Send push to Android by C using FCM Firebase Cloud Messaging

Question

I am using this code to send notification message by C  with GCM  using Winforms  Webforms  whatever  Now I want to send to FCM  Firebase Cloud Messaging   Should I update my code     public class AndroidGCMPushNotification       public AndroidGCMPushNotification                               TODO  Add constructor logic here                      public string SendNotification string deviceId  string message                string SERVER API KEY    server api key                   var SENDER ID    application number           var value   message          WebRequest tRequest          tRequest   WebRequest Create  https   android googleapis com gcm send            tRequest Method    post           tRequest ContentType     application x-www-form-urlencoded charset UTF-8           tRequest Headers Add string Format  Authorization  key  0    SERVER API KEY             tRequest Headers Add string Format  Sender  id  0    SENDER ID             string postData    collapse key score update amp time to live 108 amp delay while idle 1 amp data message     value     amp data time     System DateTime Now ToString       amp registration id     deviceId               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              tReader Close            dataStream Close            tResponse Close            return sResponseFromServer            but the GCM was changed to FCM  Is this same code to send the notification  Where can I find the SERVER API KEY  Is the same solution

User · Answer

Based on Teste s code    I can confirm the following works  I can t say whether or not this is  good  code  but it certainly works and could get you back up and running quickly if you ended up with GCM to FCM server problems   public AndroidFCMPushNotificationStatus SendNotification string serverApiKey  string senderId  string deviceId  string message        AndroidFCMPushNotificationStatus result   new AndroidFCMPushNotificationStatus         try               result Successful   false          result Error   null           var value   message          WebRequest tRequest   WebRequest Create  https   fcm googleapis com fcm send            tRequest Method    post           tRequest ContentType    application x-www-form-urlencoded charset UTF-8           tRequest Headers Add string Format  Authorization  key  0    serverApiKey            tRequest Headers Add string Format  Sender  id  0    senderId             string postData    collapse key score update amp time to live 108 amp delay while idle 1 amp data message     value     amp data time     System DateTime Now ToString       amp registration id     deviceId                Byte   byteArray   Encoding UTF8 GetBytes postData           tRequest ContentLength   byteArray Length           using  Stream dataStream   tRequest GetRequestStream                          dataStream Write byteArray  0  byteArray Length                using  WebResponse tResponse   tRequest GetResponse                                  using  Stream dataStreamResponse   tResponse GetResponseStream                                          using  StreamReader tReader   new StreamReader dataStreamResponse                                                 String sResponseFromServer   tReader ReadToEnd                            result Response   sResponseFromServer                                                                            catch  Exception ex                result Successful   false          result Response   null          result Error   ex             return result      public class AndroidFCMPushNotificationStatus       public bool Successful               get          set             public string Response               get          set            public Exception Error               get          set

User · Answer

Yes  you should update your code to use Firebase Messaging interface  There s a GitHub Project for that here   using Stimulsoft Base Json  using System  using System Collections Generic  using System IO  using System Linq  using System Net  using System Text  using System Web   namespace  WEBAPP       public class FireBasePush               private string FireBase URL    https   fcm googleapis com fcm send           private string key server          public FireBasePush String Key Server                        this key server   Key Server                    public dynamic SendPush PushMessage message                        HttpWebRequest request    HttpWebRequest WebRequest Create FireBase URL               request Method    POST               request Headers Add  Authorization    key     this key server               request ContentType    application json               string json   JsonConvert SerializeObject message                 json   json Replace  content available    content-available                byte   byteArray   Encoding UTF8 GetBytes json               request ContentLength   byteArray Length              Stream dataStream   request GetRequestStream                dataStream Write byteArray  0  byteArray Length               dataStream Close                HttpWebResponse respuesta    HttpWebResponse request GetResponse                if  respuesta StatusCode    HttpStatusCode Accepted    respuesta StatusCode    HttpStatusCode OK    respuesta StatusCode    HttpStatusCode Created                                StreamReader read   new StreamReader respuesta GetResponseStream                     String result   read ReadToEnd                    read Close                    respuesta Close                    dynamic stuff   JsonConvert DeserializeObject result                    return stuff                            else                               throw new Exception  Ocurrio un error al obtener la respuesta del servidor      respuesta StatusCode                                       public class PushMessage               private string  to          private PushMessageData  notification           private dynamic  data          private dynamic  click action          public dynamic data                       get   return  data                set    data   value                       public string to                       get   return  to                set    to   value                      public PushMessageData notification                       get   return  notification                set    notification   value                       public dynamic click action                       get                               return  click action                             set                                click action   value                                     public class PushMessageData               private string  title          private string  text          private string  sound    default             private dynamic  content available          private string  click action          public string sound                       get   return  sound                set    sound   value                       public string title                       get   return  title                set    title   value                      public string text                       get   return  text                set    text   value                       public string click action                       get                               return  click action                             set                                click action   value

User · Answer

I write this code and It s worked for me    public static string ExcutePushNotification string title  string msg  string fcmToken  object data              var serverKey    AAAA                              var senderId    3333333333333             var result    -1            var httpWebRequest    HttpWebRequest WebRequest Create  https   fcm googleapis com fcm send            httpWebRequest ContentType    application json           httpWebRequest Headers Add string Format  Authorization  key  0    serverKey            httpWebRequest Headers Add string Format  Sender  id  0    senderId            httpWebRequest Method    POST             var payload   new                       notification   new                               title   title                  body   msg                  sound    default                              data   new                               info   data                            to   fcmToken              priority    high               content available   true                        var serializer   new JavaScriptSerializer             using  var streamWriter   new StreamWriter httpWebRequest GetRequestStream                           string json   serializer Serialize payload               streamWriter Write json               streamWriter Flush                       var httpResponse    HttpWebResponse httpWebRequest GetResponse            using  var streamReader   new StreamReader httpResponse GetResponseStream                           result   streamReader ReadToEnd                      return result

User · Answer

Try to send a json object  Replace this   tRequest ContentType     application x-www-form-urlencoded charset UTF-8       string postData    collapse key score update amp time to live 108 amp delay while idle 1 amp data message     value     amp data time     System DateTime Now ToString       amp registration id     deviceId               Console WriteLine postData           Byte   byteArray   Encoding UTF8 GetBytes postData     For this   tRequest ContentType    application json        var data   new                       to   deviceId              notification   new                               body    This is the message                   title    This is the title                   icon    myicon                                    var serializer   new JavaScriptSerializer            var json   serializer Serialize data            Byte   byteArray   Encoding UTF8 GetBytes json

User · Answer

Here is another approach of writing Notification Service inside ASP Net REST API   public async Task lt bool gt  NotifyAsync string to  string title  string body        try                  Get the server key from FCM console         var serverKey   string Format  key  0     Your server key - use app config                Get the sender id from FCM console         var senderId   string Format  id  0     Your sender id - use app config             var data   new                       to     Recipient device token             notification   new   title  body                          Using Newtonsoft Json         var jsonBody   JsonConvert SerializeObject data            using  var httpRequest   new HttpRequestMessage HttpMethod Post   https   fcm googleapis com fcm send                          httpRequest Headers TryAddWithoutValidation  Authorization   serverKey               httpRequest Headers TryAddWithoutValidation  Sender   senderId               httpRequest Content   new StringContent jsonBody  Encoding UTF8   application json                 using  var httpClient   new HttpClient                                  var result   await httpClient SendAsync httpRequest                    if  result IsSuccessStatusCode                                        return true                                    else                                          Use result StatusCode to handle failure                        Your custom error handler here                      logger LogError   Error sending notification  Status Code   result StatusCode                                                         catch  Exception ex                 logger LogError   Exception thrown in Notify Service   ex                return false      References   using Microsoft Extensions Configuration  using Microsoft Extensions Logging  using Newtonsoft Json  using System Net Http  using System Text  using System Threading Tasks

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firebase cloud messaging with c   working all  net platform  asp net   netmvc   netcore           WebRequest tRequest   WebRequest Create  https   fcm googleapis com fcm send            tRequest Method    post             serverKey - Key from Firebase cloud messaging server           tRequest Headers Add string Format  Authorization  key  0     AIXXXXXX                   Sender Id - From firebase project setting           tRequest Headers Add string Format  Sender  id  0     XXXXX               tRequest ContentType    application json           var payload   new                       to    e8EHtMwqsZY APA91bFUktufXdsDLdXXXXXX          XXXXXXXXXXXXXX               priority    high               content available   true              notification   new                               body    Test                   title    Test                   badge   1                            data   new                                key1    value1                   key2    value2                                     string postbody   JsonConvert SerializeObject payload  ToString            Byte   byteArray   Encoding UTF8 GetBytes postbody           tRequest ContentLength   byteArray Length          using  Stream dataStream   tRequest GetRequestStream                          dataStream Write byteArray  0  byteArray Length               using  WebResponse tResponse   tRequest GetResponse                                  using  Stream dataStreamResponse   tResponse GetResponseStream                                          if  dataStreamResponse    null  using  StreamReader tReader   new StreamReader dataStreamResponse                                                         String sResponseFromServer   tReader ReadToEnd                                  result Response   sResponseFromServer

User · Answer

You need change url from https   android googleapis com gcm send to https   fcm googleapis com fcm send and change your app library too  this tutorial can help you https   firebase google com docs cloud-messaging server implementing-http-connection-server-protocol

User · Answer

I have posted this answer as this question was viewed most and this server side code was written in VS 2015 in C  for sending push notification either single device based on device id or subscribed topic to Xamarin Android app   public class FCMPushNotification       public FCMPushNotification                    TODO  Add constructor logic here            public bool Successful               get          set             public string Response               get          set            public Exception Error               get          set               public FCMPushNotification SendNotification string  title  string  message  string  topic                FCMPushNotification result   new FCMPushNotification            try                       result Successful   true              result Error   null                var value   message              var requestUri    https   fcm googleapis com fcm send                WebRequest webRequest   WebRequest Create requestUri               webRequest Method    POST               webRequest Headers Add string Format  Authorization  key  0    YOUR FCM SERVER API KEY                webRequest Headers Add string Format  Sender  id  0    YOUR FCM SENDER ID                webRequest ContentType    application json                var data   new                                 to   YOUR FCM DEVICE ID     Uncoment this if you want to test for single device                to   topics    topic     this is for topic                  notification new                                       title  title                      body  message                        icon  myicon                                               var serializer   new JavaScriptSerializer                var json   serializer Serialize data                Byte   byteArray   Encoding UTF8 GetBytes json                webRequest ContentLength   byteArray Length              using  Stream dataStream   webRequest GetRequestStream                                  dataStream Write byteArray  0  byteArray Length                    using  WebResponse webResponse   webRequest GetResponse                                          using  Stream dataStreamResponse   webResponse GetResponseStream                                                  using  StreamReader tReader   new StreamReader dataStreamResponse                                                         String sResponseFromServer   tReader ReadToEnd                                result Response   sResponseFromServer                                                                                                     catch Exception ex                        result Successful   false              result Response   null              result Error   ex                    return result            and its uses     start sending push notification to apps                 FCMPushNotification fcmPush   new FCMPushNotification                                        fcmPush SendNotification  your notificatin title    Your body message   news                       end push notification

User · Answer

You can use this library  makes it seamless to send push notifications using Firebase Service from a C  backend download  here

User · Answer

I am using this approach and it is working fine    public class PushNotification         private static readonly ILog Logger   LogManager GetLogger System Reflection MethodBase GetCurrentMethod   DeclaringType              firebase      private static Uri FireBasePushNotificationsURL   new Uri  https   fcm googleapis com fcm send         private static string ServerKey   ConfigurationManager AppSettings  FIREBASESERVERKEY          public static async Task lt bool gt  SendPushNotification List lt SendNotificationModel gt  notificationData                  try                         bool sent   false                        foreach  var data in notificationData                                  var messageInformation   new Message                                           notification   new Notification                                                   title   data Title                           text   data Message                           ClickAction    FCM PLUGIN ACTIVITY                                                 data   data data                        priority  high                         to  data DeviceId                                      string jsonMessage   JsonConvert SerializeObject messageInformation                       Create request to Firebase API                  var request   new HttpRequestMessage HttpMethod Post  FireBasePushNotificationsURL                     request Headers TryAddWithoutValidation  Authorization    key     ServerKey                    request Content   new StringContent jsonMessage  Encoding UTF8   application json                      HttpResponseMessage result                   using  var client   new HttpClient                                            result   await client SendAsync request                        sent    result IsSuccessStatusCode                                                                  return sent                      catch Exception ex                          Logger Error ex                return false

User · Answer

Here s the code for server side firebase cloud request from C    Asp net  Please note that your client side should have same topic  e g   FirebaseMessaging getInstance   subscribeToTopic  news     public String SendNotificationFromFirebaseCloud         var result    -1       var webAddr    https   fcm googleapis com fcm send        var httpWebRequest    HttpWebRequest WebRequest Create webAddr       httpWebRequest ContentType    application json       httpWebRequest Headers Add  Authorization key     YOUR FIREBASE SERVER KEY       httpWebRequest Method    POST        using  var streamWriter   new StreamWriter httpWebRequest GetRequestStream                   string json       to       topics news     data       message      This is a Firebase Cloud Messaging Topic Message                   streamWriter Write json           streamWriter Flush               var httpResponse    HttpWebResponse httpWebRequest GetResponse        using  var streamReader   new StreamReader httpResponse GetResponseStream                   result   streamReader ReadToEnd               return result

User · Answer

public  SendNotice int deviceType  string deviceToken  string message  int badge  int status  string sound                AndroidFCMPushNotificationStatus result   new AndroidFCMPushNotificationStatus            try                       result Successful   false              result Error   null              var value   message              WebRequest tRequest   WebRequest Create  https   fcm googleapis com fcm send                tRequest Method    post               tRequest ContentType    application json               var serializer   new JavaScriptSerializer                var json                   tRequest Headers Add string Format  Authorization  key  0     AA                       tRequest Headers Add string Format  Sender  id  0     11                        if  DeviceType    2                                var body   new                                           to   deviceToken                        data   new                                                   custom notification   new                                                               title    Notification                                   body   message                                  sound    default                                   priority    high                                   show in foreground   true                                  targetScreen   notificationType    detail                                                                                                                      priority   10                                       json   serializer Serialize body                             else                               var body   new                                       to   deviceToken                      content available   true                      notification   new                                               title    Notification                           body   message                          sound    default                           show in foreground   true                                             data   new                                               targetScreen   notificationType                          id   0                                             priority   10                                    json   serializer Serialize body                              Byte   byteArray   Encoding UTF8 GetBytes json                tRequest ContentLength   byteArray Length               using  Stream dataStream   tRequest GetRequestStream                                  dataStream Write byteArray  0  byteArray Length                    using  WebResponse tResponse   tRequest GetResponse                                          using  Stream dataStreamResponse   tResponse GetResponseStream                                                  using  StreamReader tReader   new StreamReader dataStreamResponse                                                         String sResponseFromServer   tReader ReadToEnd                                result Response   sResponseFromServer                                                                                                    catch  Exception ex                        result Successful   false              result Response   null              result Error   ex

[c#] Send push to Android by C# using FCM (Firebase Cloud Messaging)

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