Fixes AsHttpResposneMessage() exception when response has no stream.

Fixes #226

2 files changed, 15 insertions, 3 deletions

diff --git a/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs b/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
index ab56d8b..b266a62 100644
--- a/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
+++ b/src/DotNetOpenAuth.Core/Messaging/MessagingUtilities.cs
@@ -171,9 +171,10 @@ namespace DotNetOpenAuth.Messaging {
 		/// <param name="outgoingResponse">The response to send to the user agent.</param>
 		/// <returns>The <see cref="HttpResponseMessage"/> instance to be returned by the Web API method.</returns>
 		public static HttpResponseMessage AsHttpResponseMessage(this OutgoingWebResponse outgoingResponse) {
-			HttpResponseMessage response = new HttpResponseMessage(outgoingResponse.Status) {
-				Content = new StreamContent(outgoingResponse.ResponseStream)
-			};
+			HttpResponseMessage response = new HttpResponseMessage(outgoingResponse.Status);
+			if (outgoingResponse.ResponseStream != null) {
+				response.Content = new StreamContent(outgoingResponse.ResponseStream);
+			}
 
 			var responseHeaders = outgoingResponse.Headers;
 			foreach (var header in responseHeaders.AllKeys) {
diff --git a/src/DotNetOpenAuth.Test/Messaging/MessagingUtilitiesTests.cs b/src/DotNetOpenAuth.Test/Messaging/MessagingUtilitiesTests.cs
index 45583bf..8620b93 100644
--- a/src/DotNetOpenAuth.Test/Messaging/MessagingUtilitiesTests.cs
+++ b/src/DotNetOpenAuth.Test/Messaging/MessagingUtilitiesTests.cs
@@ -91,6 +91,17 @@ namespace DotNetOpenAuth.Test.Messaging {
 		}
 
 		[Test]
+		public void AsHttpResponseMessageNoContent() {
+			var outgoingResponse = new OutgoingWebResponse();
+			outgoingResponse.Headers.Add("X-SOME-HEADER", "value");
+
+			var httpResponseMessage = outgoingResponse.AsHttpResponseMessage();
+			Assert.That(httpResponseMessage, Is.Not.Null);
+			Assert.That(httpResponseMessage.Headers.GetValues("X-SOME-HEADER").ToList(), Is.EqualTo(new[] { "value" }));
+			Assert.That(httpResponseMessage.Content, Is.Null);
+		}
+
+		[Test]
 		public void ToDictionary() {
 			NameValueCollection nvc = new NameValueCollection();
 			nvc["a"] = "b";