feat:支持解压Gzip Content-Encoding格式的数据包

AquaMai.Mods/GameSystem/MoreContentEncoding.cs

@@ -0,0 +1,92 @@
+using System.IO;
+using System.IO.Compression;
+using Net;
+using AquaMai.Config.Attributes;
+using HarmonyLib;
+
+namespace AquaMai.Mods.GameSystem;
+
+[ConfigSection(
+    name: "更多Content-Encoding格式",
+    en: """
+        Enables support for decompressing data encoded with formats other than deflate, such as gzip.
+        Useful when the server uses CDNs such as Cloudflare that do not support deflate.
+        """,
+    zh: """
+        开启后游戏将支持解压非deflate格式的数据包，比如Gzip;
+        用于服务器使用Cloudflare等不支持deflate格式的CDN;
+        """,
+    defaultOn: false)]
+
+public class MoreContentEncoding
+{
+    private const int BufferSize = 1024;  
+
+    [HarmonyPrefix]  
+    [HarmonyPatch(typeof(NetHttpClient), "Decompress")]  
+    public static bool PreDecompress(NetHttpClient __instance)  
+    {  
+        var traverse = Traverse.Create(__instance);  
+        var temporaryStream = traverse.Field<MemoryStream>("_temporaryStream").Value;  
+        var memoryStream = traverse.Field<MemoryStream>("_memoryStream").Value;  
+        var buffer = traverse.Field<byte[]>("_buffer").Value;  
+
+        memoryStream.SetLength(0L);  
+        if (temporaryStream.Length == 0L)  
+        {  
+            return false;  
+        }  
+
+        var raw = temporaryStream.ToArray();  
+
+        //  - 0x1F 0x8B            -> gzip
+        //  - 0x78 ?? + valid zlib -> zlib (the stock format: zlib header + raw deflate + adler32)
+        //  - otherwise            -> treat as plaintext
+        if (raw.Length >= 2 && raw[0] == 0x1F && raw[1] == 0x8B)  
+        {  
+            using var gz = new GZipStream(new MemoryStream(raw, writable: false), CompressionMode.Decompress);  
+            CopyTo(gz, memoryStream, buffer);  
+        }  
+        else if (raw.Length >= 6 && raw[0] == 0x78 && TryInflateZlib(raw, memoryStream, buffer))  
+        {  
+            // zlib 成功解压(
+        }  
+        else  
+        {  
+            memoryStream.Write(raw, 0, raw.Length);  
+        }  
+
+        memoryStream.Seek(0L, SeekOrigin.Begin);  
+        temporaryStream.Seek(0L, SeekOrigin.Begin);  
+        temporaryStream.SetLength(0L);  
+        return false;  
+    }  
+
+    private static bool TryInflateZlib(byte[] raw, MemoryStream output, byte[] buffer)  
+    {  
+        var startLength = output.Length;  
+        try  
+        {  
+            // 跳过 2 字节的 zlib 头部，忽略末尾的 4 字节 Adler32 校验和。
+            using var input = new MemoryStream(raw, 2, raw.Length - 6, writable: false);  
+            using var deflate = new DeflateStream(input, CompressionMode.Decompress);  
+            CopyTo(deflate, output, buffer);  
+            return true;  
+        }  
+        catch  
+        {   
+            output.SetLength(startLength);  
+            return false;  
+        }  
+    }  
+
+    private static void CopyTo(Stream from, Stream to, byte[] buffer)  
+    {  
+        while (true)  
+        {  
+            var count = from.Read(buffer, 0, BufferSize);  
+            if (count <= 0) break;  
+            to.Write(buffer, 0, count);  
+        }  
+    }
+}

AquaMai/configSort.yaml

@@ -146,6 +146,7 @@
   - Utils.ShowErrorLog
   - GameSettings.ForceAsServer
   - GameSystem.RemoveEncryption
+  - GameSystem.MoreContentEncoding
 
 社区功能:
   - GameSystem.VolumeSync