var HOST = 'http://localhost/lendoo/public/index.php/';
// 网站请求接口，统一为post
function post(req) { 
//发起网络请求
 wx.request({
 url: HOST + req.uri, 
 data: req.param, 
 header: {
   "content-type": "application/x-www-form-urlencoded"
 },
 method: 'POST', 
 success: function (res) {
  req.success(res.data)
 }, 
 fail: function (res) {
   console.log(res);
 }
 })
}
// 导出模块
module.exports = { post: post
}

var http = require('../../utils/http.js');
...
 http.post({ 
  uri: http.orderListUri, 
  param: {
   third_session: wx.getStorageSync('third_session')
  },  
   success: function (data) {
   that.setData({
    orderList: data
  });
  }
 });

header: {
   "content-type": "application/x-www-form-urlencoded"
  },
method: 'POST'