Enhance the error that occurs during the http request.

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

@@ -42,7 +42,7 @@ namespace Volo.Abp.AspNetCore.ExceptionHandling
         {
             var errorInfo = CreateErrorInfoWithoutCode(exception, includeSensitiveDetails);
 
-            if (exception is IHasErrorCode hasErrorCodeException)
+            if (exception is IHasErrorCode hasErrorCodeException && hasErrorCodeException.Code.IsNullOrWhiteSpace())
             {
                 errorInfo.Code = hasErrorCodeException.Code;
             }
@@ -61,7 +61,7 @@ namespace Volo.Abp.AspNetCore.ExceptionHandling
 
             if (exception is AbpRemoteCallException remoteCallException)
             {
-                return remoteCallException.Error;
+                return remoteCallException.Error ?? new RemoteServiceErrorInfo(remoteCallException.Message);
             }
 
             if (exception is AbpDbConcurrencyException)
@@ -175,7 +175,7 @@ namespace Volo.Abp.AspNetCore.ExceptionHandling
 
             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

@@ -15,7 +15,14 @@ namespace Volo.Abp.Http.Client
 
         public RemoteServiceErrorInfo Error { get; set; }
 
-        public AbpRemoteCallException()
+        public AbpRemoteCallException(string message)
+            : base(message)
+        {
+
+        }
+
+        public AbpRemoteCallException(string message, Exception innerException)
+            : base(message, innerException)
         {
 
         }

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

@@ -132,11 +132,20 @@ namespace Volo.Abp.Http.Client.ClientProxying
                 );
             }
 
-            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)
             {