Enhance the error that occurs during the http request.

framework/src/Volo.Abp.ExceptionHandling/Volo/Abp/AspNetCore/ExceptionHandling/DefaultExceptionToErrorInfoConverter.cs

@@ -59,7 +59,7 @@ protected virtual RemoteServiceErrorInfo CreateErrorInfoWithoutCode(Exception ex
 
             exception = TryToGetActualException(exception);
 
-            if (exception is AbpRemoteCallException remoteCallException)
+            if (exception is AbpRemoteCallException remoteCallException && remoteCallException.Error != null)
             {
                 return remoteCallException.Error;
             }
@@ -76,7 +76,7 @@ protected virtual RemoteServiceErrorInfo CreateErrorInfoWithoutCode(Exception ex
 
             var errorInfo = new RemoteServiceErrorInfo();
 
-            if (exception is IUserFriendlyException)
+            if (exception is IUserFriendlyException || exception is AbpRemoteCallException)
             {
                 errorInfo.Message = exception.Message;
                 errorInfo.Details = (exception as IHasErrorDetails)?.Details;
@@ -175,7 +175,7 @@ protected virtual RemoteServiceErrorInfo CreateEntityNotFoundError(EntityNotFoun
 
             return new RemoteServiceErrorInfo(exception.Message);
         }
-        
+
         protected virtual Exception TryToGetActualException(Exception exception)
         {
             if (exception is AggregateException && exception.InnerException != null)

framework/src/Volo.Abp.ExceptionHandling/Volo/Abp/Http/Client/AbpRemoteCallException.cs

@@ -20,14 +20,20 @@ public AbpRemoteCallException()
 
         }
 
+        public AbpRemoteCallException(string message, Exception innerException = null)
+            : base(message, innerException)
+        {
+
+        }
+
         public AbpRemoteCallException(SerializationInfo serializationInfo, StreamingContext context)
             : base(serializationInfo, context)
         {
 
         }
 
-        public AbpRemoteCallException(RemoteServiceErrorInfo error)
-            : base(error.Message)
+        public AbpRemoteCallException(RemoteServiceErrorInfo error, Exception innerException = null)
+            : base(error.Message, innerException)
         {
             Error = error;
 

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

@@ -132,11 +132,19 @@ protected virtual async Task<HttpContent> RequestAsync(ClientProxyRequestContext
                 );
             }
 
-            var response = await client.SendAsync(
-                requestMessage,
-                HttpCompletionOption.ResponseHeadersRead /*this will buffer only the headers, the content will be used as a stream*/,
-                GetCancellationToken(requestContext.Arguments)
-            );
+            HttpResponseMessage response;
+            try
+            {
+                response = await client.SendAsync(
+                    requestMessage,
+                    HttpCompletionOption.ResponseHeadersRead /*this will buffer only the headers, the content will be used as a stream*/,
+                    GetCancellationToken(requestContext.Arguments)
+                );
+            }
+            catch (Exception ex)
+            {
+                throw new AbpRemoteCallException($"An error occurred during the ABP remote HTTP request. ({ex.Message}) See the inner exception for details.", ex);
+            }
 
             if (!response.IsSuccessStatusCode)
             {
@@ -197,26 +205,46 @@ protected virtual async Task ThrowExceptionForResponseAsync(HttpResponseMessage
         {
             if (response.Headers.Contains(AbpHttpConsts.AbpErrorFormat))
             {
-                var errorResponse = JsonSerializer.Deserialize<RemoteServiceErrorResponse>(
-                    await response.Content.ReadAsStringAsync()
-                );
+                RemoteServiceErrorResponse errorResponse;
+                try
+                {
+                    errorResponse = JsonSerializer.Deserialize<RemoteServiceErrorResponse>(
+                        await response.Content.ReadAsStringAsync()
+                    );
+                }
+                catch (Exception ex)
+                {
+                    throw new AbpRemoteCallException(
+                        new RemoteServiceErrorInfo
+                        {
+                            Message = response.ReasonPhrase,
+                            Code = response.StatusCode.ToString()
+                        },
+                        ex
+                    )
+                    {
+                        HttpStatusCode = (int)response.StatusCode
+                    };
+                }
 
                 throw new AbpRemoteCallException(errorResponse.Error)
                 {
                     HttpStatusCode = (int) response.StatusCode
                 };
             }
-
-            throw new AbpRemoteCallException(
-                new RemoteServiceErrorInfo
-                {
-                    Message = response.ReasonPhrase,
-                    Code = response.StatusCode.ToString()
-                }
-            )
+            else
             {
-                HttpStatusCode = (int) response.StatusCode
-            };
+                throw new AbpRemoteCallException(
+                    new RemoteServiceErrorInfo
+                    {
+                        Message = response.ReasonPhrase,
+                        Code = response.StatusCode.ToString()
+                    }
+                )
+                {
+                    HttpStatusCode = (int) response.StatusCode
+                };
+            }
         }
 
         protected virtual void AddHeaders(

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

@@ -0,0 +1,61 @@
+using System.Net.Http;
+using System.Threading.Tasks;
+using Microsoft.Extensions.DependencyInjection;
+using Microsoft.Extensions.DependencyInjection.Extensions;
+using Microsoft.Extensions.Hosting;
+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 RegularTestControllerClientProxy_AbpRemoteCallException_Tests : AbpHttpClientTestBase
+    {
+        private readonly IRegularTestController _controller;
+
+        public RegularTestControllerClientProxy_AbpRemoteCallException_Tests()
+        {
+            _controller = ServiceProvider.GetRequiredService<IRegularTestController>();
+        }
+
+        protected override void ConfigureServices(HostBuilderContext context, IServiceCollection services)
+        {
+            services.Replace(ServiceDescriptor.Singleton<IProxyHttpClientFactory, TestProxyHttpClientFactory>());
+        }
+
+        [Fact]
+        public async Task AbpRemoteCallException_On_SendAsync_Test()
+        {
+            var exception = await Assert.ThrowsAsync<AbpRemoteCallException>(async () => await _controller.AbortRequestAsync(default));
+            exception.Message.ShouldContain("An error occurred during the ABP remote HTTP request.");
+        }
+
+        class TestProxyHttpClientFactory : IProxyHttpClientFactory
+        {
+            private readonly ITestServerAccessor _testServerAccessor;
+
+            private int _count;
+
+            public TestProxyHttpClientFactory(ITestServerAccessor testServerAccessor)
+            {
+                _testServerAccessor = testServerAccessor;
+            }
+
+            public HttpClient Create(string name) => Create();
+
+            public HttpClient Create()
+            {
+                if (_count++ > 0)
+                {
+                    //Will get an error on the SendAsync method.
+                    return new HttpClient();
+                }
+
+                // for DynamicHttpProxyInterceptor.GetActionApiDescriptionModel
+                return _testServerAccessor.Server.CreateClient();
+            }
+        }
+    }
+}

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

@@ -168,8 +168,8 @@ public async Task AbortRequestAsync()
             var result = await _controller.AbortRequestAsync(default);
             result.ShouldBe("AbortRequestAsync");
 
-            var exception = await Assert.ThrowsAsync<HttpRequestException>(async () => await _controller.AbortRequestAsync(cts.Token));
-            exception.InnerException.InnerException.Message.ShouldBe("The client aborted the request.");
+            var exception = await Assert.ThrowsAsync<AbpRemoteCallException>(async () => await _controller.AbortRequestAsync(cts.Token));
+            exception.InnerException.InnerException.InnerException.Message.ShouldBe("The client aborted the request.");
         }
     }
 }