314 lines
9.1 KiB
PHP
314 lines
9.1 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\Contracts\HttpClient\Exception\ExceptionInterface;
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use Symfony\Contracts\HttpClient\HttpClientInterface;
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use Symfony\Contracts\HttpClient\ResponseInterface;
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/**
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* Allows turning ResponseInterface instances to PHP streams.
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*
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* @author Nicolas Grekas <p@tchwork.com>
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*/
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class StreamWrapper
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{
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/** @var resource|null */
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public $context;
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/** @var HttpClientInterface */
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private $client;
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/** @var ResponseInterface */
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private $response;
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/** @var resource|string|null */
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private $content;
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/** @var resource|null */
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private $handle;
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private $blocking = true;
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private $timeout;
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private $eof = false;
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private $offset = 0;
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/**
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* Creates a PHP stream resource from a ResponseInterface.
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*
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* @return resource
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*/
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public static function createResource(ResponseInterface $response, ?HttpClientInterface $client = null)
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{
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if ($response instanceof StreamableInterface) {
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$stack = debug_backtrace(\DEBUG_BACKTRACE_PROVIDE_OBJECT | \DEBUG_BACKTRACE_IGNORE_ARGS, 2);
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if ($response !== ($stack[1]['object'] ?? null)) {
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return $response->toStream(false);
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}
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}
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if (null === $client && !method_exists($response, 'stream')) {
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throw new \InvalidArgumentException(sprintf('Providing a client to "%s()" is required when the response doesn\'t have any "stream()" method.', __CLASS__));
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}
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static $registered = false;
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if (!$registered = $registered || stream_wrapper_register(strtr(__CLASS__, '\\', '-'), __CLASS__)) {
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throw new \RuntimeException(error_get_last()['message'] ?? 'Registering the "symfony" stream wrapper failed.');
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}
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$context = [
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'client' => $client ?? $response,
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'response' => $response,
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];
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return fopen(strtr(__CLASS__, '\\', '-').'://'.$response->getInfo('url'), 'r', false, stream_context_create(['symfony' => $context]));
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}
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public function getResponse(): ResponseInterface
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{
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return $this->response;
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}
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/**
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* @param resource|callable|null $handle The resource handle that should be monitored when
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* stream_select() is used on the created stream
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* @param resource|null $content The seekable resource where the response body is buffered
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*/
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public function bindHandles(&$handle, &$content): void
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{
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$this->handle = &$handle;
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$this->content = &$content;
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$this->offset = null;
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}
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public function stream_open(string $path, string $mode, int $options): bool
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{
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if ('r' !== $mode) {
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if ($options & \STREAM_REPORT_ERRORS) {
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trigger_error(sprintf('Invalid mode "%s": only "r" is supported.', $mode), \E_USER_WARNING);
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}
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return false;
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}
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$context = stream_context_get_options($this->context)['symfony'] ?? null;
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$this->client = $context['client'] ?? null;
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$this->response = $context['response'] ?? null;
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$this->context = null;
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if (null !== $this->client && null !== $this->response) {
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return true;
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}
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if ($options & \STREAM_REPORT_ERRORS) {
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trigger_error('Missing options "client" or "response" in "symfony" stream context.', \E_USER_WARNING);
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}
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return false;
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}
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public function stream_read(int $count)
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{
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if (\is_resource($this->content)) {
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// Empty the internal activity list
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foreach ($this->client->stream([$this->response], 0) as $chunk) {
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try {
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if (!$chunk->isTimeout() && $chunk->isFirst()) {
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$this->response->getStatusCode(); // ignore 3/4/5xx
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}
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} catch (ExceptionInterface $e) {
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trigger_error($e->getMessage(), \E_USER_WARNING);
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return false;
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}
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}
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if (0 !== fseek($this->content, $this->offset ?? 0)) {
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return false;
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}
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if ('' !== $data = fread($this->content, $count)) {
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fseek($this->content, 0, \SEEK_END);
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$this->offset += \strlen($data);
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return $data;
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}
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}
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if (\is_string($this->content)) {
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if (\strlen($this->content) <= $count) {
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$data = $this->content;
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$this->content = null;
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} else {
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$data = substr($this->content, 0, $count);
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$this->content = substr($this->content, $count);
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}
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$this->offset += \strlen($data);
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return $data;
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}
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foreach ($this->client->stream([$this->response], $this->blocking ? $this->timeout : 0) as $chunk) {
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try {
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$this->eof = true;
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$this->eof = !$chunk->isTimeout();
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if (!$this->eof && !$this->blocking) {
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return '';
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}
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$this->eof = $chunk->isLast();
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if ($chunk->isFirst()) {
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$this->response->getStatusCode(); // ignore 3/4/5xx
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}
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if ('' !== $data = $chunk->getContent()) {
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if (\strlen($data) > $count) {
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if (null === $this->content) {
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$this->content = substr($data, $count);
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}
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$data = substr($data, 0, $count);
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}
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$this->offset += \strlen($data);
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return $data;
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}
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} catch (ExceptionInterface $e) {
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trigger_error($e->getMessage(), \E_USER_WARNING);
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return false;
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}
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}
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return '';
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}
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public function stream_set_option(int $option, int $arg1, ?int $arg2): bool
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{
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if (\STREAM_OPTION_BLOCKING === $option) {
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$this->blocking = (bool) $arg1;
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} elseif (\STREAM_OPTION_READ_TIMEOUT === $option) {
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$this->timeout = $arg1 + $arg2 / 1e6;
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} else {
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return false;
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}
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return true;
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}
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public function stream_tell(): int
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{
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return $this->offset ?? 0;
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}
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public function stream_eof(): bool
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{
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return $this->eof && !\is_string($this->content);
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}
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public function stream_seek(int $offset, int $whence = \SEEK_SET): bool
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{
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if (null === $this->content && null === $this->offset) {
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$this->response->getStatusCode();
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$this->offset = 0;
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}
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if (!\is_resource($this->content) || 0 !== fseek($this->content, 0, \SEEK_END)) {
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return false;
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}
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$size = ftell($this->content);
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if (\SEEK_CUR === $whence) {
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$offset += $this->offset ?? 0;
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}
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if (\SEEK_END === $whence || $size < $offset) {
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foreach ($this->client->stream([$this->response]) as $chunk) {
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try {
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if ($chunk->isFirst()) {
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$this->response->getStatusCode(); // ignore 3/4/5xx
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}
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// Chunks are buffered in $this->content already
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$size += \strlen($chunk->getContent());
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if (\SEEK_END !== $whence && $offset <= $size) {
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break;
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}
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} catch (ExceptionInterface $e) {
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trigger_error($e->getMessage(), \E_USER_WARNING);
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return false;
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}
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}
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if (\SEEK_END === $whence) {
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$offset += $size;
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}
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}
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if (0 <= $offset && $offset <= $size) {
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$this->eof = false;
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$this->offset = $offset;
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return true;
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}
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return false;
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}
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public function stream_cast(int $castAs)
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{
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if (\STREAM_CAST_FOR_SELECT === $castAs) {
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$this->response->getHeaders(false);
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return (\is_callable($this->handle) ? ($this->handle)() : $this->handle) ?? false;
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}
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return false;
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}
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public function stream_stat(): array
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{
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try {
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$headers = $this->response->getHeaders(false);
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} catch (ExceptionInterface $e) {
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trigger_error($e->getMessage(), \E_USER_WARNING);
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$headers = [];
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}
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return [
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'dev' => 0,
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'ino' => 0,
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'mode' => 33060,
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'nlink' => 0,
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'uid' => 0,
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'gid' => 0,
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'rdev' => 0,
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'size' => (int) ($headers['content-length'][0] ?? -1),
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'atime' => 0,
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'mtime' => strtotime($headers['last-modified'][0] ?? '') ?: 0,
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'ctime' => 0,
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'blksize' => 0,
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'blocks' => 0,
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];
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}
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private function __construct()
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{
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}
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}
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