%PDF-
%PDF-
Mini Shell
Mini Shell
<?php
namespace React\Http\Io;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
use Psr\Http\Message\UriInterface;
use RingCentral\Psr7\Request;
use RingCentral\Psr7\Uri;
use React\EventLoop\LoopInterface;
use React\Http\Message\ResponseException;
use React\Promise\Deferred;
use React\Promise\PromiseInterface;
use React\Stream\ReadableStreamInterface;
/**
* @internal
*/
class Transaction
{
private $sender;
private $loop;
// context: http.timeout (ini_get('default_socket_timeout'): 60)
private $timeout;
// context: http.follow_location (true)
private $followRedirects = true;
// context: http.max_redirects (10)
private $maxRedirects = 10;
// context: http.ignore_errors (false)
private $obeySuccessCode = true;
private $streaming = false;
private $maximumSize = 16777216; // 16 MiB = 2^24 bytes
public function __construct(Sender $sender, LoopInterface $loop)
{
$this->sender = $sender;
$this->loop = $loop;
}
/**
* @param array $options
* @return self returns new instance, without modifying existing instance
*/
public function withOptions(array $options)
{
$transaction = clone $this;
foreach ($options as $name => $value) {
if (property_exists($transaction, $name)) {
// restore default value if null is given
if ($value === null) {
$default = new self($this->sender, $this->loop);
$value = $default->$name;
}
$transaction->$name = $value;
}
}
return $transaction;
}
public function send(RequestInterface $request)
{
$deferred = new Deferred(function () use (&$deferred) {
if (isset($deferred->pending)) {
$deferred->pending->cancel();
unset($deferred->pending);
}
});
$deferred->numRequests = 0;
// use timeout from options or default to PHP's default_socket_timeout (60)
$timeout = (float)($this->timeout !== null ? $this->timeout : ini_get("default_socket_timeout"));
$loop = $this->loop;
$this->next($request, $deferred)->then(
function (ResponseInterface $response) use ($deferred, $loop, &$timeout) {
if (isset($deferred->timeout)) {
$loop->cancelTimer($deferred->timeout);
unset($deferred->timeout);
}
$timeout = -1;
$deferred->resolve($response);
},
function ($e) use ($deferred, $loop, &$timeout) {
if (isset($deferred->timeout)) {
$loop->cancelTimer($deferred->timeout);
unset($deferred->timeout);
}
$timeout = -1;
$deferred->reject($e);
}
);
if ($timeout < 0) {
return $deferred->promise();
}
$body = $request->getBody();
if ($body instanceof ReadableStreamInterface && $body->isReadable()) {
$that = $this;
$body->on('close', function () use ($that, $deferred, &$timeout) {
if ($timeout >= 0) {
$that->applyTimeout($deferred, $timeout);
}
});
} else {
$this->applyTimeout($deferred, $timeout);
}
return $deferred->promise();
}
/**
* @internal
* @param Deferred $deferred
* @param number $timeout
* @return void
*/
public function applyTimeout(Deferred $deferred, $timeout)
{
$deferred->timeout = $this->loop->addTimer($timeout, function () use ($timeout, $deferred) {
$deferred->reject(new \RuntimeException(
'Request timed out after ' . $timeout . ' seconds'
));
if (isset($deferred->pending)) {
$deferred->pending->cancel();
unset($deferred->pending);
}
});
}
private function next(RequestInterface $request, Deferred $deferred)
{
$this->progress('request', array($request));
$that = $this;
++$deferred->numRequests;
$promise = $this->sender->send($request);
if (!$this->streaming) {
$promise = $promise->then(function ($response) use ($deferred, $that) {
return $that->bufferResponse($response, $deferred);
});
}
$deferred->pending = $promise;
return $promise->then(
function (ResponseInterface $response) use ($request, $that, $deferred) {
return $that->onResponse($response, $request, $deferred);
}
);
}
/**
* @internal
* @param ResponseInterface $response
* @return PromiseInterface Promise<ResponseInterface, Exception>
*/
public function bufferResponse(ResponseInterface $response, $deferred)
{
$stream = $response->getBody();
$size = $stream->getSize();
if ($size !== null && $size > $this->maximumSize) {
$stream->close();
return \React\Promise\reject(new \OverflowException(
'Response body size of ' . $size . ' bytes exceeds maximum of ' . $this->maximumSize . ' bytes',
\defined('SOCKET_EMSGSIZE') ? \SOCKET_EMSGSIZE : 0
));
}
// body is not streaming => already buffered
if (!$stream instanceof ReadableStreamInterface) {
return \React\Promise\resolve($response);
}
// buffer stream and resolve with buffered body
$maximumSize = $this->maximumSize;
$promise = \React\Promise\Stream\buffer($stream, $maximumSize)->then(
function ($body) use ($response) {
return $response->withBody(\RingCentral\Psr7\stream_for($body));
},
function ($e) use ($stream, $maximumSize) {
// try to close stream if buffering fails (or is cancelled)
$stream->close();
if ($e instanceof \OverflowException) {
$e = new \OverflowException(
'Response body size exceeds maximum of ' . $maximumSize . ' bytes',
\defined('SOCKET_EMSGSIZE') ? \SOCKET_EMSGSIZE : 0
);
}
throw $e;
}
);
$deferred->pending = $promise;
return $promise;
}
/**
* @internal
* @param ResponseInterface $response
* @param RequestInterface $request
* @throws ResponseException
* @return ResponseInterface|PromiseInterface
*/
public function onResponse(ResponseInterface $response, RequestInterface $request, $deferred)
{
$this->progress('response', array($response, $request));
// follow 3xx (Redirection) response status codes if Location header is present and not explicitly disabled
// @link https://tools.ietf.org/html/rfc7231#section-6.4
if ($this->followRedirects && ($response->getStatusCode() >= 300 && $response->getStatusCode() < 400) && $response->hasHeader('Location')) {
return $this->onResponseRedirect($response, $request, $deferred);
}
// only status codes 200-399 are considered to be valid, reject otherwise
if ($this->obeySuccessCode && ($response->getStatusCode() < 200 || $response->getStatusCode() >= 400)) {
throw new ResponseException($response);
}
// resolve our initial promise
return $response;
}
/**
* @param ResponseInterface $response
* @param RequestInterface $request
* @return PromiseInterface
* @throws \RuntimeException
*/
private function onResponseRedirect(ResponseInterface $response, RequestInterface $request, Deferred $deferred)
{
// resolve location relative to last request URI
$location = Uri::resolve($request->getUri(), $response->getHeaderLine('Location'));
$request = $this->makeRedirectRequest($request, $location);
$this->progress('redirect', array($request));
if ($deferred->numRequests >= $this->maxRedirects) {
throw new \RuntimeException('Maximum number of redirects (' . $this->maxRedirects . ') exceeded');
}
return $this->next($request, $deferred);
}
/**
* @param RequestInterface $request
* @param UriInterface $location
* @return RequestInterface
*/
private function makeRedirectRequest(RequestInterface $request, UriInterface $location)
{
$originalHost = $request->getUri()->getHost();
$request = $request
->withoutHeader('Host')
->withoutHeader('Content-Type')
->withoutHeader('Content-Length');
// Remove authorization if changing hostnames (but not if just changing ports or protocols).
if ($location->getHost() !== $originalHost) {
$request = $request->withoutHeader('Authorization');
}
// naïve approach..
$method = ($request->getMethod() === 'HEAD') ? 'HEAD' : 'GET';
return new Request($method, $location, $request->getHeaders());
}
private function progress($name, array $args = array())
{
return;
echo $name;
foreach ($args as $arg) {
echo ' ';
if ($arg instanceof ResponseInterface) {
echo 'HTTP/' . $arg->getProtocolVersion() . ' ' . $arg->getStatusCode() . ' ' . $arg->getReasonPhrase();
} elseif ($arg instanceof RequestInterface) {
echo $arg->getMethod() . ' ' . $arg->getRequestTarget() . ' HTTP/' . $arg->getProtocolVersion();
} else {
echo $arg;
}
}
echo PHP_EOL;
}
}
Zerion Mini Shell 1.0