/**
* Function that crawls one webpage based on the give url.
*
* @param \Simgroep\ConcurrentSpiderBundle\CrawlJob $crawlJob
*/
public function crawl(CrawlJob $crawlJob)
{
$this->currentCrawlJob = $crawlJob;
$resource = $this->requestHandler->request(new Uri($crawlJob->getUrl()));
$uris = [];
$this->eventDispatcher->dispatch(SpiderEvents::SPIDER_CRAWL_PRE_DISCOVER);
$crawler = $resource->getCrawler()->filterXPath('//a');
foreach ($crawler as $node) {
try {
$href = $node->getAttribute('href');
$baseUrl = $resource->getUri()->toString();
$uri = new Uri($href, $baseUrl);
$uris[] = $uri;
} catch (UriSyntaxException $e) {
//too bad
}
}
$this->eventDispatcher->dispatch(SpiderEvents::SPIDER_CRAWL_POST_DISCOVER, new GenericEvent($this, ['uris' => $uris]));
$this->persistenceHandler->persist($resource, $crawlJob);
}
/**
* Function that crawls one webpage based on the give url.
*
* @param \Simgroep\ConcurrentSpiderBundle\CrawlJob $crawlJob
*/
public function crawl(CrawlJob $crawlJob)
{
$this->currentCrawlJob = $crawlJob;
$resource = $this->requestHandler->request(new Uri($crawlJob->getUrl()));
if ($resource->getResponse()->getStatusCode() == 301) {
$exception = new ClientErrorResponseException(sprintf("Page moved to %s", $resource->getResponse()->getInfo('redirect_url')), 301);
$exception->setResponse($resource->getResponse());
throw $exception;
}
$uris = [];
$this->eventDispatcher->dispatch(SpiderEvents::SPIDER_CRAWL_PRE_DISCOVER);
$baseUrl = $resource->getUri()->toString();
$crawler = $resource->getCrawler()->filterXPath('//a');
foreach ($crawler as $node) {
try {
if ($node->getAttribute("rel") === "nofollow") {
continue;
}
$href = $node->getAttribute('href');
$uri = new Uri($href, $baseUrl);
$uris[] = $uri;
} catch (UriSyntaxException $e) {
//too bad
}
}
$crawler = $resource->getCrawler()->filterXPath('//loc');
foreach ($crawler as $node) {
try {
$href = $node->nodeValue;
$uri = new Uri($href, $baseUrl);
$uris[] = $uri;
} catch (UriSyntaxException $e) {
//too bad
}
}
$this->eventDispatcher->dispatch(SpiderEvents::SPIDER_CRAWL_POST_DISCOVER, new GenericEvent($this, ['uris' => $uris]));
$this->persistenceHandler->persist($resource, $crawlJob);
}