<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\HttpClient\Response;
use Psr\Log\LoggerInterface;
use Symfony\Component\HttpClient\Chunk\DataChunk;
use Symfony\Component\HttpClient\Chunk\ErrorChunk;
use Symfony\Component\HttpClient\Chunk\FirstChunk;
use Symfony\Component\HttpClient\Chunk\LastChunk;
use Symfony\Component\HttpClient\Exception\TransportException;
use Symfony\Component\HttpClient\Internal\Canary;
use Symfony\Component\HttpClient\Internal\ClientState;
/**
* Implements common logic for transport-level response classes.
*
* @author Nicolas Grekas <p@tchwork.com>
*
* @internal
*/
trait TransportResponseTrait
{
private Canary $canary;
/** @var array<string, list<string>> */
private array $headers = [];
private array $info = [
'response_headers' => [],
'http_code' => 0,
'error' => null,
'canceled' => false,
];
/** @var object|resource|null */
private $handle;
private int|string $id;
private ?float $timeout = 0;
private \InflateContext|bool|null $inflate = null;
private ?array $finalInfo = null;
private ?LoggerInterface $logger = null;
public function getStatusCode(): int
{
if ($this->initializer) {
self::initialize($this);
}
return $this->info['http_code'];
}
public function getHeaders(bool $throw = true): array
{
if ($this->initializer) {
self::initialize($this);
}
if ($throw) {
$this->checkStatusCode();
}
return $this->headers;
}
public function cancel(): void
{
$this->info['canceled'] = true;
$this->info['error'] = 'Response has been canceled.';
$this->close();
}
/**
* Closes the response and all its network handles.
*/
protected function close(): void
{
$this->canary->cancel();
$this->inflate = null;
}
/**
* Adds pending responses to the activity list.
*/
abstract protected static function schedule(self $response, array &$runningResponses): void;
/**
* Performs all pending non-blocking operations.
*/
abstract protected static function perform(ClientState $multi, array $responses): void;
/**
* Waits for network activity.
*/
abstract protected static function select(ClientState $multi, float $timeout): int;
private static function addResponseHeaders(array $responseHeaders, array &$info, array &$headers, string &$debug = ''): void
{
foreach ($responseHeaders as $h) {
if (11 <= \strlen($h) && '/' === $h[4] && preg_match('#^HTTP/\d+(?:\.\d+)? (\d\d\d)(?: |$)#', $h, $m)) {
if ($headers) {
$debug .= "< \r\n";
$headers = [];
}
$info['http_code'] = (int) $m[1];
} elseif (2 === \count($m = explode(':', $h, 2))) {
$headers[strtolower($m[0])][] = ltrim($m[1]);
}
$debug .= "< {$h}\r\n";
$info['response_headers'][] = $h;
}
$debug .= "< \r\n";
}
/**
* Ensures the request is always sent and that the response code was checked.
*/
private function doDestruct(): void
{
$this->shouldBuffer = true;
if ($this->initializer && null === $this->info['error']) {
self::initialize($this);
$this->checkStatusCode();
}
}
/**
* Implements an event loop based on a buffer activity queue.
*
* @param iterable<array-key, self> $responses
*
* @internal
*/
public static function stream(iterable $responses, ?float $timeout = null): \Generator
{
$runningResponses = [];
foreach ($responses as $response) {
self::schedule($response, $runningResponses);
}
$lastActivity = hrtime(true) / 1E9;
$elapsedTimeout = 0;
if ((0.0 === $timeout && '-0' === (string) $timeout) || 0 > $timeout) {
$timeout = $timeout ? -$timeout : null;
/** @var ClientState $multi */
foreach ($runningResponses as [$multi]) {
if (null !== $multi->lastTimeout) {
$elapsedTimeout = max($elapsedTimeout, $lastActivity - $multi->lastTimeout);
}
}
}
while (true) {
$hasActivity = false;
$timeoutMax = 0;
$timeoutMin = $timeout ?? \INF;
/** @var ClientState $multi */
foreach ($runningResponses as $i => [$multi, &$responses]) {
self::perform($multi, $responses);
foreach ($responses as $j => $response) {
$timeoutMax = $timeout ?? max($timeoutMax, $response->timeout);
$timeoutMin = min($timeoutMin, $response->timeout, 1);
$chunk = false;
if (isset($multi->handlesActivity[$j])) {
$multi->lastTimeout = null;
$elapsedTimeout = 0;
} elseif (!isset($multi->openHandles[$j])) {
$hasActivity = true;
unset($responses[$j]);
continue;
} elseif ($elapsedTimeout >= $timeoutMax) {
$multi->handlesActivity[$j] = [new ErrorChunk($response->offset, \sprintf('Idle timeout reached for "%s".', $response->getInfo('url')))];
$multi->lastTimeout ??= $lastActivity;
$elapsedTimeout = $timeoutMax;
} else {
continue;
}
$lastActivity = null;
$hasActivity = true;
while ($multi->handlesActivity[$j] ?? false) {
if (\is_string($chunk = array_shift($multi->handlesActivity[$j]))) {
if (null !== $response->inflate && false === $chunk = @inflate_add($response->inflate, $chunk)) {
$multi->handlesActivity[$j] = [null, new TransportException(\sprintf('Error while processing content unencoding for "%s".', $response->getInfo('url')))];
continue;
}
if ('' !== $chunk && null !== $response->content && \strlen($chunk) !== fwrite($response->content, $chunk)) {
$multi->handlesActivity[$j] = [null, new TransportException(\sprintf('Failed writing %d bytes to the response buffer.', \strlen($chunk)))];
continue;
}
$chunkLen = \strlen($chunk);
$chunk = new DataChunk($response->offset, $chunk);
$response->offset += $chunkLen;
} elseif (null === $chunk) {
$e = $multi->handlesActivity[$j][0];
unset($responses[$j], $multi->handlesActivity[$j]);
$response->close();
if (null !== $e) {
$response->info['error'] = $e->getMessage();
if ($e instanceof \Error) {
throw $e;
}
$chunk = new ErrorChunk($response->offset, $e);
} else {
if (0 === $response->offset && null === $response->content) {
$response->content = fopen('php://memory', 'w+');
}
$chunk = new LastChunk($response->offset);
}
} elseif ($chunk instanceof ErrorChunk) {
unset($responses[$j]);
} elseif ($chunk instanceof FirstChunk) {
if ($response->logger) {
$info = $response->getInfo();
$response->logger->info('Response: "{http_code} {url}" {total_time} seconds', [
'http_code' => $info['http_code'],
'url' => $info['url'],
'total_time' => $info['total_time'],
]);
}
$response->inflate = \extension_loaded('zlib') && $response->inflate && 'gzip' === ($response->headers['content-encoding'][0] ?? null) ? inflate_init(\ZLIB_ENCODING_GZIP) : null;
if ($response->shouldBuffer instanceof \Closure) {
try {
$response->shouldBuffer = ($response->shouldBuffer)($response->headers);
if (null !== $response->info['error']) {
throw new TransportException($response->info['error']);
}
} catch (\Throwable $e) {
$response->close();
$multi->handlesActivity[$j] = [null, $e];
}
}
if (true === $response->shouldBuffer) {
$response->content = fopen('php://temp', 'w+');
} elseif (\is_resource($response->shouldBuffer)) {
$response->content = $response->shouldBuffer;
}
$response->shouldBuffer = null;
yield $response => $chunk;
if ($response->initializer && null === $response->info['error']) {
// Ensure the HTTP status code is always checked
$response->getHeaders(true);
}
continue;
}
yield $response => $chunk;
}
unset($multi->handlesActivity[$j]);
if ($chunk instanceof ErrorChunk && !$chunk->didThrow()) {
// Ensure transport exceptions are always thrown
$chunk->getContent();
throw new \LogicException('A transport exception should have been thrown.');
}
}
if (!$responses) {
$hasActivity = true;
unset($runningResponses[$i]);
}
// Prevent memory leaks
$multi->handlesActivity = $multi->handlesActivity ?: [];
$multi->openHandles = $multi->openHandles ?: [];
}
if (!$runningResponses) {
break;
}
if ($hasActivity) {
$lastActivity ??= hrtime(true) / 1E9;
continue;
}
if (-1 === self::select($multi, min($timeoutMin, $timeoutMax - $elapsedTimeout))) {
usleep((int) min(500, 1E6 * $timeoutMin));
}
$elapsedTimeout = hrtime(true) / 1E9 - $lastActivity;
}
}
}
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