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David Stone
235
dependencies/guzzlehttp/psr7/src/Stream.php
vendored
Normal file
235
dependencies/guzzlehttp/psr7/src/Stream.php
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<?php
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declare (strict_types=1);
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namespace WP_Ultimo\Dependencies\GuzzleHttp\Psr7;
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use WP_Ultimo\Dependencies\Psr\Http\Message\StreamInterface;
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/**
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* PHP stream implementation.
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*/
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class Stream implements StreamInterface
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{
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/**
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* @see http://php.net/manual/function.fopen.php
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* @see http://php.net/manual/en/function.gzopen.php
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*/
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private const READABLE_MODES = '/r|a\\+|ab\\+|w\\+|wb\\+|x\\+|xb\\+|c\\+|cb\\+/';
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private const WRITABLE_MODES = '/a|w|r\\+|rb\\+|rw|x|c/';
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/** @var resource */
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private $stream;
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/** @var int|null */
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private $size;
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/** @var bool */
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private $seekable;
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/** @var bool */
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private $readable;
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/** @var bool */
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private $writable;
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/** @var string|null */
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private $uri;
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/** @var mixed[] */
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private $customMetadata;
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/**
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* This constructor accepts an associative array of options.
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*
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* - size: (int) If a read stream would otherwise have an indeterminate
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* size, but the size is known due to foreknowledge, then you can
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* provide that size, in bytes.
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* - metadata: (array) Any additional metadata to return when the metadata
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* of the stream is accessed.
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*
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* @param resource $stream Stream resource to wrap.
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* @param array{size?: int, metadata?: array} $options Associative array of options.
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*
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* @throws \InvalidArgumentException if the stream is not a stream resource
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*/
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public function __construct($stream, array $options = [])
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{
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if (!\is_resource($stream)) {
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throw new \InvalidArgumentException('Stream must be a resource');
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}
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if (isset($options['size'])) {
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$this->size = $options['size'];
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}
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$this->customMetadata = $options['metadata'] ?? [];
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$this->stream = $stream;
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$meta = \stream_get_meta_data($this->stream);
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$this->seekable = $meta['seekable'];
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$this->readable = (bool) \preg_match(self::READABLE_MODES, $meta['mode']);
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$this->writable = (bool) \preg_match(self::WRITABLE_MODES, $meta['mode']);
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$this->uri = $this->getMetadata('uri');
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}
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/**
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* Closes the stream when the destructed
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*/
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public function __destruct()
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{
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$this->close();
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}
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public function __toString() : string
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{
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try {
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if ($this->isSeekable()) {
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$this->seek(0);
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}
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return $this->getContents();
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} catch (\Throwable $e) {
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if (\PHP_VERSION_ID >= 70400) {
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throw $e;
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}
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\trigger_error(\sprintf('%s::__toString exception: %s', self::class, (string) $e), \E_USER_ERROR);
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return '';
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}
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}
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public function getContents() : string
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{
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if (!isset($this->stream)) {
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throw new \RuntimeException('Stream is detached');
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}
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if (!$this->readable) {
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throw new \RuntimeException('Cannot read from non-readable stream');
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}
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return Utils::tryGetContents($this->stream);
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}
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public function close() : void
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{
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if (isset($this->stream)) {
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if (\is_resource($this->stream)) {
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\fclose($this->stream);
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}
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$this->detach();
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}
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}
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public function detach()
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{
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if (!isset($this->stream)) {
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return null;
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}
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$result = $this->stream;
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unset($this->stream);
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$this->size = $this->uri = null;
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$this->readable = $this->writable = $this->seekable = \false;
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return $result;
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}
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public function getSize() : ?int
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{
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if ($this->size !== null) {
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return $this->size;
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}
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if (!isset($this->stream)) {
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return null;
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}
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// Clear the stat cache if the stream has a URI
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if ($this->uri) {
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\clearstatcache(\true, $this->uri);
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}
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$stats = \fstat($this->stream);
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if (\is_array($stats) && isset($stats['size'])) {
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$this->size = $stats['size'];
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return $this->size;
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}
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return null;
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}
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public function isReadable() : bool
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{
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return $this->readable;
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}
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public function isWritable() : bool
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{
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return $this->writable;
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}
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public function isSeekable() : bool
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{
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return $this->seekable;
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}
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public function eof() : bool
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{
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if (!isset($this->stream)) {
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throw new \RuntimeException('Stream is detached');
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}
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return \feof($this->stream);
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}
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public function tell() : int
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{
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if (!isset($this->stream)) {
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throw new \RuntimeException('Stream is detached');
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}
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$result = \ftell($this->stream);
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if ($result === \false) {
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throw new \RuntimeException('Unable to determine stream position');
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}
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return $result;
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}
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public function rewind() : void
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{
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$this->seek(0);
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}
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public function seek($offset, $whence = \SEEK_SET) : void
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{
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$whence = (int) $whence;
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if (!isset($this->stream)) {
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throw new \RuntimeException('Stream is detached');
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}
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if (!$this->seekable) {
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throw new \RuntimeException('Stream is not seekable');
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}
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if (\fseek($this->stream, $offset, $whence) === -1) {
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throw new \RuntimeException('Unable to seek to stream position ' . $offset . ' with whence ' . \var_export($whence, \true));
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}
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}
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public function read($length) : string
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{
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if (!isset($this->stream)) {
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throw new \RuntimeException('Stream is detached');
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}
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if (!$this->readable) {
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throw new \RuntimeException('Cannot read from non-readable stream');
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}
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if ($length < 0) {
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throw new \RuntimeException('Length parameter cannot be negative');
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}
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if (0 === $length) {
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return '';
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}
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try {
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$string = \fread($this->stream, $length);
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} catch (\Exception $e) {
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throw new \RuntimeException('Unable to read from stream', 0, $e);
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}
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if (\false === $string) {
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throw new \RuntimeException('Unable to read from stream');
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}
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return $string;
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}
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public function write($string) : int
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{
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if (!isset($this->stream)) {
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throw new \RuntimeException('Stream is detached');
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}
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if (!$this->writable) {
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throw new \RuntimeException('Cannot write to a non-writable stream');
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}
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// We can't know the size after writing anything
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$this->size = null;
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$result = \fwrite($this->stream, $string);
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if ($result === \false) {
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throw new \RuntimeException('Unable to write to stream');
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}
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return $result;
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}
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/**
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* @return mixed
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*/
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public function getMetadata($key = null)
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{
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if (!isset($this->stream)) {
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return $key ? null : [];
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} elseif (!$key) {
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return $this->customMetadata + \stream_get_meta_data($this->stream);
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} elseif (isset($this->customMetadata[$key])) {
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return $this->customMetadata[$key];
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}
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$meta = \stream_get_meta_data($this->stream);
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return $meta[$key] ?? null;
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}
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}
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