Common
namespace Proxy\Action;
use Think\Action;
use Vendor\Func\Red;
class CommonAction extends Action
{
public $red;
public function _initialize(){
$this->red = Red::create();
header('Content-type: text/html; charset=utf-8');
}
/**
* 错误的json
* @param $code
* @param string $message
* @param array $data
*/
public function jsonError($code, $message = 'error', $data = [])
{
$returnData = [
'code' => $code,
'message' => $message,
'data' => $data
];
header('Content-type:application/json;charset=utf-8');
echo json_encode($returnData);
exit;
}
/**
* 正确的json
* @param int $code
* @param string $message
* @param array $data
*/
public function jsonSuccess($code = 1, $message = 'success', $data = [])
{
$returnData = [
'code' => $code,
'message' => $message,
'data' => $data
];
header('Content-type:application/json;charset=utf-8');
echo json_encode($returnData);
exit;
}
/**
* 设置Redis
* @param $k
* @param $v
* @param int $expires
* @return mixed
*/
public function setCache($k, $v, $expires = -1)
{
if ($expires === -1) {
return $this->red->set($k, $v);
} else {
return $this->red->setex($k, $expires, $v);
}
}
/**
* 获取Redis
* @param $k
* @return mixed
*/
public function getCache($k)
{
return $this->red->get($k);
}
/**
* 删除Redis
* @param $k
* @return mixed
*/
public function delCache($k)
{
return $this->red->delete($k);
}
/**
* 获取过期时间
* @param $k
* @return bool
*/
public function getCacheTtl($k)
{
$ttl = $this->red->ttl($k);
if ($ttl != '-2') {
return $ttl;
} else {
return false;
}
}
/**
* 检查是否存在
* @param $k
* @return mixed
*/
public function cacheExists($k)
{
return $this->red->exists($k);
}
}
AccessToken
namespace Proxy\Action;
use Vendor\Func\Http;
/***
* 基础支持的access_token,每日两千次
* @package Proxy\Action
*/
class AccessTokenAction extends CommonAction
{
const API_TOKEN = 'https://api.weixin.qq.com/cgi-bin/token';
const API_TICKET = 'https://api.weixin.qq.com/cgi-bin/ticket/getticket';
const TOKEN_EXPIRES = 1500;
const TICKET_EXPIRES = 1500;
protected $access_token_key = ''; // access_token Redis 键值名
protected $js_ticket_key = ''; // 凭证 Redis 键值名
public function __construct()
{
parent::__construct();
$this->access_token_key = C('WX_APP_ID').':access_token';
$this->js_ticket_key = C('WX_APP_ID').':js_ticket';
}
/**
* 获取全局access_token
*/
public function get()
{
// step1 判是存在
$exists = $this->cacheExists($this->access_token_key);
// step2 是否强制刷新或者已过期
if ((isset($_GET['flush']) & $_GET['flush']) || !$exists) {
$data = $this->reload();
} else {
$data = [
'access_token' => $this->getCache($this->access_token_key),
'expires_in' => $this->getCacheTtl($this->access_token_key)
];
}
if (!$data['access_token']) {
$this->ajaxReturn($this->jsonError(10002, '接口请求失败'));
}
$this->ajaxReturn($this->jsonSuccess(1, '成功', $data));
}
/**
* 公众号用于调用微信JS接口的临时票据
* @return bool
*/
public function jsTicket()
{
// step1 判是存在
$exists = $this->cacheExists($this->js_ticket_key);
if (!$exists) {
// 获取token
$token = $this->getCache($this->access_token_key);
setlog($token,[],'token');
// 如果token不存在，重新生成
if (!$token) {
// 重新加载一次Token
$this->reload();
$token = $this->getCache($this->access_token_key);
}
$params = [
'access_token' => $token,
'type' => 'jsapi',
];
$data = Http::newDoGet(self::API_TICKET, $params);
$data = json_decode($data, true);
if ((int)$data['errcode'] !== 0) {
$this->delCache($this->access_token_key);
return false;
}
// 减少1500秒过期时间，提前过期
$this->setCache($this->js_ticket_key, $data['ticket'], $data['expires_in'] - self::TICKET_EXPIRES);
} else {
$data['ticket'] = $this->getCache($this->js_ticket_key);
}
return $data['ticket'];
}
/**
* 获取JS-SDK配置信息
*/
public function getConfig()
{
if (!isset($_GET['uri'])) {
$this->ajaxReturn($this->jsonError(0, '参数错误'));
}
$url = $_GET['uri'];
$ticket = $this->jsTicket();
setlog($ticket,[],'ticket');
while (!$ticket) {
$this->reload();
$ticket = $this->jsTicket();
}
$data = [
'jsapi_ticket' => $ticket,
'nonceStr' => (string)mt_rand(),
'timestamp' => time(),
'url' => $url
];
$sign = $this->getSign($data);
$data['signature'] = $sign;
$data['appId'] = C('WX_APP_ID');
$this->ajaxReturn($this->jsonSuccess(1, '成功', $data));
}
/**
* 重新载入 access_token
*/
protected function reload()
{
if ($this->cacheExists($this->access_token_key)) {
$data = [
'access_token' => $this->getCache($this->access_token_key),
'expires_in' => $this->getCacheTtl($this->access_token_key)
];
return $data;
}
$params = [
'grant_type' => 'client_credential',
'appid' => C('WX_APP_ID'),
'secret' => C('WX_APP_SECRET')
];
$data = Http::newDoGet(self::API_TOKEN, $params);
if (!$data) {
$this->ajaxReturn($this->jsonError(10002, '接口请求失败'));
}
$data = json_decode($data, true);
if (isset($data['errcode'])) {
$this->ajaxReturn($this->jsonError($data['errcode']), $data['errmsg']);
}
$this->setCache($this->access_token_key, $data['access_token'], $data['expires_in'] - self::TOKEN_EXPIRES);
return $data;
}
/**
* 签名算法
* @param $data
* @return string
*/
protected function getSign($data)
{
$str = '';
foreach ($data as $k => $v) {
$str .= strtolower($k) .'='.$v;
$str .= '&';
}
$str = trim($str, '&');
$str = sha1($str);
return $str;
}
}
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