Issue 1594: DefaultODataBatchHandler doesn't handle urls relative to the

batch endpoint properly.
The root cause is that the base uri of ODataMessageReaderSettings doesn't
end with slash.
The fix is only for v3 and v4 works well for all kinds of urls because
ODL v4 will append a slash in the end of the base uri if there isn't one.

src/System.Web.Http.OData/OData/Batch/DefaultODataBatchHandler.cs

@@ -110,7 +110,7 @@ public virtual async Task<IList<ODataBatchRequestItem>> ParseBatchRequestsAsync(
             {
                 DisableMessageStreamDisposal = true,
                 MessageQuotas = MessageQuotas,
-                BaseUri = GetBaseUri(request)
+                BaseUri = EnsureTrailingSlash(GetBaseUri(request))
             };
 
             ODataMessageReader reader = await request.Content.GetODataMessageReaderAsync(oDataReaderSettings, cancellationToken);

src/System.Web.Http.OData/OData/Batch/ODataBatchHandler.cs

@@ -1,5 +1,6 @@
 // Copyright (c) Microsoft Open Technologies, Inc. All rights reserved. See License.txt in the project root for license information.
 
+using System.Diagnostics.Contracts;
 using System.Web.Http.Batch;
 using Microsoft.Data.OData;
 
@@ -34,5 +35,17 @@ public ODataMessageQuotas MessageQuotas
         /// Gets or sets the name of the OData route associated with this batch handler.
         /// </summary>
         public string ODataRouteName { get; set; }
+
+        internal static Uri EnsureTrailingSlash(Uri uri)
+        {
+            Contract.Assert(uri != null);
+
+            if (!uri.OriginalString.EndsWith("/", StringComparison.Ordinal))
+            {
+                return new Uri(uri.OriginalString + "/");
+            }
+
+            return uri;
+        }
     }
 }

src/System.Web.Http.OData/OData/Batch/UnbufferedODataBatchHandler.cs

@@ -38,7 +38,7 @@ public override async Task<HttpResponseMessage> ProcessBatchAsync(HttpRequestMes
             {
                 DisableMessageStreamDisposal = true,
                 MessageQuotas = MessageQuotas,
-                BaseUri = GetBaseUri(request)
+                BaseUri = EnsureTrailingSlash(GetBaseUri(request))
             };
 
             ODataMessageReader reader = await request.Content.GetODataMessageReaderAsync(oDataReaderSettings, cancellationToken);

test/System.Web.Http.OData.Test/OData/Batch/DefaultODataBatchHandlerTest.cs

@@ -6,8 +6,12 @@
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Threading;
+using System.Web.Http.OData;
 using System.Web.Http.OData.Batch;
+using System.Web.Http.OData.Builder;
+using System.Web.Http.OData.Extensions;
 using System.Web.Http.Routing;
+using Microsoft.Data.Edm;
 using Microsoft.TestCommon;
 
 namespace System.Web.Http
@@ -324,5 +328,68 @@ public void ValidateRequest_Throws_IfRequestContentTypeDoesNotHaveBoundary()
             Assert.Equal("The batch request must have a boundary specification in the \"Content-Type\" header.",
                 errorResponse.Response.Content.ReadAsAsync<HttpError>().Result.Message);
         }
+
+        [Fact]
+        public void BatchRequest_Works_AbsoluteAndRelativeUri()
+        {
+            // Arrange
+            ODataConventionModelBuilder builder = new ODataConventionModelBuilder();
+            builder.EntitySet<BatchCustomer>("BatchCustomers");
+            IEdmModel model = builder.GetEdmModel();
+
+            HttpConfiguration configuration = new HttpConfiguration();
+            HttpServer server = new HttpServer(configuration);
+            HttpClient client = new HttpClient(server);
+            configuration.Routes.MapODataServiceRoute("odata", "odata", model, new DefaultODataBatchHandler(server));
+
+            HttpRequestMessage request = new HttpRequestMessage(HttpMethod.Post, "http://localhost/odata/$batch");
+            request.Content = new StringContent(
+@"--batch_36522ad7-fc75-4b56-8c71-56071383e77b
+Content-Type: application/http
+Content-Transfer-Encoding:binary
+
+GET http://localhost/odata/BatchCustomers(5) HTTP/1.1
+
+--batch_36522ad7-fc75-4b56-8c71-56071383e77b
+Content-Type: application/http
+Content-Transfer-Encoding:binary
+
+GET /odata/BatchCustomers(6) HTTP/1.1
+Host: localhost
+
+--batch_36522ad7-fc75-4b56-8c71-56071383e77b
+Content-Type: application/http
+Content-Transfer-Encoding:binary
+
+GET BatchCustomers(7) HTTP/1.1
+
+--batch_36522ad7-fc75-4b56-8c71-56071383e77b--
+");
+            request.Content.Headers.ContentType =
+                MediaTypeHeaderValue.Parse("multipart/mixed;boundary=batch_36522ad7-fc75-4b56-8c71-56071383e77b");
+
+            // Act
+            HttpResponseMessage response = client.SendAsync(request).Result;
+            string responseString = response.Content.ReadAsStringAsync().Result;
+
+            // Assert
+            Assert.Equal(HttpStatusCode.Accepted, response.StatusCode);
+            Assert.Contains("\"odata.metadata\":\"http://localhost/odata/$metadata#BatchCustomers/@Element\",\"ID\":5", responseString);
+            Assert.Contains("\"odata.metadata\":\"http://localhost/odata/$metadata#BatchCustomers/@Element\",\"ID\":6", responseString);
+            Assert.Contains("\"odata.metadata\":\"http://localhost/odata/$metadata#BatchCustomers/@Element\",\"ID\":7", responseString);
+        }
+
+        public class BatchCustomersController : ODataController
+        {
+            public IHttpActionResult Get(int key)
+            {
+                return Ok(new BatchCustomer { ID = key });
+            }
+        }
+
+        public class BatchCustomer
+        {
+            public int ID { get; set; }
+        }
     }
 }