我想让用户通过SoundCloud为我的ASP.NET MVC 4项目进行身份验证。由于没有.NET SDK,我编写了一个自定义OAuth2Client
来处理身份验证。将客户端添加到我的AuthConfig.cs
后,它会适当地显示为登录选项。问题是,当我点击按钮登录时,它总是返回
Login Failure.
Unsuccessful login with service.
甚至没有要求我登录SoundCloud。问题是什么?我为GitHub实现了一个非常类似的客户端,它没有任何问题。
这是我的客户:
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);
}
}
和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();
}
答案 0 :(得分:3)
要解决的问题有多个,从第一个运行的函数开始:GetServiceLoginUrl(Uri returnUrl)
自动创建的returnUrl
包含&符号,SoundCloud不喜欢它。您需要删除&符号,并确保SoundCloud帐户完全中的“身份验证重定向URI”与正在发送的内容(查询字符串和所有内容)相匹配。以下是默认情况下作为returnURL发送的内容的示例:
https://localhost:44301/Account/ExternalLoginCallback?__provider__=SoundCloud&__sid__=blahblahyoursid
第一步是删除&__sid__
值。您可以删除sid
值并将其作为state
参数传递,以防万一您需要它。新功能如下所示:
protected override Uri GetServiceLoginUrl(Uri returnUrl)
{
StringBuilder serviceUrl = new StringBuilder();
string sid = String.Empty;
if (returnUrl.ToString().Contains("__sid__"))
{
int index = returnUrl.ToString().IndexOf("__sid__") + 8;
int len = returnUrl.ToString().Length;
sid = returnUrl.ToString().Substring(index, len - index-1);
}
string redirectUri = returnUrl.ToString().Contains('&') ?
returnUrl.ToString().Substring(0,returnUrl.ToString().IndexOf("&")) :
returnUrl.ToString();
serviceUrl.Append(ENDUSERAUTHLINK);
serviceUrl.AppendFormat("?client_id={0}", _clientID);
serviceUrl.AppendFormat("&response_type={0}", "code");
serviceUrl.AppendFormat("&scope={0}", "non-expiring");
serviceUrl.AppendFormat("&state={0}", sid);
serviceUrl.AppendFormat("&redirect_uri={0}", System.Uri.EscapeDataString(redirectUri));
return new Uri(serviceUrl.ToString());
}
解决了部分问题。 SoundlCoud中的重定向URI现在只是https://localhost:44301/Account/ExternalLoginCallback?__provider__=SoundCloud
)。但尝试进行身份验证仍会返回false
。要解决的下一个问题是AccountController.cs
,具体为:
[AllowAnonymous]
public ActionResult ExternalLoginCallback(string returnUrl)
因为在第一行中,它会尝试返回:
AuthenticationResult result = OAuthWebSecurity.VerifyAuthentication(Url.Action("ExternalLoginCallback", new { ReturnUrl = returnUrl }));
并且这不适用于我的自定义OAuth2Client
,因为VerifyAuthentication
采用不同的参数。通过检测它是否是SoundCloud客户端,然后使用自定义VerifyAuthentication:
[AllowAnonymous]
public ActionResult ExternalLoginCallback(string returnUrl)
{
AuthenticationResult result;
var context = this.HttpContext;
string p = Tools.GetProviderNameFromQueryString(context.Request.QueryString);
if (!String.IsNullOrEmpty(p) && p.ToLower() == "soundcloud")
{
result = new SoundCloudOAuth2Client(
clientID: MyValues.SCCLIENTID,
clientSecret: MyValues.SCCLIENTSECRET).VerifyAuthentication(this.HttpContext, new Uri(String.Format("{0}/Account/ExternalLoginCallback?__provider__=SoundCloud", context.Request.Url.GetLeftPart(UriPartial.Authority).ToString())));
}
else
{
result = OAuthWebSecurity.VerifyAuthentication(Url.Action("ExternalLoginCallback", new { ReturnUrl = returnUrl }));
}
其中
public static string GetProviderNameFromQueryString(NameValueCollection queryString)
{
var result = queryString["__provider__"];
///commented out stuff
return result;
}
之后,一切正常,您可以成功进行身份验证。您可以配置GetUserData
以获取要保存的任何SoundCloud数据,然后将其保存到UserProfile或相关表中。关键部分是SCAccessToken
,因为这是您将来上传到其帐户所需的内容。