uniapp+egg.js获取微信步数(wx.getWeRunData)

uniapp

1. 调用uni.login()获取code

2. 调用wx.getWeRunData()获取encryptedData、iv

3. 请求后端接口，传递code、encryptedData、iv参数

   created() {
   			let copyThis = this;
   			// 调用微信登录方法获取code
   			uni.login({
   				provider: 'weixin',
   				success(res) {
   					//调用微信步数接口获取(encryptedData、iv)
   					wx.getWeRunData({
   						success(res2){
   							//调用后端接口,传递参数
   							uni.request({
   								url: 'http://127.0.0.1:7001',
   								data: {
   									code: res.code,
   									encryptedData:res2.encryptedData,
   									iv:res2.iv
   								},
   								success(res3) {
   									let {date,step} = res3.data.data;
   									copyThis.opts2.title.name = step[step.length-1].toString();
   									copyThis.chartData.categories = date;
   									copyThis.chartData.series[0].data = step;
   									copyThis.chartsShow =  true;
   								}
   							})
   						}
   					})
   				}
   			});
   		}

   egg.js

4. 获取前端传递过来的参数

5. 去小程序开发平台拿到appId、AppSecret

6. 请求微信接口传递appid、secret(AppSecret)、js_code(code)参数

   https://api.weixin.qq.com/sns/jscode2sessionappid=${appId}&secret=${AppSecret}&js_code=${code}&grant_type=authorization_code

7. 引入WXBizDataCrypt解密文件，new WXBizDataCrypt传递参数appId、session_key。下载文件

8. decryptData(encryptedData, iv)获取解密JSON数据。

   'use strict';
   
   const { Controller } = require('egg');
   const WXBizDataCrypt = require('./WXBizDataCrypt');
   const datetime = require('silly-datetime'); //npm i silly-datetime --save 时间格式化库
   
   class HomeController extends Controller {
       async index() {
           const { ctx } = this;
           // 获取前端传递参数
           const { code, encryptedData, iv } = ctx.query;
           // 小程序平台复制appId、AppSecret
           const appId = 'wx2b5d4b45d5464fd3';
           const AppSecret = 'e7c02d8b31c38501dfaa4b86afec768b';
           const URL = `https://api.weixin.qq.com/sns/jscode2session?appid=${appId}&secret=${AppSecret}&js_code=${code}&grant_type=authorization_code`;
           // 请求微信接口，获取session_key
           const { data: { session_key } } = await ctx.curl(URL, {
             method: 'get',
             dataType: 'json',
           });
           // 引入WXBizDataCrypt文件，new出实例传递参数
           const pc = new WXBizDataCrypt(appId, session_key);
           const { stepInfoList } = pc.decryptData(encryptedData, iv);
           const date = [];
           const step = [];
           stepInfoList.forEach(item => {
             // 修改日期格式
             date.push(datetime.format(new Date(item.timestamp * 1000), 'YYYY-MM-DD'));
             step.push(item.step);
           });
           ctx.body = {
             code: 200,
             msg: '成功',
             data: {
               date,
               step,
             },
           };
         }
   }
   module.exports = HomeController;