GCM Server ( The remote server returned an error: (401) Unauthorized.)

Question

I have been working over GCM Server in .net but I am unable to post data to server and always getting this error .

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

The asp.net code is mentioned below.

        string regId = "xxxx1bER6XXjuEhxxxxxxxxxxxxxxxxxxxxxf_thTnR7CSxxxxxxqX60-jxxxN55xxxxK074AaV9M09jP2xxxxu28aXXrd6ltxxxxxxhvmVt-nxxfw";


          var applicationID = "AIzaxxxxxt6fJx5txxxxxx";



            var SENDER_ID = "x8xxxxxx030x";
            var value = Text1.Text;
            WebRequest tRequest;
            tRequest = WebRequest.Create("https://android.googleapis.com/gcm/send");
            tRequest.UseDefaultCredentials = true;
            tRequest.Credentials = System.Net.CredentialCache.DefaultNetworkCredentials;
            tRequest.Method = "post";
            tRequest.ContentType = " application/x-www-form-urlencoded;charset=UTF-8";
            tRequest.Headers.Add(string.Format("Authorization: key={0}", applicationID));

            tRequest.Headers.Add(string.Format("Sender: id={0}", SENDER_ID));

             //Data_Post Format
             // string postData = "{'collapse_key' : 'demo', 'registration_id': [ '" + regId + "' ], 
              //'data': {'message': '" + Label1.Text + "'},'time_to_live' : '3' }";


            string postData = "collapse_key=score_update&time_to_live=108&delay_while_idle=1&data.message="
                + value + "&data.time=" + System.DateTime.Now.ToString() + "&registration_id=" + regId + "";


            Console.WriteLine(postData);
            Byte[] byteArray = Encoding.UTF8.GetBytes(postData);
            tRequest.ContentLength = byteArray.Length;

            Stream dataStream = tRequest.GetRequestStream();
            dataStream.Write(byteArray, 0, byteArray.Length);
            dataStream.Close();

            WebResponse tResponse = tRequest.GetResponse();

            dataStream = tResponse.GetResponseStream();

            StreamReader tReader = new StreamReader(dataStream);

            String sResponseFromServer = tReader.ReadToEnd();

            Label3.Text = sResponseFromServer; //printing response from GCM server.
            tReader.Close();
            dataStream.Close();
            tResponse.Close();

I have entered right credentials but still the error exists . I am stuck with this scenario for two days now , please help me regarding GCM Server in .NET WCF . Thanks

Answer 1

打开firebase控制台，然后在firbase中导入Google项目，然后单击设置并下载“ google-services.json”，使用服务器密钥作为api密钥，然后运行android app并生成注册ID，然后发送通知即可