fixed a bug where getting invalid parameter error if sending a steam content with no stream, now we try convert to byte array which the c# http client is happy to take if empty...or this error is caused because we are trying to use a stream when we shouldnt.

src/Ocelot/RequestBuilder/Builder/HttpRequestBuilder.cs

@@ -12,17 +12,18 @@ namespace Ocelot.RequestBuilder.Builder
     public class HttpRequestBuilder : IRequestBuilder
     {
         public async Task<Response<Request>> Build(string httpMethod, string downstreamUrl, Stream content, IHeaderDictionary headers,
-            IRequestCookieCollection cookies, string queryString, string contentType)
+            IRequestCookieCollection cookies, QueryString queryString, string contentType)
         {
             var method = new HttpMethod(httpMethod);
 
-            var uri = new Uri(string.Format("{0}{1}", downstreamUrl, queryString));
+            var uri = new Uri(string.Format("{0}{1}", downstreamUrl, queryString.ToUriComponent()));
+
 
             var httpRequestMessage = new HttpRequestMessage(method, uri);
 
             if (content != null)
             {
-                httpRequestMessage.Content = new StreamContent(content);
+                httpRequestMessage.Content = new ByteArrayContent(ToByteArray(content));
             }
 
             if (!string.IsNullOrEmpty(contentType))
@@ -35,11 +36,7 @@ namespace Ocelot.RequestBuilder.Builder
             if (headers != null)
             {
                 headers.Remove("Content-Type");
-            }
 
-            //todo get rid of if
-            if (headers != null)
-            {
                 foreach (var header in headers)
                 {
                     //todo get rid of if..
@@ -63,5 +60,17 @@ namespace Ocelot.RequestBuilder.Builder
             
             return new OkResponse<Request>(new Request(httpRequestMessage, cookieContainer));
         }
+
+        private byte[] ToByteArray(Stream stream)
+        {
+            using (stream)
+            {
+                using (MemoryStream memStream = new MemoryStream())
+                {
+                    stream.CopyTo(memStream);
+                    return memStream.ToArray();
+                }
+            }
+        }
     }
 }

src/Ocelot/RequestBuilder/Builder/IRequestBuilder.cs

@@ -12,7 +12,7 @@ namespace Ocelot.RequestBuilder.Builder
             Stream content,
             IHeaderDictionary headers,
             IRequestCookieCollection cookies,
-            string queryString,
+            QueryString queryString,
             string contentType);
     }
 }

src/Ocelot/RequestBuilder/Middleware/HttpRequestBuilderMiddleware.cs

@@ -34,7 +34,7 @@ namespace Ocelot.RequestBuilder.Middleware
 
             var request = await _requestBuilder
               .Build(context.Request.Method, downstreamUrl.Data, context.Request.Body,
-              context.Request.Headers, context.Request.Cookies, context.Request.QueryString.Value, context.Request.ContentType);
+              context.Request.Headers, context.Request.Cookies, context.Request.QueryString, context.Request.ContentType);
 
             if (request.IsError)
             {

test/Ocelot.AcceptanceTests/RoutingTests.cs

@@ -106,6 +106,31 @@ namespace Ocelot.AcceptanceTests
                 .BDDfy();
         }
 
+        [Fact]
+        public void should_return_response_201_with_complex_query_string()
+        {
+            var yamlConfiguration = new YamlConfiguration
+            {
+                ReRoutes = new List<YamlReRoute>
+                    {
+                        new YamlReRoute
+                        {
+                            DownstreamTemplate = "http://localhost:51879/newThing",
+                            UpstreamTemplate = "/newThing",
+                            UpstreamHttpMethod = "Get",
+                        }
+                    }
+            };
+
+            this.Given(x => x.GivenThereIsAServiceRunningOn("http://localhost:51879", 200, "Hello from Laura"))
+                .And(x => _steps.GivenThereIsAConfiguration(yamlConfiguration))
+                .And(x => _steps.GivenOcelotIsRunning())
+                .When(x => _steps.WhenIGetUrlOnTheApiGateway("/newThing?DeviceType=IphoneApp&Browser=moonpigIphone&BrowserString=-&CountryCode=123&DeviceName=iPhone 5 (GSM+CDMA)&OperatingSystem=iPhone OS 7.1.2&BrowserVersion=3708AdHoc&ipAddress=-"))
+                .Then(x => _steps.ThenTheStatusCodeShouldBe(HttpStatusCode.OK))
+                .And(x => _steps.ThenTheResponseBodyShouldBe("Hello from Laura"))
+                .BDDfy();
+        }
+
         private void GivenThereIsAServiceRunningOn(string url, int statusCode, string responseBody)
         {
             _builder = new WebHostBuilder()

test/Ocelot.ManualTest/configuration.yaml

@@ -21,9 +21,6 @@ ReRoutes:
     LocationId: Claims[LocationId] > value
     UserType: Claims[sub] > value[0] > |
     UserId: Claims[sub] > value[1] > |
-- DownstreamTemplate: http://www.bbc.co.uk
-  UpstreamTemplate: /
-  UpstreamHttpMethod: Get
-- DownstreamTemplate: http://localhost:51879/api/products/{productId}
-  UpstreamTemplate: /products/{productId}
+- DownstreamTemplate: http://jsonplaceholder.typicode.com/posts
+  UpstreamTemplate: /posts
   UpstreamHttpMethod: Get

test/Ocelot.UnitTests/RequestBuilder/HttpRequestBuilderMiddlewareTests.cs

@@ -69,7 +69,7 @@ namespace Ocelot.UnitTests.RequestBuilder
             _request = new OkResponse<Request>(request);
             _requestBuilder
                 .Setup(x => x.Build(It.IsAny<string>(), It.IsAny<string>(), It.IsAny<Stream>(), It.IsAny<IHeaderDictionary>(),
-                It.IsAny<IRequestCookieCollection>(), It.IsAny<string>(), It.IsAny<string>()))
+                It.IsAny<IRequestCookieCollection>(), It.IsAny<QueryString>(), It.IsAny<string>()))
                 .ReturnsAsync(_request);
         }
 

test/Ocelot.UnitTests/RequestBuilder/RequestBuilderTests.cs

@@ -21,7 +21,7 @@ namespace Ocelot.UnitTests.RequestBuilder
         private HttpContent _content;
         private IHeaderDictionary _headers;
         private IRequestCookieCollection _cookies;
-        private string _query;
+        private QueryString _query;
         private string _contentType;
         private readonly IRequestBuilder _requestBuilder;
         private Response<Request> _result;
@@ -137,7 +137,7 @@ namespace Ocelot.UnitTests.RequestBuilder
         {
             this.Given(x => x.GivenIHaveHttpMethod("POST"))
                 .And(x => x.GivenIHaveDownstreamUrl("http://www.bbc.co.uk"))
-                .And(x => x.GivenTheQueryStringIs("?jeff=1&geoff=2"))
+                .And(x => x.GivenTheQueryStringIs(new QueryString("?jeff=1&geoff=2")))
                 .When(x => x.WhenICreateARequest())
                 .And(x => x.ThenTheCorrectQueryStringIsUsed("?jeff=1&geoff=2"))
                 .BDDfy();
@@ -153,7 +153,7 @@ namespace Ocelot.UnitTests.RequestBuilder
             _result.Data.HttpRequestMessage.RequestUri.Query.ShouldBe(expected);
         }
 
-        private void GivenTheQueryStringIs(string query)
+        private void GivenTheQueryStringIs(QueryString query)
         {
             _query = query;
         }