BRJ organisation

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Web crawler

Simply library for crawling websites by following links with minimal dependencies.

Czech documentation

📦 Installation

It's best to use Composer for installation, and you can also find the package on Packagist and GitHub.

To install, simply use the command:

$ composer require baraja-core/webcrawler

You can use the package manually by creating an instance of the internal classes, or register a DIC extension to link the services directly to the Nette Framework.

How to use

Crawler can run without dependencies.

In default settings create instance and call crawl() method:

$crawler = new \Baraja\WebCrawler\Crawler;

$result = $crawler->crawl('https://example.com');

In $result variable will be entity of type CrawledResult.

Advanced checking of multiple URLs

In real case you need download multiple URLs in single domain and check if some specific URLs works.

Simple example:

$crawler = new \Baraja\WebCrawler\Crawler;

$result = $crawler->crawlList(
    'https://example.com', // Starting (main) URL
    [ // Additional URLs
        'https://example.com/error-404',
        '/robots.txt', // Relative links are also allowed
        '/web.config',
    ]
);

Notice: File robots.txt and sitemap will be downloaded automatically if exist.

Settings

In constructor of service Crawler you can define your project specific configuration.

Simply like:

$crawler = new \Baraja\WebCrawler\Crawler(
    new \Baraja\WebCrawler\Config([
        // key => value
    ])
);

No one value is required. Please use as key-value array.

Configuration options:

Option	Default value	Possible values
followExternalLinks	false	Bool: Stay only in given domain?
sleepBetweenRequests	1000	Int: Sleep in milliseconds.
maxHttpRequests	1000000	Int: Crawler budget limit.
maxCrawlTimeInSeconds	30	Int: Stop crawling when limit is exceeded.
allowedUrls	['.+']	String[]: List of valid regex about allowed URL format.
forbiddenUrls	['']	String[]: List of valid regex about banned URL format.

📄 License

baraja-core/webcrawler is licensed under the MIT license. See the LICENSE file for more details.