diff options
Diffstat (limited to 'vendor/guzzlehttp/psr7/src/Stream.php')
| -rw-r--r-- | vendor/guzzlehttp/psr7/src/Stream.php | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/vendor/guzzlehttp/psr7/src/Stream.php b/vendor/guzzlehttp/psr7/src/Stream.php new file mode 100644 index 0000000..3865d6d --- /dev/null +++ b/vendor/guzzlehttp/psr7/src/Stream.php @@ -0,0 +1,270 @@ +<?php + +namespace GuzzleHttp\Psr7; + +use Psr\Http\Message\StreamInterface; + +/** + * PHP stream implementation. + * + * @var $stream + */ +class Stream implements StreamInterface +{ + /** + * Resource modes. + * + * @var string + * + * @see http://php.net/manual/function.fopen.php + * @see http://php.net/manual/en/function.gzopen.php + */ + const READABLE_MODES = '/r|a\+|ab\+|w\+|wb\+|x\+|xb\+|c\+|cb\+/'; + const WRITABLE_MODES = '/a|w|r\+|rb\+|rw|x|c/'; + + private $stream; + private $size; + private $seekable; + private $readable; + private $writable; + private $uri; + private $customMetadata; + + /** + * This constructor accepts an associative array of options. + * + * - size: (int) If a read stream would otherwise have an indeterminate + * size, but the size is known due to foreknowledge, then you can + * provide that size, in bytes. + * - metadata: (array) Any additional metadata to return when the metadata + * of the stream is accessed. + * + * @param resource $stream Stream resource to wrap. + * @param array $options Associative array of options. + * + * @throws \InvalidArgumentException if the stream is not a stream resource + */ + public function __construct($stream, $options = []) + { + if (!is_resource($stream)) { + throw new \InvalidArgumentException('Stream must be a resource'); + } + + if (isset($options['size'])) { + $this->size = $options['size']; + } + + $this->customMetadata = isset($options['metadata']) + ? $options['metadata'] + : []; + + $this->stream = $stream; + $meta = stream_get_meta_data($this->stream); + $this->seekable = $meta['seekable']; + $this->readable = (bool)preg_match(self::READABLE_MODES, $meta['mode']); + $this->writable = (bool)preg_match(self::WRITABLE_MODES, $meta['mode']); + $this->uri = $this->getMetadata('uri'); + } + + /** + * Closes the stream when the destructed + */ + public function __destruct() + { + $this->close(); + } + + public function __toString() + { + try { + if ($this->isSeekable()) { + $this->seek(0); + } + return $this->getContents(); + } catch (\Exception $e) { + return ''; + } + } + + public function getContents() + { + if (!isset($this->stream)) { + throw new \RuntimeException('Stream is detached'); + } + + $contents = stream_get_contents($this->stream); + + if ($contents === false) { + throw new \RuntimeException('Unable to read stream contents'); + } + + return $contents; + } + + public function close() + { + if (isset($this->stream)) { + if (is_resource($this->stream)) { + fclose($this->stream); + } + $this->detach(); + } + } + + public function detach() + { + if (!isset($this->stream)) { + return null; + } + + $result = $this->stream; + unset($this->stream); + $this->size = $this->uri = null; + $this->readable = $this->writable = $this->seekable = false; + + return $result; + } + + public function getSize() + { + if ($this->size !== null) { + return $this->size; + } + + if (!isset($this->stream)) { + return null; + } + + // Clear the stat cache if the stream has a URI + if ($this->uri) { + clearstatcache(true, $this->uri); + } + + $stats = fstat($this->stream); + if (isset($stats['size'])) { + $this->size = $stats['size']; + return $this->size; + } + + return null; + } + + public function isReadable() + { + return $this->readable; + } + + public function isWritable() + { + return $this->writable; + } + + public function isSeekable() + { + return $this->seekable; + } + + public function eof() + { + if (!isset($this->stream)) { + throw new \RuntimeException('Stream is detached'); + } + + return feof($this->stream); + } + + public function tell() + { + if (!isset($this->stream)) { + throw new \RuntimeException('Stream is detached'); + } + + $result = ftell($this->stream); + + if ($result === false) { + throw new \RuntimeException('Unable to determine stream position'); + } + + return $result; + } + + public function rewind() + { + $this->seek(0); + } + + public function seek($offset, $whence = SEEK_SET) + { + $whence = (int) $whence; + + if (!isset($this->stream)) { + throw new \RuntimeException('Stream is detached'); + } + if (!$this->seekable) { + throw new \RuntimeException('Stream is not seekable'); + } + if (fseek($this->stream, $offset, $whence) === -1) { + throw new \RuntimeException('Unable to seek to stream position ' + . $offset . ' with whence ' . var_export($whence, true)); + } + } + + public function read($length) + { + if (!isset($this->stream)) { + throw new \RuntimeException('Stream is detached'); + } + if (!$this->readable) { + throw new \RuntimeException('Cannot read from non-readable stream'); + } + if ($length < 0) { + throw new \RuntimeException('Length parameter cannot be negative'); + } + + if (0 === $length) { + return ''; + } + + $string = fread($this->stream, $length); + if (false === $string) { + throw new \RuntimeException('Unable to read from stream'); + } + + return $string; + } + + public function write($string) + { + if (!isset($this->stream)) { + throw new \RuntimeException('Stream is detached'); + } + if (!$this->writable) { + throw new \RuntimeException('Cannot write to a non-writable stream'); + } + + // We can't know the size after writing anything + $this->size = null; + $result = fwrite($this->stream, $string); + + if ($result === false) { + throw new \RuntimeException('Unable to write to stream'); + } + + return $result; + } + + public function getMetadata($key = null) + { + if (!isset($this->stream)) { + return $key ? null : []; + } elseif (!$key) { + return $this->customMetadata + stream_get_meta_data($this->stream); + } elseif (isset($this->customMetadata[$key])) { + return $this->customMetadata[$key]; + } + + $meta = stream_get_meta_data($this->stream); + + return isset($meta[$key]) ? $meta[$key] : null; + } +} |