vue-resouce怎么设置请求头

var vm = new Vue({
 el:'#rrapp',
 data:{
 showList: true,
 title: null
 },
 http: {
 root: '/',
 headers: {
 token: token
 }
 }
})

Vue.http.headers.common['token'] = 'YXBpOnBhc3N3b3Jk';

Vue.http.interceptors.push((request, next) => {
 request.headers.set('token', token); //setting request.headers
 next((response) => {
 return response
 })
})

Vue.http.interceptors.push((request,next)=>{
 //request.credentials = true; // 接口每次请求会跨域携带cookie
 //request.method= 'POST'; // 请求方式（get,post）
 //request.headers.set('token','111') // 请求headers携带参数
 next(function(response){
 return response;
 });
})