Added some wrapper around the http context so i can at least pretend to access things from it without casting them

src/Ocelot.Library/Infrastructure/Services/CannotAddDataError.cs

@@ -0,0 +1,11 @@
+using Ocelot.Library.Infrastructure.Responses;
+
+namespace Ocelot.Library.Infrastructure.Services
+{
+    public class CannotAddDataError : Error
+    {
+        public CannotAddDataError(string message) : base(message)
+        {
+        }
+    }
+}

src/Ocelot.Library/Infrastructure/Services/CannotFindDataError.cs

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+using Ocelot.Library.Infrastructure.Responses;
+
+namespace Ocelot.Library.Infrastructure.Services
+{
+    public class CannotFindDataError : Error
+    {
+        public CannotFindDataError(string message) : base(message)
+        {
+        }
+    }
+}

src/Ocelot.Library/Infrastructure/Services/IRequestDataService.cs

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+using Ocelot.Library.Infrastructure.Responses;
+
+namespace Ocelot.Library.Infrastructure.Services
+{
+    public interface IRequestDataService
+    {
+        Response Add<T>(string key, T value);
+        Response<T> Get<T>(string key);
+    }
+}

src/Ocelot.Library/Infrastructure/Services/RequestDataService.cs

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+using System;
+using System.Collections.Generic;
+using Microsoft.AspNetCore.Http;
+using Ocelot.Library.Infrastructure.Responses;
+
+namespace Ocelot.Library.Infrastructure.Services
+{
+    public class RequestDataService : IRequestDataService
+    {
+        private readonly IHttpContextAccessor _httpContextAccessor;
+
+        public RequestDataService(IHttpContextAccessor httpContextAccessor)
+        {
+            _httpContextAccessor = httpContextAccessor;
+        }
+
+        public Response Add<T>(string key, T value)
+        {
+            try
+            {
+                _httpContextAccessor.HttpContext.Items.Add(key, value);
+                return new OkResponse();
+            }
+            catch (Exception exception)
+            {
+                return new ErrorResponse(new List<Error>
+                {
+                    new CannotAddDataError(string.Format($"Unable to add data for key: {key}, exception: {exception.Message}"))
+                });
+            }
+        }
+
+        public Response<T> Get<T>(string key)
+        {
+            object obj;
+
+            if(_httpContextAccessor.HttpContext.Items.TryGetValue(key, out obj))
+            {
+                var data = (T) obj;
+                return new OkResponse<T>(data);
+            }
+
+            return new ErrorResponse<T>(new List<Error>
+            {
+                new CannotFindDataError($"Unable to find data for key: {key}")
+            });
+        } 
+    }
+}