grpc-js-reflection-client/examples/helloworld.js

Package use Grpc reflection api to download grpc proto descriptor. Now you don't have to add proto file to each package. Simple direct download proto package from example microservice without any files.

const { GrpcReflection } = require('grpc-js-reflection-client');
const grpc =  require('@grpc/grpc-js');

/**
 * Get proto descriptor from reflection grpc api and get in @grpc/grpc-js format
 *
 * */
try {
    (async()=>{
        // Connect with grpc server reflection
        const client = new GrpcReflection('0.0.0.0:50051', grpc.credentials.createInsecure());

        // Get services without proto file for specific symbol or file name
        const descriptor = await client.getDescriptorBySymbol('helloworld.Greeter');
        //const descriptor = await client.getDescriptorByFileName('examples/helloworld/helloworld/helloworld.proto');

        // Create package services
        const packageObject = descriptor.getPackageObject({
            keepCase: true,
            enums: String,
            longs: String
        });

        // Send request over grpc
        const proto = new packageObject.helloworld.Greeter(
            "localhost:50051",
            grpc.credentials.createInsecure(),
        );

        proto.SayHello({
            name: "abc"
        },(err,data)=>{
            if(err) {
                console.log(err);
            }else{
                console.log(data);
            }

        });
    })();
}catch(e){
    console.log(e);
}