Provide a facility for registering encoder services

src/Microsoft.AspNet.Http.Extensions/Encoders/EncoderOptions.cs

@@ -0,0 +1,21 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+
+namespace Microsoft.AspNet.WebUtilities.Encoders
+{
+    /// <summary>
+    /// Specifies options common to all three encoders (HtmlEncode, JavaScriptStringEncode, UrlEncode).
+    /// </summary>
+    public sealed class EncoderOptions
+    {
+        /// <summary>
+        /// Specifies code point tables which do not require escaping by the encoders.
+        /// </summary>
+        /// <remarks>
+        /// By default, only Basic Latin is allowed.
+        /// </remarks>
+        public ICodePointFilter[] CodePointFilters { get; set; } = new[] { Microsoft.AspNet.WebUtilities.Encoders.CodePointFilters.BasicLatin };
+    }
+}

src/Microsoft.AspNet.Http.Extensions/Encoders/EncoderServiceCollectionExtensions.cs

@@ -0,0 +1,25 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using Microsoft.AspNet.Http;
+using Microsoft.AspNet.WebUtilities.Encoders;
+using Microsoft.Framework.ConfigurationModel;
+
+namespace Microsoft.Framework.DependencyInjection
+{
+    public static class EncoderServiceCollectionExtensions
+    {
+        public static IServiceCollection AddEncoders([NotNull] this IServiceCollection services)
+        {
+            return AddEncoders(services, configuration: null);
+        }
+
+        public static IServiceCollection AddEncoders([NotNull] this IServiceCollection services, IConfiguration configuration)
+        {
+            services.AddOptions(configuration);
+            services.TryAdd(EncoderServices.GetDefaultServices(configuration));
+            return services;
+        }
+    }
+}

src/Microsoft.AspNet.Http.Extensions/Encoders/EncoderServices.cs

@@ -0,0 +1,39 @@
+// Copyright (c) Microsoft Open Technologies, Inc. All rights reserved.
+// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
+
+using System;
+using System.Collections.Generic;
+using Microsoft.Framework.ConfigurationModel;
+using Microsoft.Framework.DependencyInjection;
+using Microsoft.Framework.OptionsModel;
+
+namespace Microsoft.AspNet.WebUtilities.Encoders
+{
+    public static class EncoderServices
+    {
+        public static IEnumerable<IServiceDescriptor> GetDefaultServices()
+        {
+            return GetDefaultServices(configuration: null);
+        }
+
+        public static IEnumerable<IServiceDescriptor> GetDefaultServices(IConfiguration configuration)
+        {
+            var describe = new ServiceDescriber(configuration);
+
+            // Register the default encoders
+            // We want to call the 'Default' property getters lazily since they perform static caching
+            yield return describe.Singleton<IHtmlEncoder>(CreateFactory(() => HtmlEncoder.Default, filters => new HtmlEncoder(filters)));
+            yield return describe.Singleton<IJavaScriptStringEncoder>(CreateFactory(() => JavaScriptStringEncoder.Default, filters => new JavaScriptStringEncoder(filters)));
+            yield return describe.Singleton<IUrlEncoder>(CreateFactory(() => UrlEncoder.Default, filters => new UrlEncoder(filters)));
+        }
+
+        private static Func<IServiceProvider, T> CreateFactory<T>(Func<T> parameterlessCtor, Func<ICodePointFilter[], T> parameterfulCtor)
+        {
+            return serviceProvider =>
+            {
+                var codePointFilters = serviceProvider?.GetService<IOptions<EncoderOptions>>()?.Options?.CodePointFilters;
+                return (codePointFilters != null) ? parameterfulCtor(codePointFilters) : parameterlessCtor();
+            };
+        }
+    }
+}

src/Microsoft.AspNet.Http.Extensions/project.json

@@ -3,7 +3,9 @@
     "description": "ASP.NET 5 common extension methods for HTTP abstractions and IApplicationBuilder.",
     "dependencies": {
         "Microsoft.AspNet.Http": "1.0.0-*",
+        "Microsoft.AspNet.WebUtilities": "1.0.0-*",
         "Microsoft.Framework.DependencyInjection": "1.0.0-*",
+        "Microsoft.Framework.OptionsModel": "1.0.0-*",
         "Microsoft.Net.Http.Headers": "1.0.0-*"
     },
     "frameworks" : {