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<?php declare(strict_types=1); |
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/** |
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* @license http://opensource.org/licenses/mit-license.php MIT |
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* @link https://github.com/nicoSWD |
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* @author Nicolas Oelgart <[email protected]> |
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*/ |
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namespace nicoSWD\SecHeaderCheck\Domain\Header; |
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use nicoSWD\SecHeaderCheck\Domain\Header\Exception\TooManyRedirectsException; |
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use nicoSWD\SecHeaderCheck\Domain\URL\URL; |
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abstract class AbstractHeaderProvider implements HeaderProviderInterface |
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{ |
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/** @var int */ |
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private $maxRedirects; |
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/** @var int */ |
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protected $connectionTimeout; |
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public function __construct(int $maxRedirects, int $connectionTimeout) |
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{ |
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$this->maxRedirects = $maxRedirects; |
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$this->connectionTimeout = $connectionTimeout; |
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} |
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abstract public function getRawHeaders(URL $url): string; |
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public function getHeadersFromUrl(URL $url, bool $followRedirects = true): HttpHeaderBag |
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{ |
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$headers = $this->getHeadersFromString($this->getRawHeaders($url)); |
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if ($followRedirects) { |
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$headers = $this->getRawHeadersFromRedirectingUrl($url, $headers); |
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} |
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return $headers; |
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} |
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public function getHeadersFromString(string $headers): HttpHeaderBag |
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{ |
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$headersLines = preg_split('~\r?\n~', $headers, -1, PREG_SPLIT_NO_EMPTY); |
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$parsedHeaders = []; |
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$firstLine = array_shift($headersLines); |
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[$headerName, $headerValue] = explode(' ', $firstLine, 2); |
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$parsedHeaders[$headerName][] = $headerValue; |
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foreach ($headersLines as $line) { |
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[$headerName, $headerValue] = $this->getNameAndValue($line); |
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$parsedHeaders[$headerName][] = $headerValue; |
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} |
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return $this->headerArrayToBag($parsedHeaders); |
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} |
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private function headerArrayToBag(array $headers): HttpHeaderBag |
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{ |
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$headerBag = new HttpHeaderBag(); |
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foreach ($headers as $headerName => $values) { |
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foreach ($values as $value) { |
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$headerBag->add($this->createHeader($headerName, $value)); |
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} |
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} |
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return $headerBag; |
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} |
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private function getRawHeadersFromRedirectingUrl(URL $url, HttpHeaderBag $headers): HttpHeaderBag |
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{ |
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$numRedirects = 0; |
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while ($headers->has('location')) { |
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if (++$numRedirects > $this->maxRedirects) { |
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throw new TooManyRedirectsException(); |
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} |
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$headers = $this->getHeadersFromString( |
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$this->getRawHeaders($url->redirectTo($headers->getFirst('location'))) |
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); |
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} |
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return $headers; |
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} |
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protected function getNameAndValue(string $line): array |
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{ |
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$parts = explode(':', $line, 2); |
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$headerName = trim(strtolower($parts[0])); |
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$headerValue = trim($parts[1] ?? ''); |
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return [$headerName, $headerValue]; |
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} |
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private function createHeader(string $headerName, string $value): HttpHeader |
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{ |
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return new HttpHeader(strtolower(trim($headerName)), $value); |
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} |
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} |
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nicoSWD /
headsec
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