gRPC Node.js server-side cancel

[ikcge...@gmail.com]

Hey gRPC team, my name's Ian! Super excited about this technology, but have been running into a few difficulties implementing in Node.js. Here's one that has been stumping me:

I have a server-side streaming service-method on the client.

const numberStream = stub.streamNumbers(
  { number: 5 },
  meta,
  {
    interceptors: [interceptorProvider]
  },
  {}
);

When I cancel the method from the client with...

numberStream.cancel()

My client side interceptor detects a cancelled event. But my server remains unaware of the cancellation.

The cancelled property remains "false", and my event listener for

call.on("cancelled",()=>{


})

does not fire. Any chance someone might know where my problem lies?

(snippet from server side streaming service method)

function streamNumbers(call) {


  call.on("cancelled", () => {
    console.log("cancelled");
    call.end();
  });


  console.log(call.__proto__.__proto__);


}

[Thomas Mercier]

Not sure if this is your issue, but I am convinced the IsCancelled feature is broken in core: https://github.com/grpc/grpc/issues/18929