微信小程序登录
首先、看下界面和文件
三张图片
这里有张图片、是白色的、看不出来
配置下域名比如说我下面用到了http://127.0.0.1:8000/
那么在微信公众平台 开发管理->开发设置->服务器域名->request合法域名里面添加要使用的域名
index.wxml
<view class="main">
<view class="top" bindtap="show">
<view class="login-left">
<view class="t1">{{userInfo.nickName}}view>
<view class="t2">{{tip}}view>
view>
<image class="avatar" src="{{userInfo.avatarUrl}}">image>
view>
<view class="modal" wx:if="{{showLogin}}">
<view class="modal-window">
<image bindtap="close" src="../../images/close.png">image>
<view>
<view style="width: 100%;text-align: center;font-size:6vw;">登录或注册view>
<view class="login-btn" bindtap="login">
<image src="../../images/wechat-fill.png">image>
微信账号快速登录
view>
<view>
<text class="t4">登录代表您已同意本程序text>
<text class="t3">《用户协议》text>
<text class="t4">和text>
<text class="t3">《隐私政策》text>
view>
view>
view>
view>
view>
index.wxss
.main {
height: 100vh;
width: 100vw;
}
.top {
width: 100vw;
padding: 0 3vw;
height: 15vh;
display: flex;
justify-content: center;
align-items: flex-end;
background-color: #2d8cf0;
position: relative;
}
.login {
display: flex;
}
.login-left {
position: absolute;
left: 3vw;
bottom: 3vh;
}
.avatar {
width: 20vw;
height: 20vw;
border-radius: 100px;
background-color: white;
position: absolute;
right: 10vw;
bottom: 2vh;
}
.t1 {
color: white;
font-size: 6vw;
}
.t2 {
color: white;
font-size: 3.5vw;
margin-top: 0.6vh;
}
.t3 {
color: #2d8cf0;
font-size: 3.5vw;
}
.t4 {
color: #808695;
font-size: 3.5vw;
}
.modal {
position: fixed;
top: 0;
width: 100vw;
height: 100vh;
background: rgba(0, 0, 0, 0.6);
display: flex;
justify-content: center;
align-items: center;
}
.modal-window {
background: white;
width: 76vw;
height: 35vw;
border-radius: 3px;
position: relative;
padding: 6vw;
}
.modal-window>image {
width: 6vw;
height: 6vw;
position: absolute;
right: 2vw;
top: 2vw;
}
.login-btn {
width: 100%;
display: flex;
justify-content: center;
align-items: center;
background: #2d8cf0;
color: white;
height: 12vw;
border-radius: 3px;
margin-top: 3vw;
}
.login-btn>image {
width: 8vw;
height: 8vw;
margin-right: 1vw;
}
index.js
Page({
/**
* 页面的初始数据
*/
data: {
userInfo: {
avatarUrl: "../../images/default.png",
country: "",
province: "",
city: "",
gender: 0,
language: "zh_CN",
nickName: "未登录/注册"
},
encrypted_data:"",
iv:"",
tip: "点击头像可登录/注册",
avatar: "../../images/default.png",
showLogin: false,
isLogin: false,
js_code: ""
},
close() {
this.setData({
showLogin: false
});
},
show() {
if (!this.data.isLogin) {
this.setData({
showLogin: true
});
}
},
login() {
let that = this;
// 获取微信用户信息
wx.getUserProfile({
desc: '完善会员信息',
lang: 'zh_CN',
success(res) {
console.log(res);
// 存储用户信息
wx.setStorage({
key: 'userInfo',
data: JSON.stringify(res.userInfo),
success(rs) {
that.setData({
userInfo: res.userInfo,
tip: "欢迎使用本程序",
isLogin: true,
encrypted_data:res.encryptedData,
iv:res.iv
});
that.close();
// 登录获取code
wx.login({
timeout: 2000,
success: (result) => {
let js_code = result.code;
that.sendCode(js_code);
that.setData({ js_code });
}
});
}
});
}
});
},
getPhoneNumber(e){
console.log(e);
},
sendCode(js_code) {
let encrypted_data = this.data.encrypted_data;
let iv = this.data.iv;
// 获取session_key
wx.request({
url: 'http://127.0.0.1:8000/login?js_code=' + js_code,
method: "GET",
success(res) {
// 获取本地存储session_key
if (res.data.msg == 'success') {
wx.request({
url: 'http://127.0.0.1:8000/get_encrypted_data',
method:"POST",
data:{iv,encrypted_data},
header:{
"Content-Type":"application/x-www-form-urlencoded;charset=utf-8;"
},
success(res){
console.log(res);
}
});
}
}
});
},
/**
* 生命周期函数--监听页面加载
*/
onLoad(options) {
let that = this;
wx.checkSession({
success: (r2) => {
if (r2.errMsg == "checkSession:ok") {
wx.getStorage({
key: "userInfo",
success(r3) {
that.setData({
userInfo: JSON.parse(r3.data),
isLogin: true
});
}
});
}
},
});
}
})
后端用python写了
首先创建个django项目
在项目根目录打开命令行执行python manage.py startapp app01
然后就是这样的
在urls.py里面设置urlpatterns = [path(‘login’,views.login)]
在settings.py
INSTALLED_APPS = [
'django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'app01.apps.App01Config', # 这是要添加的模块
]
一个微信官方的解析代码WXBizDataCrypt.py
import base64
import json
from Crypto.Cipher import AES
class WXBizDataCrypt:
def __init__(self, app_id, session_key):
self.appId = app_id
self.session_key = session_key
def decrypt(self, encrypted_data, iv):
# base64 decode
session_key = base64.b64decode(self.session_key)
encrypted_data = base64.b64decode(encrypted_data)
iv = base64.b64decode(iv)
cipher = AES.new(session_key, AES.MODE_CBC, iv)
decrypted = json.loads(self._unpad(cipher.decrypt(encrypted_data)))
if decrypted['watermark']['appid'] != self.appId:
raise Exception('Invalid Buffer')
return decrypted
def _unpad(self, s):
return s[:-ord(s[len(s) - 1:])]
接着是app01/views.py
import json
from django.http import HttpResponse
import requests
from app01.WXBizDataCrypt import WXBizDataCrypt
# 解析code获得openid和session_key
def login(req):
try:
js_code = req.GET.get("js_code") # 小程序传过来的js_code
url = "https://api.weixin.qq.com/sns/jscode2session" # 微信官方的API用于获取openid等信息
params = {
"appid": "**********",
"secret": "**********",
"js_code": js_code,
"grant_type": "authorization_code"
}
# 解析得到{"session_key": "FaP8AnhlC1TQtXavzZGnxQ==", "openid": "o5ScH5t0hIsE28JKzDLacbd-3Prc"}
result = requests.get(url, params).json()
# 这里没有操作数据库、将信息写入文件
fo = open("public/data.txt", "w")
fo.write(json.dumps(result))
fo.close()
return HttpResponse(json.dumps({"msg": "success"}))
except:
return HttpResponse(json.dumps({"msg": "fail"}))
# 解密encrypted_data
def get_encrypted_data(req):
try:
# 读取文件
fo = open('public/data.txt', 'r+')
result = json.loads(fo.read())
# 得到session_key
session_key = result['session_key']
# 小程序AppId
app_id = "*******************"
# 小程序端传过来的数据
encrypted_data = req.POST.get('encrypted_data')
iv = req.POST.get('iv')
# 解密
pc = WXBizDataCrypt(app_id, session_key)
back = pc.decrypt(encrypted_data, iv)
return HttpResponse(json.dumps(back))
except:
return HttpResponse(json.dumps({"msg": "fail"}))