function testParseCacheTime()
{
$client = new \arc\http\ClientStream();
$headers = ['Expires: ' . gmdate('D, d M Y H:i:s T', time() + 100)];
date_default_timezone_set("UTC");
$cachetime = \arc\http\headers::parseCacheTime($headers);
$this->assertTrue($cachetime > 0);
}
function run()
{
$client = \arc\cache::proxy(\arc\http::client(), function ($params) {
return \arc\http\headers::parseCacheTime($params['target']->responseHeaders);
});
$feeds = handleFeeds(__DIR__ . '/../data/feeds.json', $client);
$aggregator = aggregator($client);
echo h::doctype() . h::html(h::head(h::title('RSS Aggregator'), h::link(['href' => '//maxcdn.bootstrapcdn.com/bootstrap/3.3.6/css/bootstrap.min.css', 'rel' => 'stylesheet']), h::link(['href' => 'cards.css', 'rel' => 'stylesheet']), h::script(['src' => '//code.jquery.com/jquery-1.12.0.min.js']), h::script(['src' => 'cards.js'])), h::body(h::raw($aggregator->render($feeds)), h::footer(h::form(['method' => 'POST'], h::input(['name' => 'newFeed']), h::button(['ype' => 'submit'], 'Add feed')))));
}
function testCacheMultiple()
{
$headerString = <<<EOF
HTTP/1.1 200 OK
Cache-Control: public
Cache-Control: max-age=300,s-maxage=900
EOF;
$headers = \arc\http\headers::parse($headerString);
$cachetime = \arc\http\headers::parseCacheTime($headers);
$this->assertEquals(300, $cachetime);
}
<?php
require __DIR__ . '/../vendor/autoload.php';
use arc\html as h;
use arc\xml as x;
$client = \arc\cache::proxy(\arc\http::client(), function ($params) {
return \arc\http\headers::parseCacheTime($params['target']->responseHeaders);
});
$feed = $client->get('https://www.nasa.gov/rss/dyn/breaking_news.rss');
try {
$rss = x::parse($feed);
} catch (\Exception $e) {
$rss = h::parse($feed);
}
$items = $rss->find('item');
foreach ($items as $item) {
echo h::article(h::h2(h::a(['href' => $item->link->nodeValue], $item->title->nodeValue)), h::div(['class' => 'body'], $item->description->nodeValue));
}
/**
* Parse response headers to determine if and how long you may cache the response. Doesn't understand ETags.
* @param string|string[] $headers Headers string or array as returned by parse()
* @param bool $private Whether to store a private cache or public cache image.
* @return int The number of seconds you may cache this result starting from now.
*/
public static function parseCacheTime($headers, $private = true)
{
$result = null;
if (is_string($headers) || !isset($headers['Cache-Control']) && !isset($headers['Expires'])) {
$headers = \arc\http\headers::parse($headers);
}
if (isset($headers['Cache-Control'])) {
$header = self::mergeHeaders($headers['Cache-Control']);
$result = self::getCacheControlTime($header, $private);
}
if (!isset($result) && isset($headers['Expires'])) {
$result = strtotime(self::getLastHeader($headers['Expires'])) - time();
}
return (int) $result;
}
