/**
* Adds the imported style sheets to the web
* @param zibo\library\spider\Web $web The spider web
* @param zibo\library\spider\WebNode $prey The current prey in the web
* @param string $baseUrl Base URL of the crawl
* @param string $preyBaseUrl Base URL of the prey
* @param zibo\library\xml\dom\Document $dom The DOM document of the current prey
* @return null
*/
public function bite(Web $web, WebNode $prey, $baseUrl, $preyBaseUrl, Document $dom = null)
{
if (!$prey->hasType(WebNode::TYPE_CSS)) {
return;
}
$response = $prey->getResponse();
if (!$response || $response->getResponseCode() != 200) {
return;
}
$source = $response->getContent();
if (!$source) {
return;
}
$urls = $this->getImportUrlsFromStyle($source, $baseUrl, $preyBaseUrl);
foreach ($urls as $url) {
$link = $web->getNode($url);
$link->addType(WebNode::TYPE_CSS);
$link->addReference($prey);
$prey->addLink($link);
}
}
/**
* Bites a prey to gather the needed information
* @param WebNode $prey The current node to check
* @param string $preyBaseUrl The base URL of the prey
* @param string $preyBasePath The base path of the prey
* @return null
*/
private function bite(WebNode $prey, $preyBaseUrl, $preyBasePath)
{
$dom = null;
$response = $prey->getResponse();
$contentType = $response->getHeader('Content-Type');
$content = $response->getContent();
if (String::startsWith($contentType, 'text/html') && $content) {
$dom = new Document('1.0', 'utf8');
try {
$result = @$dom->loadHTML($content);
if (!$result) {
$error = error_get_last();
throw new Exception($error['message']);
}
} catch (Exception $exception) {
$prey->setError($exception->getMessage());
}
}
foreach ($this->bites as $bite) {
$bite->bite($this->web, $prey, $preyBaseUrl, $preyBasePath, $dom);
}
}
