Merge pull request #401 from ArgoZhang/dev-net

fix(NET): refactor GetData method

binding/csharp/CHANGELOG.md

@@ -2,7 +2,10 @@
 
 All notable changes to this project will be documented in this file.
 
-## [Unreleased]
+## [3.0.0] - 2025-11-22
+- 支持 .NET 10.0
+- 增加 IPv6 支持
+- 修复若干 bug
 
 ## [2.0.1] - 2023-07-30
 

binding/csharp/IP2Region.Net.BenchMark/Benmarks.cs

@@ -10,6 +10,7 @@ using IP2Region.Net.XDB;
 
 namespace IP2Region.Net.BenchMark;
 
+[MemoryDiagnoser]
 public class Benchmarks
 {
     private static readonly string XdbPathV4 = Path.Combine(AppContext.BaseDirectory, "IP2Region", "ip2region_v4.xdb");
@@ -24,6 +25,17 @@ public class Benchmarks
     private readonly string _testIPv4Address = "114.114.114.114";
     private readonly string _testIPv6Address = "240e:3b7:3272:d8d0:db09:c067:8d59:539e";
 
+    public Benchmarks()
+    {
+        _contentV4Searcher.Search(_testIPv4Address);
+        _vectorV4Searcher.Search(_testIPv4Address);
+        _fileV4Searcher.Search(_testIPv4Address);
+
+        _contentV6Searcher.Search(_testIPv6Address);
+        _vectorV6Searcher.Search(_testIPv6Address);
+        _fileV6Searcher.Search(_testIPv6Address);
+    }
+
     [Benchmark]
     [BenchmarkCategory("IPv4")]
     public void ContentIPv4() => _contentV4Searcher.Search(_testIPv4Address);

binding/csharp/IP2Region.Net.Test/SearcherTest.cs

@@ -78,6 +78,8 @@ public class SearcherTest
 
         searcher.Search("58.251.27.201");
         Assert.Equal(3, searcher.IoCount);
+
+        searcher.Dispose();
     }
 
     [Fact]
@@ -89,6 +91,8 @@ public class SearcherTest
 
         searcher.Search("58.251.27.201");
         Assert.Equal(2, searcher.IoCount);
+
+        searcher.Dispose();
     }
 
     [Fact]
@@ -100,6 +104,8 @@ public class SearcherTest
 
         searcher.Search("58.251.27.201");
         Assert.Equal(0, searcher.IoCount);
+
+        searcher.Dispose();
     }
 
     [Theory]
@@ -110,10 +116,6 @@ public class SearcherTest
         var ipAddress = IPAddress.Parse(ipStr);
         var region = fileSearcher.Search(ipAddress);
         Assert.Equal(expected, region);
-
-        var ip = XDB.Util.IpAddressToUInt32(ipAddress);
-        region = fileSearcher.Search(ip);
-        Assert.Equal(expected, region);
     }
 
     [Theory]

binding/csharp/IP2Region.Net/Abstractions/ISearcher.cs

@@ -12,7 +12,7 @@ namespace IP2Region.Net.Abstractions;
 /// <summary>
 /// IP 转化为地理位置搜索器接口
 /// </summary>
-public interface ISearcher
+public interface ISearcher : IDisposable
 {
     /// <summary>
     /// 搜索方法
@@ -30,6 +30,7 @@ public interface ISearcher
     /// 搜索方法 仅限 IPv4 使用
     /// </summary>
     /// <param name="ipAddress">IPv4 地址字节数组小端读取 uint 数值</param>
+    [Obsolete("已弃用，请改用其他方法；Deprecated; please use Search(string) or Search(IPAddress) method.")]
     string? Search(uint ipAddress);
 
     /// <summary>

binding/csharp/IP2Region.Net/IP2Region.Net.csproj

@@ -2,9 +2,9 @@
 
     <PropertyGroup>
         <id>IP2Region.Net</id>
-        <version>2.1.1</version>
+        <version>3.0.0</version>
         <title>IP2Region.Net</title>
-        <authors>Alan Lee</authors>
+        <authors>Alan Lee;Argo Zhang(argo@live.ca)</authors>
         <PackageLicenseExpression>Apache-2.0</PackageLicenseExpression>
         <PackageReadmeFile>README.md</PackageReadmeFile>
         <PackageProjectUrl>https://github.com/lionsoul2014/ip2region/tree/master/binding/csharp</PackageProjectUrl>

binding/csharp/IP2Region.Net/Internal/Abstractions/AbstractCacheStrategy.cs

@@ -1,54 +0,0 @@
-// Copyright 2025 The Ip2Region Authors. All rights reserved.
-// Use of this source code is governed by a Apache2.0-style
-// license that can be found in the LICENSE file.
-// @Author Alan <lzh.shap@gmail.com>
-// @Date   2023/07/25
-// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
-
-using System.Buffers;
-
-namespace IP2Region.Net.Internal.Abstractions;
-
-internal abstract class AbstractCacheStrategy(string xdbPath)
-{
-    protected const int HeaderInfoLength = 256;
-    protected const int VectorIndexSize = 8;
-
-    private const int BufferSize = 64 * 1024;
-
-    public int IoCount { get; private set; }
-
-    protected FileStream XdbFileStream = new(xdbPath, FileMode.Open, FileAccess.Read, FileShare.Read, BufferSize, FileOptions.RandomAccess);
-
-    public void ResetIoCount()
-    {
-        IoCount = 0;
-    }
-
-    public virtual ReadOnlyMemory<byte> GetVectorIndex(int offset) => GetData(HeaderInfoLength + offset, VectorIndexSize);
-
-    public virtual ReadOnlyMemory<byte> GetData(long offset, int length)
-    {
-        byte[] buffer = ArrayPool<byte>.Shared.Rent(length);
-        int totalBytesRead = 0;
-        try
-        {
-            XdbFileStream.Seek(offset, SeekOrigin.Begin);
-
-            int bytesRead;
-            while (totalBytesRead < length)
-            {
-                bytesRead = XdbFileStream.Read(buffer, totalBytesRead, length);
-                totalBytesRead += bytesRead;
-
-                IoCount++;
-            }
-        }
-        finally
-        {
-            ArrayPool<byte>.Shared.Return(buffer);
-        }
-
-        return new ReadOnlyMemory<byte>(buffer, 0, totalBytesRead);
-    }
-}

binding/csharp/IP2Region.Net/Internal/CacheStrategyFactory.cs

@@ -5,14 +5,13 @@
 // @Date   2023/07/25
 // Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
-using IP2Region.Net.Internal.Abstractions;
 using IP2Region.Net.XDB;
 
 namespace IP2Region.Net.Internal;
 
-class CacheStrategyFactory(string xdbPath)
+static class CacheStrategyFactory
 {
-    public AbstractCacheStrategy CreateCacheStrategy(CachePolicy cachePolicy) => cachePolicy switch
+    public static ICacheStrategy CreateCacheStrategy(CachePolicy cachePolicy, string xdbPath) => cachePolicy switch
     {
         CachePolicy.Content => new ContentCacheStrategy(xdbPath),
         CachePolicy.VectorIndex => new VectorIndexCacheStrategy(xdbPath),

binding/csharp/IP2Region.Net/Internal/ContentCacheStrategy.cs

@@ -5,11 +5,9 @@
 // @Date   2023/07/25
 // Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
-using IP2Region.Net.Internal.Abstractions;
-
 namespace IP2Region.Net.Internal;
 
-class ContentCacheStrategy : AbstractCacheStrategy
+class ContentCacheStrategy : FileCacheStrategy
 {
     private readonly ReadOnlyMemory<byte> _cacheData;
 
@@ -20,5 +18,10 @@ class ContentCacheStrategy : AbstractCacheStrategy
         XdbFileStream.Dispose();
     }
 
-    public override ReadOnlyMemory<byte> GetData(long offset = 0, int length = 0) => _cacheData.Slice((int)offset, length);
+    public override ReadOnlyMemory<byte> GetData(long offset, int length) => _cacheData.Slice((int)offset, length);
+
+    protected override void Dispose(bool disposing)
+    {
+        base.Dispose(false);
+    }
 }

binding/csharp/IP2Region.Net/Internal/FileCacheStrategy.cs

@@ -5,11 +5,81 @@
 // @Date   2023/07/25
 // Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
-using IP2Region.Net.Internal.Abstractions;
+using System.Buffers;
 
 namespace IP2Region.Net.Internal;
 
-class FileCacheStrategy(string xdbPath) : AbstractCacheStrategy(xdbPath)
+class FileCacheStrategy(string xdbPath) : ICacheStrategy
 {
+    protected const int HeaderInfoLength = 256;
+    protected const int VectorIndexSize = 8;
 
+    protected const int BufferSize = 64 * 1024;
+
+    protected FileStream XdbFileStream = new(xdbPath, FileMode.Open, FileAccess.Read, FileShare.Read, BufferSize, FileOptions.RandomAccess);
+
+    public int IoCount { get; set; }
+
+    public void ResetIoCount()
+    {
+        IoCount = 0;
+    }
+
+    public virtual ReadOnlyMemory<byte> GetVectorIndex(int offset) => GetData(HeaderInfoLength + offset, VectorIndexSize);
+
+    public virtual ReadOnlyMemory<byte> GetData(long offset, int length)
+    {
+        var buffer = ArrayPool<byte>.Shared.Rent(length);
+        try
+        {
+            int totalBytesRead = 0;
+            XdbFileStream.Seek(offset, SeekOrigin.Begin);
+
+            int bytesRead;
+            while (totalBytesRead < length)
+            {
+                bytesRead = XdbFileStream.Read(buffer, totalBytesRead, length - totalBytesRead);
+                if (bytesRead == 0)
+                {
+                    break;
+                }
+
+                totalBytesRead += bytesRead;
+                IoCount++;
+            }
+
+            var ret = new byte[totalBytesRead];
+            if (totalBytesRead > 0)
+            {
+                Array.Copy(buffer, 0, ret, 0, totalBytesRead);
+            }
+            return ret;
+        }
+        finally
+        {
+            ArrayPool<byte>.Shared.Return(buffer);
+        }
+    }
+
+    /// <summary>
+    /// 释放文件句柄
+    /// </summary>
+    /// <param name="disposing"></param>
+    protected virtual void Dispose(bool disposing)
+    {
+        if (disposing)
+        {
+            XdbFileStream.Close();
+            XdbFileStream.Dispose();
+        }
+    }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    public void Dispose()
+    {
+        Dispose(true);
+        GC.SuppressFinalize(this);
+    }
 }

binding/csharp/IP2Region.Net/Internal/ICacheStrategy.cs

@@ -0,0 +1,19 @@
+// Copyright 2025 The Ip2Region Authors. All rights reserved.
+// Use of this source code is governed by a Apache2.0-style
+// license that can be found in the LICENSE file.
+// @Author Alan <lzh.shap@gmail.com>
+// @Date   2023/07/25
+// Updated by Argo Zhang <argo@live.ca> at 2025/11/21
+
+namespace IP2Region.Net.Internal;
+
+internal interface ICacheStrategy : IDisposable
+{
+    int IoCount { get; }
+
+    void ResetIoCount();
+
+    ReadOnlyMemory<byte> GetVectorIndex(int offset);
+
+    ReadOnlyMemory<byte> GetData(long offset, int length);
+}

binding/csharp/IP2Region.Net/Internal/VectorIndexCacheStrategy.cs

@@ -5,11 +5,9 @@
 // @Date   2023/07/25
 // Updated by Argo Zhang <argo@live.ca> at 2025/11/21
 
-using IP2Region.Net.Internal.Abstractions;
-
 namespace IP2Region.Net.Internal;
 
-class VectorIndexCacheStrategy : AbstractCacheStrategy
+class VectorIndexCacheStrategy : FileCacheStrategy
 {
     private const int VectorIndexRows = 256;
     private const int VectorIndexCols = 256;
@@ -18,10 +16,7 @@ class VectorIndexCacheStrategy : AbstractCacheStrategy
 
     public VectorIndexCacheStrategy(string xdbPath) : base(xdbPath)
     {
-        XdbFileStream.Seek(HeaderInfoLength, SeekOrigin.Begin);
+        _vectorCache = GetData(HeaderInfoLength, VectorIndexRows * VectorIndexCols * VectorIndexSize);
-        var buffer = new byte[VectorIndexRows * VectorIndexCols * VectorIndexSize];
-        var length = XdbFileStream.Read(buffer, 0, buffer.Length);
-        _vectorCache = new ReadOnlyMemory<byte>(buffer);
     }
 
     public override ReadOnlyMemory<byte> GetVectorIndex(int offset) => _vectorCache.Slice(offset, VectorIndexSize);

binding/csharp/IP2Region.Net/XDB/Searcher.cs

@@ -7,8 +7,8 @@
 
 using IP2Region.Net.Abstractions;
 using IP2Region.Net.Internal;
-using IP2Region.Net.Internal.Abstractions;
 using System.Buffers.Binary;
+using System.Diagnostics.CodeAnalysis;
 using System.Net;
 using System.Text;
 
@@ -17,24 +17,18 @@ namespace IP2Region.Net.XDB;
 /// <summary>
 /// <see cref="ISearcher"/> 实现类
 /// </summary>
-public class Searcher : ISearcher
+/// <remarks>
+/// <inheritdoc/>
+/// </remarks>
+public class Searcher(CachePolicy cachePolicy, string xdbPath) : ISearcher
 {
-    private readonly AbstractCacheStrategy _cacheStrategy;
+    private readonly ICacheStrategy _cacheStrategy = CacheStrategyFactory.CreateCacheStrategy(cachePolicy, xdbPath);
 
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
     public int IoCount => _cacheStrategy.IoCount;
 
-    /// <summary>
-    /// <inheritdoc/>
-    /// </summary>
-    public Searcher(CachePolicy cachePolicy, string dbPath)
-    {
-        var factory = new CacheStrategyFactory(dbPath);
-        _cacheStrategy = factory.CreateCacheStrategy(cachePolicy);
-    }
-
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
@@ -47,14 +41,13 @@ public class Searcher : ISearcher
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
-    public string? Search(IPAddress ipAddress)
+    public string? Search(IPAddress ipAddress) => SearchCore(ipAddress.GetAddressBytes());
-    {
-        return SearchCore(ipAddress.GetAddressBytes());
-    }
 
     /// <summary>
     /// <inheritdoc/>
     /// </summary>
+    [Obsolete("已弃用，请改用其他方法；Deprecated; please use Search(string) or Search(IPAddress) method.")]
+    [ExcludeFromCodeCoverage]
     public string? Search(uint ipAddress)
     {
         var bytes = BitConverter.GetBytes(ipAddress);
@@ -93,7 +86,7 @@ public class Searcher : ISearcher
         {
             int m = (int)(l + h) >> 1;
 
-            var p = (int)sPtr + m * indexSize;
+            var p = sPtr + m * indexSize;
             var buff = _cacheStrategy.GetData(p, indexSize);
 
             var s = buff.Span.Slice(0, length);
@@ -114,7 +107,7 @@ public class Searcher : ISearcher
             }
         }
 
-        var regionBuff = _cacheStrategy.GetData((int)dataPtr, dataLen);
+        var regionBuff = _cacheStrategy.GetData(dataPtr, dataLen);
         return Encoding.UTF8.GetString(regionBuff.Span.ToArray());
     }
 
@@ -154,4 +147,13 @@ public class Searcher : ISearcher
         }
         return ret;
     }
+
+    /// <summary>
+    /// <inheritdoc/>
+    /// </summary>
+    public void Dispose()
+    {
+        _cacheStrategy.Dispose();
+        GC.SuppressFinalize(this);
+    }
 }

binding/csharp/README.md

@@ -24,6 +24,7 @@ ISearcher searcher = new Searcher(CachePolicy , "your xdb file path");
 | CachePolicy.Content     | Cache the entire `xdb` data.                                                                               | Yes         |
 | CachePolicy.VectorIndex | Cache `vecotorIndex` to speed up queries and reduce system io pressure by reducing one fixed IO operation. | Yes         |
 | CachePolicy.File        | Completely file-based queries                                                                              | Yes         |
+
 ### XDB File Description
 Generate using [maker](https://github.com/lionsoul2014/ip2region/tree/master/maker/csharp), or [download](https://github.com/lionsoul2014/ip2region/blob/master/data/ip2region.xdb) pre-generated xdb files
 
@@ -47,15 +48,47 @@ provider.GetRequiredKeyedService<ISearcher>("IP2Region.Net");
 netstandard2.0;netstandard2.1;net6.0;net7.0;net8.0;net9.0;net10.0
 
 ## Performance
+// * Summary *
 
-| Method      | Mean        | Error     | StdDev      | Median      |
+BenchmarkDotNet v0.15.6, Windows 11 (10.0.26200.7171)
-|------------ |------------:|----------:|------------:|------------:|
+13th Gen Intel Core i7-13700 2.10GHz, 1 CPU, 24 logical and 16 physical cores
-| ContentIPv4 |    101.5 ns |   2.04 ns |     4.57 ns |    103.1 ns |
+.NET SDK 10.0.100
-| VectorIPv4  |  7,488.1 ns | 222.91 ns |   657.26 ns |  7,819.2 ns |
+  [Host]     : .NET 10.0.0 (10.0.0, 10.0.25.52411), X64 RyuJIT x86-64-v3
-| FileIPv4    | 11,686.9 ns |  59.81 ns |    55.95 ns | 11,707.6 ns |
+  DefaultJob : .NET 10.0.0 (10.0.0, 10.0.25.52411), X64 RyuJIT x86-64-v3
-| ContentIPv6 |    296.1 ns |   1.84 ns |     1.72 ns |    296.2 ns |
+
-| VectorIPv6  | 15,025.1 ns | 938.17 ns | 2,766.21 ns | 16,642.9 ns |
+
-| FileIPv6    | 19,721.0 ns | 807.55 ns | 2,381.08 ns | 20,905.7 ns |
+| Method      | Mean         | Error      | StdDev     | Gen0   | Allocated |
+|------------ |-------------:|-----------:|-----------:|-------:|----------:|
+| ContentIPv4 |     53.70 ns |   0.296 ns |   0.277 ns | 0.0086 |     136 B |
+| VectorIPv4  |  4,446.04 ns |  18.673 ns |  15.593 ns | 0.0076 |     232 B |
+| FileIPv4    |  6,712.40 ns |  15.718 ns |  13.934 ns | 0.0153 |     264 B |
+| ContentIPv6 |    145.53 ns |   0.331 ns |   0.277 ns | 0.0126 |     200 B |
+| VectorIPv6  |  7,058.39 ns | 125.505 ns | 117.398 ns | 0.0381 |     712 B |
+| FileIPv6    | 10,657.97 ns |  53.907 ns |  50.425 ns | 0.0458 |     744 B |
+
+// * Hints *
+Outliers
+  Benchmarks.VectorIPv4: Default  -> 2 outliers were removed (4.55 us, 4.58 us)
+  Benchmarks.FileIPv4: Default    -> 1 outlier  was  removed (6.79 us)
+  Benchmarks.ContentIPv6: Default -> 2 outliers were removed (148.08 ns, 152.27 ns)
+
+// * Legends *
+  Mean      : Arithmetic mean of all measurements
+  Error     : Half of 99.9% confidence interval
+  StdDev    : Standard deviation of all measurements
+  Gen0      : GC Generation 0 collects per 1000 operations
+  Allocated : Allocated memory per single operation (managed only, inclusive, 1KB = 1024B)
+  1 ns      : 1 Nanosecond (0.000000001 sec)
+
+// * Diagnostic Output - MemoryDiagnoser *
+
+
+// ***** BenchmarkRunner: End *****
+Run time: 00:02:06 (126.09 sec), executed benchmarks: 6
+
+Global total time: 00:02:13 (133.47 sec), executed benchmarks: 6
+// * Artifacts cleanup *
+Artifacts cleanup is finished
 
 ## Contributing
 Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.