access Token Linked In authentication user data ASP.Net LinkedIn API RSS

• • Reply
  SyedAzy

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  3 Posts

  access Token Linked In authentication user data ASP.Net LinkedIn API

  Mar 09, 2020 07:17 AM|SyedAzy|LINK

  Well After a long search in google I having to post the very old issue here , Please tell me where I am doing mistake my all code working fine till access token

  I am receiving access token successfully but the issue when I send access token to get user details 

  here is my code 

    protected void btnlogin_Click(object sender, EventArgs e)
          {
              System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
  
  
  string LinkedInurl = "https://www.linkedin.com/uas/oauth2/authorization?response_type=code&client_id=" + LinkiedClientID + "&scope=r_basicprofile%20r_emailaddress&state=DCEEFWF45453sdffef424&redirect_uri=" + redirection_url + "";
              
       Response.Redirect(LinkedInurl);
          }

  On another page load

        protected void Page_Load(object sender, EventArgs e)
          {
  
              System.Net.ServicePointManager.SecurityProtocol = System.Net.SecurityProtocolType.Tls12;
  
              if (!IsPostBack)
              {
                  if (Request.QueryString["code"] != null)
                  {
                      ///GetToken(Request.QueryString["code"].ToString());
                      GetLinkedToken(Request.QueryString["code"].ToString());
  
  
  
  
                  }
              }
          }

  public void GetLinkedToken(string code)
          {
  
          
  
              string authUrl = "https://www.linkedin.com/uas/oauth2/accessToken";
  
              var sign = "grant_type=authorization_code" + "&code=" + code + "&redirect_uri=" + HttpUtility.HtmlEncode(redirection_url) + "&client_id=" + LinkiedClientID + "&client_secret=" + LinkiedClientPass;
              // var postData = String.Format("grant_type=authorization_code&code={0}&redirect_uri={1}&client_id={2}&client_secret={3}", code, HttpUtility.HtmlEncode(redirectUrl), apiKey, apiSecret);
  
              HttpWebRequest webRequest = WebRequest.Create(authUrl + "?" + sign) as HttpWebRequest;
              webRequest.Method = "POST";
              webRequest.ContentType = "application/x-www-form-urlencoded";
  
              Stream dataStream = webRequest.GetRequestStream();
  
              String postData = String.Empty;
              byte[] postArray = Encoding.ASCII.GetBytes(postData);
  
              dataStream.Write(postArray, 0, postArray.Length);
              dataStream.Close();
  
              WebResponse response = webRequest.GetResponse();
              dataStream = response.GetResponseStream();
  
  
              StreamReader responseReader = new StreamReader(dataStream);
  
              string responseFromServer=   responseReader.ReadToEnd().ToString();
          
          JavaScriptSerializer js = new JavaScriptSerializer();
              Tokenclass obj = js.Deserialize<Tokenclass>(responseFromServer);
              GetLinkeduserProfile(obj.access_token);
  
               
          }

  ---Till here code is working perfectly but in GetLinkeduserProfile(obj.access_token); I am recieving errors 

  some time The remote server returned an error: (401) Unauthorized.

  and some time 403

   public void GetLinkeduserProfile(string accesstoken)
          {
  string url = "https://api.linkedin.com/v1/people/firstName/?xoauth_oauth2_access_token=" + accesstoken + "&format=json";
  
  
  
  HttpWebRequest webRequest = WebRequest.Create(url) as HttpWebRequest;
              webRequest.Method = "POST";
              webRequest.ContentType = "application/x-www-form-urlencoded";
  
              Stream dataStream = webRequest.GetRequestStream();
  
              String postData = String.Empty;
              byte[] postArray = Encoding.ASCII.GetBytes(postData);
  
              dataStream.Write(postArray, 0, postArray.Length);
              dataStream.Close();
  
              WebResponse response = webRequest.GetResponse();
              dataStream = response.GetResponseStream();
  
  
              StreamReader responseReader = new StreamReader(dataStream);
              string responseFromServer = responseReader.ReadToEnd();
              responseReader.Close();
              response.Close();
              JavaScriptSerializer js = new JavaScriptSerializer();
              Userclass userinfo = js.Deserialize<Userclass>(responseFromServer);
              imgprofile.ImageUrl = userinfo.picture;
              lblid.Text = userinfo.id;
              lblgender.Text = userinfo.gender;
              lbllocale.Text = userinfo.locale;
              lblname.Text = userinfo.name;
              hylprofile.NavigateUrl = userinfo.link;
              hylprofile.Text = userinfo.email;
  
  
  
          }

  Please Experts , Help me and tell me where I am making mistake 

• • Reply
  jiadongm

  Participant

  1320 Points

  491 Posts

  Re: access Token Linked In authentication user data ASP.Net LinkedIn API

  Mar 10, 2020 06:26 AM|jiadongm|LINK

  Hi SyedAzy,

  Version 1.0 of Linked In API is no longer supported since May 1, 2019. You may use v2 instead.

  The Authorization Code Flow has the following steps:

  1. Configure your application to get the Client ID and Client Secret.
  2. Your application directs the browser to LinkedIn's OAuth 2.0 authorization page where the member authenticates. After authentication, LinkedIn's authorization server passes an authorization code to your application.
  3. Your application sends this code to LinkedIn and LinkedIn returns an access token.
  4. Your application uses this token to call APIs, including an Authorization header in the HTTP call to LinkedIn's API.

  For more details, refer to the document:

  https://docs.microsoft.com/en-us/linkedin/shared/authentication/authorization-code-flow?context=linkedin/context#step-1-configure-your-application

  Best Regards,

  Jiadong Meng

  .NET forums are moving to a new home on Microsoft Q&A, we encourage you to go to Microsoft Q&A for .NET for posting new questions and get involved today.
• • Reply
  SyedAzy

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  3 Posts

  Re: access Token Linked In authentication user data ASP.Net LinkedIn API

  Mar 18, 2020 06:07 AM|SyedAzy|LINK

  Well the link you posted is very helpful but it resolve by simple step.

  I just changed the following request below to get the user detail and all is working fine.  

  https://api.linkedin.com/v2/people/me/?oauth2_access_token

  https://api.linkedin.com/v2/emailAddress?q=members&projection=(elements*(handle~))&oauth2_access_token=

  but in the end , I want to thanks because your diverted link was very helpful.