jsonp请求数据

借助jsonp开源库获取数据,因为要多处用到，所以先自己封装一个jsonp

import originJSONP from 'jsonp'
export default function jsonp(url, data, option) {
  url += (url.indexOf('?') < 0 ? '?' : '&') + param(data)
  return new Promise((resolve, reject) => {
    originJSONP(url, option, (err, data) => {
      if (!err) {
        resolve(data)
      } else {
        reject(err)
      }
    })
  })
}

function param(data) {
  var url = ''
  for (var k in data) {
    let value = data[k] !== undefined ? data[k] : ''
    url += `&${k}=${encodeURIComponent(value)}`
  }
  return url ? url.substring(1) : ''
}

举个例子：

import jsonp from 'common/js/jsonp'

const commonParams = {
  g_tk: 1854375149,
  inCharset: 'utf-8',
  outCharset: 'utf-8',
  notice: 0,
  format: 'jsonp'
}

const options = {
  param: 'jsonpCallback'
}

export function getTopList() {
  const url = 'https://c.y.qq.com/v8/fcg-bin/fcg_myqq_toplist.fcg'
  const data = Object.assign({}, commonParams, {
    platform: 'h5',
    needNewCode: 1,
    g_tk: 1121516795,
    notice: 0
  })
  return jsonp(url, data, options)
}