Adds a delegating HTTP handler that applies OAuth 1 signatures.

2 files changed, 62 insertions, 0 deletions

diff --git a/src/DotNetOpenAuth.OAuth.Consumer/OAuth/ConsumerBase.cs b/src/DotNetOpenAuth.OAuth.Consumer/OAuth/ConsumerBase.cs
index 80a1381..b59b438 100644
--- a/src/DotNetOpenAuth.OAuth.Consumer/OAuth/ConsumerBase.cs
+++ b/src/DotNetOpenAuth.OAuth.Consumer/OAuth/ConsumerBase.cs
@@ -79,6 +79,14 @@ namespace DotNetOpenAuth.OAuth {
 		internal OAuthChannel OAuthChannel { get; set; }
 
 		/// <summary>
+		/// Creates a message handler that signs outbound requests with a previously obtained authorization.
+		/// </summary>
+		/// <returns>A message handler.</returns>
+		public OAuth1HttpMessageHandler CreateMessageHandler() {
+			return new OAuth1HttpMessageHandler(this);
+		}
+
+		/// <summary>
 		/// Obtains an access token for a new account at the Service Provider via 2-legged OAuth.
 		/// </summary>
 		/// <param name="requestParameters">Any applicable parameters to include in the query string of the token request.</param>
diff --git a/src/DotNetOpenAuth.OAuth.Consumer/OAuth/OAuth1HttpMessageHandler.cs b/src/DotNetOpenAuth.OAuth.Consumer/OAuth/OAuth1HttpMessageHandler.cs
new file mode 100644
index 0000000..cfbb70e
--- /dev/null
+++ b/src/DotNetOpenAuth.OAuth.Consumer/OAuth/OAuth1HttpMessageHandler.cs
@@ -0,0 +1,54 @@
+namespace DotNetOpenAuth.OAuth {
+	using System;
+	using System.Collections.Generic;
+	using System.Linq;
+	using System.Net.Http;
+	using System.Text;
+	using System.Threading;
+	using System.Threading.Tasks;
+
+	using DotNetOpenAuth.Messaging;
+
+	using Validation;
+
+	public class OAuth1HttpMessageHandler : DelegatingHandler {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="OAuth1HttpMessageHandler" /> class.
+		/// </summary>
+		/// <param name="consumer">The consumer.</param>
+		/// <param name="accessToken">The access token.</param>
+		public OAuth1HttpMessageHandler(ConsumerBase consumer = null, string accessToken = null) {
+			this.Consumer = consumer;
+			this.AccessToken = accessToken;
+		}
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="OAuth1HttpMessageHandler" /> class.
+		/// </summary>
+		/// <param name="innerHandler">The inner handler.</param>
+		/// <param name="consumer">The consumer.</param>
+		/// <param name="accessToken">The access token.</param>
+		public OAuth1HttpMessageHandler(HttpMessageHandler innerHandler, ConsumerBase consumer = null, string accessToken = null)
+			: base(innerHandler) {
+			this.Consumer = consumer;
+			this.AccessToken = accessToken;
+		}
+
+		public string AccessToken { get; set; }
+
+		public ConsumerBase Consumer { get; set; }
+
+		protected override async Task<HttpResponseMessage> SendAsync(HttpRequestMessage request, CancellationToken cancellationToken) {
+			Verify.Operation(this.Consumer != null, Strings.RequiredPropertyNotYetPreset, "Consumer");
+			Verify.Operation(!string.IsNullOrEmpty(this.AccessToken), Strings.RequiredPropertyNotYetPreset, "AccessToken");
+
+			var deliveryMethods = MessagingUtilities.GetHttpDeliveryMethod(request.Method.Method) | HttpDeliveryMethods.AuthorizationHeaderRequest;
+			var signed = await
+				this.Consumer.PrepareAuthorizedRequestAsync(
+					new MessageReceivingEndpoint(request.RequestUri, deliveryMethods), this.AccessToken, cancellationToken);
+			request.Headers.Authorization = signed.Headers.Authorization;
+
+			return await base.SendAsync(request, cancellationToken);
+		}
+	}
+}