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autoscrapervsphp-spider

MIT 11 2 5,772
3.5 thousand (month) Jul 26 2019 1.1.14(1 year, 7 months ago)
1,314 1 3 MIT
v0.7.2(2 months ago) Mar 16 2013 70 (month)

Autoscraper project is made for automatic web scraping to make scraping easy. It gets a url or the html content of a web page and a list of sample data which we want to scrape from that page. This data can be text, url or any html tag value of that page. It learns the scraping rules and returns the similar elements. Then you can use this learned object with new urls to get similar content or the exact same element of those new pages.

Autoscraper is minimalistic and auto-generative approach to web scraping. For example, here's a scraper that finds all titles on a stackoverflow.com page:

from autoscraper import AutoScraper

url = 'https://stackoverflow.com/questions/2081586/web-scraping-with-python'

# We can add one or multiple candidates here.
# You can also put urls here to retrieve urls.
wanted_list = ["What are metaclasses in Python?"]

scraper = AutoScraper()
result = scraper.build(url, wanted_list)
print(result)

php-spider is a PHP library for web crawling and scraping. It allows developers to easily navigate and extract data from websites by simulating a web browser's behavior.

  • supports two traversal algorithms: breadth-first and depth-first
  • supports crawl depth limiting, queue size limiting and max downloads limiting
  • supports adding custom URI discovery logic, based on XPath, CSS selectors, or plain old PHP
  • comes with a useful set of URI filters, such as Domain limiting
  • supports custom URI filters, both prefetch (URI) and postfetch (Resource content)
  • supports custom request handling logic
  • supports Basic, Digest and NTLM HTTP authentication. See example.
  • comes with a useful set of persistence handlers (memory, file)
  • supports custom persistence handlers
  • collects statistics about the crawl for reporting
  • dispatches useful events, allowing developers to add even more custom behavior
  • supports a politeness policy

This Spider does not support Javascript.

Highlights


popularminimalisticauto-generating

Example Use


use Example\StatsHandler;
use VDB\Spider\Discoverer\XPathExpressionDiscoverer;
use Symfony\Contracts\EventDispatcher\Event;
use VDB\Spider\Event\SpiderEvents;
use VDB\Spider\Spider;

require_once('example_complex_bootstrap.php');

// Create Spider
$spider = new Spider('http://dmoztools.net');

// Add a URI discoverer. Without it, the spider does nothing. In this case, we want <a> tags from a certain <div>
$spider->getDiscovererSet()->set(new XPathExpressionDiscoverer("//div[@id='catalogs']//a"));

// Set some sane options for this example. In this case, we only get the first 10 items from the start page.
$spider->getDiscovererSet()->maxDepth = 1;
$spider->getQueueManager()->maxQueueSize = 10;

// Let's add something to enable us to stop the script
$spider->getDispatcher()->addListener(
    SpiderEvents::SPIDER_CRAWL_USER_STOPPED,
    function (Event $event) {
        echo "\nCrawl aborted by user.\n";
        exit();
    }
);

// Add a listener to collect stats to the Spider and the QueueMananger.
// There are more components that dispatch events you can use.
$statsHandler = new StatsHandler();
$spider->getQueueManager()->getDispatcher()->addSubscriber($statsHandler);
$spider->getDispatcher()->addSubscriber($statsHandler);

// Execute crawl
$spider->crawl();

// Build a report
echo "\n  ENQUEUED:  " . count($statsHandler->getQueued());
echo "\n  SKIPPED:   " . count($statsHandler->getFiltered());
echo "\n  FAILED:    " . count($statsHandler->getFailed());
echo "\n  PERSISTED:    " . count($statsHandler->getPersisted());

// Finally we could do some processing on the downloaded resources
// In this example, we will echo the title of all resources
echo "\n\nDOWNLOADED RESOURCES: ";
foreach ($spider->getDownloader()->getPersistenceHandler() as $resource) {
    echo "\n - " . $resource->getCrawler()->filterXpath('//title')->text();
}

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