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<?php
/*
* This file is part of the JsonSchema package.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace JsonSchema\Uri\Retrievers;
use JsonSchema\Exception\ResourceNotFoundException;
use JsonSchema\Validator;
/**
* Tries to retrieve JSON schemas from a URI using file_get_contents()
*
* @author Sander Coolen <sander@jibber.nl>
*/
class FileGetContents extends AbstractRetriever
{
protected $messageBody;
/**
* {@inheritDoc}
* @see \JsonSchema\Uri\Retrievers\UriRetrieverInterface::retrieve()
*/
public function retrieve($uri)
{
$context = stream_context_create(array(
'http' => array(
'method' => 'GET',
'header' => "Accept: " . Validator::SCHEMA_MEDIA_TYPE
)));
set_error_handler(function() use ($uri) {
throw new ResourceNotFoundException('JSON schema not found at ' . $uri);
});
$response = file_get_contents($uri);
restore_error_handler();
if (false === $response) {
throw new ResourceNotFoundException('JSON schema not found at ' . $uri);
}
if ($response == ''
&& substr($uri, 0, 7) == 'file://' && substr($uri, -1) == '/'
) {
throw new ResourceNotFoundException('JSON schema not found at ' . $uri);
}
$this->messageBody = $response;
if (! empty($http_response_header)) {
$this->fetchContentType($http_response_header);
} else {
// Could be a "file://" url or something else - fake up the response
$this->contentType = null;
}
return $this->messageBody;
}
/**
* @param array $headers HTTP Response Headers
* @return boolean Whether the Content-Type header was found or not
*/
private function fetchContentType(array $headers)
{
foreach ($headers as $header) {
if ($this->contentType = self::getContentTypeMatchInHeader($header)) {
return true;
}
}
return false;
}
/**
* @param string $header
* @return string|null
*/
protected static function getContentTypeMatchInHeader($header)
{
if (0 < preg_match("/Content-Type:(\V*)/ims", $header, $match)) {
return trim($match[1]);
}
}
}
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