微信小程序 初步认识一（微信运动步数）

1.注册微信小程序

2.安装小程序开发工具

3.实例（显示微信运动步数）

4.后端处理（c#）

一 注册微信小程序

注册地址：https://mp.weixin.qq.com/cgi-bin/registermidpage?action=index&lang=zh_CN&token=

二 安装小程序开发工具

三 实例（显示微信运动步数）

1.app.js 修改

    wx.login({
      success(res) {
        if (res.code) {
          // 发起网络请求
          wx.request({
            url: 'https://localhost:44395/api/WxApiTest/Login',
            data: {
              code: res.code
            },
            success:function(re){
              wx.setStorageSync('openid', re.data.openid)
              wx.setStorageSync('session_key', re.data.session_key)
            },
            fail:function(re){
              console.log(re)
            }
          })

        } else {
          console.log('登录失败！' + res.errMsg)
        }
      }
    })

2.读取微信运动步数

 wx.getWeRunData({
      success(res) {
        const encryptedData = res.encryptedData;
        wx.request({
          url: 'https://localhost:44395/api/WxApiTest/Decrypt',
          method: "Post",
          header: {
            "content-type": "application/x-www-form-urlencoded"
          },
          data: {
            encryptedData: res.encryptedData,
            iv: res.iv,
            session_key: wx.getStorageSync("session_key")
          },
          success: function(json) {
            console.log(json.data.stepInfoList)
            if (json.data.stepInfoList) {
              json.data.stepInfoList = json.data.stepInfoList.reverse()
              for (var i = 0; i < json.data.stepInfoList.length; i++) {
                console.log('日期' + new Date(json.data.stepInfoList[i].timestamp*1000).toLocaleString());
                console.log('步数' + json.data.stepInfoList[i].step);
              }
            }
          }
        })
      }
    })

四 后端处理（c#）

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Security.Cryptography;
using System.Text;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Mvc;

namespace WebApplicationVS2019Study.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class WxApiTestController : ControllerBase
    {
        /// <summary>
        /// 微信登录：获取appId、session_key
        /// </summary>
        /// <returns></returns>
        [HttpGet]
        [Route("Login")]
        public string Login(string code)
        {
            var appId = "xxx";  //这里是真实的appId
            var secret = "xxx"; //这里是真实的secret
            var grant_type = "authorization_code";

            var url = $"https://api.weixin.qq.com/sns/jscode2session?appid=" + appId + "&secret=" + secret + "&js_code=" + code + "&grant_type=" + grant_type;
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(url);
            request.Method = "GET";
            request.ContentType = "text/html;charset=UTF-8";
            request.Timeout = ;

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
            string retString = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            myResponseStream.Close();

            return retString;
        }

        [Route("Decrypt")]
        [HttpPost]
        public string Decrypt()
        {
            var encryptedData = Request.Form["encryptedData"];
            var iv = Request.Form["iv"];
            //var openid = Request.Form["openid"];
            var session_key = Request.Form["session_key"];

            return Decrypto(encryptedData, session_key, iv);
        }

        /// <summary>
        /// 解密方法
        /// </summary>
        private string Decrypto(string encryptedData, string key, string iv)
        {
            byte[] iv2 = Convert.FromBase64String(iv);

            if (string.IsNullOrEmpty(encryptedData)) return "";
            Byte[] toEncryptArray = Convert.FromBase64String(encryptedData);

            System.Security.Cryptography.RijndaelManaged rm = new System.Security.Cryptography.RijndaelManaged
            {
                Key = Convert.FromBase64String(key),
                IV = iv2,
                Mode = System.Security.Cryptography.CipherMode.CBC,
                Padding = System.Security.Cryptography.PaddingMode.PKCS7
            };

            System.Security.Cryptography.ICryptoTransform cTransform = rm.CreateDecryptor();
            Byte[] resultArray = cTransform.TransformFinalBlock(toEncryptArray, , toEncryptArray.Length);

            var res = Encoding.UTF8.GetString(resultArray);

            return res;
        }

    }
}