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<?php
namespace GuzzleHttp;
use GuzzleHttp\Message\MessageFactoryInterface;
use GuzzleHttp\Message\RequestInterface;
use GuzzleHttp\Event\ProgressEvent;
use GuzzleHttp\Message\Request;
use GuzzleHttp\Ring\Core;
use GuzzleHttp\Stream\Stream;
use GuzzleHttp\Exception\RequestException;
/**
* Provides the bridge between Guzzle requests and responses and Guzzle Ring.
*/
class RingBridge
{
/**
* Creates a Ring request from a request object.
*
* This function does not hook up the "then" and "progress" events that
* would be required for actually sending a Guzzle request through a
* RingPHP handler.
*
* @param RequestInterface $request Request to convert.
*
* @return array Converted Guzzle Ring request.
*/
public static function createRingRequest(RequestInterface $request)
{
$options = $request->getConfig()->toArray();
$url = $request->getUrl();
// No need to calculate the query string twice (in URL and query).
$qs = ($pos = strpos($url, '?')) ? substr($url, $pos + 1) : null;
return [
'scheme' => $request->getScheme(),
'http_method' => $request->getMethod(),
'url' => $url,
'uri' => $request->getPath(),
'headers' => $request->getHeaders(),
'body' => $request->getBody(),
'version' => $request->getProtocolVersion(),
'client' => $options,
'query_string' => $qs,
'future' => isset($options['future']) ? $options['future'] : false
];
}
/**
* Creates a Ring request from a request object AND prepares the callbacks.
*
* @param Transaction $trans Transaction to update.
*
* @return array Converted Guzzle Ring request.
*/
public static function prepareRingRequest(Transaction $trans)
{
// Clear out the transaction state when initiating.
$trans->exception = null;
$request = self::createRingRequest($trans->request);
// Emit progress events if any progress listeners are registered.
if ($trans->request->getEmitter()->hasListeners('progress')) {
$emitter = $trans->request->getEmitter();
$request['client']['progress'] = function ($a, $b, $c, $d) use ($trans, $emitter) {
$emitter->emit('progress', new ProgressEvent($trans, $a, $b, $c, $d));
};
}
return $request;
}
/**
* Handles the process of processing a response received from a ring
* handler. The created response is added to the transaction, and the
* transaction stat is set appropriately.
*
* @param Transaction $trans Owns request and response.
* @param array $response Ring response array
* @param MessageFactoryInterface $messageFactory Creates response objects.
*/
public static function completeRingResponse(
Transaction $trans,
array $response,
MessageFactoryInterface $messageFactory
) {
$trans->state = 'complete';
$trans->transferInfo = isset($response['transfer_stats'])
? $response['transfer_stats'] : [];
if (!empty($response['status'])) {
$options = [];
if (isset($response['version'])) {
$options['protocol_version'] = $response['version'];
}
if (isset($response['reason'])) {
$options['reason_phrase'] = $response['reason'];
}
$trans->response = $messageFactory->createResponse(
$response['status'],
isset($response['headers']) ? $response['headers'] : [],
isset($response['body']) ? $response['body'] : null,
$options
);
if (isset($response['effective_url'])) {
$trans->response->setEffectiveUrl($response['effective_url']);
}
} elseif (empty($response['error'])) {
// When nothing was returned, then we need to add an error.
$response['error'] = self::getNoRingResponseException($trans->request);
}
if (isset($response['error'])) {
$trans->state = 'error';
$trans->exception = $response['error'];
}
}
/**
* Creates a Guzzle request object using a ring request array.
*
* @param array $request Ring request
*
* @return Request
* @throws \InvalidArgumentException for incomplete requests.
*/
public static function fromRingRequest(array $request)
{
$options = [];
if (isset($request['version'])) {
$options['protocol_version'] = $request['version'];
}
if (!isset($request['http_method'])) {
throw new \InvalidArgumentException('No http_method');
}
return new Request(
$request['http_method'],
Core::url($request),
isset($request['headers']) ? $request['headers'] : [],
isset($request['body']) ? Stream::factory($request['body']) : null,
$options
);
}
/**
* Get an exception that can be used when a RingPHP handler does not
* populate a response.
*
* @param RequestInterface $request
*
* @return RequestException
*/
public static function getNoRingResponseException(RequestInterface $request)
{
$message = <<<EOT
Sending the request did not return a response, exception, or populate the
transaction with a response. This is most likely due to an incorrectly
implemented RingPHP handler. If you are simply trying to mock responses,
then it is recommended to use the GuzzleHttp\Ring\Client\MockHandler.
EOT;
return new RequestException($message, $request);
}
}