Crawler::handleResponse() - Code Metrics - Inspection of "v4 (#122)" - spatie/crawler - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Push — master ( 080942...71105f )

by Freek

created 2018-03-01 15:17 UTC

Crawler::handleResponse() A

↳ Parent: Crawler

Complexity

Conditions	2
Paths	2

Size

Total Lines	6
Code Lines	3

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
c	0
b	0
f	0
dl	0
loc	6
rs	9.4285
cc	2
eloc	3
nc	2
nop	2

<?php

namespace Spatie\Crawler;

use Generator;
use Tree\Node\Node;
use GuzzleHttp\Pool;
use GuzzleHttp\Client;
use GuzzleHttp\Psr7\Uri;
use GuzzleHttp\Psr7\Request;
use InvalidArgumentException;
use GuzzleHttp\RequestOptions;
use Psr\Http\Message\UriInterface;
use Spatie\Browsershot\Browsershot;
use Psr\Http\Message\StreamInterface;
use Symfony\Component\DomCrawler\Link;
use Psr\Http\Message\ResponseInterface;
use Spatie\Crawler\CrawlQueue\CrawlQueue;
use Tightenco\Collect\Support\Collection;
use GuzzleHttp\Exception\RequestException;
use Spatie\Crawler\CrawlQueue\CollectionCrawlQueue;
use Symfony\Component\DomCrawler\Crawler as DomCrawler;

class Crawler
{
    /** @var \GuzzleHttp\Client */
    protected $client;

    /** @var \Psr\Http\Message\UriInterface */
    protected $baseUrl;

    /** @var array[\Spatie\Crawler\CrawlObserver] */
    protected $crawlObservers;

    /** @var \Spatie\Crawler\CrawlProfile */
    protected $crawlProfile;

    /** @var int */
    protected $concurrency;

    /** @var \Spatie\Crawler\CrawlQueue\CrawlQueue */
    protected $crawlQueue;

    /** @var int */
    protected $crawledUrlCount = 0;

    /** @var int|null */
    protected $maximumCrawlCount = null;

    /** @var int */
    protected $maximumResponseSize = 1024 * 1024 * 2;

    /** @var int|null */
    protected $maximumDepth = null;

    /** @var \Tree\Node\Node */
    protected $depthTree;

    /** @var bool */
    protected $executeJavaScript = false;

    /** @var Browsershot */
    protected $browsershot = null;

    protected static $defaultClientOptions = [
        RequestOptions::COOKIES => true,
        RequestOptions::CONNECT_TIMEOUT => 10,
        RequestOptions::TIMEOUT => 10,
        RequestOptions::ALLOW_REDIRECTS => false,
    ];

    /**
     * @param array $clientOptions
     *
     * @return static
     */
    public static function create(array $clientOptions = [])
    {
        $clientOptions = (count($clientOptions))
            ? $clientOptions
            : self::$defaultClientOptions;

        $client = new Client($clientOptions);

        return new static($client);
    }

    public function __construct(Client $client, int $concurrency = 10)
    {
        $this->client = $client;

        $this->concurrency = $concurrency;

        $this->crawlProfile = new CrawlAllUrls();

        $this->crawlQueue = new CollectionCrawlQueue();
    }

    /**
     * @param int $concurrency
     *
     * @return $this
     */
    public function setConcurrency(int $concurrency)
    {
        $this->concurrency = $concurrency;

        return $this;
    }

    /**
     * Responses that are larger that then specified value will be ignored.
     *
     * @param int $maximumResponseSizeInBytes
     *
     * @return $this
     */
    public function setMaximumResponseSize(int $maximumResponseSizeInBytes)
    {
        $this->maximumResponseSize = $maximumResponseSizeInBytes;

        return $this;
    }

    /**
     * @param int $maximumCrawlCount
     *
     * @return $this
     */
    public function setMaximumCrawlCount(int $maximumCrawlCount)
    {
        $this->maximumCrawlCount = $maximumCrawlCount;

        return $this;
    }

    /**
     * @param int $maximumDepth
     *
     * @return $this
     */
    public function setMaximumDepth(int $maximumDepth)
    {
        $this->maximumDepth = $maximumDepth;

        return $this;
    }

    /**
     * @param CrawlQueue $crawlQueue
     * @return $this
     */
    public function setCrawlQueue(CrawlQueue $crawlQueue)
    {
        $this->crawlQueue = $crawlQueue;

        return $this;
    }

    /**
     * @return $this
     */
    public function executeJavaScript()
    {
        $this->executeJavaScript = true;

        return $this;
    }

    /**
     * @return $this
     */
    public function doNotExecuteJavaScript()
    {
        $this->executeJavaScript = false;

        return $this;
    }

    /**
     * @param \Spatie\Crawler\CrawlObserver|array[\Spatie\Crawler\CrawlObserver] $crawlObservers

     *
     * @return $this
     */
    public function setCrawlObserver($crawlObservers)
    {
        if (! is_array($crawlObservers)) {
            $crawlObservers = [$crawlObservers];
        }

        return $this->setCrawlObservers($crawlObservers);
    }

    public function setCrawlObservers(array $crawlObservers)
    {
        $this->crawlObservers = $crawlObservers;

        return $this;
    }

    public function addCrawlObserver(CrawlObserver $crawlObserver)
    {
        $this->crawlObservers[] = $crawlObserver;

        return $this;
    }

    /**
     * @param \Spatie\Crawler\CrawlProfile $crawlProfile
     *
     * @return $this
     */
    public function setCrawlProfile(CrawlProfile $crawlProfile)
    {
        $this->crawlProfile = $crawlProfile;

        return $this;
    }

    /**
     * @param \Psr\Http\Message\UriInterface|string $baseUrl
     */
    public function startCrawling($baseUrl)
    {
        if (! $baseUrl instanceof UriInterface) {
            $baseUrl = new Uri($baseUrl);
        }

        if ($baseUrl->getScheme() === '') {
            $baseUrl = $baseUrl->withScheme('http');
        }

        if ($baseUrl->getPath() === '') {
            $baseUrl = $baseUrl->withPath('/');
        }

        $this->baseUrl = $baseUrl;

        $crawlUrl = CrawlUrl::create($this->baseUrl);

        $this->addToCrawlQueue($crawlUrl);

        $this->depthTree = new Node((string) $this->baseUrl);

        $this->startCrawlingQueue();

        foreach ($this->crawlObservers as $crawlObserver) {
            $crawlObserver->finishedCrawling();
        }
    }

    protected function startCrawlingQueue()
    {
        while ($this->crawlQueue->hasPendingUrls()) {
            $pool = new Pool($this->client, $this->getCrawlRequests(), [
                'concurrency' => $this->concurrency,
                'options' => $this->client->getConfig(),
                'fulfilled' => function (ResponseInterface $response, int $index) {
                    $crawlUrl = $this->crawlQueue->getUrlById($index);
                    $this->handleCrawled($response, $crawlUrl);

                    if (! $this->crawlProfile instanceof CrawlSubdomains) {
                        if ($crawlUrl->url->getHost() !== $this->baseUrl->getHost()) {
                            return;
                        }
                    }

                    $body = $this->convertBodyToString($response->getBody(), $this->maximumResponseSize);

                    $this->addAllLinksToCrawlQueue(
                        $body,
                        $crawlUrl->url
                    );
                },
                'rejected' => function (RequestException $exception, int $index) {
                    $this->handleCrawlFailed(
                        $exception,
                        $this->crawlQueue->getUrlById($index),
                        $exception

                    );
                },
            ]);

            $promise = $pool->promise();
            $promise->wait();
        }
    }

    public function endsWith($haystack, $needle)
    {
        return strrpos($haystack, $needle) + strlen($needle) ===
            strlen($haystack);
    }

    protected function convertBodyToString(StreamInterface $bodyStream, $readMaximumBytes = 1024 * 1024 * 2): string
    {
        $bodyStream->rewind();

        $body = $bodyStream->read($readMaximumBytes);

        return $body;
    }

    /**
     * @param ResponseInterface|null $response
     * @param CrawlUrl $crawlUrl
     */
    protected function handleCrawled(ResponseInterface $response, CrawlUrl $crawlUrl)
    {
        foreach ($this->crawlObservers as $crawlObserver) {
            $crawlObserver->crawled(
                $crawlUrl->url,
                $response,
                $crawlUrl->foundOnUrl
            );
        }
    }

    /**
     * @param RequestException $exception
     * @param CrawlUrl $crawlUrl
     */
    protected function handleCrawlFailed(RequestException $exception, CrawlUrl $crawlUrl)
    {
        foreach ($this->crawlObservers as $crawlObserver) {
            $crawlObserver->crawlFailed(
                $crawlUrl->url,
                $exception,
                $crawlUrl->foundOnUrl
            );
        }
    }

    protected function getCrawlRequests(): Generator
    {
        while ($crawlUrl = $this->crawlQueue->getFirstPendingUrl()) {
            if (! $this->crawlProfile->shouldCrawl($crawlUrl->url)) {
                $this->crawlQueue->markAsProcessed($crawlUrl);
                continue;
            }

            if ($this->crawlQueue->hasAlreadyBeenProcessed($crawlUrl)) {
                continue;
            }

            foreach ($this->crawlObservers as $crawlObserver) {
                $crawlObserver->willCrawl($crawlUrl->url);
            }

            $this->crawlQueue->markAsProcessed($crawlUrl);

            yield $crawlUrl->getId() => new Request('GET', $crawlUrl->url);
        }
    }

    protected function addAllLinksToCrawlQueue(string $html, UriInterface $foundOnUrl)
    {
        $allLinks = $this->extractAllLinks($html, $foundOnUrl);

        collect($allLinks)
            ->filter(function (UriInterface $url) {
                return $this->hasCrawlableScheme($url);
            })
            ->map(function (UriInterface $url) {
                return $this->normalizeUrl($url);
            })
            ->filter(function (UriInterface $url) {
                return $this->crawlProfile->shouldCrawl($url);
            })
            ->reject(function (UriInterface $url) {
                return $this->crawlQueue->has($url);
            })
            ->each(function (UriInterface $url) use ($foundOnUrl) {
                $node = $this->addtoDepthTree($this->depthTree, $url, $foundOnUrl);

                if (strpos($url->getPath(), '/tel:') === 0) {
                    return;
                }

                if (! $this->shouldCrawl($node)) {
                    return;
                }

                if ($this->maximumCrawlCountReached()) {
                    return;
                }

                $crawlUrl = CrawlUrl::create($url, $foundOnUrl);

                $this->addToCrawlQueue($crawlUrl);
            });
    }

    protected function shouldCrawl(Node $node): bool
    {
        if (is_null($this->maximumDepth)) {
            return true;
        }

        return $node->getDepth() <= $this->maximumDepth;
    }

    protected function extractAllLinks(string $html, UriInterface $foundOnUrl): Collection
    {
        if ($this->executeJavaScript) {
            $html = $this->getBodyAfterExecutingJavaScript($foundOnUrl);
        }

        $domCrawler = new DomCrawler($html, $foundOnUrl);

        return collect($domCrawler->filterXpath('//a')->links())
            ->map(function (Link $link) {
                try {
                    return new Uri($link->getUri());
                } catch (InvalidArgumentException $exception) {
                    return;
                }
            })
            ->filter();
    }

    protected function normalizeUrl(UriInterface $url): UriInterface
    {
        return $url->withFragment('');
    }

    protected function hasCrawlableScheme(UriInterface $uri): bool
    {
        return in_array($uri->getScheme(), ['http', 'https']);
    }

    protected function addtoDepthTree(Node $node, UriInterface $url, UriInterface $parentUrl)
    {
        $returnNode = null;

        if ($node->getValue() === (string) $parentUrl) {
            $newNode = new Node((string) $url);

            $node->addChild($newNode);

            return $newNode;
        }

        foreach ($node->getChildren() as $currentNode) {
            $returnNode = $this->addToDepthTree($currentNode, $url, $parentUrl);

            if (! is_null($returnNode)) {
                break;
            }
        }

        return $returnNode;
    }

    protected function getBodyAfterExecutingJavaScript(UriInterface $foundOnUrl): string
    {
        $browsershot = $this->getBrowsershot();

        $html = $browsershot->setUrl((string) $foundOnUrl)->bodyHtml();

        return html_entity_decode($html);
    }

    protected function getBrowsershot(): Browsershot
    {
        if ($this->browsershot) {
            return $this->browsershot;
        }

        $this->browsershot = new Browsershot();

        return $this->browsershot;
    }

    public function setBrowsershot(Browsershot $browsershot)
    {
        $this->browsershot = $browsershot;

        return $this;
    }

    protected function addToCrawlQueue(CrawlUrl $crawlUrl)
    {
        $this->crawledUrlCount++;

        $this->crawlQueue->add($crawlUrl);

        return $this;
    }

    protected function maximumCrawlCountReached(): bool
    {
        if (is_null($this->maximumCrawlCount)) {
            return false;
        }

        return $this->crawledUrlCount >= $this->maximumCrawlCount;
    }
}


1			<?php
2
3			namespace Spatie\Crawler;
4
5			use Generator;
6			use Tree\Node\Node;
7			use GuzzleHttp\Pool;
8			use GuzzleHttp\Client;
9			use GuzzleHttp\Psr7\Uri;
10			use GuzzleHttp\Psr7\Request;
11			use InvalidArgumentException;
12			use GuzzleHttp\RequestOptions;
13			use Psr\Http\Message\UriInterface;
14			use Spatie\Browsershot\Browsershot;
15			use Psr\Http\Message\StreamInterface;
16			use Symfony\Component\DomCrawler\Link;
17			use Psr\Http\Message\ResponseInterface;
18			use Spatie\Crawler\CrawlQueue\CrawlQueue;
19			use Tightenco\Collect\Support\Collection;
20			use GuzzleHttp\Exception\RequestException;
21			use Spatie\Crawler\CrawlQueue\CollectionCrawlQueue;
22			use Symfony\Component\DomCrawler\Crawler as DomCrawler;
23
24			class Crawler
25			{
26			/** @var \GuzzleHttp\Client */
27			protected $client;
28
29			/** @var \Psr\Http\Message\UriInterface */
30			protected $baseUrl;
31
32			/** @var array[\Spatie\Crawler\CrawlObserver] */
33			protected $crawlObservers;
34
35			/** @var \Spatie\Crawler\CrawlProfile */
36			protected $crawlProfile;
37
38			/** @var int */
39			protected $concurrency;
40
41			/** @var \Spatie\Crawler\CrawlQueue\CrawlQueue */
42			protected $crawlQueue;
43
44			/** @var int */
45			protected $crawledUrlCount = 0;
46
47			/** @var int\|null */
48			protected $maximumCrawlCount = null;
49
50			/** @var int */
51			protected $maximumResponseSize = 1024 * 1024 * 2;
52
53			/** @var int\|null */
54			protected $maximumDepth = null;
55
56			/** @var \Tree\Node\Node */
57			protected $depthTree;
58
59			/** @var bool */
60			protected $executeJavaScript = false;
61
62			/** @var Browsershot */
63			protected $browsershot = null;
64
65			protected static $defaultClientOptions = [
66			RequestOptions::COOKIES => true,
67			RequestOptions::CONNECT_TIMEOUT => 10,
68			RequestOptions::TIMEOUT => 10,
69			RequestOptions::ALLOW_REDIRECTS => false,
70			];
71
72			/**
73			* @param array $clientOptions
74			*
75			* @return static
76			*/
77			public static function create(array $clientOptions = [])
78			{
79			$clientOptions = (count($clientOptions))
80			? $clientOptions
81			: self::$defaultClientOptions;
82
83			$client = new Client($clientOptions);
84
85			return new static($client);
86			}
87
88			public function __construct(Client $client, int $concurrency = 10)
89			{
90			$this->client = $client;
91
92			$this->concurrency = $concurrency;
93
94			$this->crawlProfile = new CrawlAllUrls();
95
96			$this->crawlQueue = new CollectionCrawlQueue();
97			}
98
99			/**
100			* @param int $concurrency
101			*
102			* @return $this
103			*/
104			public function setConcurrency(int $concurrency)
105			{
106			$this->concurrency = $concurrency;
107
108			return $this;
109			}
110
111			/**
112			* Responses that are larger that then specified value will be ignored.
113			*
114			* @param int $maximumResponseSizeInBytes
115			*
116			* @return $this
117			*/
118			public function setMaximumResponseSize(int $maximumResponseSizeInBytes)
119			{
120			$this->maximumResponseSize = $maximumResponseSizeInBytes;
121
122			return $this;
123			}
124
125			/**
126			* @param int $maximumCrawlCount
127			*
128			* @return $this
129			*/
130			public function setMaximumCrawlCount(int $maximumCrawlCount)
131			{
132			$this->maximumCrawlCount = $maximumCrawlCount;
133
134			return $this;
135			}
136
137			/**
138			* @param int $maximumDepth
139			*
140			* @return $this
141			*/
142			public function setMaximumDepth(int $maximumDepth)
143			{
144			$this->maximumDepth = $maximumDepth;
145
146			return $this;
147			}
148
149			/**
150			* @param CrawlQueue $crawlQueue
151			* @return $this
152			*/
153			public function setCrawlQueue(CrawlQueue $crawlQueue)
154			{
155			$this->crawlQueue = $crawlQueue;
156
157			return $this;
158			}
159
160			/**
161			* @return $this
162			*/
163			public function executeJavaScript()
164			{
165			$this->executeJavaScript = true;
166
167			return $this;
168			}
169
170			/**
171			* @return $this
172			*/
173			public function doNotExecuteJavaScript()
174			{
175			$this->executeJavaScript = false;
176
177			return $this;
178			}
179
180			/**
181			* @param \Spatie\Crawler\CrawlObserver\|array[\Spatie\Crawler\CrawlObserver] $crawlObservers
			0 ignored issues – show Documentation introduced 2018-01-25 20:52 UTC by Report Bug Copy Issue Report The doc-type `\Spatie\Crawler\CrawlObs...\Crawler\CrawlObserver]` could not be parsed: Expected "]" at position 4, but found "\Spatie\Crawler\CrawlObserver". (view supported doc-types) This check marks PHPDoc comments that could not be parsed by our parser. To see which comment annotations we can parse, please refer to our documentation on supported doc-types. Loading history...
182			*
183			* @return $this
184			*/
185			public function setCrawlObserver($crawlObservers)
186			{
187			if (! is_array($crawlObservers)) {
188			$crawlObservers = [$crawlObservers];
189			}
190
191			return $this->setCrawlObservers($crawlObservers);
192			}
193
194			public function setCrawlObservers(array $crawlObservers)
195			{
196			$this->crawlObservers = $crawlObservers;
197
198			return $this;
199			}
200
201			public function addCrawlObserver(CrawlObserver $crawlObserver)
202			{
203			$this->crawlObservers[] = $crawlObserver;
204
205			return $this;
206			}
207
208			/**
209			* @param \Spatie\Crawler\CrawlProfile $crawlProfile
210			*
211			* @return $this
212			*/
213			public function setCrawlProfile(CrawlProfile $crawlProfile)
214			{
215			$this->crawlProfile = $crawlProfile;
216
217			return $this;
218			}
219
220			/**
221			* @param \Psr\Http\Message\UriInterface\|string $baseUrl
222			*/
223			public function startCrawling($baseUrl)
224			{
225			if (! $baseUrl instanceof UriInterface) {
226			$baseUrl = new Uri($baseUrl);
227			}
228
229			if ($baseUrl->getScheme() === '') {
230			$baseUrl = $baseUrl->withScheme('http');
231			}
232
233			if ($baseUrl->getPath() === '') {
234			$baseUrl = $baseUrl->withPath('/');
235			}
236
237			$this->baseUrl = $baseUrl;
238
239			$crawlUrl = CrawlUrl::create($this->baseUrl);
240
241			$this->addToCrawlQueue($crawlUrl);
242
243			$this->depthTree = new Node((string) $this->baseUrl);
244
245			$this->startCrawlingQueue();
246
247			foreach ($this->crawlObservers as $crawlObserver) {
248			$crawlObserver->finishedCrawling();
249			}
250			}
251
252			protected function startCrawlingQueue()
253			{
254			while ($this->crawlQueue->hasPendingUrls()) {
255			$pool = new Pool($this->client, $this->getCrawlRequests(), [
256			'concurrency' => $this->concurrency,
257			'options' => $this->client->getConfig(),
258			'fulfilled' => function (ResponseInterface $response, int $index) {
259			$crawlUrl = $this->crawlQueue->getUrlById($index);
260			$this->handleCrawled($response, $crawlUrl);
261
262			if (! $this->crawlProfile instanceof CrawlSubdomains) {
263			if ($crawlUrl->url->getHost() !== $this->baseUrl->getHost()) {
264			return;
265			}
266			}
267
268			$body = $this->convertBodyToString($response->getBody(), $this->maximumResponseSize);
269
270			$this->addAllLinksToCrawlQueue(
271			$body,
272			$crawlUrl->url
273			);
274			},
275			'rejected' => function (RequestException $exception, int $index) {
276			$this->handleCrawlFailed(
277			$exception,
278			$this->crawlQueue->getUrlById($index),
279			$exception
			0 ignored issues – show Unused Code introduced 2018-02-28 11:45 UTC by Report Bug Copy Issue Report The call to `Crawler::handleCrawlFailed()` has too many arguments starting with `$exception`. This check compares calls to functions or methods with their respective definitions. If the call has more arguments than are defined, it raises an issue. If a function is defined several times with a different number of parameters, the check may pick up the wrong definition and report false positives. One codebase where this has been known to happen is Wordpress. In this case you can add the `@ignore` PhpDoc annotation to the duplicate definition and it will be ignored. Loading history...
280			);
281			},
282			]);
283
284			$promise = $pool->promise();
285			$promise->wait();
286			}
287			}
288
289			public function endsWith($haystack, $needle)
290			{
291			return strrpos($haystack, $needle) + strlen($needle) ===
292			strlen($haystack);
293			}
294
295			protected function convertBodyToString(StreamInterface $bodyStream, $readMaximumBytes = 1024 * 1024 * 2): string
296			{
297			$bodyStream->rewind();
298
299			$body = $bodyStream->read($readMaximumBytes);
300
301			return $body;
302			}
303
304			/**
305			* @param ResponseInterface\|null $response
306			* @param CrawlUrl $crawlUrl
307			*/
308			protected function handleCrawled(ResponseInterface $response, CrawlUrl $crawlUrl)
309			{
310			foreach ($this->crawlObservers as $crawlObserver) {
311			$crawlObserver->crawled(
312			$crawlUrl->url,
313			$response,
314			$crawlUrl->foundOnUrl
315			);
316			}
317			}
318
319			/**
320			* @param RequestException $exception
321			* @param CrawlUrl $crawlUrl
322			*/
323			protected function handleCrawlFailed(RequestException $exception, CrawlUrl $crawlUrl)
324			{
325			foreach ($this->crawlObservers as $crawlObserver) {
326			$crawlObserver->crawlFailed(
327			$crawlUrl->url,
328			$exception,
329			$crawlUrl->foundOnUrl
330			);
331			}
332			}
333
334			protected function getCrawlRequests(): Generator
335			{
336			while ($crawlUrl = $this->crawlQueue->getFirstPendingUrl()) {
337			if (! $this->crawlProfile->shouldCrawl($crawlUrl->url)) {
338			$this->crawlQueue->markAsProcessed($crawlUrl);
339			continue;
340			}
341
342			if ($this->crawlQueue->hasAlreadyBeenProcessed($crawlUrl)) {
343			continue;
344			}
345
346			foreach ($this->crawlObservers as $crawlObserver) {
347			$crawlObserver->willCrawl($crawlUrl->url);
348			}
349
350			$this->crawlQueue->markAsProcessed($crawlUrl);
351
352			yield $crawlUrl->getId() => new Request('GET', $crawlUrl->url);
353			}
354			}
355
356			protected function addAllLinksToCrawlQueue(string $html, UriInterface $foundOnUrl)
357			{
358			$allLinks = $this->extractAllLinks($html, $foundOnUrl);
359
360			collect($allLinks)
361			->filter(function (UriInterface $url) {
362			return $this->hasCrawlableScheme($url);
363			})
364			->map(function (UriInterface $url) {
365			return $this->normalizeUrl($url);
366			})
367			->filter(function (UriInterface $url) {
368			return $this->crawlProfile->shouldCrawl($url);
369			})
370			->reject(function (UriInterface $url) {
371			return $this->crawlQueue->has($url);
372			})
373			->each(function (UriInterface $url) use ($foundOnUrl) {
374			$node = $this->addtoDepthTree($this->depthTree, $url, $foundOnUrl);
375
376			if (strpos($url->getPath(), '/tel:') === 0) {
377			return;
378			}
379
380			if (! $this->shouldCrawl($node)) {
381			return;
382			}
383
384			if ($this->maximumCrawlCountReached()) {
385			return;
386			}
387
388			$crawlUrl = CrawlUrl::create($url, $foundOnUrl);
389
390			$this->addToCrawlQueue($crawlUrl);
391			});
392			}
393
394			protected function shouldCrawl(Node $node): bool
395			{
396			if (is_null($this->maximumDepth)) {
397			return true;
398			}
399
400			return $node->getDepth() <= $this->maximumDepth;
401			}
402
403			protected function extractAllLinks(string $html, UriInterface $foundOnUrl): Collection
404			{
405			if ($this->executeJavaScript) {
406			$html = $this->getBodyAfterExecutingJavaScript($foundOnUrl);
407			}
408
409			$domCrawler = new DomCrawler($html, $foundOnUrl);
410
411			return collect($domCrawler->filterXpath('//a')->links())
412			->map(function (Link $link) {
413			try {
414			return new Uri($link->getUri());
415			} catch (InvalidArgumentException $exception) {
416			return;
417			}
418			})
419			->filter();
420			}
421
422			protected function normalizeUrl(UriInterface $url): UriInterface
423			{
424			return $url->withFragment('');
425			}
426
427			protected function hasCrawlableScheme(UriInterface $uri): bool
428			{
429			return in_array($uri->getScheme(), ['http', 'https']);
430			}
431
432			protected function addtoDepthTree(Node $node, UriInterface $url, UriInterface $parentUrl)
433			{
434			$returnNode = null;
435
436			if ($node->getValue() === (string) $parentUrl) {
437			$newNode = new Node((string) $url);
438
439			$node->addChild($newNode);
440
441			return $newNode;
442			}
443
444			foreach ($node->getChildren() as $currentNode) {
445			$returnNode = $this->addToDepthTree($currentNode, $url, $parentUrl);
446
447			if (! is_null($returnNode)) {
448			break;
449			}
450			}
451
452			return $returnNode;
453			}
454
455			protected function getBodyAfterExecutingJavaScript(UriInterface $foundOnUrl): string
456			{
457			$browsershot = $this->getBrowsershot();
458
459			$html = $browsershot->setUrl((string) $foundOnUrl)->bodyHtml();
460
461			return html_entity_decode($html);
462			}
463
464			protected function getBrowsershot(): Browsershot
465			{
466			if ($this->browsershot) {
467			return $this->browsershot;
468			}
469
470			$this->browsershot = new Browsershot();
471
472			return $this->browsershot;
473			}
474
475			public function setBrowsershot(Browsershot $browsershot)
476			{
477			$this->browsershot = $browsershot;
478
479			return $this;
480			}
481
482			protected function addToCrawlQueue(CrawlUrl $crawlUrl)
483			{
484			$this->crawledUrlCount++;
485
486			$this->crawlQueue->add($crawlUrl);
487
488			return $this;
489			}
490
491			protected function maximumCrawlCountReached(): bool
492			{
493			if (is_null($this->maximumCrawlCount)) {
494			return false;
495			}
496
497			return $this->crawledUrlCount >= $this->maximumCrawlCount;
498			}
499			}
500

spatie / crawler

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Crawler::handleResponse() A

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