微信小程序网络请求封装示例

// 官方例子
wx.request({
 url: 'test.php', //仅为示例，并非真实的接口地址
 data: {
   x: '' ,
   y: ''
 },
 header: {
   'content-type': 'application/json' // 默认值
 },
 success: function(res) {
  console.log(res.data)
 }
})

const baseUrl = 'https://api.it120.cc';

const http = ({ url = '', param = {}, ...other } = {}) => {
  wx.showLoading({
    title: '请求中，请耐心等待..'
  });
  let timeStart = Date.now();
  return new Promise((resolve, reject) => {
    wx.request({
      url: getUrl(url),
      data: param,
      header: {
        'content-type': 'application/json' // 默认值 ,另一种是 "content-type": "application/x-www-form-urlencoded"
      },
      ...other,
      complete: (res) => {
        wx.hideLoading();
        console.log(`耗时${Date.now() - timeStart}`);
        if (res.statusCode >= 200 && res.statusCode < 300) {
          resolve(res.data)
        } else {
          reject(res)
        }
      }
    })
  })
}

const getUrl = (url) => {
  if (url.indexOf('://') == -1) {
    url = baseUrl + url;
  }
  return url
}

// get方法
const _get = (url, param = {}) => {
  return http({
    url,
    param
  })
}

const _post = (url, param = {}) => {
  return http({
    url,
    param,
    method: 'post'
  })
}

const _put = (url, param = {}) => {
  return http({
    url,
    param,
    method: 'put'
  })
}

const _delete = (url, param = {}) => {
  return http({
    url,
    param,
    method: 'put'
  })
}
module.exports = {
  baseUrl,
  _get,
  _post,
  _put,
  _delete
}

const api = require('../../utils/api.js')

// 单个请求
api.get('list').then(res => {
 console.log(res)
}).catch(e => {
 console.log(e)
})

// 一个页面多个请求
Promise.all([
 api.get('list'),
 api.get(`detail/${id}`)
]).then(result => {
 console.log(result)
}).catch(e => {
 console.log(e)
})

//app.js
App({
 onLaunch: function () {
  console.log('App onLaunch');
  var that = this;
  // 获取商城名称
  wx.request({
   url: 'https://api.it120.cc/'+ that.globalData.subDomain +'/config/get-value',
   data: {
    key: 'mallName'
   },
   success: function(res) {
    wx.setStorageSync('mallName', res.data.data.value);
   }
  })
  this.login();
  this.getUserInfo();
 },
 login : function () {
  var that = this;
  var token = that.globalData.token;
  // 如果有token
  if (token) {
   // 检查token是否有效
   wx.request({
    url: 'https://api.it120.cc/' + that.globalData.subDomain + '/user/check-token',
    data: {
     token: token
    },
    success: function (res) {
     // 如果token失效了
     if (res.data.code != 0) {
      that.globalData.token = null;
      that.login(); // 重新登陆
     }
    }
   })
   return;
  }

  // 【1】调用微信自带登陆
  wx.login({
   success: function (res) {
    // 【2】 拿到code去访问我们的后台换取其他信息
    wx.request({
     url: 'https://api.it120.cc/'+ that.globalData.subDomain +'/user/wxapp/login',
     data: {
      code: res.code
     },
     success: function(res) {
      // 如果说这个code失效的
      if (res.data.code == 10000) {
       // 去注册
       that.registerUser();
       return;
      }
      // 如果返回失败了
      if (res.data.code != 0) {
       // 登录错误 
       wx.hideLoading();
       // 提示无法登陆
       wx.showModal({
        title: '提示',
        content: '无法登录，请重试',
        showCancel:false
       })
       return;
      }
      
      // 【3】 如果成功后设置token到本地
      that.globalData.token = res.data.data.token;
      // 保存用户信息
      wx.setStorage({
       key: 'token',
       data: res.data.data.token
      })
     }
    })
   }
  })
 },
 // 注册？？ [这个看需求]
 registerUser: function () {
  var that = this;
  wx.login({
   success: function (res) {
    var code = res.code; // 微信登录接口返回的 code 参数，下面注册接口需要用到
    wx.getUserInfo({
     success: function (res) {
      var iv = res.iv;
      var encryptedData = res.encryptedData;
      // 下面开始调用注册接口
      wx.request({
       url: 'https://api.it120.cc/' + that.globalData.subDomain +'/user/wxapp/register/complex',
       data: {code:code,encryptedData:encryptedData,iv:iv}, // 设置请求的 参数
       success: (res) =>{
        wx.hideLoading();
        that.login();
       }
      })
     }
    })
   }
  })
 },
 // 获取用户信息
 getUserInfo:function() {
  wx.getUserInfo({
   success:(data) =>{
    this.globalData.userInfo = data.userInfo;
    wx.setStorage({
     key: 'userInfo',
     data: data.userInfo
    })
    return this.globalData.userInfo;
   }
  })
 },
 globalData:{
  userInfo:null,
  subDomain:"34vu54u7vuiuvc546d",
  token: null
 }
})

 getUserInfo: function () {
  // 先调用wx.getSetting 获取用户权限设置
  wx.getSetting({
   success(res) {
    console.log('1');
    if (!res.authSetting['scope.userInfo']) {
     wx.authorize({
      scope: 'scope.userInfo',
      success() {
       // 用户已经同意小程序使用录音功能，后续调用 wx.getUserInfo接口不会弹窗询问
       wx.getUserInfo({
        success: (data) => {
         this.globalData.userInfo = data.userInfo;
         wx.setStorage({
          key: 'userInfo',
          data: data.userInfo
         })
         return this.globalData.userInfo;
        }
       })
      }
     })
    } else {
     console.log(2);
    }
   }
  })

 },