ASP.NET MVC 4 プロジェクトで、ユーザーが SoundCloud 経由で認証できるようにしたいと考えています。.NET SDK がないのでOAuth2Client、認証を処理するカスタムを作成しました。クライアントを myAuthConfig.csに追加すると、ログインのオプションとして適切に表示されました。問題は、ボタンをクリックしてログインすると、常に返されることです
Login Failure.
Unsuccessful login with service.
SoundCloud へのログインを求められることさえありません。何が問題ですか？GitHub に非常によく似たクライアントを実装しましたが、問題なく動作しました。
これが私のクライアントです：
public class SoundCloudOAuth2Client : OAuth2Client
{
private const string ENDUSERAUTHLINK = "https://soundcloud.com/connect";
private const string TOKENLINK = "https://api.soundcloud.com/oauth2/token";
private readonly string _clientID;
private readonly string _clientSecret;
public SoundCloudOAuth2Client(string clientID, string clientSecret) : base("SoundCloud")
{
if (string.IsNullOrWhiteSpace(clientID)) {
throw new ArgumentNullException("clientID");
}
if (string.IsNullOrWhiteSpace(clientSecret)) {
throw new ArgumentNullException("clientSecret");
}
_clientID = clientID;
_clientSecret = clientSecret;
}
protected override Uri GetServiceLoginUrl(Uri returnUrl)
{
StringBuilder serviceUrl = new StringBuilder();
serviceUrl.Append(ENDUSERAUTHLINK);
serviceUrl.AppendFormat("?client_id={0}", _clientID);
serviceUrl.AppendFormat("&response_type={0}", "code");
serviceUrl.AppendFormat("&scope={0}", "non-expiring");
serviceUrl.AppendFormat("&redirect_uri={0}", System.Uri.EscapeDataString(returnUrl.ToString()));
return new Uri(serviceUrl.ToString());
}
public override void RequestAuthentication(HttpContextBase context, Uri returnUrl)
{
base.RequestAuthentication(context, returnUrl);
}
protected override IDictionary<string, string> GetUserData(string accessToken)
{
IDictionary<String, String> extraData = new Dictionary<String, String>();
var webRequest = (HttpWebRequest)WebRequest.Create("https://api.soundcloud.com/me.json?oauth_token=" + accessToken);
webRequest.Method = "GET";
string response = "";
using (HttpWebResponse webResponse = HttpWebResponse)webRequest.GetResponse())
{
using (StreamReader reader = new StreamReader(webResponse.GetResponseStream()))
{
response = reader.ReadToEnd();
}
}
var json = JObject.Parse(response);
string id = (string)json["id"];
string username = (string)json["username"];
string permalinkUrl = (string)json["permalink_url"];
extraData = new Dictionary<String, String>
{
{"SCAccessToken", accessToken},
{"username", username},
{"permalinkUrl", permalinkUrl},
{"id", id}
};
return extraData;
}
protected override string QueryAccessToken(Uri returnUrl, string authorizationCode)
{
StringBuilder postData = new StringBuilder();
postData.AppendFormat("client_id={0}", this._clientID);
postData.AppendFormat("&redirect_uri={0}", HttpUtility.UrlEncode(returnUrl.ToString()));
postData.AppendFormat("&client_secret={0}", this._clientSecret);
postData.AppendFormat("&grant_type={0}", "authorization_code");
postData.AppendFormat("&code={0}", authorizationCode);
string response = "";
string accessToken = "";
var webRequest = (HttpWebRequest)WebRequest.Create(TOKENLINK);
webRequest.Method = "POST";
webRequest.ContentType = "application/x-www-form-urlencoded";
using (Stream s = webRequest.GetRequestStream())
{
using (StreamWriter sw = new StreamWriter(s))
sw.Write(postData.ToString());
}
using (WebResponse webResponse = webRequest.GetResponse())
{
using (StreamReader reader = new StreamReader(webResponse.GetResponseStream()))
{
response = reader.ReadToEnd();
}
}
var json = JObject.Parse(response);
accessToken = (string)json["access_token"];
return accessToken;
}
public override AuthenticationResult VerifyAuthentication(HttpContextBase context, Uri returnPageUrl)
{
string code = context.Request.QueryString["code"];
string u = context.Request.Url.ToString();
if (string.IsNullOrEmpty(code))
{
return AuthenticationResult.Failed;
}
string accessToken = this.QueryAccessToken(returnPageUrl, code);
if (accessToken == null)
{
return AuthenticationResult.Failed;
}
IDictionary<string, string> userData = this.GetUserData(accessToken);
if (userData == null)
{
return AuthenticationResult.Failed;
}
string id = userData["id"];
string name;
if (!userData.TryGetValue("username", out name) && !userData.TryGetValue("name", out name))
{
name = id;
}
return new AuthenticationResult(
isSuccessful: true, provider: "SoundCloud", providerUserId: id, userName: name, extraData: userData);
}
}
そしてAuthConfig.cs：
public static void RegisterAuth()
{
OAuthWebSecurity.RegisterClient(new SoundCloudOAuth2Client(
clientID: MyValues.MyClientID,
clientSecret: MyValues.MyClientSECRET),
displayName: "SoundCloud",
extraData: null);
OAuthWebSecurity.RegisterClient(new GitHubOAuth2Client(
appId: MyValues.GITHUBAPPID,
appSecret: MyValues.GITHUBAPPSECRET), "GitHub", null);
OAuthWebSecurity.RegisterGoogleClient();
OAuthWebSecurity.RegisterYahooClient();
}