add init

MyCSharp.HttpUserAgentParser.sln

@@ -15,6 +15,8 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MyCSharp.HttpUserAgentParse
 EndProject
 Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "tests", "tests", "{F54C9296-4EF7-40F0-9F20-F23A2270ABC9}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "MyCSharp.HttpUserAgentParser.MemoryCache", "src\MyCSharp.HttpUserAgentParser.MemoryCache\MyCSharp.HttpUserAgentParser.MemoryCache.csproj", "{3C8CCD44-F47C-4624-8997-54C42F02E376}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -37,6 +39,10 @@ Global
 		{75960783-8BF9-479C-9ECF-E9653B74C9A2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{75960783-8BF9-479C-9ECF-E9653B74C9A2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{75960783-8BF9-479C-9ECF-E9653B74C9A2}.Release|Any CPU.Build.0 = Release|Any CPU
+		{3C8CCD44-F47C-4624-8997-54C42F02E376}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{3C8CCD44-F47C-4624-8997-54C42F02E376}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{3C8CCD44-F47C-4624-8997-54C42F02E376}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{3C8CCD44-F47C-4624-8997-54C42F02E376}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -46,6 +52,7 @@ Global
 		{3357BEC0-8216-409E-A539-F9A71DBACB81} = {008A2BAB-78B4-42EB-A5D4-DE434438CEF0}
 		{F16697F7-74B4-441D-A0C0-1A0572AC3AB0} = {F54C9296-4EF7-40F0-9F20-F23A2270ABC9}
 		{75960783-8BF9-479C-9ECF-E9653B74C9A2} = {F54C9296-4EF7-40F0-9F20-F23A2270ABC9}
+		{3C8CCD44-F47C-4624-8997-54C42F02E376} = {008A2BAB-78B4-42EB-A5D4-DE434438CEF0}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {E8B0C994-0BF2-4692-9E22-E48B265B2804}

src/MyCSharp.HttpUserAgentParser.MemoryCache/DependencyInjection/HttpUserAgentParserMemoryCacheServiceCollectionExtensions.cs

@@ -0,0 +1,26 @@
+using System;
+using Microsoft.Extensions.DependencyInjection;
+using MyCSharp.HttpUserAgentParser.DependencyInjection;
+using MyCSharp.HttpUserAgentParser.Providers;
+
+namespace MyCSharp.HttpUserAgentParser.MemoryCache.DependencyInjection
+{
+    public static class HttpUserAgentParserMemoryCacheServiceCollectionExtensions
+    {
+        /// <summary>
+        /// Registers <see cref="CachedHttpUserAgentParserProvider"/> as singleton to <see cref="IHttpUserAgentParserProvider"/>
+        /// </summary>
+        public static HttpUserAgentParserDependencyInjectionOptions AddMemoryCachedHttpUserAgentParser(
+            this IServiceCollection services, Action<HttpUserAgentParserMemoryCachedProviderOptions>? options = null)
+        {
+            HttpUserAgentParserMemoryCachedProviderOptions providerOptions = new();
+            options?.Invoke(providerOptions);
+
+            // register options
+            services.AddSingleton(providerOptions);
+
+            // register cache provider
+            return services.AddHttpUserAgentParser<HttpUserAgentParserMemoryCachedProvider>();
+        }
+    }
+}

src/MyCSharp.HttpUserAgentParser.MemoryCache/HttpUserAgentParserMemoryCachedProvider.cs

@@ -0,0 +1,30 @@
+using Microsoft.Extensions.Caching.Memory;
+using MyCSharp.HttpUserAgentParser.Providers;
+
+namespace MyCSharp.HttpUserAgentParser.MemoryCache
+{
+    public class HttpUserAgentParserMemoryCachedProvider : IHttpUserAgentParserProvider
+    {
+        private readonly IMemoryCache _memoryCache;
+        private readonly HttpUserAgentParserMemoryCachedProviderOptions _options;
+
+        public HttpUserAgentParserMemoryCachedProvider(IMemoryCache memoryCache, HttpUserAgentParserMemoryCachedProviderOptions options)
+        {
+            _memoryCache = memoryCache;
+            _options = options;
+        }
+
+        private static string Cleanup(string userAgent)
+            => userAgent.Trim();
+
+
+        public HttpUserAgentInformation Parse(string userAgent)
+        {
+            return _memoryCache.GetOrCreate(Cleanup(userAgent), entry =>
+            {
+                entry.SlidingExpiration = _options.CacheEntryOptions.SlidingExpiration;
+                return HttpUserAgentInformation.Parse(userAgent);
+            });
+        }
+    }
+}

src/MyCSharp.HttpUserAgentParser.MemoryCache/HttpUserAgentParserMemoryCachedProviderOptions.cs

@@ -0,0 +1,38 @@
+using System;
+using Microsoft.Extensions.Caching.Memory;
+
+namespace MyCSharp.HttpUserAgentParser.MemoryCache
+{
+    public class HttpUserAgentParserMemoryCachedProviderOptions
+    {
+        /// <summary>
+        /// Default of <seealso cref="MemoryCacheOptions.SizeLimit"/> is 256.
+        /// Default of <seealso cref="MemoryCacheEntryOptions.SlidingExpiration"/> is 1 day
+        /// </summary>
+        public MemoryCacheOptions CacheOptions { get; }
+        public MemoryCacheEntryOptions CacheEntryOptions { get; }
+
+        public HttpUserAgentParserMemoryCachedProviderOptions()
+            : this(null, null) { }
+
+        public HttpUserAgentParserMemoryCachedProviderOptions(MemoryCacheOptions cacheOptions)
+            : this(cacheOptions, null) { }
+
+
+        public HttpUserAgentParserMemoryCachedProviderOptions(MemoryCacheEntryOptions cacheEntryOptions)
+            : this(null, cacheEntryOptions) { }
+
+        public HttpUserAgentParserMemoryCachedProviderOptions(MemoryCacheOptions? cacheOptions = null, MemoryCacheEntryOptions? cacheEntryOptions = null)
+        {
+            CacheEntryOptions = cacheEntryOptions ?? new MemoryCacheEntryOptions
+            {
+                // defaults
+                SlidingExpiration = TimeSpan.FromDays(1)
+            };
+            CacheOptions = cacheOptions ?? new MemoryCacheOptions
+            {
+                SizeLimit = 256
+            };
+        }
+    }
+}

src/MyCSharp.HttpUserAgentParser.MemoryCache/MyCSharp.HttpUserAgentParser.MemoryCache.csproj

@@ -2,6 +2,16 @@
 
   <PropertyGroup>
     <TargetFramework>net5.0</TargetFramework>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
+  <ItemGroup>
+    <PackageReference Include="Microsoft.Extensions.Caching.Abstractions" Version="5.0.0" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\MyCSharp.HttpUserAgentParser.AspNetCore\MyCSharp.HttpUserAgentParser.AspNetCore.csproj" />
+    <ProjectReference Include="..\MyCSharp.HttpUserAgentParser\MyCSharp.HttpUserAgentParser.csproj" />
+  </ItemGroup>
+
 </Project>

src/MyCSharp.HttpUserAgentParser/Providers/DefaultHttpUserAgentParserProvider.cs

@@ -3,6 +3,6 @@
     public class DefaultHttpUserAgentParserProvider : IHttpUserAgentParserProvider
     {
         public HttpUserAgentInformation Parse(string userAgent)
-            => HttpUserAgentParser.Parse(userAgent);
+            => HttpUserAgentInformation.Parse(userAgent);
     }
 }