如何在 FCM 中使用 Web 请求订阅特定主题

如何解决如何在 FCM 中使用 Web 请求订阅特定主题

这是代码。我试过这个，但它说请求不好。我没有其他想法。 我是通过使用 .net 网络表单来做到这一点的。

private static void RegisterTokensToTopic(List<String> registrationTokens)
        {
            WebRequest tRequest;
            tRequest = WebRequest.Create("https://fcm.googleapis.com/fcm/send/");
            tRequest.Method = "post";
            tRequest.ContentType = " application/json";
            tRequest.Headers.Add(string.Format("Authorization: key={0}",getServerKey()));
            var publicTopic = "all";
            var a = new
            {
                registrationTokens = registrationTokens,topic = publicTopic
            };

            byte[] byteArray = Encoding.UTF8.GetBytes(Newtonsoft.Json.JsonConvert.SerializeObject(a));
            tRequest.ContentLength = byteArray.Length;

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

            WebResponse tResponse = tRequest.GetResponse();
            dataStream = tResponse.GetResponseStream();

            StreamReader tReader = new StreamReader(dataStream);
            string sResponseFromServer = tReader.ReadToEnd();
            dynamic data = JObject.Parse(sResponseFromServer);

            tReader.Close();
            dataStream.Close();
            tResponse.Close();
        }