写在前面
关于微信的 access_token，我们经常碰到的问题，就是失效，access_token 一旦失效，跟其相关的操作就无法进行，那么该如何避免呢。采用redis，进行存储处理，可避免在没有失效的情况下，反复请求（防止超过限制）！
一、 验证access_token是否失效，获取 access_token，存入redis并获取
-Redis_access_token_service.php
/**
* 从redis获取access_token
*
* @desc 判断access_token是否失效，未失效，统一从指定服务器151获取access_token；失效，获取，返回，并存入redis
* @author NangongYi
* @time 2019/09/28 00:57:58
*
*/
class Redis_access_token_service
{
/**
* 获取access_token
*/
public function get_t_access_token()
{
return $this->check_access_token_is_effective();
}
/**
* 从redis里获取access_token
* @return string
*/
private function get_access_token_from_t_redis()
{
$this->load->library('tredis');
return $this->tredis->get('t_redis_access_token');
}
/**
* 将access_token存入到 Tredis
* @param $access_token
*/
private function store_access_token_in_t_redis($access_token)
{
$this->load->library('tredis');
$this->tredis->set('t_redis_access_token', $access_token);
}
/**
* 判断存入t_redis的access_token是否有效
* @desc 无效，获取；有效，返回。
* @return string $access_token
*/
private function check_access_token_is_effective()
{
$access_token = $this->get_access_token_from_t_redis();
$url = "https://api.weixin.qq.com/cgi-bin/getcallbackip?access_token=".$access_token;
$result = $this->https_request($url);
$data = json_decode($result,true);
if($data['errcode'] == '40001'){
$access_token = $this->get_access_token_from_wechat();
$this->store_access_token_in_t_redis($access_token);
}
return $access_token;
}
/**
* https请求
* @param $url
* @return mixed
*/
private function https_request($url)
{
$ch = curl_init(); // 创建句柄
curl_setopt($ch, CURLOPT_URL, $url); // 通过url获取数据
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);// 跳过证书验证
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 从证书中检查SSL加密算法是
$output = curl_exec($ch);
curl_close($ch);
return $output;
}
/**
* 从微信端请求access_token
* @return mixed
*/
private function get_access_token_from_wechat()
{
// 从配置文件获取配置参数
$this->load->config('dict/wechat_config');
$appConfig = $this->config->item('dict_wechat_user');
// 请求地址
$url = 'https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid='.
$appConfig['app_id'].'&secret='.$appConfig['secret'];
$ch = curl_init(); // 创建句柄
curl_setopt($ch, CURLOPT_URL, $url); // 通过url获取数据
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); // 获取的信息以文件流的形式返回
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);// 跳过证书验证
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, false); // 从证书中检查SSL加密算法是
$output = json_decode(curl_exec($ch));
$access_token = $output->access_token;
curl_close($ch);
return $access_token;
}
}
二、Tredis类，定义连接，以及一中的相关操作
-Tredis.php
/**
* access_token存放的统一Redis
* @author NangongYi
* @time 2019/09/29
*/
class Tredis
{
/**
* [Class Property Description]
*
* @var [data type]
* @access [public/protected/private]
*/
private $_redis = NULL;
/**
* [Class Property Description]
*
* @var [data type]
* @access [public/protected/private]
*/
private $_redis_conf = [
'hostname' => '56.89.116.78',
'port' => 9870
];
/**
* [Class Property Description]
*
* @var [data type]
* @access [public/protected/private]
*/
const NO_RESULT = NULL;
/**
* 默认的缓存键
*/
const CONF_KEY_DEFAULT = 'T_redis';
/**
* Constuction
* @param array configuration of redis
* @desc boolean true for sucess or false for faillure
*/
function __construct($conf_key = NULL)
{
$conf_key = ($conf_key == NULL || empty($conf_key['conf_key'])) ?
self::CONF_KEY_DEFAULT : $conf_key['conf_key'];
$CI =& get_instance();
$conf = [];
if ($CI->config->load('redis', FALSE, TRUE)) {
if (is_array($CI->config->config[$conf_key])) {
$conf = $CI->config->config[$conf_key];
}
}
$this->_redis_conf = array_merge($this->_redis_conf, $conf);
try {
// redis hostname error
if (empty($this->_redis_conf['hostname'])) {
throw new RedisException();
}
$this->_redis = new redis();
$single = $this->_redis->connect($this->_redis_conf['hostname'],
$this->_redis_conf['port'], $this->_redis_conf['timeout']);
if (!$single) {
$this->_redis = NULL;
}
} catch (RedisException $e) {
$this->_redis = NULL;
}
}
/**
* Storage a value to the redis
* @access public
* @param string
* @param string
* @param int time of living(seconds), if the value is 0s, then the value is permanent.
* @return boolean success return TRUE, failure return FALSE.
*/
public function set($key, $value, $ttl = 0)
{
if ($this->_is_connect() === FALSE) {
return self::NO_RESULT;
}
$ttl = intval($ttl);
if ($ttl) {
$result = $this->_redis->setex($key, $ttl, $value);
} else {
$result = $this->_redis->set($key, $value);
}
return $result;
}
/**
* get value(s)
*
* @access public
* @param string
* @return mix return value of the key
*/
public function get($key)
{
if ($this->_is_connect() === FALSE) {
return self::NO_RESULT;
}
return $this->_redis->get($key);
}
/**
* check redis connect or not
* @return boolean
*/
private function _is_connect()
{
return $this->_redis ? TRUE : FALSE;
}
/**
* 检查redis连接情况
*/
public function check_connect()
{
return $this->_is_connect();
}
}
就这样，做个整理，方便以后看，如果能帮到，也方便他人吧。
