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Merge pull request #83 from AMagicPear/feature/game
optimize: 优雅！优雅！还是tmd优雅！
2 parents 3a6955c + 337b962 commit ca1cc9b

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‎PCL.Neo.Core/FileExtension.cs‎

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@@ -0,0 +1,84 @@
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using PCL.Neo.Core.Utils;
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Runtime.Versioning;
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namespace PCL.Neo.Core;
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/// <summary>
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/// 一些文件操作和下载请求之类的
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/// </summary>
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public static class FileExtension
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{
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/// <summary>
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/// 校验文件流与SHA-1是否匹配
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/// </summary>
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/// <param name="fileStream">文件流</param>
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/// <param name="sha1">SHA-1</param>
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/// <returns>是否匹配</returns>
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public static async Task<bool> CheckSha1(this FileStream fileStream, string sha1)
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{
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using var sha1Provider = System.Security.Cryptography.SHA1.Create();
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fileStream.Position = 0; // 重置文件流位置
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var computedHash = await sha1Provider.ComputeHashAsync(fileStream);
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var computedHashString = Convert.ToHexStringLower(computedHash);
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return string.Equals(computedHashString, sha1, StringComparison.OrdinalIgnoreCase);
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}
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/// <summary>
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/// 在 Unix 系统中给予可执行文件运行权限
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/// </summary>
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/// <param name="path">文件路径</param>
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[SupportedOSPlatform(nameof(OSPlatform.OSX))]
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[SupportedOSPlatform(nameof(OSPlatform.Linux))]
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public static void SetFileExecutableUnix(this string path)
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{
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if (SystemUtils.Os is SystemUtils.RunningOs.Windows) return;
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try
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{
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var currentMode = File.GetUnixFileMode(path);
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var newMode = currentMode | UnixFileMode.UserExecute | UnixFileMode.GroupExecute |
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UnixFileMode.OtherExecute;
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File.SetUnixFileMode(path, newMode);
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}
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catch (Exception e)
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{
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Console.WriteLine($"无法设置可执行权限：{e.Message}");
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throw;
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}
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}
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/// <summary>
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/// 从某个地方抄来的很像 C 语言风格的解压 LZMA 压缩算法的函数
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/// </summary>
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/// <param name="inStream">被压缩的文件流</param>
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/// <param name="outputFile">输出文件路径</param>
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/// <returns>解压后的文件流</returns>
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public static FileStream? DecompressLZMA(this FileStream inStream, string outputFile)
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{
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inStream.Position = 0;
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var outStream = new FileStream(outputFile, FileMode.Create, FileAccess.ReadWrite);
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byte[] decodeProperties = new byte[5];
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int n = inStream.Read(decodeProperties, 0, 5);
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Debug.Assert(n == 5);
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SevenZip.Compression.LZMA.Decoder decoder = new();
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decoder.SetDecoderProperties(decodeProperties);
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long outSize = 0;
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for (int i = 0; i < 8; i++)
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{
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int v = inStream.ReadByte();
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if (v < 0)
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{
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Console.WriteLine("read outSize error.");
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return null;
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}
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outSize |= (long)(byte)v << (8 * i);
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}
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long compressedSize = inStream.Length - inStream.Position;
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decoder.Code(inStream, outStream, compressedSize, outSize, null);
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inStream.Close();
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return outStream;
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}
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}

‎PCL.Neo.Core/Helpers/FileHelper.cs‎ renamed to ‎PCL.Neo.Core/Models/DownloadService.cs‎

Lines changed: 11 additions & 82 deletions
Original file line numberDiff line numberDiff line change
@@ -1,15 +1,15 @@
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using System.Diagnostics;
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using System.Runtime.InteropServices;
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using System.Runtime.Versioning;
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namespace PCL.Neo.Core.Helpers;
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namespace PCL.Neo.Core.Models;
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/// <summary>
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/// 一些文件操作和下载请求之类的
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/// 下载任务管理器
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/// 之所以不static是因为后续可能需要接入进度显示和下载统计
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/// </summary>
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public static class FileHelper
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public class DownloadService
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{
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public static readonly HttpClient HttpClient = new();
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/// <summary>
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/// 一个static的HttpClient，以便在任何地方调用
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/// </summary>
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public static HttpClient HttpClient { get; } = new();
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/// <summary>
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/// 从某个 URL 下载并保存文件
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/// <param name="maxRetries">最大重试次数</param>
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/// <param name="cancellationToken">用于取消</param>
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/// <returns>向外传递的文件流</returns>
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public static async Task<FileStream?> DownloadFileAsync(
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public async Task<FileStream?> DownloadFileAsync(
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Uri uri, string localFilePath, string? sha1 = null, bool passStreamDown = false, int maxRetries = 3,
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CancellationToken cancellationToken = default)
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{
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try
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{
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await response.Content.CopyToAsync(fileStream, cancellationToken);
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response.EnsureSuccessStatusCode();
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if (!string.IsNullOrEmpty(sha1))
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{
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fileStream.Position = 0;
@@ -73,82 +74,10 @@ public static class FileHelper
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}
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}
7576

76-
/// <summary>
77-
/// 校验文件流与SHA-1是否匹配
78-
/// </summary>
79-
/// <param name="fileStream">文件流</param>
80-
/// <param name="sha1">SHA-1</param>
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/// <returns>是否匹配</returns>
82-
private static async Task<bool> CheckSha1(this FileStream fileStream, string sha1)
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{
84-
using var sha1Provider = System.Security.Cryptography.SHA1.Create();
85-
fileStream.Position = 0; // 重置文件流位置
86-
var computedHash = await sha1Provider.ComputeHashAsync(fileStream);
87-
var computedHashString = Convert.ToHexStringLower(computedHash);
88-
return string.Equals(computedHashString, sha1, StringComparison.OrdinalIgnoreCase);
89-
}
90-
91-
/// <summary>
92-
/// 在 Unix 系统中给予可执行文件运行权限
93-
/// </summary>
94-
/// <param name="path">文件路径</param>
95-
[SupportedOSPlatform(nameof(OSPlatform.OSX))]
96-
[SupportedOSPlatform(nameof(OSPlatform.Linux))]
97-
public static void SetFileExecutableUnix(this string path)
98-
{
99-
if (Const.Os is Const.RunningOs.Windows) return;
100-
try
101-
{
102-
var currentMode = File.GetUnixFileMode(path);
103-
var newMode = currentMode | UnixFileMode.UserExecute | UnixFileMode.GroupExecute |
104-
UnixFileMode.OtherExecute;
105-
File.SetUnixFileMode(path, newMode);
106-
}
107-
catch (Exception e)
108-
{
109-
Console.WriteLine($"无法设置可执行权限：{e.Message}");
110-
throw;
111-
}
112-
}
113-
114-
/// <summary>
115-
/// 从某个地方抄来的很像 C 语言风格的解压 LZMA 压缩算法的函数
116-
/// </summary>
117-
/// <param name="inStream">被压缩的文件流</param>
118-
/// <param name="outputFile">输出文件路径</param>
119-
/// <returns>解压后的文件流</returns>
120-
private static FileStream? DecompressLZMA(this FileStream inStream, string outputFile)
121-
{
122-
inStream.Position = 0;
123-
var outStream = new FileStream(outputFile, FileMode.Create, FileAccess.ReadWrite);
124-
byte[] decodeProperties = new byte[5];
125-
int n = inStream.Read(decodeProperties, 0, 5);
126-
Debug.Assert(n == 5);
127-
SevenZip.Compression.LZMA.Decoder decoder = new();
128-
decoder.SetDecoderProperties(decodeProperties);
129-
long outSize = 0;
130-
for (int i = 0; i < 8; i++)
131-
{
132-
int v = inStream.ReadByte();
133-
if (v < 0)
134-
{
135-
Console.WriteLine("read outSize error.");
136-
return null;
137-
}
138-
139-
outSize |= (long)(byte)v << (8 * i);
140-
}
141-
142-
long compressedSize = inStream.Length - inStream.Position;
143-
decoder.Code(inStream, outStream, compressedSize, outSize, null);
144-
inStream.Close();
145-
return outStream;
146-
}
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14877
/// <summary>
14978
/// 整合函数：下载并解压，然后删去原压缩文件
15079
/// </summary>
151-
public static async Task DownloadAndDeCompressFileAsync(Uri uri, string localFilePath, string sha1Raw,
80+
public async Task DownloadAndDeCompressFileAsync(Uri uri, string localFilePath, string sha1Raw,
15281
string sha1Lzma, CancellationToken cancellationToken = default)
15382
{
15483
var stream = await DownloadFileAsync(uri, localFilePath + ".lzma", sha1Lzma, true,

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