微信小程序登陆及登陆状态保持前后端php代码 缓存redis

微信小程序给出的demo并不是很详细，让人看起来很困惑，小编在此贴出代码供各位朋友参考。

 小程序端代码

my.js

Page({

data: {

},

onLoad: function (options) {

var that = this

wx.checkSession({

success: function () {

console.log("登陆未过期")

wx.getStorage({

key: 'thirdsession',

success: function (res) {

console.log("客户端有缓存")

var sessionid = res.data

//console.log(sessionid)

wx.getUserInfo({

success: function (res) {

var encryptedData = res.encryptedData

var iv = res.iv

wx.request({

url: '你的域名/api/getuserinfo.php',

data: {

sessionid: sessionid,

encryptedData: encryptedData,

iv: iv

},

method: 'GET',

success: function (res) {

//console.log(res.data)

that.setData({

nickName: res.data.nickName,

avatarUrl: res.data.avatarUrl

})

//此处判断解密数据返回的状态码，如果为负数说明服务器端redis缓存失效，就需要重新走一遍登陆流程

if (res.data < 0)
{

//console.log("0")

wx.login({

success: function (res) {

var jcode = res.code

wx.request({

url: '你的域名/api/getsession.php',

data: {

jcode: jcode

},

method: 'GET',

success: function (res) {

//console.log(res)

var thirdsession = res.data.sessionid

wx.setStorage({

key: 'thirdsession',

data: thirdsession,

success: function () {

var sessionid = thirdsession

//console.log(sessionid)

wx.getUserInfo({

success: function (res) {

var encryptedData = res.encryptedData

var iv = res.iv

wx.request({

url: '<
140e8
span style="margin:0px;padding:0px;list-style-type:none;color:rgb(255,0,0);">你的域名/api/getuserinfo.php',

data: {

sessionid: sessionid,

encryptedData: encryptedData,

iv: iv

},

method: 'GET',

success: function (res) {

that.setData({

nickName: res.data.nickName,

avatarUrl: res.data.avatarUrl

})

}

})

}

})

}

})

}

})

}

})

} else {

//console.log("解密成功")

}

}

})

}

})

},

fail: function (res) {

console.log("客户端没有缓存")

wx.login({

success: function (res) {

//console.log(res.code)

var jcode = res.code

wx.request({

url: '你的域名/api/getsession.php',

data: {

jcode: jcode

},

method: 'GET',

success: function (res) {

//console.log(res.data)

var thirdsession = res.data.sessionid

wx.setStorage({

key: 'thirdsession',

data: thirdsession,

success: function () {

var sessionid = thirdsession

//console.log(sessionid)

wx.getUserInfo({

success: function (res) {

//console.log(res.iv)

var encryptedData = res.encryptedData

var iv = res.iv

wx.request({

url: '你的域名/api/getuserinfo.php',

data: {

sessionid: sessionid,

encryptedData: encryptedData,

iv: iv

},

method: 'GET',

success: function (res) {

that.setData({

nickName: res.data.nickName,

avatarUrl: res.data.avatarUrl

})

}

})

}

})

}

})

}

})

}

})

}

})

},

fail: function () {

console.log("登陆已过期")

}

})

},

})

my.wxml

<view  class="userinfo">

<image class="userinfo-avatar" src="{{avatarUrl}}" background-size="cover"></image>

<text class="userinfo-nickname">{{nickName}}</text>

</view>

getsession.php

<?php

$appid='你的appid';

$secret='你的secret';

$grant_type='authorization_code';

$jscode=$_GET['jcode'];

$url="https://api.weixin.qq.com/sns/jscode2session?appid=$appid&secret=$secret&js_code=$jscode&grant_type=$grant_type";

$fh= file_get_contents($url);

$array=json_decode($fh,true);

$openid=isset($array['openid'])?$array['openid']:$array['errcode'];

$session_key=$array['session_key'];

$expires_in=$array['expires_in'];

$sessionid= md5(uniqid(mt_rand()));

$response["result"] = 1;

$response["msg"] = "返回sessionid";

$response["sessionid"] = $sessionid;

echo json_encode($response);

$redis = new Redis();

$redis->connect('127.0.0.1', 6379);

$redis->set($sessionid,$openid.';'.$session_key, 7200);

 

?> 

getuserinfo.php

<?php

include_once "wxBizDataCrypt.php";  //（wxBizDataCrypt.php下载微信小程序解密demo php版本即可获得）

$appid='你的appid';

$secret='你的secret';

$sessionid=$_GET['sessionid'];

$encryptedData=$_GET['encryptedData'];

$iv=$_GET['iv'];

$redis = new Redis();

$redis->connect('127.0.0.1', 6379);

$value=$redis->get($sessionid);

$arraylist=split(";",$value);

$openid=$arraylist[0];

$session_key=$arraylist[1];

$pc = new WXBizDataCrypt($appid, $session_key);

$errCode = $pc->decryptData($encryptedData, $iv, $data );

if ($errCode == 0) {

    print($data . "\n");

} else {

    print($errCode . "\n"); //解密失败的话返回码均为负数，在微信小程序客户端my.js要用到

}

?>

以上内容如有不明白的，可以添加1688源码 微信公众号，给我们留言，还可获取源码哦。

转载请注明出处！