Newtonsoft package updates

src/Flurl.Http.Newtonsoft/ExtensionMethods.cs

@@ -13,7 +13,7 @@ namespace Flurl.Http.Newtonsoft
 	public static class ExtensionMethods
 	{
 		/// <summary>
-		/// Deserializes JSON-formatted HTTP response body to a dynamic object.
+		/// Deserializes a JSON-formatted HTTP response body to a dynamic object.
 		/// </summary>
 		/// <returns>A Task whose result is a dynamic object containing data in the response body.</returns>
 		public static async Task<dynamic> GetJsonAsync(this IFlurlResponse resp) {
@@ -22,7 +22,7 @@ public static async Task<dynamic> GetJsonAsync(this IFlurlResponse resp) {
 		}
 
 		/// <summary>
-		/// Deserializes JSON-formatted HTTP response body to a list of dynamic objects.
+		/// Deserializes a JSON-formatted HTTP response body to a list of dynamic objects.
 		/// </summary>
 		/// <returns>A Task whose result is a list of dynamic objects containing data in the response body.</returns>
 		public static async Task<IList<dynamic>> GetJsonListAsync(this IFlurlResponse resp) {
@@ -31,7 +31,7 @@ public static async Task<IList<dynamic>> GetJsonListAsync(this IFlurlResponse re
 		}
 
 		/// <summary>
-		/// Deserializes JSON-formatted HTTP response body to a dynamic object. Intended to chain off an async call.
+		/// Deserializes a JSON-formatted HTTP response body to a dynamic object. Intended to chain off an async call.
 		/// </summary>
 		/// <returns>A Task whose result is a dynamic object containing data in the response body.</returns>
 		public static async Task<dynamic> ReceiveJson(this Task<IFlurlResponse> response) {
@@ -41,7 +41,7 @@ public static async Task<dynamic> ReceiveJson(this Task<IFlurlResponse> response
 		}
 
 		/// <summary>
-		/// Deserializes JSON-formatted HTTP response body to a list of dynamic objects. Intended to chain off an async call.
+		/// Deserializes a JSON-formatted HTTP response body to a list of dynamic objects. Intended to chain off an async call.
 		/// </summary>
 		/// <returns>A Task whose result is a list of dynamic objects containing data in the response body.</returns>
 		public static async Task<IList<dynamic>> ReceiveJsonList(this Task<IFlurlResponse> response) {
@@ -50,6 +50,13 @@ public static async Task<IList<dynamic>> ReceiveJsonList(this Task<IFlurlRespons
 			return await resp.GetJsonListAsync().ConfigureAwait(false);
 		}
 
+		/// <summary>
+		/// Deserializes a JSON-formatted error response body to a dynamic object.
+		/// </summary>
+		/// <returns>A Task whose result is a dynamic object containing data in the response body.</returns>
+		public static async Task<dynamic> GetResponseJsonAsync(this FlurlHttpException flurlException) =>
+			(flurlException.Call?.Response == null) ? null : await flurlException.Call.Response.GetJsonAsync().ConfigureAwait(false);
+
 		/// <summary>
 		/// Shortcut to use NewtonsoftJsonSerializer with this IFlurlClientBuilder.
 		/// </summary>

src/Flurl.Http.Newtonsoft/Flurl.Http.Newtonsoft.csproj

@@ -4,7 +4,7 @@
     <LangVersion>9.0</LangVersion>
     <GeneratePackageOnBuild>True</GeneratePackageOnBuild>
     <PackageId>Flurl.Http.Newtonsoft</PackageId>
-    <Version>0.9.0-pre2</Version>
+    <Version>0.9.0-pre3</Version>
     <Authors>Todd Menier</Authors>
     <Description>A Newtonsoft-based JSON serializer for Flurl.Http 4.0 and above.</Description>
     <PackageProjectUrl>https://flurl.dev</PackageProjectUrl>
@@ -13,6 +13,7 @@
     <RepositoryType>git</RepositoryType>
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageTags>flurl http json</PackageTags>
+    <PackageReadmeFile>README.md</PackageReadmeFile>
     <PackageReleaseNotes>https://github.com/tmenier/Flurl/releases</PackageReleaseNotes>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
   </PropertyGroup>
@@ -26,6 +27,7 @@
 
   <ItemGroup>
     <None Include="..\..\icon.png" Pack="true" PackagePath="\" />
+    <None Include="README.md" Pack="true" PackagePath="\" />
     <PackageReference Include="Newtonsoft.Json" Version="13.0.1" />
     <ProjectReference Include="..\Flurl.Http\Flurl.Http.csproj" />
     <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.1.1" PrivateAssets="All" />

src/Flurl.Http.Newtonsoft/README.md

@@ -0,0 +1,21 @@
+# Flurl.Http.Newtonsoft
+
+[![NuGet version (Flurl.Http.Newtonsoft)](https://img.shields.io/nuget/v/Flurl.Http.Newtonsoft.svg?style=flat-square)](https://www.nuget.org/packages/Flurl.Http.Newtonsoft/)
+
+Flurl.Http 4.0 [removed](https://github.com/tmenier/Flurl/issues/517) the `Newtonsoft.Json` dependency in favor of `System.Text.Json` for its default JSON serializer implementation. This has several advantages, most notably that it dramatically reduces Flurl's footprint, which is especially important to developers using it in mobile apps and browser platforms.
+
+But it's also a breaking change. Upgrading from 3.x may cause some pains, such as:
+
+- Newtonsoft's [serialization attributes](https://www.newtonsoft.com/json/help/html/serializationattributes.htm) no longer have any effect, and need be replaced by their STJ equivalents.
+- Newtonsoft's [configuration settings](https://www.newtonsoft.com/json/help/html/serializationsettings.htm) also no longer have any effect in Flurl.
+- Support for `dynamic`s has also been [removed](https://github.com/tmenier/Flurl/issues/699) in Flurl, specifically due to the lack of support in STJ.
+
+This package aims to solve these problems, making upgrading easier for those who still want or need Newtonsoft-based serialization. Included in this package:
+
+- `NewtonsoftJsonSearializer`, an instance of which can be assigned to a Flurl client or request via `Settings.JsonSerializer`.
+- Shortcuts for enabling the serializer more "globally":
+    - When using the clientless pattern: `FlurlHttp.Clients.UseNewtonsoft()`
+    - When using DI / [named clients](https://github.com/tmenier/Flurl/issues/770): `new FlurlClientCache().UseNewtonsoft()`
+- Non-generic `dynamic`-returning `GetJson`, `GetJsonList`, `ReceiveJson`, and `ReceiveJsonList` extension methods.
+
+Both `NewtonsoftJsonSerializer` and the `UseNewtonsoft` shortcuts take an optional `JsonSerializerSettings` parameter. In fact, the serializer was lifted directly from 3.x, so you can trust that it's battle-tested and highly performant.

test/Flurl.Test/Http/NewtonsoftTests.cs

@@ -1,11 +1,13 @@
 using System;
+using System.Net.Http;
 using NUnit.Framework;
 using Flurl.Http;
 using Flurl.Http.Newtonsoft;
 using Flurl.Http.Testing;
 using System.Threading.Tasks;
 using Flurl.Http.Configuration;
 using Newtonsoft.Json;
+using NUnit.Framework.Constraints;
 
 namespace Flurl.Test.Http
 {
@@ -55,6 +57,32 @@ public async Task null_response_returns_null_dynamic() {
 
 			var list = await resp.ReceiveJsonList();
 			Assert.IsNull(list);
+
+			var ex = new FlurlHttpException(new FlurlCall {
+				Request = new FlurlRequest(),
+				HttpRequestMessage = new HttpRequestMessage(),
+				Response = null,
+			});
+			var err = await ex.GetResponseJsonAsync();
+			Assert.IsNull(err);
+		}
+
+		[TestCase(false)]
+		[TestCase(true)]
+		public async Task can_get_error_json_untyped(bool useShortcut) {
+			HttpTest.RespondWithJson(new { code = 999, message = "our server crashed" }, 500);
+
+			try {
+				await "http://api.com".GetStringAsync();
+			}
+			catch (FlurlHttpException ex) {
+				var error = useShortcut ? // error is a dynamic this time
+					await ex.GetResponseJsonAsync() :
+					await ex.Call.Response.GetJsonAsync();
+				Assert.IsNotNull(error);
+				Assert.AreEqual(999, error.code);
+				Assert.AreEqual("our server crashed", error.message);
+			}
 		}
 	}