如题所述
1.网站接入微信登录的好处
网站接入微信登录,微信登录使网站可以免除注册的流程,并充分利用庞大的微信用户群来实现快速传播;网站接入微信登录后,用户只需要使用手机扫码就可登录,简化用户注册流程,更有效率的提高转化用户流量。
2.站接入微信登录之前需要申请
接入微信登录前,网站需首先进行申请,获得对应的appid与appkey,以保证后续流程中可正确对网站与用户进行验证与授权;我们以瓴码官网http://www.zeropaas.com申请。
3.瓴码官网前端增加相关代码
let nowUrl = location.href;
let result = /code=(w*)&state=([0-9]*)/.exec(nowUrl);
if(result){
window.parent.postMessage(nowUrl,'*');
}
4.网站前端将微信登录二维码图标内嵌至一个p中,并显示该p
!function (a, b, c) {
function d(a) {
var c = "default";
a.self_redirect === !0 ? c = "true" : a.self_redirect === !1 && (c = "false");
var d = b.createElement("iframe"),
e = "https://open.weixin.qq.com/connect/qrconnect?appid=" + a.appid + "&scope=" + a.scope + "&redirect_uri=" + a.redirect_uri + "&state=" + a.state + "&login_type=jssdk&self_redirect=" + c + '&styletype=' + (a.styletype || '') + '&sizetype=' + (a.sizetype || '') + '&bgcolor=' + (a.bgcolor || '') + '&rst=' + (a.rst || '');
e += a.style ? "&style=" + a.style : "", e += a.href ? "&href=" + a.href : "", d.src = e, d.frameBorder = "0", d.allowTransparency = "true", d.scrolling = "no", d.width = "300px", d.height = "400px";
var f = b.querySelector('.weChatLogin_col_weChatBouncedDiv');//微信二维码内嵌p
f.innerHTML = "", f.appendChild(d)
}
a.WxLogin = d
}(window, document);
const state = Number(new Date()).toString();//获取状态值
window.sessionStorage.setItem('state', state )//暂存状态值
const obj = new WxLogin({//实例化一个二维码
self_redirect: true,
id: "weChatBouncedDiv",//微信二维码图标内嵌p的id
appid: "wxfb8bf3273365770a",//应用唯一标识
scope: "snsapi_login",
redirect_uri: "http%3a%2f%2fzeropaas.com",//回调地址
state: state ,//用于保持请求和回调的状态,授权请求后原样带回给第三方;该参数可应用于防止csrf攻击(攻击)
});
5.网站前端微信登录授权成功之后的处理
window.onmessage = function(e) {//微信登录授权成功后,官网触发该消息
let url = e.data;//e.data="http://www.zeropaas.com/?code=xxx&state=xxx"
if(url.indexOf('?') != -1){
url = url.substr(url.indexOf('?'))//url="?code=xxx&state=xxx"
let arr = url.substr(1).split('&');//arr=["code=xxx","state=xxx"]
arr = arr.map(item => {
item = item.split('=')
let map = new Map()
map.set(item[0],item[1])
item = Object.fromEntries(map)
return item
})//arr=[{code:"xxx"},{state:"xxx"}]
let oldState = window.sessionStorage.getItem('state');
let newState = arr[1].state;
//
// loadingDiv.style.display = 'flex'
// loadingDiv.innerHTML = '正在登录中...'
$this.showVessel('loadingDiv',true,()=>{//显示正在登录中
$this.sm['loading'].startModule(function () {
$this.showSubModule('loading', true, function () {
if(oldState === newState){
$this.ep.thirdLogin(0,arr[0].code,1,1,0,null,function (result) {//向云端发送第三登录事件,code是微信登录码
if (result === null) {
$this.$router.push('/')//微信登录成功,并且不要绑定手机号
} else {//微信登录成功,并且需要绑定手机号
$this.openID = result//微信用户ID
$this.showSubModule('loading', false, function () {}, function () {})
$this.showVessel('loadingDiv',false,()=>{},()=>{})//隐藏正在登录中
$this.showBindingPhone()//绑定手机号
}
},function (err) {
console.log(err)
})
}
}, function () {})
}, function () {})
},()=>{})
window.onmessage = null
}
},
6.网站云端获取微信openid和access_token
function getOpenid_WX(appid,appSecret,code,successCB, errorCB){//获取微信openid和token
const request = require(global.nodePath + "/node_modules/request");
let url1= 'https://api.weixin.qq.com/sns/oauth2/access_token?appid=' + appid + '&secret=' + appSecret + '&code=' + code + '&grant_type=authorization_code';
request.get(
{
url: url1,
method: "GET",
json: true,
headers: {
"Content-type": "application/json",
},
},function (error, response, body) {
if (response.statusCode == 200) {
let data = JSON.stringify(body, null, 4);//从一个对象解析出,第三个参数是格式化缩进格式按照四个字符缩进
let data1 = (JSON.parse(data));
let access_token = data1.access_token;
let openid = data1.openid;
successCB(access_token,openid);
}else {
errorCB(['获取微信信息失败!状态码:'+ response.statusCode]);
}
}
);
}
7.微信登录和QQ登录的区别
微信登录可以内嵌网站登录页面,也可以打开微信登录授权页面,QQ登录不可以内嵌网站登录授权页面,必须打开QQ登录授权页面,如果是打开微信或QQ登录授权页面,则登录授权成功后必须关闭该页面。
微信登录回调地址可以指定一级或二级子目录,比如 "http%3a%2f%2fzeropaas.com "或"http%3a%2f%2fzeropaas.com/qqLogin", QQ登录回调地址必须指定二级子目录,比如 "http%3a%2f%2fzeropaas.com/qqLogin"