异步请求ddh,使用post请求，参数path=‘/data/home’

var url = 'https://www.ddh.com'
var path = '/data/home'

function ajax(url, path, method) {
  return new Promise(function(resolve, reject) {
    var xhr = new XMLHttpRequest()
    xhr.onreadystatechange = function() {
      if (xhr.readyState === 4) {
        if (xhr.status === 200) {
          resolve(xhr.responseText)
        } else {
          reject(xhr.status)
        }
      }
    }
    xhr.open(method, url + path, true)
    xhr.send()
  })
}

ajax(url, path, 'post').then(function(data) {
  console.log(data)
}, function(error) {
  console.log(error)
})