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<?php |
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// +---------------------------------------------------------------------- |
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// | ThinkPHP [ WE CAN DO IT JUST THINK ] |
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// +---------------------------------------------------------------------- |
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// | Copyright (c) 2006~2019 http://thinkphp.cn All rights reserved. |
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// +---------------------------------------------------------------------- |
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 ) |
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// +---------------------------------------------------------------------- |
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// | Author: liu21st <[email protected]> |
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// +---------------------------------------------------------------------- |
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declare (strict_types = 1); |
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namespace think\middleware; |
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use Closure; |
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use think\Cache; |
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use think\Config; |
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use think\Request; |
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use think\Response; |
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/** |
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* 请求缓存处理 |
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*/ |
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class CheckRequestCache |
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{ |
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/** |
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* 缓存对象 |
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* @var Cache |
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*/ |
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protected $cache; |
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/** |
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* 配置参数 |
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* @var array |
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*/ |
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protected $config = [ |
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// 请求缓存规则 true为自动规则 |
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'request_cache_key' => true, |
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// 请求缓存有效期 |
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'request_cache_expire' => null, |
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// 全局请求缓存排除规则 |
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'request_cache_except' => [], |
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// 请求缓存的Tag |
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'request_cache_tag' => '', |
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]; |
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public function __construct(Cache $cache, Config $config) |
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{ |
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$this->cache = $cache; |
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$this->config = array_merge($this->config, $config->get('route')); |
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} |
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/** |
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* 设置当前地址的请求缓存 |
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* @access public |
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* @param Request $request |
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* @param Closure $next |
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* @param mixed $cache |
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* @return Response |
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*/ |
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public function handle($request, Closure $next, $cache = null) |
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{ |
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if ($request->isGet() && false !== $cache) { |
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$cache = $cache ?: $this->getRequestCache($request); |
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if ($cache) { |
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if (is_array($cache)) { |
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list($key, $expire, $tag) = $cache; |
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} else { |
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$key = str_replace('|', '/', $request->url()); |
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$expire = $cache; |
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$tag = null; |
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} |
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if (strtotime($request->server('HTTP_IF_MODIFIED_SINCE', '')) + $expire > $request->server('REQUEST_TIME')) { |
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// 读取缓存 |
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return Response::create()->code(304); |
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} elseif (($hit = $this->cache->get($key)) !== null) { |
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list($content, $header, $when) = $hit; |
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if ($expire === null || $when + $expire > $request->server('REQUEST_TIME')) { |
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return Response::create($content)->header($header); |
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} |
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} |
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} |
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} |
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$response = $next($request); |
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if (isset($key) && 200 == $response->getCode() && $response->isAllowCache()) { |
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$header = $response->getHeader(); |
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$header['Cache-Control'] = 'max-age=' . $expire . ',must-revalidate'; |
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$header['Last-Modified'] = gmdate('D, d M Y H:i:s') . ' GMT'; |
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$header['Expires'] = gmdate('D, d M Y H:i:s', time() + $expire) . ' GMT'; |
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$this->cache->tag($tag)->set($key, [$response->getContent(), $header, time()], $expire); |
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} |
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return $response; |
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} |
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/** |
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* 读取当前地址的请求缓存信息 |
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* @access protected |
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* @param Request $request |
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* @return mixed |
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*/ |
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protected function getRequestCache($request) |
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{ |
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$key = $this->config['request_cache_key']; |
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$expire = $this->config['request_cache_expire']; |
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$except = $this->config['request_cache_except']; |
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$tag = $this->config['request_cache_tag']; |
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if ($key instanceof \Closure) { |
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$key = call_user_func($key, $request); |
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} |
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if (false === $key) { |
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// 关闭当前缓存 |
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return; |
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} |
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foreach ($except as $rule) { |
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if (0 === stripos($request->url(), $rule)) { |
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return; |
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} |
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} |
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if (true === $key) { |
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// 自动缓存功能 |
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$key = '__URL__'; |
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} elseif (strpos($key, '|')) { |
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list($key, $fun) = explode('|', $key); |
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} |
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// 特殊规则替换 |
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if (false !== strpos($key, '__')) { |
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$key = str_replace(['__CONTROLLER__', '__ACTION__', '__URL__'], [$request->controller(), $request->action(), md5($request->url(true))], $key); |
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} |
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if (false !== strpos($key, ':')) { |
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$param = $request->param(); |
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foreach ($param as $item => $val) { |
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if (is_string($val) && false !== strpos($key, ':' . $item)) { |
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$key = str_replace(':' . $item, $val, $key); |
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} |
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} |
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} elseif (strpos($key, ']')) { |
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if ('[' . $request->ext() . ']' == $key) { |
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// 缓存某个后缀的请求 |
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$key = md5($request->url()); |
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} else { |
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return; |
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} |
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} |
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if (isset($fun)) { |
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$key = $fun($key); |
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} |
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return [$key, $expire, $tag]; |
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} |
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} |
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