<?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\RuntimeException;
use JsonSchema\Validator;
/**
* Tries to retrieve JSON schemas from a URI using cURL library
*
* @author Sander Coolen <sander@jibber.nl>
*/
class Curl extends AbstractRetriever
{
protected $messageBody;
public function __construct()
{
if (!function_exists('curl_init')) {
// Cannot test this, because curl_init is present on all test platforms plus mock
throw new RuntimeException('cURL not installed'); // @codeCoverageIgnore
}
}
/**
* {@inheritdoc}
*
* @see \JsonSchema\Uri\Retrievers\UriRetrieverInterface::retrieve()
*/
public function retrieve($uri)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $uri);
curl_setopt($ch, CURLOPT_HEADER, true);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_HTTPHEADER, array('Accept: ' . Validator::SCHEMA_MEDIA_TYPE));
$response = curl_exec($ch);
if (false === $response) {
throw new \JsonSchema\Exception\ResourceNotFoundException('JSON schema not found');
}
$this->fetchMessageBody($response);
$this->fetchContentType($response);
curl_close($ch);
return $this->messageBody;
}
/**
* @param string $response cURL HTTP response
*/
private function fetchMessageBody($response)
{
preg_match("/(?:\r\n){2}(.*)$/ms", $response, $match);
$this->messageBody = $match[1];
}
/**
* @param string $response cURL HTTP response
*
* @return bool Whether the Content-Type header was found or not
*/
protected function fetchContentType($response)
{
if (0 < preg_match("/Content-Type:(\V*)/ims", $response, $match)) {
$this->contentType = trim($match[1]);
return true;
}
return false;
}
}