(string filePath)
		{
			if (File.Exists(filePath) == false)
				return null;
			return File.ReadAllBytes(filePath);
		}

		/// <summary>
		/// 写入文本数据（会覆盖指定路径的文件）
		/// </summary>
		public static void WriteAllText(string filePath, string content)
		{
			// 创建文件夹路径
			CreateFileDirectory(filePath);

			byte[] bytes = Encoding.UTF8.GetBytes(content);
			File.WriteAllBytes(filePath, bytes); //避免写入BOM标记
		}

		/// <summary>
		/// 写入字节数据（会覆盖指定路径的文件）
		/// </summary>
		public static void WriteAllBytes(string filePath, byte[] data)
		{
			// 创建文件夹路径
			CreateFileDirectory(filePath);

			File.WriteAllBytes(filePath, data);
		}

		/// <summary>
		/// 创建文件的文件夹路径
		/// </summary>
		public static void CreateFileDirectory(string filePath)
		{
			// 获取文件的文件夹路径
			string directory = Path.GetDirectoryName(filePath);
			CreateDirectory(directory);
		}

		/// <summary>
		/// 创建文件夹路径
		/// </summary>
		public static void CreateDirectory(string directory)
		{
			// If the directory doesn't exist, create it.
			if (Directory.Exists(directory) == false)
				Directory.CreateDirectory(directory);
		}

		/// <summary>
		/// 获取文件大小（字节数）
		/// </summary>
		public static long GetFileSize(string filePath)
		{
			FileInfo fileInfo = new FileInfo(filePath);
			return fileInfo.Length;
		}
	}

	/// <summary>
	/// 哈希工具类
	/// </summary>
	internal static class HashUtility
	{
		private static string ToString(byte[] hashBytes)
		{
			string result = BitConverter.ToString(hashBytes);
			result = result.Replace("-", "");
			return result.ToLower();
		}

		#region SHA1
		/// <summary>
		/// 获取字符串的Hash值
		/// </summary>
		public static string StringSHA1(string str)
		{
			byte[] buffer = Encoding.UTF8.GetBytes(str);
			return BytesSHA1(buffer);
		}

		/// <summary>
		/// 获取文件的Hash值
		/// </summary>
		public static string FileSHA1(string filePath)
		{
			try
			{
				using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
				{
					return StreamSHA1(fs);
				}
			}
			catch (Exception e)
			{
				YooLogger.Exception(e);
				return string.Empty;
			}
		}

		/// <summary>
		/// 获取数据流的Hash值
		/// </summary>
		public static string StreamSHA1(Stream stream)
		{
			// 说明：创建的是SHA1类的实例，生成的是160位的散列码
			HashAlgorithm hash = HashAlgorithm.Create();
			byte[] hashBytes = hash.ComputeHash(stream);
			return ToString(hashBytes);
		}

		/// <summary>
		/// 获取字节数组的Hash值
		/// </summary>
		public static string BytesSHA1(byte[] buffer)
		{
			// 说明：创建的是SHA1类的实例，生成的是160位的散列码
			HashAlgorithm hash = HashAlgorithm.Create();
			byte[] hashBytes = hash.ComputeHash(buffer);
			return ToString(hashBytes);
		}
		#endregion

		#region MD5
		/// <summary>
		/// 获取字符串的MD5
		/// </summary>
		public static string StringMD5(string str)
		{
			byte[] buffer = Encoding.UTF8.GetBytes(str);
			return BytesMD5(buffer);
		}

		/// <summary>
		/// 获取文件的MD5
		/// </summary>
		public static string FileMD5(string filePath)
		{
			try
			{
				using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
				{
					return StreamMD5(fs);
				}
			}
			catch (Exception e)
			{
				YooLogger.Exception(e);
				return string.Empty;
			}
		}

		/// <summary>
		/// 获取数据流的MD5
		/// </summary>
		public static string StreamMD5(Stream stream)
		{
			MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider();
			byte[] hashBytes = provider.ComputeHash(stream);
			return ToString(hashBytes);
		}

		/// <summary>
		/// 获取字节数组的MD5
		/// </summary>
		public static string BytesMD5(byte[] buffer)
		{
			MD5CryptoServiceProvider provider = new MD5CryptoServiceProvider();
			byte[] hashBytes = provider.ComputeHash(buffer);
			return ToString(hashBytes);
		}
		#endregion

		#region CRC32
		/// <summary>
		/// 获取字符串的CRC32
		/// </summary>
		public static string StringCRC32(string str)
		{
			byte[] buffer = Encoding.UTF8.GetBytes(str);
			return BytesCRC32(buffer);
		}

		/// <summary>
		/// 获取文件的CRC32
		/// </summary>
		public static string FileCRC32(string filePath)
		{
			try
			{
				using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read, FileShare.Read))
				{
					return StreamCRC32(fs);
				}
			}
			catch (Exception e)
			{
				YooLogger.Exception(e);
				return string.Empty;
			}
		}

		/// <summary>
		/// 获取数据流的CRC32
		/// </summary>
		public static string StreamCRC32(Stream stream)
		{
			CRC32Algorithm hash = new CRC32Algorithm();
			byte[] hashBytes = hash.ComputeHash(stream);
			return ToString(hashBytes);
		}

		/// <summary>
		/// 获取字节数组的CRC32
		/// </summary>
		public static string BytesCRC32(byte[] buffer)
		{
			CRC32Algorithm hash = new CRC32Algorithm();
			byte[] hashBytes = hash.ComputeHash(buffer);
			return ToString(hashBytes);
		}
		#endregion
	}
}