dudevsphp-spider
Dude (dude uncomplicated data extraction) is a very simple framework for writing web scrapers using Python decorators. The design, inspired by Flask, was to easily build a web scraper in just a few lines of code. Dude has an easy-to-learn syntax.
The simplest web scraper will look like this: ```python from dude import select
@select(css="a") def get_link(element): return {"url": element.get_attribute("href")} ```
dude supports multiple parser backends:
- playwright
- lxml
- parsel
- beautifulsoup
- pyppeteer
- selenium
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.
Example Use
```python
from dude import select
"""
This example demonstrates how to use Parsel + async HTTPX
To access an attribute, use:
selector.attrib["href"]
You can also access an attribute using the ::attr(name) pseudo-element, for example "a::attr(href)", then:
selector.get()
To get the text, use ::text pseudo-element, then:
selector.get()
"""
@select(css="a.url", priority=2)
async def result_url(selector):
return {"url": selector.attrib["href"]}
# Option to get url using ::attr(name) pseudo-element
@select(css="a.url::attr(href)", priority=2)
async def result_url2(selector):
return {"url2": selector.get()}
@select(css=".title::text", priority=1)
async def result_title(selector):
return {"title": selector.get()}
@select(css=".description::text", priority=0)
async def result_description(selector):
return {"description": selector.get()}
if __name__ == "__main__":
import dude
dude.run(urls=["https://dude.ron.sh"], parser="parsel")
```
```php
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 tags from a certain
$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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