/**
* Guesses the best matching adapter.
*
* @param string|array $preferred The preferred adapters.
*
* @throws \Ivory\HttpAdapter\HttpAdapterException If no adapters can be guessed.
*
* @return \Ivory\HttpAdapter\HttpAdapterInterface The guessed adapter.
*/
public static function guess($preferred = array())
{
$adapters = self::$adapters;
foreach ((array) $preferred as $preference) {
if (self::capable($preference)) {
return self::create($preference);
}
unset($adapters[$preference]);
}
foreach (array_keys($adapters) as $name) {
if (self::capable($name)) {
return self::create($name);
}
}
throw HttpAdapterException::httpAdaptersAreNotUsable();
}
/**
* Fetches a response from an URL.
*
* @param string $url The url to fetch.
* @param array $headers The http headers.
* @param callable $callable A callable function executed before fetching the url.
*
* @return \Widop\HttpAdapter\HttpResponse The response.
*/
private function execute($url, array $headers = array(), $callable = null)
{
$curl = curl_init();
curl_setopt($curl, CURLOPT_URL, $this->fixUrl($url));
curl_setopt($curl, CURLOPT_HEADER, true);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
if ($this->getMaxRedirects() > 0) {
curl_setopt($curl, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($curl, CURLOPT_MAXREDIRS, $this->getMaxRedirects());
}
if (!empty($headers)) {
curl_setopt($curl, CURLOPT_HTTPHEADER, $this->fixHeaders($headers));
}
if ($callable !== null) {
call_user_func($callable, $curl);
}
if (($response = curl_exec($curl)) === false) {
$error = curl_error($curl);
curl_close($curl);
throw HttpAdapterException::cannotFetchUrl($url, $this->getName(), $error);
}
$statusCode = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$headersSize = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
$effectiveUrl = curl_getinfo($curl, CURLINFO_EFFECTIVE_URL);
curl_close($curl);
$headers = substr($response, 0, $headersSize);
$body = substr($response, $headersSize);
return $this->createResponse($statusCode, $url, $headers, $body, $effectiveUrl);
}
