Request: Simplify apollo-client middleware

Right now we have to do something like this:

networkInterface.use([{
  applyMiddleware(request, next) {
    if (!request.options.headers) {
      request.options.headers = new Headers();
    }
    request.options.headers.Authorization = token;
    next();
  }
}]);

It would be much nicer to be able to provide regular functions to networkInterface.use rather than having to use applyMIddleware. Thoughts?

[czbaker]

@zimme: Exactly. When I was trying to figure out middleware, since I needed it for authorization in my current project, I looked to the Express middleware docs for help, as it was undocumented here.

I was super confused when I realized that it wasn’t the same, and that there was an applyMiddleware requirement that I was unaware of.

[helfer]

cc @DxCx @calebmer if we overhaul the network interface, we should keep this in mind. I’m closing it now since it’s an ancient issue.