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<?php
namespace Guzzle\Http\Curl;
use Guzzle\Http\Message\RequestInterface;
use Guzzle\Http\EntityBody;
use Guzzle\Http\Message\Response;
/**
* Mediator between curl handles and request objects
*/
class RequestMediator
{
/** @var RequestInterface */
protected $request;
/** @var bool Whether or not to emit read/write events */
protected $emitIo;
/**
* @param RequestInterface $request Request to mediate
* @param bool $emitIo Set to true to dispatch events on input and output
*/
public function __construct(RequestInterface $request, $emitIo = false)
{
$this->request = $request;
$this->emitIo = $emitIo;
}
/**
* Receive a response header from curl
*
* @param resource $curl Curl handle
* @param string $header Received header
*
* @return int
*/
public function receiveResponseHeader($curl, $header)
{
static $normalize = array("\r", "\n");
$length = strlen($header);
$header = str_replace($normalize, '', $header);
if (strpos($header, 'HTTP/') === 0) {
$startLine = explode(' ', $header, 3);
list($protocol, $version) = explode('/', trim($startLine[0]));
$code = $startLine[1];
$status = isset($startLine[2]) ? $startLine[2] : '';
// Only download the body of the response to the specified response
// body when a successful response is received.
if ($code >= 200 && $code < 300) {
$body = $this->request->getResponseBody();
} else {
$body = EntityBody::factory();
}
$response = new Response($code, null, $body);
$response->setProtocol($protocol, $version);
$response->setStatus($code, $status);
$this->request->startResponse($response);
$this->request->dispatch('request.receive.status_line', array(
'request' => $this,
'line' => $header,
'status_code' => $code,
'reason_phrase' => $status
));
} elseif ($pos = strpos($header, ':')) {
$this->request->getResponse()->addHeader(
trim(substr($header, 0, $pos)),
trim(substr($header, $pos + 1))
);
}
return $length;
}
/**
* Received a progress notification
*
* @param int $downloadSize Total download size
* @param int $downloaded Amount of bytes downloaded
* @param int $uploadSize Total upload size
* @param int $uploaded Amount of bytes uploaded
* @param resource $handle CurlHandle object
*/
public function progress($downloadSize, $downloaded, $uploadSize, $uploaded, $handle = null)
{
$this->request->dispatch('curl.callback.progress', array(
'request' => $this->request,
'handle' => $handle,
'download_size' => $downloadSize,
'downloaded' => $downloaded,
'upload_size' => $uploadSize,
'uploaded' => $uploaded
));
}
/**
* Write data to the response body of a request
*
* @param resource $curl Curl handle
* @param string $write Data that was received
*
* @return int
*/
public function writeResponseBody($curl, $write)
{
if ($this->emitIo) {
$this->request->dispatch('curl.callback.write', array(
'request' => $this->request,
'write' => $write
));
}
if ($response = $this->request->getResponse()) {
return $response->getBody()->write($write);
} else {
// Unexpected data received before response headers - abort transfer
return 0;
}
}
/**
* Read data from the request body and send it to curl
*
* @param resource $ch Curl handle
* @param resource $fd File descriptor
* @param int $length Amount of data to read
*
* @return string
*/
public function readRequestBody($ch, $fd, $length)
{
if (!($body = $this->request->getBody())) {
return '';
}
$read = (string) $body->read($length);
if ($this->emitIo) {
$this->request->dispatch('curl.callback.read', array('request' => $this->request, 'read' => $read));
}
return $read;
}
}