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<?php |
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/* |
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* This file is part of the Koded package. |
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* |
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* (c) Mihail Binev <[email protected]> |
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* |
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* Please view the LICENSE distributed with this source code |
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* for the full copyright and license information. |
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* |
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*/ |
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namespace Koded\Http; |
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use Koded\Http\Interfaces\HttpStatus; |
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use Psr\Http\Message\StreamInterface; |
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class Stream implements StreamInterface |
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{ |
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protected const MODES = [ |
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'w+' => 1, |
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'r+' => 1, |
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'x+' => 1, |
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'c+' => 1, |
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'a+' => 1, |
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'w+b' => 1, |
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'r+b' => 1, |
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'x+b' => 1, |
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'c+b' => 1, |
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'w+t' => 1, |
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'r+t' => 1, |
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'x+t' => 1, |
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'c+t' => 1 |
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]; |
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/** @var resource The underlying stream resource */ |
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protected $stream; |
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protected string $mode = 'w+b'; |
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protected bool $seekable = false; |
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public function __construct($stream) |
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{ |
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if (false === \is_resource($stream) || 'stream' !== \get_resource_type($stream)) { |
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throw new \RuntimeException( |
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'The provided resource is not a valid stream resource, ' . \gettype($stream) . ' given.', |
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HttpStatus::UNPROCESSABLE_ENTITY |
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); |
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} |
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$metadata = \stream_get_meta_data($stream); |
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$this->mode = $metadata['mode'] ?? 'w+b'; |
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$this->seekable = $metadata['seekable'] ?? false; |
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$this->stream = $stream; |
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} |
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public function __destruct() |
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{ |
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$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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$this->seek(0); |
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return $this->getContents(); |
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} catch (\Throwable) { |
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return ''; |
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} |
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} |
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public function close(): void |
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{ |
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if ($this->stream) { |
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\fclose($this->stream); |
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$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 (empty($this->stream)) { |
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return null; |
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} |
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$resource = $this->stream; |
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$this->mode = 'w+b'; |
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$this->stream = null; |
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$this->seekable = false; |
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return $resource; |
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} |
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public function getSize(): ?int |
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{ |
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if (empty($this->stream)) { |
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return null; |
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} |
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return \fstat($this->stream)['size'] ?? null; |
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} |
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public function tell(): int |
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{ |
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if (false === $position = \ftell($this->stream)) { |
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throw new \RuntimeException('Failed to find the position of the file pointer'); |
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} |
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return $position; |
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} |
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public function eof(): bool |
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{ |
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return \feof($this->stream); |
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} |
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public function seek($offset, $whence = SEEK_SET): void |
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{ |
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if (0 !== @\fseek($this->stream, $offset, $whence)) { |
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throw new \RuntimeException('Failed to seek to file pointer'); |
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} |
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} |
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public function rewind(): void |
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{ |
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if (false === $this->seekable) { |
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throw new \RuntimeException('The stream is not seekable'); |
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} |
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$this->seek(0); |
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} |
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public function write($string): int |
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{ |
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if (false === $this->isWritable()) { |
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throw new \RuntimeException('The stream is not writable'); |
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} |
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if (false === $bytes = \fwrite($this->stream, $string)) { |
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throw new \RuntimeException('Failed to write data to the stream'); |
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} |
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return $bytes; |
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} |
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public function read($length): string |
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{ |
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if (false === $this->isReadable()) { |
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throw new \RuntimeException('The stream is not readable'); |
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} |
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if (empty($length)) { |
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return ''; |
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} |
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if (false === $data = \fread($this->stream, $length)) { |
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throw new \RuntimeException('Failed to read the data from stream'); |
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} |
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return $data; |
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} |
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public function getContents(): string |
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{ |
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if (false === $content = \stream_get_contents($this->stream)) { |
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throw new \RuntimeException('Unable to read the stream content'); |
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} |
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return $content; |
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} |
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public function getMetadata($key = null) |
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{ |
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$metadata = \stream_get_meta_data($this->stream); |
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if (null === $key) { |
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return $metadata; |
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} |
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return $metadata[$key] ?? null; |
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} |
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public function isSeekable(): bool |
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{ |
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return $this->seekable; |
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} |
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public function isReadable(): bool |
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{ |
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return isset((self::MODES + ['r' => 1, 'rb' => 1, 'rt' => 1])[$this->mode]); |
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} |
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public function isWritable(): bool |
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{ |
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return isset((self::MODES + ['w' => 1, 'rw' => 1, 'a' => 1, 'wb' => 1])[$this->mode]); |
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} |
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} |
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