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|
<?php
namespace React\Http\Client;
use Evenement\EventEmitter;
use React\Promise;
use React\Socket\ConnectionInterface;
use React\Socket\ConnectorInterface;
use React\Stream\WritableStreamInterface;
use RingCentral\Psr7 as gPsr;
/**
* @event response
* @event drain
* @event error
* @event end
* @internal
*/
class Request extends EventEmitter implements WritableStreamInterface
{
const STATE_INIT = 0;
const STATE_WRITING_HEAD = 1;
const STATE_HEAD_WRITTEN = 2;
const STATE_END = 3;
private $connector;
private $requestData;
private $stream;
private $buffer;
private $responseFactory;
private $state = self::STATE_INIT;
private $ended = false;
private $pendingWrites = '';
public function __construct(ConnectorInterface $connector, RequestData $requestData)
{
$this->connector = $connector;
$this->requestData = $requestData;
}
public function isWritable()
{
return self::STATE_END > $this->state && !$this->ended;
}
private function writeHead()
{
$this->state = self::STATE_WRITING_HEAD;
$requestData = $this->requestData;
$streamRef = &$this->stream;
$stateRef = &$this->state;
$pendingWrites = &$this->pendingWrites;
$that = $this;
$promise = $this->connect();
$promise->then(
function (ConnectionInterface $stream) use ($requestData, &$streamRef, &$stateRef, &$pendingWrites, $that) {
$streamRef = $stream;
$stream->on('drain', array($that, 'handleDrain'));
$stream->on('data', array($that, 'handleData'));
$stream->on('end', array($that, 'handleEnd'));
$stream->on('error', array($that, 'handleError'));
$stream->on('close', array($that, 'handleClose'));
$headers = (string) $requestData;
$more = $stream->write($headers . $pendingWrites);
$stateRef = Request::STATE_HEAD_WRITTEN;
// clear pending writes if non-empty
if ($pendingWrites !== '') {
$pendingWrites = '';
if ($more) {
$that->emit('drain');
}
}
},
array($this, 'closeError')
);
$this->on('close', function() use ($promise) {
$promise->cancel();
});
}
public function write($data)
{
if (!$this->isWritable()) {
return false;
}
// write directly to connection stream if already available
if (self::STATE_HEAD_WRITTEN <= $this->state) {
return $this->stream->write($data);
}
// otherwise buffer and try to establish connection
$this->pendingWrites .= $data;
if (self::STATE_WRITING_HEAD > $this->state) {
$this->writeHead();
}
return false;
}
public function end($data = null)
{
if (!$this->isWritable()) {
return;
}
if (null !== $data) {
$this->write($data);
} else if (self::STATE_WRITING_HEAD > $this->state) {
$this->writeHead();
}
$this->ended = true;
}
/** @internal */
public function handleDrain()
{
$this->emit('drain');
}
/** @internal */
public function handleData($data)
{
$this->buffer .= $data;
// buffer until double CRLF (or double LF for compatibility with legacy servers)
if (false !== strpos($this->buffer, "\r\n\r\n") || false !== strpos($this->buffer, "\n\n")) {
try {
$response = gPsr\parse_response($this->buffer);
$bodyChunk = (string) $response->getBody();
} catch (\InvalidArgumentException $exception) {
$this->emit('error', array($exception));
}
$this->buffer = null;
$this->stream->removeListener('drain', array($this, 'handleDrain'));
$this->stream->removeListener('data', array($this, 'handleData'));
$this->stream->removeListener('end', array($this, 'handleEnd'));
$this->stream->removeListener('error', array($this, 'handleError'));
$this->stream->removeListener('close', array($this, 'handleClose'));
if (!isset($response)) {
return;
}
$this->stream->on('close', array($this, 'handleClose'));
$this->emit('response', array($response, $this->stream));
$this->stream->emit('data', array($bodyChunk));
}
}
/** @internal */
public function handleEnd()
{
$this->closeError(new \RuntimeException(
"Connection ended before receiving response"
));
}
/** @internal */
public function handleError(\Exception $error)
{
$this->closeError(new \RuntimeException(
"An error occurred in the underlying stream",
0,
$error
));
}
/** @internal */
public function handleClose()
{
$this->close();
}
/** @internal */
public function closeError(\Exception $error)
{
if (self::STATE_END <= $this->state) {
return;
}
$this->emit('error', array($error));
$this->close();
}
public function close()
{
if (self::STATE_END <= $this->state) {
return;
}
$this->state = self::STATE_END;
$this->pendingWrites = '';
if ($this->stream) {
$this->stream->close();
}
$this->emit('close');
$this->removeAllListeners();
}
protected function connect()
{
$scheme = $this->requestData->getScheme();
if ($scheme !== 'https' && $scheme !== 'http') {
return Promise\reject(
new \InvalidArgumentException('Invalid request URL given')
);
}
$host = $this->requestData->getHost();
$port = $this->requestData->getPort();
if ($scheme === 'https') {
$host = 'tls://' . $host;
}
return $this->connector
->connect($host . ':' . $port);
}
}
|
