node-crawlervsroach
node-crawler is a popular web scraping library for Node.js that allows you to easily navigate and extract data from websites. It has a simple API and supports concurrency, making it efficient for scraping large numbers of pages.
Features:
- Server-side DOM & automatic jQuery insertion with Cheerio (default) or JSDOM,
- Configurable pool size and retries,
- Control rate limit,
- Priority queue of requests,
- forceUTF8 mode to let crawler deal for you with charset detection and conversion,
- Compatible with 4.x or newer version.
- Http2 support
- Proxy support
Roach is a complete web scraping toolkit for PHP. It is heavily inspired by the popular Scrapy package for Python.
Roach allows us to define spiders that crawl and scrape web documents. Roach isn’t just a simple crawler, but includes an entire pipeline to clean, persist and otherwise process extracted data as well.
Just like scrapy, Roach supports: - Middlewares - Item Pipelines - Extendibility through Plugins
It’s your all-in-one resource for web scraping in PHP.
Example Use
const Crawler = require('crawler');
const c = new Crawler({
maxConnections: 10,
// This will be called for each crawled page
callback: (error, res, done) => {
if (error) {
console.log(error);
} else {
const $ = res.$;
// $ is Cheerio by default
//a lean implementation of core jQuery designed specifically for the server
console.log($('title').text());
}
done();
}
});
// Queue just one URL, with default callback
c.queue('http://www.amazon.com');
// Queue a list of URLs
c.queue(['http://www.google.com/','http://www.yahoo.com']);
// Queue URLs with custom callbacks & parameters
c.queue([{
uri: 'http://parishackers.org/',
jQuery: false,
// The global callback won't be called
callback: (error, res, done) => {
if (error) {
console.log(error);
} else {
console.log('Grabbed', res.body.length, 'bytes');
}
done();
}
}]);
// Queue some HTML code directly without grabbing (mostly for tests)
c.queue([{
html: '<p>This is a <strong>test</strong></p>'
}]);
<?php
use RoachPHP\Http\Response;
use RoachPHP\Spider\BasicSpider;
class RoachDocsSpider extends BasicSpider
{
/**
* @var string[]
*/
public array $startUrls = [
'https://roach-php.dev/docs/spiders'
];
public function parse(Response $response): \Generator
{
$title = $response->filter('h1')->text();
$subtitle = $response
->filter('main > div:nth-child(2) p:first-of-type')
->text();
yield $this->item([
'title' => $title,
'subtitle' => $subtitle,
]);
}
}