Dispose HttpResponseMessage and HttpContent in HTTP client proxy

framework/src/Volo.Abp.Http.Client/Volo/Abp/Http/Client/ClientProxying/ClientProxyBase.cs

@@ -50,7 +50,9 @@ public class ClientProxyBase<TService> : ITransientDependency
 
     protected virtual async Task RequestAsync(string methodName, ClientProxyRequestTypeValue? arguments = null)
     {
-        await RequestAsync(BuildHttpProxyClientProxyContext(methodName, arguments));
+        using (await RequestAsync(BuildHttpProxyClientProxyContext(methodName, arguments)))
+        {
+        }
     }
 
     protected virtual async Task<T> RequestAsync<T>(string methodName, ClientProxyRequestTypeValue? arguments = null)
@@ -120,18 +122,21 @@ await responseContent.ReadAsStreamAsync(),
                 responseContent.Headers?.ContentLength);
         }
 
-        var stringContent = await responseContent.ReadAsStringAsync();
-        if (typeof(T) == typeof(string))
+        using (responseContent)
         {
-            return (T)(object)stringContent;
-        }
+            var stringContent = await responseContent.ReadAsStringAsync();
+            if (typeof(T) == typeof(string))
+            {
+                return (T)(object)stringContent;
+            }
 
-        if (stringContent.IsNullOrWhiteSpace())
-        {
-            return default!;
-        }
+            if (stringContent.IsNullOrWhiteSpace())
+            {
+                return default!;
+            }
 
-        return JsonSerializer.Deserialize<T>(stringContent);
+            return JsonSerializer.Deserialize<T>(stringContent);
+        }
     }
 
     protected virtual async Task<HttpContent> RequestAsync(ClientProxyRequestContext requestContext)
@@ -184,7 +189,15 @@ await ClientAuthenticator.Authenticate(
 
         if (!response.IsSuccessStatusCode)
         {
-            await ThrowExceptionForResponseAsync(response);
+            try
+            {
+                await ThrowExceptionForResponseAsync(response);
+            }
+            catch
+            {
+                response.Dispose();
+                throw;
+            }
         }
 
         return response.Content;

framework/src/Volo.Abp.Http.Client/Volo/Abp/Http/Client/DynamicProxying/DynamicHttpProxyInterceptor.cs

@@ -59,7 +59,9 @@ await GetActionApiDescriptionModel(invocation),
 
         if (invocation.Method.ReturnType.GenericTypeArguments.IsNullOrEmpty())
         {
-            await InterceptorClientProxy.CallRequestAsync(context);
+            using (await InterceptorClientProxy.CallRequestAsync(context))
+            {
+            }
         }
         else
         {

framework/test/Volo.Abp.Http.Client.Tests/Volo/Abp/Http/DynamicProxying/ClientProxyResponseDisposal_Tests.cs

@@ -0,0 +1,157 @@
+using System;
+using System.IO;
+using System.Net;
+using System.Net.Http;
+using System.Text;
+using System.Threading;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Shouldly;
+using Volo.Abp.AspNetCore.TestBase;
+using Volo.Abp.Http.Client;
+using Volo.Abp.Http.Client.Proxying;
+using Xunit;
+
+namespace Volo.Abp.Http.DynamicProxying;
+
+public class ClientProxyResponseDisposal_Tests : AbpHttpClientTestBase
+{
+    private readonly IRegularTestController _controller;
+    private readonly StubProxyHttpClientFactory _factory;
+
+    public ClientProxyResponseDisposal_Tests()
+    {
+        _controller = ServiceProvider.GetRequiredService<IRegularTestController>();
+        _factory = (StubProxyHttpClientFactory)ServiceProvider.GetRequiredService<IProxyHttpClientFactory>();
+    }
+
+    protected override void ConfigureServices(IServiceCollection services)
+    {
+        services.Replace(ServiceDescriptor.Singleton<IProxyHttpClientFactory, StubProxyHttpClientFactory>());
+    }
+
+    [Fact]
+    public async Task Non_Abp_Error_Response_Should_Dispose_HttpContent()
+    {
+        var content = new TrackingHttpContent("Bad Gateway from upstream");
+        _factory.SetStubResponse(() => new HttpResponseMessage(HttpStatusCode.BadGateway)
+        {
+            Content = content
+        });
+
+        var exception = await Assert.ThrowsAsync<AbpRemoteCallException>(
+            () => _controller.IncrementValueAsync(1));
+
+        exception.HttpStatusCode.ShouldBe((int)HttpStatusCode.BadGateway);
+        content.Disposed.ShouldBeTrue();
+    }
+
+    [Fact]
+    public async Task Successful_Response_With_Json_Return_Should_Dispose_HttpContent()
+    {
+        var content = new TrackingHttpContent("42");
+        _factory.SetStubResponse(() => new HttpResponseMessage(HttpStatusCode.OK)
+        {
+            Content = content
+        });
+
+        var result = await _controller.IncrementValueAsync(0);
+
+        result.ShouldBe(42);
+        content.Disposed.ShouldBeTrue();
+    }
+
+    [Fact]
+    public async Task Successful_Response_With_Void_Return_Should_Dispose_HttpContent()
+    {
+        var content = new TrackingHttpContent(string.Empty);
+        _factory.SetStubResponse(() => new HttpResponseMessage(HttpStatusCode.NoContent)
+        {
+            Content = content
+        });
+
+        await _controller.GetException1Async();
+
+        content.Disposed.ShouldBeTrue();
+    }
+
+    class StubProxyHttpClientFactory : IProxyHttpClientFactory
+    {
+        private readonly ITestServerAccessor _testServerAccessor;
+
+        private int _count;
+        private Func<HttpResponseMessage> _responseFactory;
+
+        public StubProxyHttpClientFactory(ITestServerAccessor testServerAccessor)
+        {
+            _testServerAccessor = testServerAccessor;
+        }
+
+        public void SetStubResponse(Func<HttpResponseMessage> responseFactory)
+        {
+            _responseFactory = responseFactory;
+        }
+
+        public HttpClient Create(string name) => Create();
+
+        public HttpClient Create()
+        {
+            if (_count++ == 0)
+            {
+                return _testServerAccessor.Server.CreateClient();
+            }
+
+            return new HttpClient(new StubHttpMessageHandler(() =>
+                _responseFactory?.Invoke()
+                ?? throw new InvalidOperationException("Stub response is not configured.")))
+            {
+                BaseAddress = new Uri("http://localhost/")
+            };
+        }
+    }
+
+    class StubHttpMessageHandler : HttpMessageHandler
+    {
+        private readonly Func<HttpResponseMessage> _responseFactory;
+
+        public StubHttpMessageHandler(Func<HttpResponseMessage> responseFactory)
+        {
+            _responseFactory = responseFactory;
+        }
+
+        protected override Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken)
+        {
+            return Task.FromResult(_responseFactory());
+        }
+    }
+
+    class TrackingHttpContent : HttpContent
+    {
+        private readonly byte[] _data;
+
+        public bool Disposed { get; private set; }
+
+        public TrackingHttpContent(string text)
+        {
+            _data = Encoding.UTF8.GetBytes(text);
+        }
+
+        protected override Task SerializeToStreamAsync(Stream stream, TransportContext context)
+        {
+            return stream.WriteAsync(_data, 0, _data.Length);
+        }
+
+        protected override bool TryComputeLength(out long length)
+        {
+            length = _data.Length;
+            return true;
+        }
+
+        protected override void Dispose(bool disposing)
+        {
+            Disposed = true;
+            base.Dispose(disposing);
+        }
+    }
+}