public function testFindLinkXml()
{
$xml = '<feed xmlns="http://www.w3.org/2005/Atom">
<title>Blah blah blah</title>
<link href="http://example.com/feed" rel="self" type="application/atom+xml"/>
<link href="http://example.com" rel="alternate" type="text/html"/>
<link rel="hub" href="http://example.com/hub" />
<updated>2015-02-03T13:08:02+01:00</updated>
<id>http://blog.superfeedr.com/</id></feed>';
$this->assertSame('http://example.com/hub', HttpHelpers::findRelationFromXml($xml, 'hub'));
$xml = '<?xml version="1.0"?>
<rss xmlns:atom="http://www.w3.org/2005/Atom">
<channel>
<atom:link rel="hub" href="http://example.com/hub"/>
</channel></rss>';
$this->assertSame('http://example.com/hub', HttpHelpers::findRelationFromXml($xml, 'hub'));
$this->assertSame(FALSE, HttpHelpers::findRelationFromXml('', 'hub'));
$this->assertSame(FALSE, HttpHelpers::findRelationFromXml(' ', 'hub'));
}
/**
* Finds a hub from a fetcher result.
*
* @param \Drupal\feeds\Result\FetcherResultInterface $fetcher_result
* The fetcher result.
*
* @return string|null
* The hub URL or null if one wasn't found.
*/
protected function findRelation(FetcherResultInterface $fetcher_result, $relation)
{
if ($fetcher_result instanceof HttpFetcherResultInterface) {
if ($rel = HttpHelpers::findLinkHeader($fetcher_result->getHeaders(), $relation)) {
return $rel;
}
}
return HttpHelpers::findRelationFromXml($fetcher_result->getRaw(), $relation);
}