<?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;
/**
* 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)
{
$errorMessage = null;
set_error_handler(function ($errno, $errstr) use (&$errorMessage) {
$errorMessage = $errstr;
});
$response = file_get_contents($uri);
restore_error_handler();
if ($errorMessage) {
throw new ResourceNotFoundException($errorMessage);
}
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)) {
// $http_response_header cannot be tested, because it's defined in the method's local scope
// See http://php.net/manual/en/reserved.variables.httpresponseheader.php for more info.
$this->fetchContentType($http_response_header); // @codeCoverageIgnore
} else { // @codeCoverageIgnore
// 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 bool 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]);
}
return null;
}
}