微信小程序 wx.request 封装

app.js

App({
  /**
   * [request description]
   * @param  {[type]} method [description]
   * @param  {[type]} url    [description]
   * @param  {[type]} data   [description]
   * @param  {[type]} header [description]
   * @return {[type]}        [description]
   */
  request: function(method, url, data, header){
    if(typeof method === 'object'){
      url    = method.url;
      data   = method.data;
      header = method.header;
      method = method.method;
    }
    var req = {
      method: method,
      url   : url,
      header: {},
      data  : {}
    }, def = {
      header: function(name, value){
        if(value) req.header[ name ] = value;
        else req.header = name;
        return def;
      },
      query: function(name, value){
        if(value) req.data[ name ] = value;
        else req.data = name;
        return def;
      },
      send: function(name, value){
        if(value) req.data[ name ] = value;
        else req.data = name;
        return def;
      },
      use: function(middleware){
        req = middleware.call(def, req);
        return def;
      },
      end: function(callback, done){
        var p = new Promise(function(accept, reject){
         if(!callback){
          wx.showNavigationBarLoading();
          callback = function(err, res){
            wx.hideNavigationBarLoading();
            if(err) return reject(err);
            else accept(res);
          };
         }
        });
        if(!req.header['content-type']){
          req.header['content-type'] = req.method == 'get' ?
          'application/x-www-form-urlencoded' : 'application/json';
        }
        req.complete = done;
        req.fail     = callback;
        req.success  = callback.bind(req, null);
        wx.request(req);
        return p;
      }
    };
    'get post put delete'.split(' ').forEach(function(method){
      def[ method ] = (function(){
        return function(url){
          req.url    = req.url    || url;
          req.method = req.method || method;
          return def;
        };
      })();
    });
    return def;
  }
});

page.js

const app = getApp();

Page({

  data: {
    list: [],
  },

  onLoad: function () {
    var self = this;
    app.request()
    .get('https://api.lsong.org/ip/all')
    .query({ name: 'test' })
    .end()
    .then(function(res){
      self.setData({ list: res.data });
    });
  }
});