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Diffstat (limited to 'src/DotNetOpenAuth.Web/Clients/OAuth/TwitterClient.cs')
| -rw-r--r-- | src/DotNetOpenAuth.Web/Clients/OAuth/TwitterClient.cs | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/src/DotNetOpenAuth.Web/Clients/OAuth/TwitterClient.cs b/src/DotNetOpenAuth.Web/Clients/OAuth/TwitterClient.cs new file mode 100644 index 0000000..6d82607 --- /dev/null +++ b/src/DotNetOpenAuth.Web/Clients/OAuth/TwitterClient.cs @@ -0,0 +1,94 @@ +using System; +using System.Collections.Generic; +using System.IO; +using System.Net; +using System.Xml.Linq; +using DotNetOpenAuth.Messaging; +using DotNetOpenAuth.OAuth; +using DotNetOpenAuth.OAuth.ChannelElements; +using DotNetOpenAuth.OAuth.Messages; + +namespace DotNetOpenAuth.Web.Clients +{ + /// <summary> + /// Represents a Twitter client + /// </summary> + internal class TwitterClient : OAuthClient + { + /// <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 + { + RequestTokenEndpoint = new MessageReceivingEndpoint("http://twitter.com/oauth/request_token", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest), + UserAuthorizationEndpoint = new MessageReceivingEndpoint("http://twitter.com/oauth/authenticate", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest), + AccessTokenEndpoint = new MessageReceivingEndpoint("http://twitter.com/oauth/access_token", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest), + TamperProtectionElements = new ITamperProtectionChannelBindingElement[] { new HmacSha1SigningBindingElement() }, + }; + + /// <summary> + /// Initializes a new instance of the <see cref="TwitterClient"/> class with the specified consumer key and consumer secret. + /// </summary> + /// <param name="consumerKey">The consumer key.</param> + /// <param name="consumerSecret">The consumer secret.</param> + [System.Diagnostics.CodeAnalysis.SuppressMessage( + "Microsoft.Reliability", + "CA2000:Dispose objects before losing scope", + Justification = "We can't dispose the object because we still need it through the app lifetime.")] + public TwitterClient(string consumerKey, string consumerSecret) : + base("twitter", TwitterServiceDescription, consumerKey, consumerSecret) + { + } + + /// <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> + /// <returns> + /// Authentication result + /// </returns> + [System.Diagnostics.CodeAnalysis.SuppressMessage( + "Microsoft.Design", + "CA1031:DoNotCatchGeneralExceptionTypes", + Justification = "We don't care if the request for additional data fails.")] + protected override AuthenticationResult VerifyAuthenticationCore(AuthorizedTokenResponse response) + { + string accessToken = response.AccessToken; + string userId = response.ExtraData["user_id"]; + string userName = response.ExtraData["screen_name"]; + + string profileRequestUrl = "http://api.twitter.com/1/users/show.xml?user_id=" + Uri.EscapeDataString(userId); + var profileEndpoint = new MessageReceivingEndpoint(profileRequestUrl, HttpDeliveryMethods.GetRequest); + HttpWebRequest request = WebWorker.PrepareAuthorizedRequest(profileEndpoint, accessToken); + + var extraData = new Dictionary<string, string>(); + try + { + using (WebResponse profileResponse = request.GetResponse()) + { + using (Stream responseStream = profileResponse.GetResponseStream()) + { + XDocument document = XDocument.Load(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: ProviderName, + providerUserId: userId, + userName: userName, + extraData: extraData); + } + } +}
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