微信小程序登入流程

wx.login({
      success(res) {
        if (res.code) {
          //发起网络请求
          wx.request({
            url: app.globalData.host+'login',
            method:"post",
            data: {
              code: res.code
            }
          })
        } else {
          console.log('登录失败！' + res.errMsg)
        }
      }
    })

#.......省略一下配置路由啥的
class Login(APIView):
    def post(self,request):
        code = request.data.get('code')
        print(code,type(code))
        #061HMtlG0hAQ6d2hOYkG0DlhlG0HMtlh <class 'str'>

GET https://api.weixin.qq.com/sns/jscode2session?appid=APPID&secret=SECRET&js_code=JSCODE&grant_type=authorization_code

import requests
class Login(APIView):
    def post(self,request):
        code = request.data.get('code')
    #https: // api.weixin.qq.com / sns / jscode2session?appid = {} & secret ={} & js_code = {} & grant_type = authorization_code
        url= f"https://api.weixin.qq.com/sns/jscode2session?appid=xxxx&secret=xxxx&js_code={code}&grant_type=authorization_code"
        #appid与secret不同的开发者不一样
        reponse=requests.get(url)
        #因为返回值是json的形式
        data=reponse.json()
        print(data)

import hashlib
class Login(APIView):
    ........
    if data.get("openid") and data.get("session_key"):
        md5 = hashlib.md5()
        md5.update(data['openid'].encode("utf-8"))
        md5.update(data['session_key'].encode("utf-8"))
        key = md5.hexdigest()
        val =data['session_key']+"&"+data['openid']
        print(key,val)

from rest_framework.response import  Response
from django.core.cache import cache

class Login(APIView):
    ........
    cache.set(key,val)  #存缓存中较少对于数据库的压力
    has_user=models.Wxuser.objects.filter(openid=data['openid']).first() #将唯一标识进行存储
    if not  has_user:
        models.Wxuser.objects.create(openid=data['openid'])
        return Response({
            "code": 200,
            "msg": "ok",
            "data":{'login_key':key}  #发送login_key其目的是为了后续可以直接去缓存取对于信息
        })

 var that = this
    wx.login({
      success(res) {
        if (res.code) {
          //发起网络请求
          wx.request({
            url: app.globalData.host + 'login',
            method: "post",
            data: {
              code: res.code
            },
            success(res) {
              console.log(res.data.data.login_key)
              console.log(that)
              that.setData({
                login_key: res.data.data.login_key
              }
              )
            },
          })
        }else {
          console.log('登录失败！' + res.errMsg)
        }
      }
    })