180 lines
5.7 KiB
PHP
180 lines
5.7 KiB
PHP
<?php
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/**
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* Created by PhpStorm.
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* User: Administrator
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* Date: 2019/5/25 0025
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* Time: 16:47
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*/
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namespace app\api\service;
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use app\lib\exception\ParamException;
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use think\Exception;
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use app\api\model\User as UserModel;
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use think\facade\Cache;
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class UserToken extends Token
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{
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protected $code;
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protected $wxLoginUrl;
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protected $wxAppID;
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protected $wxAppSecret;
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function __construct($code)
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{
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$this->code = $code;
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$this->wxAppID = config('wx.app_id');
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$this->wxAppSecret = config('wx.app_secret');
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$this->wxLoginUrl = sprintf(
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config('wx.login_url'), $this->wxAppID, $this->wxAppSecret, $this->code);
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}
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/**
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* 登陆
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* 思路1：每次调用登录接口都去微信刷新一次session_key，生成新的Token，不删除久的Token
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* 思路2：检查Token有没有过期，没有过期则直接返回当前Token
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* 思路3：重新去微信刷新session_key并删除当前Token，返回新的Token
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*/
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public function get($paramPost)
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{
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$result = curl_get($this->wxLoginUrl);
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// 注意json_decode的第一个参数true
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// 这将使字符串被转化为数组而非对象
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$wxResult = json_decode($result, true);
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if (empty($wxResult)) {
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// 为什么以empty判断是否错误，这是根据微信返回
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// 规则摸索出来的
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// 这种情况通常是由于传入不合法的code
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throw new ParamException([
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'code'=>401,
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'msg' => '获取session_key及openID时异常，微信内部错误',
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'errorCode' => 10001
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]);
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}
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else {
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// 建议用明确的变量来表示是否成功
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// 微信服务器并不会将错误标记为400，无论成功还是失败都标记成200
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// 这样非常不好判断，只能使用errcode是否存在来判断
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$loginFail = array_key_exists('errcode', $wxResult);
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if ($loginFail) {
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$this->processLoginError($wxResult);
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}
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else {
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return $this->grantToken($wxResult,$paramPost);
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}
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}
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}
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// 颁发令牌
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// 只要调用登陆就颁发新令牌
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// 但旧的令牌依然可以使用
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// 所以通常令牌的有效时间比较短
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// 目前微信的express_in时间是7200秒
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// 在不设置刷新令牌（refresh_token）的情况下
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// 只能延迟自有token的过期时间超过7200秒（目前还无法确定，在express_in时间到期后
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// 还能否进行微信支付
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// 没有刷新令牌会有一个问题，就是用户的操作有可能会被突然中断
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private function grantToken($wxResult)
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{
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// 此处生成令牌使用的是TP5自带的令牌
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// 如果想要更加安全可以考虑自己生成更复杂的令牌
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// 比如使用JWT并加入盐，如果不加入盐有一定的几率伪造令牌
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$openid = $wxResult['openid'];
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$user = UserModel::getByOpenID($openid);
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if (!$user)
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// 借助微信的openid作为用户标识
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// 但在系统中的相关查询还是使用自己的uid
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{
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$uid = $this->newUser($openid);
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}
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else {
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$uid = $user->id;
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}
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$cachedValue = $this->prepareCachedValue($wxResult, $uid);
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$token = $this->saveToCache($cachedValue);
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return $token;
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}
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private function newUser($openid){
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$user = UserModel::create([
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'openid' =>$openid
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]);
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return $user->id;
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}
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//生成token并缓存
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private function saveToCache($wxResult){
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$key = self::generateToken();
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$value = json_encode($wxResult);
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$request = Cache::store('redis')->set($key,$value,2592000);
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if(!$request){
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throw new ParamException([
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'code' => 401,
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'msg' => '服务起缓存异常',
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'errorCode' => 10001
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]);
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}
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return $key;
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}
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//缓存数据预处理
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private function prepareCachedValue($wxResult, $uid)
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{
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$cachedValue = $wxResult;
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$cachedValue['uid'] = $uid;
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return $cachedValue;
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}
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private function processLoginError($wxResult){
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throw new ParamException([
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'msg' => $wxResult['errmsg'],
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'errorCode' => $wxResult['errcode']
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]);
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}
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/**
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* 过滤微信昵称的特殊表情
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* @param $text
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* @param string $replaceTo
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* @return null|string|string[]
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*/
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public function filterEmoji($text, $replaceTo = 'x'){
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$clean_text = "";
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// Match Emoticons
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$regexEmoticons = '/[\x{1F600}-\x{1F64F}]/u';
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$clean_text = preg_replace($regexEmoticons, $replaceTo, $text);
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// Match Miscellaneous Symbols and Pictographs
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$regexSymbols = '/[\x{1F300}-\x{1F5FF}]/u';
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$clean_text = preg_replace($regexSymbols, $replaceTo, $clean_text);
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// Match Transport And Map Symbols
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$regexTransport = '/[\x{1F680}-\x{1F6FF}]/u';
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$clean_text = preg_replace($regexTransport, $replaceTo, $clean_text);
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// Match Miscellaneous Symbols
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$regexMisc = '/[\x{2600}-\x{26FF}]/u';
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$clean_text = preg_replace($regexMisc, $replaceTo, $clean_text);
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// Match Dingbats
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$regexDingbats = '/[\x{2700}-\x{27BF}]/u';
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$clean_text = preg_replace($regexDingbats, $replaceTo, $clean_text);
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return $clean_text;
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}
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/**
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* 非小程序登录token
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* @param $arr
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* @return string
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* @throws ParamException
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*/
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public function LoginToken($str)
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{
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$token = $this->saveToCache($str);
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return $token;
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}
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} |