asp.net mvc 4 - Google OAuth Log In Problems In MVC 4 Application -

i facing same issue mentioned in authenticationresult.issuccessful started returning false google

i using mvc 4 web api application , migrating mvc 5 big change. else facing same issue ?

are there samples on how use dotnetopenauth.oauth2 can skip migrating dotnetopenauth.googleoauth2 in mvc 5 app.

in case still need use google openid connect in mvc 4 here code:

in authconfig.cs write:

oauthwebsecurity.registerclient(new googlecustomclient("youtgoogleapikey", "googlesecret"), "google", null); 

and googlecustomclient class (based on linkedin oauth example found):

using dotnetopenauth.aspnet; using dotnetopenauth.aspnet.clients; using dotnetopenauth.oauth; using system; using system.collections.generic; using system.io; using system.net; using system.text; using system.text.regularexpressions; using system.web; using system.web.script.serialization;   namespace myproject.customproviders { public class googlecustomclient : oauth2client {     #region constants , fields     private const string authorizationendpoint = "https://accounts.google.com/o/oauth2/auth";     private const string tokenendpoint = "https://accounts.google.com/o/oauth2/token";     private readonly string _clientid;     private readonly string _clientsecret;     private string absolutereturnurl = string.empty;     #endregion      public googlecustomclient(string clientid, string clientsecret) : base("google")     {         this._clientid = clientid;         this._clientsecret = clientsecret;     }      protected override uri getserviceloginurl(uri returnurl)     {         stringbuilder serviceurl = new stringbuilder();         serviceurl.appendformat("{0}?", authorizationendpoint);         serviceurl.append("response_type=code");         serviceurl.appendformat("&client_id={0}", this._clientid);         serviceurl.append("&scope=email");         absolutereturnurl = regex.match(returnurl.tostring(), "https://(\\d|\\w|\\/|:|\\.){1,}").value;         serviceurl.appendformat("&redirect_uri={0}", uri.escapedatastring(absolutereturnurl));         serviceurl.appendformat("&state={0}", regex.match(returnurl.absoluteuri, "(?<=__sid__=).*?($|&)", regexoptions.ignorecase).value);         return new uri(serviceurl.tostring());     }      protected override idictionary<string, string> getuserdata(string accesstoken)     {         var request = webrequest.create("https://www.googleapis.com/oauth2/v1/userinfo?access_token=" + uri.escapedatastring(accesstoken));          string responsetext = string.empty;         using (var response = request.getresponse())         {             using (var responsestream = response.getresponsestream())             {                 using (var reader = new streamreader(responsestream, encoding.utf8))                 {                     responsetext = reader.readtoend();                 }             }         }         dictionary<string, string> userdata = new dictionary<string, string>();         javascriptserializer deserializer = new javascriptserializer();         dictionary<string, string> responsedata = deserializer.deserialize<dictionary<string, string>>(responsetext);         userdata.add("id", responsedata["id"]);         userdata.add("firstname", responsedata["given_name"]);         userdata.add("lastname", responsedata["family_name"]);         userdata.add("emailaddress", responsedata["email"]);         userdata.add("picture", responsedata["picture"]);         userdata.add("accesstoken", "");         userdata.add("alldata", responsetext);         return userdata;     }      protected override string queryaccesstoken(uri returnurl, string authorizationcode)     {         stringbuilder postdata = new stringbuilder();         postdata.append("grant_type=authorization_code");         postdata.appendformat("&code={0}", authorizationcode);         postdata.appendformat("&redirect_uri={0}", absolutereturnurl.endswith(returnurl.tostring(), stringcomparison.ordinalignorecase) ? httputility.urlencode(absolutereturnurl) : "");         postdata.appendformat("&client_id={0}", this._clientid);         postdata.appendformat("&client_secret={0}", this._clientsecret);          string response = "";         string accesstoken = "";          var webrequest = (httpwebrequest)webrequest.create(tokenendpoint);          webrequest.method = "post";         webrequest.contenttype = "application/x-www-form-urlencoded";          try         {             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();                 }             }              javascriptserializer deserializer = new javascriptserializer();             var userdata = deserializer.deserialize<dictionary<string, string>>(response);             accesstoken = (string)userdata["access_token"];         }         catch (exception)         {             return null;         }          return accesstoken;      }      public override authenticationresult verifyauthentication(httpcontextbase context, uri returnpageurl)     {          string code = context.request.querystring["code"];         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 email = userdata["emailaddress"];         string id = userdata["id"];          userdata["accesstoken"] = accesstoken;          return new authenticationresult(issuccessful: true, provider: this.providername, provideruserid: id, username: email, extradata: userdata);     } } } 

and reason oauthwebsecurity.verifyauthentication in function "externallogincallback" not going right class here workaround:

authenticationresult result = ((googlecustomclient)oauthwebsecurity.getoauthclientdata("google").authenticationclient).verifyauthentication(this.httpcontext, uri);