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