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//-----------------------------------------------------------------------
// <copyright file="TwitterClient.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.IO;
using System.Net;
using System.Net.Http;
using System.Threading;
using System.Threading.Tasks;
using System.Xml.Linq;
using DotNetOpenAuth.Messaging;
using DotNetOpenAuth.OAuth;
using DotNetOpenAuth.OAuth.ChannelElements;
using DotNetOpenAuth.OAuth.Messages;
/// <summary>
/// Represents a Twitter client
/// </summary>
public class TwitterClient : OAuthClient {
#region Constants and Fields
/// <summary>
/// The description of Twitter's OAuth protocol URIs for use with their "Sign in with Twitter" feature.
/// </summary>
public static readonly ServiceProviderDescription TwitterServiceDescription =
new ServiceProviderDescription(
"https://api.twitter.com/oauth/request_token",
"https://api.twitter.com/oauth/authenticate",
"https://api.twitter.com/oauth/access_token");
#endregion
#region Constructors and Destructors
/// <summary>
/// Initializes a new instance of the <see cref="TwitterClient"/> class.
/// </summary>
/// <param name="consumerKey">The consumer key.</param>
/// <param name="consumerSecret">The consumer secret.</param>
public TwitterClient(string consumerKey, string consumerSecret)
: base("twitter", TwitterServiceDescription, consumerKey, consumerSecret) {
}
#endregion
#region Methods
/// <summary>
/// Check if authentication succeeded after user is redirected back from the service provider.
/// </summary>
/// <param name="response">The response token returned from service provider</param>
/// <param name="cancellationToken">The cancellation token.</param>
/// <returns>
/// Authentication result
/// </returns>
[SuppressMessage("Microsoft.Design", "CA1031:DoNotCatchGeneralExceptionTypes",
Justification = "We don't care if the request for additional data fails.")]
protected override async Task<AuthenticationResult> VerifyAuthenticationCoreAsync(AccessTokenResponse response, CancellationToken cancellationToken) {
string userId = response.ExtraData["user_id"];
string userName = response.ExtraData["screen_name"];
var profileRequestUrl = new Uri("https://api.twitter.com/1/users/show.xml?user_id="
+ MessagingUtilities.EscapeUriDataStringRfc3986(userId));
var authorizingHandler = this.WebWorker.CreateMessageHandler(response.AccessToken);
var extraData = new Dictionary<string, string>();
extraData.Add("accesstoken", response.AccessToken.Token);
extraData.Add("accesstokensecret", response.AccessToken.Secret);
try {
using (var httpClient = new HttpClient(authorizingHandler)) {
using (HttpResponseMessage profileResponse = await httpClient.GetAsync(profileRequestUrl, cancellationToken)) {
using (Stream responseStream = await profileResponse.Content.ReadAsStreamAsync()) {
XDocument document = LoadXDocumentFromStream(responseStream);
extraData.AddDataIfNotEmpty(document, "name");
extraData.AddDataIfNotEmpty(document, "location");
extraData.AddDataIfNotEmpty(document, "description");
extraData.AddDataIfNotEmpty(document, "url");
}
}
}
}
catch (Exception) {
// At this point, the authentication is already successful.
// Here we are just trying to get additional data if we can.
// If it fails, no problem.
}
return new AuthenticationResult(
isSuccessful: true, provider: this.ProviderName, providerUserId: userId, userName: userName, extraData: extraData);
}
#endregion
}
}
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