本文整理汇总了PHP中Google_HttpRequest::getParsedCacheControl方法的典型用法代码示例。如果您正苦于以下问题：PHP Google_HttpRequest::getParsedCacheControl方法的具体用法？PHP Google_HttpRequest::getParsedCacheControl怎么用？PHP Google_HttpRequest::getParsedCacheControl使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类Google_HttpRequest的用法示例。
在下文中一共展示了Google_HttpRequest::getParsedCacheControl方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的PHP代码示例。
示例1: isExpired
/**
* @static
* @param Google_HttpRequest $resp
* @return bool True if the HTTP response is considered to be expired.
* False if it is considered to be fresh.
*/
public static function isExpired(Google_HttpRequest $resp)
{
// HTTP/1.1 clients and caches MUST treat other invalid date formats,
// especially including the value “0”, as in the past.
$parsedExpires = false;
$responseHeaders = $resp->getResponseHeaders();
if (isset($responseHeaders['expires'])) {
$rawExpires = $responseHeaders['expires'];
// Check for a malformed expires header first.
if (empty($rawExpires) || is_numeric($rawExpires) && $rawExpires <= 0) {
return true;
}
// See if we can parse the expires header.
$parsedExpires = strtotime($rawExpires);
if (false == $parsedExpires || $parsedExpires <= 0) {
return true;
}
}
// Calculate the freshness of an http response.
$freshnessLifetime = false;
$cacheControl = $resp->getParsedCacheControl();
if (isset($cacheControl['max-age'])) {
$freshnessLifetime = $cacheControl['max-age'];
}
$rawDate = $resp->getResponseHeader('date');
$parsedDate = strtotime($rawDate);
if (empty($rawDate) || false == $parsedDate) {
$parsedDate = time();
}
if (false == $freshnessLifetime && isset($responseHeaders['expires'])) {
$freshnessLifetime = $parsedExpires - $parsedDate;
}
if (false == $freshnessLifetime) {
return true;
}
// Calculate the age of an http response.
$age = max(0, time() - $parsedDate);
if (isset($responseHeaders['age'])) {
$age = max($age, strtotime($responseHeaders['age']));
}
return $freshnessLifetime <= $age;
}