[Features] Node client support Promise

[leaves4j]

Can we support client return a Promise?

client.sayHello({name: user})
.then(res => {
  console.log('Greeting:', res.message);
})
.catch(err => throw err);

[sulliwane]

The Node API for GRPC is only callback based. But you can use promisifyAll() from bluebird library to create a promised based version of your grpc methods:

const bluebird = require('bluebird');
// Cb style
const clientCb = require('grpc').client;
clientCb({}, function cb(result) {});
// Promise style
const client = bluebird.promisifyAll(client);
client.sayHelloAsync({}).then((result) => {});

[leaves4j]

@sulliwane Thanks, I write a simple module that support both callback based and Promise, called grpc-promisify

[murgatroid99]

I want to note that your grpc-promisify only works with single request/single response methods. With other types of methods, it will pass the wrong arguments and overwrite important information in the return value.

[leaves4j]

@murgatroid99 tks