// The URI we want to start crawling with
$seed = 'http://www.dmoz.org/Computers/Internet/';
// We want to allow all subdomains of dmoz.org
$allowSubDomains = true;
// Create spider
$spider = new Spider($seed);
$spider->getDownloader()->setDownloadLimit(10);
$statsHandler = new StatsHandler();
$LogHandler = new LogHandler();
$queueManager = new InMemoryQueueManager();
$queueManager->getDispatcher()->addSubscriber($statsHandler);
$queueManager->getDispatcher()->addSubscriber($LogHandler);
// Set some sane defaults for this example. We only visit the first level of www.dmoz.org. We stop at 10 queued resources
$spider->getDiscovererSet()->maxDepth = 1;
// This time, we set the traversal algorithm to breadth-first. The default is depth-first
$queueManager->setTraversalAlgorithm(InMemoryQueueManager::ALGORITHM_BREADTH_FIRST);
$spider->setQueueManager($queueManager);
// We add an URI discoverer. Without it, the spider wouldn't get past the seed resource.
$spider->getDiscovererSet()->set(new XPathExpressionDiscoverer("//div[@class='dir-1 borN'][2]//a"));
// Let's tell the spider to save all found resources on the filesystem
$spider->getDownloader()->setPersistenceHandler(new \VDB\Spider\PersistenceHandler\FileSerializedResourcePersistenceHandler(__DIR__ . '/results'));
// Add some prefetch filters. These are executed before a resource is requested.
// The more you have of these, the less HTTP requests and work for the processors
$spider->getDiscovererSet()->addFilter(new AllowedSchemeFilter(array('http')));
$spider->getDiscovererSet()->addFilter(new AllowedHostsFilter(array($seed), $allowSubDomains));
$spider->getDiscovererSet()->addFilter(new UriWithHashFragmentFilter());
$spider->getDiscovererSet()->addFilter(new UriWithQueryStringFilter());
// We add an eventlistener to the crawler that implements a politeness policy. We wait 450ms between every request to the same domain
$politenessPolicyEventListener = new PolitenessPolicyListener(100);
$spider->getDownloader()->getDispatcher()->addListener(SpiderEvents::SPIDER_CRAWL_PRE_REQUEST, array($politenessPolicyEventListener, 'onCrawlPreRequest'));
$spider->getDispatcher()->addSubscriber($statsHandler);
/**
* Start Parsing Urls!
*/
public function startParser()
{
$start = microtime();
$spider = new Spider($this->seed);
if ($this->downloadLimit > 0) {
$spider->getDownloader()->setDownloadLimit($this->downloadLimit);
}
$statsHandler = new StatsHandler();
$LogHandler = new Logger(\Pimcore::inDebugMode());
$queueManager = new InMemoryQueueManager();
$queueManager->getDispatcher()->addSubscriber($statsHandler);
$queueManager->getDispatcher()->addSubscriber($LogHandler);
$spider->getDiscovererSet()->maxDepth = $this->maxLinkDepth;
$queueManager->setTraversalAlgorithm(InMemoryQueueManager::ALGORITHM_BREADTH_FIRST);
$spider->setQueueManager($queueManager);
$spider->getDiscovererSet()->set(new XPathExpressionDiscoverer("//link[@hreflang]|//a[not(@rel='nofollow')]"));
$spider->getDiscovererSet()->addFilter(new AllowedSchemeFilter($this->allowedSchemes));
$spider->getDiscovererSet()->addFilter(new AllowedHostsFilter(array($this->seed), $this->allowSubDomains));
$spider->getDiscovererSet()->addFilter(new UriWithHashFragmentFilter());
$spider->getDiscovererSet()->addFilter(new UriWithQueryStringFilter());
$spider->getDiscovererSet()->addFilter(new UriFilter($this->invalidLinkRegexes));
$spider->getDiscovererSet()->addFilter(new NegativeUriFilter($this->validLinkRegexes));
$politenessPolicyEventListener = new PolitenessPolicyListener(20);
//CHANGE TO 100 !!!!
$spider->getDownloader()->getDispatcher()->addListener(SpiderEvents::SPIDER_CRAWL_PRE_REQUEST, array($politenessPolicyEventListener, 'onCrawlPreRequest'));
$spider->getDispatcher()->addSubscriber($statsHandler);
$spider->getDispatcher()->addSubscriber($LogHandler);
$abortListener = new Listener\Abort($spider);
$spider->getDownloader()->getDispatcher()->addListener(SpiderEvents::SPIDER_CRAWL_PRE_REQUEST, array($abortListener, 'checkCrawlerState'));
$spider->getDispatcher()->addListener(SpiderEvents::SPIDER_CRAWL_USER_STOPPED, array($abortListener, 'stopCrawler'));
if ($this->useAuth) {
$authListener = new Listener\Auth($this->authUserName, $this->authPassword);
$spider->getDownloader()->getDispatcher()->addListener(SpiderEvents::SPIDER_CRAWL_PRE_REQUEST, array($authListener, 'setAuth'));
}
$spider->getDownloader()->getDispatcher()->addListener(SpiderEvents::SPIDER_CRAWL_POST_REQUEST, function (Event $event) {
//echo 'crawling: ' . $event->getArgument('uri')->toString() . "\n";
});
// Execute the crawl
$spider->crawl();
\Pimcore\Logger::debug("SPIDER ID: " . $statsHandler->getSpiderId());
\Pimcore\Logger::debug("SPIDER ID: " . $statsHandler->getSpiderId());
\Pimcore\Logger::debug("ENQUEUED: " . count($statsHandler->getQueued()));
\Pimcore\Logger::debug("SKIPPED: " . count($statsHandler->getFiltered()));
\Pimcore\Logger::debug("FAILED: " . count($statsHandler->getFailed()));
\Pimcore\Logger::debug("PERSISTED: " . count($statsHandler->getPersisted()));
$peakMem = round(memory_get_peak_usage(TRUE) / 1024 / 1024, 2);
$totalTime = round(microtime(TRUE) - $start, 2);
$totalDelay = round($politenessPolicyEventListener->totalDelay / 1000 / 1000, 2);
\Pimcore\Logger::debug("PEAK MEM USAGE: " . $peakMem . 'MB');
\Pimcore\Logger::debug("TOTAL TIME: " . $totalTime . 's');
\Pimcore\Logger::debug("POLITENESS WAIT TIME: " . $totalDelay . 's');
$downloaded = $spider->getDownloader()->getPersistenceHandler();
//parse all resources!
foreach ($downloaded as $resource) {
$this->parseResponse($resource);
}
}