Obey HttpJsonOptions

Carter.sln.DotSettings

@@ -47,11 +47,14 @@
 	<s:Boolean x:Key="/Default/CodeStyle/CSharpUsing/AddImportsToDeepestScope/@EntryValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/CodeStyle/CSharpUsing/QualifiedUsingAtNestedScope/@EntryValue">True</s:Boolean>
 	<s:String x:Key="/Default/CodeStyle/FileHeader/FileHeaderRegionName/@EntryValue"></s:String>
-	<s:String x:Key="/Default/CodeStyle/FileHeader/FileHeaderText/@EntryValue"></s:String>
+
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=MethodPropertyEvent/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="AaBb"&gt;&lt;ExtraRule Prefix="" Suffix="" Style="Aa_bb" /&gt;&lt;/Policy&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PrivateInstanceFields/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aaBb" /&gt;</s:String>
 	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/PredefinedNamingRules/=PrivateStaticFields/@EntryIndexedValue">&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aaBb" /&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/UserRules/=4a98fdf6_002D7d98_002D4f5a_002Dafeb_002Dea44ad98c70c/@EntryIndexedValue">&lt;Policy&gt;&lt;Descriptor Staticness="Instance" AccessRightKinds="Private" Description="Instance fields (private)"&gt;&lt;ElementKinds&gt;&lt;Kind Name="FIELD" /&gt;&lt;Kind Name="READONLY_FIELD" /&gt;&lt;/ElementKinds&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aaBb" /&gt;&lt;/Policy&gt;</s:String>
+	<s:String x:Key="/Default/CodeStyle/Naming/CSharpNaming/UserRules/=f9fce829_002De6f4_002D4cb2_002D80f1_002D5497c44f51df/@EntryIndexedValue">&lt;Policy&gt;&lt;Descriptor Staticness="Static" AccessRightKinds="Private" Description="Static fields (private)"&gt;&lt;ElementKinds&gt;&lt;Kind Name="FIELD" /&gt;&lt;/ElementKinds&gt;&lt;/Descriptor&gt;&lt;Policy Inspect="True" Prefix="" Suffix="" Style="aaBb" /&gt;&lt;/Policy&gt;</s:String>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EdotCover_002EIde_002ECore_002EFilterManagement_002EModel_002ESolutionFilterSettingsManagerMigrateSettings/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EFeature_002EServices_002ECodeCleanup_002EFileHeader_002EFileHeaderSettingsMigrate/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpAttributeForSingleLineMethodUpgrade/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpKeepExistingMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ECSharpPlaceEmbeddedOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
@@ -61,6 +64,7 @@
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002ECSharpPlaceAttributeOnSameLineMigration/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateBlankLinesAroundFieldToBlankLinesAroundProperty/@EntryIndexedValue">True</s:Boolean>
 	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EMigrateThisQualifierSettings/@EntryIndexedValue">True</s:Boolean>
+	<s:Boolean x:Key="/Default/Environment/SettingsMigration/IsMigratorApplied/=JetBrains_002EReSharper_002EPsi_002ECSharp_002ECodeStyle_002ESettingsUpgrade_002EPredefinedNamingRulesToUserRulesUpgrade/@EntryIndexedValue">True</s:Boolean>
 	<s:String x:Key="/Default/FilterSettingsManager/CoverageFilterXml/@EntryValue">&lt;data&gt;&lt;IncludeFilters /&gt;&lt;ExcludeFilters /&gt;&lt;/data&gt;</s:String>
 	<s:String x:Key="/Default/FilterSettingsManager/AttributeFilterXml/@EntryValue">&lt;data /&gt;</s:String>
 	<s:Int64 x:Key="/Default/CodeStyle/Naming/CSharpAutoNaming/AutoNamingCompletedVersion/@EntryValue">2</s:Int64>

src/Carter/Response/DefaultJsonResponseNegotiator.cs

@@ -6,15 +6,21 @@
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Http;
+using Microsoft.AspNetCore.Http.Json;
+using Microsoft.Extensions.Options;
 using Microsoft.Net.Http.Headers;
 
 public class DefaultJsonResponseNegotiator : IResponseNegotiator
 {
     private readonly JsonSerializerOptions jsonSettings;
 
-    public DefaultJsonResponseNegotiator()
+    public DefaultJsonResponseNegotiator(IOptions<JsonOptions> options = default)
     {
-        this.jsonSettings = new JsonSerializerOptions { DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull, PropertyNamingPolicy = JsonNamingPolicy.CamelCase };
+        this.jsonSettings = options?.Value.SerializerOptions ?? new JsonSerializerOptions
+        {
+            DefaultIgnoreCondition = JsonIgnoreCondition.WhenWritingNull,
+            PropertyNamingPolicy = JsonNamingPolicy.CamelCase
+        };
     }
 
     public bool CanHandle(MediaTypeHeaderValue accept)

test/Carter.Tests/ContentNegotiation/HttpJsonOptionsResponseNegotiatorTests.cs

@@ -0,0 +1,47 @@
+namespace Carter.Tests.ContentNegotiation
+{
+    using System.Net.Http;
+    using System.Text.Json;
+    using System.Threading.Tasks;
+    using Microsoft.AspNetCore.Builder;
+    using Microsoft.AspNetCore.Hosting;
+    using Microsoft.AspNetCore.TestHost;
+    using Microsoft.Extensions.DependencyInjection;
+    using Xunit;
+
+    public class HttpJsonOptionsResponseNegotiatorTests
+    {
+        public HttpJsonOptionsResponseNegotiatorTests()
+        {
+            var server = new TestServer(
+                new WebHostBuilder()
+                    .ConfigureServices(x =>
+                    {
+                        x.ConfigureHttpJsonOptions(jsonOptions =>
+                        {
+                            jsonOptions.SerializerOptions.PropertyNamingPolicy = JsonNamingPolicy.KebabCaseUpper;
+                        });
+                        x.AddRouting();
+                        x.AddCarter(configurator: c =>
+                            c.WithModule<NegotiatorModule>());
+                    })
+                    .Configure(x =>
+                    {
+                        x.UseRouting();
+                        x.UseEndpoints(builder => builder.MapCarter());
+                    })
+            );
+            this.httpClient = server.CreateClient();
+        }
+
+        private readonly HttpClient httpClient;
+
+        [Fact]
+        public async Task Should_obey_httpjsonoptions()
+        {
+            var response = await this.httpClient.GetAsync("/negotiate");
+            var body = await response.Content.ReadAsStringAsync();
+            Assert.Equal("{\"FIRST-NAME\":\"Jim\"}", body);
+        }
+    }
+}