[Question] How to access all http response headers with interceptor or other?

[kybetter]

e.g:

import { FooPromiseClient } from './fooService_grpc_web_pb';

const myInterceptor = function () {}

myInterceptor.prototype.intercept = function (request, invoker) {
  return invoker(request).then((response) => {
    return response;
  });
}

const fooService = new FooPromiseClient('http://xxx.xxx', {}, {
   'unaryInterceptors': [new myInterceptor()]
});

fooService.foo(someRequest).then(response => {
  // I only got empty metadata here, how to access all http response headers? 
})

[stanley-cheung]

e.g:

import { FooPromiseClient } from './fooService_grpc_web_pb';

const myInterceptor = function () {}

myInterceptor.prototype.intercept = function (request, invoker) {
  return invoker(request).then((response) => {
    # you can access the initial metadata here: response.getMetadata()
    # you can access the trailing metadata here: response.getStatus().metadata
    return response;
  });
}

Basically, you have to access the metadata in the interceptor itself, not after it has already returned. See this unit test as an example.