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<?php |
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namespace PiedWeb\UrlHarvester; |
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use PiedWeb\Curl\Request as CurlRequest; |
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use PiedWeb\Curl\Response; |
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/** |
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* Request a page and get it only if it's an html page. |
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*/ |
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class Request |
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{ |
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/** |
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* @var string |
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*/ |
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private $url; |
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/** |
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* @var string |
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*/ |
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private $userAgent; |
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/** |
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* @var string |
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*/ |
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private $language; |
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/** |
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* @var string |
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*/ |
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private $proxy; |
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/** |
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* @var bool |
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*/ |
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private $tryHttps; |
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/** |
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* @var string |
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*/ |
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private $downloadOnly; |
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/** |
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* @var CurlRequest |
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*/ |
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private $request; |
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/** |
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* @var Response |
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*/ |
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private $response; |
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/** |
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* @param string $url |
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* @param string $userAgent |
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* @param string $language |
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* @param bool $tryHttps |
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* |
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* @return self |
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*/ |
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public static function make( |
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string $url, |
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string $userAgent, |
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$downloadOnly = '200;html', |
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string $language = 'en,en-US;q=0.5', |
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bool $tryHttps = false, |
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?string $proxy = null |
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) { |
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$request = new Request($url); |
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$request->tryHttps = $tryHttps; |
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$request->userAgent = $userAgent; |
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$request->downloadOnly = $downloadOnly; |
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$request->language = $language; |
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$request->proxy = $proxy; |
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$request->request(); |
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return $request; |
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} |
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private function __construct($url) |
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{ |
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/* |
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if (!filter_var($string, FILTER_VALIDATE_URL)) { |
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throw new \Exception('URL invalid: '.$string); |
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}**/ |
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$this->url = $url; |
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} |
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/** |
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* Prepare headers as a normal browser (same order, same content). |
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* |
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* @return array |
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*/ |
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private function prepareHeadersForRequest() |
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{ |
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$host = parse_url($this->url, PHP_URL_HOST); |
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$headers = []; |
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$headers[] = 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8'; |
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$headers[] = 'Accept-Encoding: gzip, deflate'; |
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$headers[] = 'Accept-Language: '.$this->language; |
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$headers[] = 'Connection: keep-alive'; |
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if ($host) { |
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//$headers[] = 'Host: '.$host; |
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} |
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// Referer |
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$headers[] = 'Upgrade-Insecure-Requests: 1'; |
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$headers[] = 'User-Agent: '.$this->userAgent; |
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return $headers; |
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} |
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/** |
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* @return self |
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*/ |
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private function request() |
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{ |
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$this->request = new CurlRequest($this->url); |
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$this->request |
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->setReturnHeader() |
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->setEncodingGzip() |
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->setUserAgent($this->userAgent) |
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->setDefaultSpeedOptions() |
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->setOpt(CURLOPT_SSL_VERIFYHOST, 0) |
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->setOpt(CURLOPT_SSL_VERIFYPEER, 0) |
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->setOpt(CURLOPT_MAXREDIRS, 1) |
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->setOpt(CURLOPT_COOKIE, false) |
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->setOpt(CURLOPT_CONNECTTIMEOUT, 20) |
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->setOpt(CURLOPT_TIMEOUT, 80); |
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$this->setDownloadOnly(); |
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if ($this->proxy) { |
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$this->request->setProxy($this->proxy); |
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} |
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$this->request->setOpt(CURLOPT_HTTPHEADER, $this->prepareHeadersForRequest()); |
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$this->response = $this->request->exec(); |
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// Recrawl https version if it's asked |
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if (true === $this->tryHttps && false !== ($httpsUrl = $this->amIRedirectToHttps())) { |
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$requestForHttps = self::make($httpsUrl, $this->userAgent, $this->downloadOnly, $this->language); |
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if (!$requestForHttps->get()->hasError()) { // if no error, $this becode https request |
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return $requestForHttps; |
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} |
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} |
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return $this; |
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} |
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protected function setDownloadOnly() |
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{ |
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if ($this->downloadOnly) { |
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if ('200;html' == $this->downloadOnly) { |
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$download = new \PiedWeb\Curl\MultipleCheckInHeaders(); |
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$this->request->setDownloadOnlyIf([$download, 'check']); |
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} elseif (is_callable($this->downloadOnly)) { |
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$this->request->setDownloadOnlyIf($this->downloadOnly); |
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} |
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} |
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} |
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/** |
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* @return CurlRequest |
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*/ |
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public function get() |
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{ |
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return $this->request; |
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} |
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/** |
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* @return Response|int corresponding to the curl error |
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*/ |
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public function getResponse() |
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{ |
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return $this->response; |
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} |
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/** |
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* @return string|false |
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*/ |
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private function amIRedirectToHttps() |
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{ |
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$headers = $this->response->getHeaders(); |
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$headers = array_change_key_case(null !== $headers ? $headers : []); |
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$redirUrl = isset($headers['location']) ? $headers['location'] : null; |
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if (null !== $redirUrl && ($httpsUrl = preg_replace('#^http://#', 'https://', $this->url, 1)) == $redirUrl) { |
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return $httpsUrl; |
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} |
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return false; |
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} |
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} |
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PiedWeb /
UrlHarvester
