Android Question Firebase Push Notification - integration with ASP.NET

[Alex_197]

Hi all.

I want to integrate the Firebase Push Notification with my asp,net website. But from what I read so far is that the token generated by B4J GetTokenValue is valid for 1 hour only.
So if I start B4J sending tool and copy the token string from there and use it in my asp.net this token will expire in 1 hour.

Is there any options to either convert GetTokenValue to vb.net /c# or to pass some parameters into B4J project?

 

[Erel]

or to pass some parameters into B4J project?

What exactly do you mean?

 

[DonManfred]

or to pass some parameters into B4J project?

The given parameters are in Args.

Sub AppStart (Form1 As Form, Args() As String)
...
End sub

I can´t help you with code in vb.net /c# to start an app and give parameters.

In Delphi i use

    OpenProgram2('"C:\Java\jdk-11.0.1\bin\javaw.exe"',tempdir,'--module-path C:\Java\jdk-11.0.1\javafx\lib --add-modules ALL-MODULE-PATH -jar \\192.168.2.252\jars\UnternehmerErklaerung.jar '+IntToStr(abnr)+'');

where IntToStr(abnr) is ust the string-interpretion of abnr (int).

You can add more parameters.

OpenProgram2 is just a helper-sub around ShellExecute

procedure OpenProgram2(prog, path, params: string);
var
  c, p, dir: array[0..800] of Char;
begin
  StrPCopy(c, prog);
  StrPCopy(p, params);
  StrPCopy(dir, path);
  ShellExecute(0, 'open', c, p, dir, SW_NORMAL);
end;

 

[Alex_197]

The given parameters are in Args.

Sub AppStart (Form1 As Form, Args() As String)
...
End sub

I can´t help you with code in vb.net /c# to start an app and give parameters.

In Delphi i use

    OpenProgram2('"C:\Java\jdk-11.0.1\bin\javaw.exe"',tempdir,'--module-path C:\Java\jdk-11.0.1\javafx\lib --add-modules ALL-MODULE-PATH -jar \\192.168.2.252\jars\UnternehmerErklaerung.jar '+IntToStr(abnr)+'');

where IntToStr(abnr) is ust the string-interpretion of abnr (int).

You can add more parameters.

OpenProgram2 is just a helper-sub around ShellExecute

procedure OpenProgram2(prog, path, params: string);
var
  c, p, dir: array[0..800] of Char;
begin
  StrPCopy(c, prog);
  StrPCopy(p, params);
  StrPCopy(dir, path);
  ShellExecute(0, 'open', c, p, dir, SW_NORMAL);
end;

Thanks, That's what I need.

 

[Alex_197]

What exactly do you mean?

I'm asking - is it possible to convert into C# or VB/NET this code

Private Sub GetTokenValue (FilePath As String) As String
    Dim GoogleCredentials As JavaObject
    GoogleCredentials.InitializeStatic("com.google.auth.oauth2.GoogleCredentials")
    Dim Credentials As JavaObject = GoogleCredentials.RunMethodJO("fromStream", Array(File.OpenInput(FilePath, ""))) _
        .RunMethod("createScoped", Array(Array As String("https://www.googleapis.com/auth/firebase.messaging")))
    Credentials.RunMethod("refreshIfExpired", Null)
    Return Credentials.RunMethodJO("getAccessToken", Null).RunMethod("getTokenValue", Null)
End Sub

I need to send messages from my asp.net website.

 

[Erel]

I guess that it is possible. You need to go over Google documentation and find whether they provide asp.net SDK and follow their instructions.

 

[Alex_197]

I guess that it is possible. You need to go over Google documentation and find whether they provide asp.net SDK and follow their instructions.

Thank you. I will check it, But what if they don't have asp.net SDK?

 

[Erel]

Then use B4J.

 

[Erel]

You can also create a B4J console app and run it from your server whenever you need to send a message.

 

[Alex_197]

You can also create a B4J console app and run it from your server whenever you need to send a message.

Thank you. Good idea.

 

[LucaMs]

https://firebase.google.com/docs/reference/fcm/rest

 

[tznikos]

Hi, when run the code with the function GetTokenValue, getting the following error

    GoogleCredentials.InitializeStatic("com.google.auth.oauth2.GoogleCredentials")

java.lang.ClassNotFoundException: com.google$auth$oauth2$GoogleCredentials
Running from B4J
Any idea why?

 

[DonManfred]

Hi, when run the code with the function GetTokenValue, getting the following error

You are posting in the WRONG thread
Posting to an existing thread is a mistake. Especially when the thema is a totally other one.

You should ALWAYS create a new Thread for your Issue.

PD: You probably forget to implement

#AdditionalJar: google-auth-library-oauth2-http-1.18.0.jar
#AdditionalJar: google-auth-library-credentials-1.18.0.jar
#AdditionalJar: guava-23.0.jar
#AdditionalJar: google-http-client-1.43.3.jar
#AdditionalJar: google-http-client-gson-1.43.3.jar
#AdditionalJar: gson-2.10.1.jar
#AdditionalJar: opencensus-api-0.31.1.jar
#AdditionalJar: opencensus-contrib-http-util-0.31.1.jar
#AdditionalJar: grpc-context-1.27.2.jar
#PackagerProperty: AdditionalModuleInfoString = uses com.google.auth.http.HttpTransportFactory;

in your project.

 

[tznikos]

Alex here is your solution

Imports System.IO
Imports Google.Apis.Auth.OAuth2
Class Firebase

    Public Function GetToken() As String
        Dim fileName As String = "your file.json"
        Dim scopes As String = "https://www.googleapis.com/auth/firebase.messaging"
        Dim bearertoken As String
        Using stream As New FileStream(fileName, FileMode.Open, FileAccess.Read)
            Dim credential As GoogleCredential = GoogleCredential.FromStream(stream).CreateScoped(scopes)
            bearertoken = credential.UnderlyingCredential.GetAccessTokenForRequestAsync().Result
        End Using
        Return bearertoken
    End Function
End Class

Find from Nuget the library Google.Apis.Auth.OAuth2

 

[hatzisn]

Thank you. Good idea.

Alternatively you can create a B4J web app including the B4J sending tool and post a json to the web app in a handler.

 

[ddefrain]

Hi all.

I want to integrate the Firebase Push Notification with my asp,net website. But from what I read so far is that the token generated by B4J GetTokenValue is valid for 1 hour only.
So if I start B4J sending tool and copy the token string from there and use it in my asp.net this token will expire in 1 hour.

Is there any options to either convert GetTokenValue to vb.net /c# or to pass some parameters into B4J project?

Firebase Notifications C#
There you go @Alex_197

Note: If you handle a topic you don't need to use/send the FCM Token id; I mean send the topic instead of.
And Yes Google Do that for security reasons the bearertoken lasts only one hour that's why you need to create a new one

Extract of modified code

public class Message {

  public string token {
    get;
    set;
  }

  public Data data {
    get;
    set;
  }

  public Notification notification {
    get;
    set;
  }

  public string topic {
    get;
    set;
  }



}

Root rootObj = new Root();
  rootObj.message = new Message();

  //rootObj.message.token = "cEM68BIdTomaE0R2dbaO:APA91bG8XfOjU_GSPNQYCrJ4wzE7VmMPEsyudwtE41VWKzJcoT2f3wbKsKCHwk5s078ZL31mM258-BzdZPRNXAlc_fyzCzj2txLQvQ3u7jggDPHjYIMlHRgspXT0CudfK"; //FCM Token id
 
  rootObj.message.data = new Data();
  rootObj.message.data.title = "Data Title";
  rootObj.message.data.body = "Data Body";
  rootObj.message.data.key_1 = "Sample Key";
  rootObj.message.data.key_2 = "Sample Key2";
  rootObj.message.notification = new Notification();
  rootObj.message.notification.title = "Notify Title";
  rootObj.message.notification.body = "Notify Body";
  rootObj.message.topic = "general";

Hope it helps!

 

[ddefrain]

Firebase Notifications C#
There you go @Alex_197

Note: If you handle a topic you don't need to use/send the FCM Token id; I mean send the topic instead of.
And Yes Google Do that for security reasons the bearertoken lasts only one hour that's why you need to create a new one

Extract of modified code

public class Message {

  public string token {
    get;
    set;
  }

  public Data data {
    get;
    set;
  }

  public Notification notification {
    get;
    set;
  }

  public string topic {
    get;
    set;
  }



}

Root rootObj = new Root();
  rootObj.message = new Message();

  //rootObj.message.token = "cEM68BIdTomaE0R2dbaO:APA91bG8XfOjU_GSPNQYCrJ4wzE7VmMPEsyudwtE41VWKzJcoT2f3wbKsKCHwk5s078ZL31mM258-BzdZPRNXAlc_fyzCzj2txLQvQ3u7jggDPHjYIMlHRgspXT0CudfK"; //FCM Token id
 
  rootObj.message.data = new Data();
  rootObj.message.data.title = "Data Title";
  rootObj.message.data.body = "Data Body";
  rootObj.message.data.key_1 = "Sample Key";
  rootObj.message.data.key_2 = "Sample Key2";
  rootObj.message.notification = new Notification();
  rootObj.message.notification.title = "Notify Title";
  rootObj.message.notification.body = "Notify Body";
  rootObj.message.topic = "general";

Hope it helps!

it will return a response like this