1 files changed, 122 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.OAuth2/OAuth2/ChannelElements/OAuth2ClientChannel.cs b/src/DotNetOpenAuth.OAuth2/OAuth2/ChannelElements/OAuth2ClientChannel.cs
new file mode 100644
index 0000000..e4a9afd
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+++ b/src/DotNetOpenAuth.OAuth2/OAuth2/ChannelElements/OAuth2ClientChannel.cs
@@ -0,0 +1,122 @@
+//-----------------------------------------------------------------------
+// <copyright file="OAuth2ClientChannel.cs" company="Andrew Arnott">
+//     Copyright (c) Andrew Arnott. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.OAuth2.ChannelElements {
+	using System;
+	using System.Collections.Generic;
+	using System.Collections.Specialized;
+	using System.Diagnostics.Contracts;
+	using System.Net;
+	using System.Web;
+
+	using DotNetOpenAuth.Messaging;
+
+	/// <summary>
+	/// The messaging channel used by OAuth 2.0 Clients.
+	/// </summary>
+	internal class OAuth2ClientChannel : OAuth2ChannelBase {
+		/// <summary>
+		/// Initializes a new instance of the <see cref="OAuth2ClientChannel"/> class.
+		/// </summary>
+		internal OAuth2ClientChannel() {
+		}
+
+		/// <summary>
+		/// Prepares an HTTP request that carries a given message.
+		/// </summary>
+		/// <param name="request">The message to send.</param>
+		/// <returns>
+		/// The <see cref="HttpWebRequest"/> prepared to send the request.
+		/// </returns>
+		/// <remarks>
+		/// This method must be overridden by a derived class, unless the <see cref="Channel.RequestCore"/> method
+		/// is overridden and does not require this method.
+		/// </remarks>
+		protected override HttpWebRequest CreateHttpRequest(IDirectedProtocolMessage request) {
+			HttpWebRequest httpRequest;
+			if ((request.HttpMethods & HttpDeliveryMethods.GetRequest) != 0) {
+				httpRequest = InitializeRequestAsGet(request);
+			} else if ((request.HttpMethods & HttpDeliveryMethods.PostRequest) != 0) {
+				httpRequest = InitializeRequestAsPost(request);
+			} else {
+				throw new NotSupportedException();
+			}
+
+			return httpRequest;
+		}
+
+		/// <summary>
+		/// Gets the protocol message that may be in the given HTTP response.
+		/// </summary>
+		/// <param name="response">The response that is anticipated to contain an protocol message.</param>
+		/// <returns>
+		/// The deserialized message parts, if found.  Null otherwise.
+		/// </returns>
+		/// <exception cref="ProtocolException">Thrown when the response is not valid.</exception>
+		protected override IDictionary<string, string> ReadFromResponseCore(IncomingWebResponse response) {
+			// The spec says direct responses should be JSON objects, but Facebook uses HttpFormUrlEncoded instead, calling it text/plain
+			// Others return text/javascript.  Again bad.
+			string body = response.GetResponseReader().ReadToEnd();
+			if (response.ContentType.MediaType == JsonEncoded || response.ContentType.MediaType == JsonTextEncoded) {
+				return this.DeserializeFromJson(body);
+			} else if (response.ContentType.MediaType == HttpFormUrlEncoded || response.ContentType.MediaType == PlainTextEncoded) {
+				return HttpUtility.ParseQueryString(body).ToDictionary();
+			} else {
+				throw ErrorUtilities.ThrowProtocol("Unexpected response Content-Type {0}", response.ContentType.MediaType);
+			}
+		}
+
+		/// <summary>
+		/// Gets the protocol message that may be embedded in the given HTTP request.
+		/// </summary>
+		/// <param name="request">The request to search for an embedded message.</param>
+		/// <returns>
+		/// The deserialized message, if one is found.  Null otherwise.
+		/// </returns>
+		protected override IDirectedProtocolMessage ReadFromRequestCore(HttpRequestInfo request) {
+			Logger.Channel.DebugFormat("Incoming HTTP request: {0} {1}", request.HttpMethod, request.UrlBeforeRewriting.AbsoluteUri);
+
+			var fields = request.QueryStringBeforeRewriting.ToDictionary();
+
+			// Also read parameters from the fragment, if it's available.
+			// Typically the fragment is not available because the browser doesn't send it to a web server
+			// but this request may have been fabricated by an installed desktop app, in which case
+			// the fragment is available.
+			string fragment = request.UrlBeforeRewriting.Fragment;
+			if (!string.IsNullOrEmpty(fragment)) {
+				foreach (var pair in HttpUtility.ParseQueryString(fragment.Substring(1)).ToDictionary()) {
+					fields.Add(pair.Key, pair.Value);
+				}
+			}
+
+			MessageReceivingEndpoint recipient;
+			try {
+				recipient = request.GetRecipient();
+			} catch (ArgumentException ex) {
+				Logger.Messaging.WarnFormat("Unrecognized HTTP request: ", ex);
+				return null;
+			}
+
+			return (IDirectedProtocolMessage)this.Receive(fields, recipient);
+		}
+
+		/// <summary>
+		/// Queues a message for sending in the response stream where the fields
+		/// are sent in the response stream in querystring style.
+		/// </summary>
+		/// <param name="response">The message to send as a response.</param>
+		/// <returns>
+		/// The pending user agent redirect based message to be sent as an HttpResponse.
+		/// </returns>
+		/// <remarks>
+		/// This method implements spec OAuth V1.0 section 5.3.
+		/// </remarks>
+		protected override OutgoingWebResponse PrepareDirectResponse(IProtocolMessage response) {
+			// Clients don't ever send direct responses.
+			throw new NotImplementedException();
+		}
+	}
+}