Android Question gRPC client

[advansis]

Hi guys,
I have a server (my own) responding to gRPC calls. It is done in C#/dotnetcore and works very well in desktop applications.
Cannot find anything in B4A to create a simple client (one rpc greeter would be enough).
Android supports it: a good starting point can be this: https://grpc.io/docs/quickstart/android/
But I have no ideas to port it in B4A.
Any example/clue/hint? Thanks

 

[DonManfred]

what api exactly are you trying to connect to?

 

[tigrot]

It seems a limited use package, as far as I understand(I'm not an english speaking), the package allows only connection over a USB cable,
If I where you I'd port the RPC of the server under a WEBSERVICE. Much easyer to port to B4A.

 

[advansis]

gRPC (https://grpc.io/) is a high-performance RPC framework. It is not limited and is open-source. The protocol can work over HPPTS and can send data and streams (sync and async). Visual Studio 2019 can be used to create gRPC server and client (by now, only in C#). The great thing is that it can be run under application servers, but also under Kestrel.
@DonManfred, I need to execute RPC calls (defined in a "Proto" definition file)
Thanks

 

[DonManfred]

@DonMafred, I need to execute RPC calls (defined in a "Proto" definition file)

My username is DonManfred.

There is no lib for gprc in b4a.

Again: What Api EXACTLY are you trying to access?? <--- !

You probably can call this api using okhttputils2 (without the need for a GPRC library).

 

[advansis]

there is no lib for gprc in b4a.

Again: What Api EXACTLY are you trying to access???? <--- !!!
You probably can call this api using okhttputils2.

Of course I can call API with okhttputils, https://mvnrepository.com/artifact/io.grpc/grpc-okhttp
but the protocol inside is not as easy as it seems (data are 7bit long and is used a compression algorithm).

I have my own gRPC server with my own greeters. A call can be this (in Java):

try {
    HelloRequest message = HelloRequest.newBuilder().setName(mMessage).build();
    HelloReply reply = stub.sayHello(message);
    reply = stub.sayHelloAgain(message);
} catch (Exception e) {
    StringWriter sw = new StringWriter();
    PrintWriter pw = new PrintWriter(sw);
    e.printStackTrace(pw);
    pw.flush();
    return "Failed... : " + System.lineSeparator() + sw;
}

This is the Proto definition:

// The greeting service definition.
service Greeter {
  // Sends a greeting
  rpc SayHello (HelloRequest) returns (HelloReply) {}
  // Sends another greeting
  rpc SayHelloAgain (HelloRequest) returns (HelloReply) {}
}

// The request message containing the user's name.
message HelloRequest {
  string name = 1;
}

// The response message containing the greetings
message HelloReply {
  string message = 1;
}

I realized there's no library in B4A, but Android has. I asked if someone have already translated the java libraries (even partially, I can improve and publish all the code).
I don't know how to start and include/call such libraries...

@DonManfred , in your FireBase library (https://www.b4x.com/android/forum/threads/firebase-cloud-firestore.105067/#content) you already use such libraries...

Thank you

 

[DonManfred]

you already use such libraries...

not really.
It is used internally by the Firebaseartifacts.