Angularjs $http post file and form data

I have the below request in python

import requests, json, io

cookie = {}
payload = {"Name":"abc"}
url = "/test"
file = "out/test.json"

fi = {'file': ('file', open(file) )}
r = requests.post("http://192.168.1.1:8080" + url, data=payload, files=fi, cookies=cookie)
print(r.text)

which send a file, and form fields to the backend. How can I do the same (sending file + form fields) with Angular $http. Currently, I do like this, but not sure how to send the file too.

var payload = {"Name":"abc"};
$http.post('/test', payload)
    .success(function (res) {
    //success
});