Merge branch 'v4.0' into dev11

Conflicts:
	src/DotNetOpenAuth.sln

1 files changed, 148 insertions, 0 deletions

diff --git a/src/DotNetOpenAuth.AspNet/Clients/OAuth2/FacebookClient.cs b/src/DotNetOpenAuth.AspNet/Clients/OAuth2/FacebookClient.cs
new file mode 100644
index 0000000..f4ad20b
--- /dev/null
+++ b/src/DotNetOpenAuth.AspNet/Clients/OAuth2/FacebookClient.cs
@@ -0,0 +1,148 @@
+//-----------------------------------------------------------------------
+// <copyright file="FacebookClient.cs" company="Microsoft">
+//     Copyright (c) Microsoft. All rights reserved.
+// </copyright>
+//-----------------------------------------------------------------------
+
+namespace DotNetOpenAuth.AspNet.Clients {
+	using System;
+	using System.Collections.Generic;
+	using System.Diagnostics.CodeAnalysis;
+	using System.Net;
+	using System.Web;
+	using DotNetOpenAuth.Messaging;
+
+	/// <summary>
+	/// The facebook client.
+	/// </summary>
+	[SuppressMessage("Microsoft.Naming", "CA1704:IdentifiersShouldBeSpelledCorrectly", MessageId = "Facebook", Justification = "Brand name")]
+	public sealed class FacebookClient : OAuth2Client {
+		#region Constants and Fields
+
+		/// <summary>
+		/// The authorization endpoint.
+		/// </summary>
+		private const string AuthorizationEndpoint = "https://www.facebook.com/dialog/oauth";
+
+		/// <summary>
+		/// The token endpoint.
+		/// </summary>
+		private const string TokenEndpoint = "https://graph.facebook.com/oauth/access_token";
+
+		/// <summary>
+		/// The _app id.
+		/// </summary>
+		private readonly string appId;
+
+		/// <summary>
+		/// The _app secret.
+		/// </summary>
+		private readonly string appSecret;
+
+		#endregion
+
+		#region Constructors and Destructors
+
+		/// <summary>
+		/// Initializes a new instance of the <see cref="FacebookClient"/> class.
+		/// </summary>
+		/// <param name="appId">
+		/// The app id.
+		/// </param>
+		/// <param name="appSecret">
+		/// The app secret.
+		/// </param>
+		public FacebookClient(string appId, string appSecret)
+			: base("facebook") {
+			Requires.NotNullOrEmpty(appId, "appId");
+			Requires.NotNullOrEmpty(appSecret, "appSecret");
+
+			this.appId = appId;
+			this.appSecret = appSecret;
+		}
+
+		#endregion
+
+		#region Methods
+
+		/// <summary>
+		/// The get service login url.
+		/// </summary>
+		/// <param name="returnUrl">
+		/// The return url.
+		/// </param>
+		/// <returns>An absolute URI.</returns>
+		protected override Uri GetServiceLoginUrl(Uri returnUrl) {
+			// Note: Facebook doesn't like us to url-encode the redirect_uri value
+			var builder = new UriBuilder(AuthorizationEndpoint);
+			builder.AppendQueryArgs(
+				new Dictionary<string, string> { { "client_id", this.appId }, { "redirect_uri", returnUrl.AbsoluteUri }, });
+			return builder.Uri;
+		}
+
+		/// <summary>
+		/// The get user data.
+		/// </summary>
+		/// <param name="accessToken">
+		/// The access token.
+		/// </param>
+		/// <returns>A dictionary of profile data.</returns>
+		protected override IDictionary<string, string> GetUserData(string accessToken) {
+			FacebookGraphData graphData;
+			var request =
+				WebRequest.Create(
+					"https://graph.facebook.com/me?access_token=" + MessagingUtilities.EscapeUriDataStringRfc3986(accessToken));
+			using (var response = request.GetResponse()) {
+				using (var responseStream = response.GetResponseStream()) {
+					graphData = JsonHelper.Deserialize<FacebookGraphData>(responseStream);
+				}
+			}
+
+			// this dictionary must contains 
+			var userData = new Dictionary<string, string>();
+			userData.AddItemIfNotEmpty("id", graphData.Id);
+			userData.AddItemIfNotEmpty("username", graphData.Email);
+			userData.AddItemIfNotEmpty("name", graphData.Name);
+			userData.AddItemIfNotEmpty("link", graphData.Link == null ? null : graphData.Link.AbsoluteUri);
+			userData.AddItemIfNotEmpty("gender", graphData.Gender);
+			userData.AddItemIfNotEmpty("birthday", graphData.Birthday);
+			return userData;
+		}
+
+		/// <summary>
+		/// Obtains an access token given an authorization code and callback URL.
+		/// </summary>
+		/// <param name="returnUrl">
+		/// The return url.
+		/// </param>
+		/// <param name="authorizationCode">
+		/// The authorization code.
+		/// </param>
+		/// <returns>
+		/// The access token.
+		/// </returns>
+		protected override string QueryAccessToken(Uri returnUrl, string authorizationCode) {
+			// Note: Facebook doesn't like us to url-encode the redirect_uri value
+			var builder = new UriBuilder(TokenEndpoint);
+			builder.AppendQueryArgs(
+				new Dictionary<string, string> {
+					{ "client_id", this.appId },
+					{ "redirect_uri", returnUrl.AbsoluteUri },
+					{ "client_secret", this.appSecret },
+					{ "code", authorizationCode },
+				});
+
+			using (WebClient client = new WebClient()) {
+				string data = client.DownloadString(builder.Uri);
+				if (string.IsNullOrEmpty(data)) {
+					return null;
+				}
+
+				var parsedQueryString = HttpUtility.ParseQueryString(data);
+				return parsedQueryString["access_token"];
+			}
+		}
+
+		#endregion
+	}
+}