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Direktori : /home2/selectio/public_html/myclassicfit.com-1/vendor/guzzlehttp/psr7/src/ |
Current File : /home2/selectio/public_html/myclassicfit.com-1/vendor/guzzlehttp/psr7/src/PumpStream.php |
<?php namespace GuzzleHttp\Psr7; use Psr\Http\Message\StreamInterface; /** * Provides a read only stream that pumps data from a PHP callable. * * When invoking the provided callable, the PumpStream will pass the amount of * data requested to read to the callable. The callable can choose to ignore * this value and return fewer or more bytes than requested. Any extra data * returned by the provided callable is buffered internally until drained using * the read() function of the PumpStream. The provided callable MUST return * false when there is no more data to read. * * @final */ class PumpStream implements StreamInterface { /** @var callable */ private $source; /** @var int */ private $size; /** @var int */ private $tellPos = 0; /** @var array */ private $metadata; /** @var BufferStream */ private $buffer; /** * @param callable $source Source of the stream data. The callable MAY * accept an integer argument used to control the * amount of data to return. The callable MUST * return a string when called, or false on error * or EOF. * @param array $options Stream options: * - metadata: Hash of metadata to use with stream. * - size: Size of the stream, if known. */ public function __construct(callable $source, array $options = []) { $this->source = $source; $this->size = isset($options['size']) ? $options['size'] : null; $this->metadata = isset($options['metadata']) ? $options['metadata'] : []; $this->buffer = new BufferStream(); } public function __toString() { try { return Utils::copyToString($this); } catch (\Exception $e) { return ''; } } public function close() { $this->detach(); } public function detach() { $this->tellPos = false; $this->source = null; return null; } public function getSize() { return $this->size; } public function tell() { return $this->tellPos; } public function eof() { return !$this->source; } public function isSeekable() { return false; } public function rewind() { $this->seek(0); } public function seek($offset, $whence = SEEK_SET) { throw new \RuntimeException('Cannot seek a PumpStream'); } public function isWritable() { return false; } public function write($string) { throw new \RuntimeException('Cannot write to a PumpStream'); } public function isReadable() { return true; } public function read($length) { $data = $this->buffer->read($length); $readLen = strlen($data); $this->tellPos += $readLen; $remaining = $length - $readLen; if ($remaining) { $this->pump($remaining); $data .= $this->buffer->read($remaining); $this->tellPos += strlen($data) - $readLen; } return $data; } public function getContents() { $result = ''; while (!$this->eof()) { $result .= $this->read(1000000); } return $result; } public function getMetadata($key = null) { if (!$key) { return $this->metadata; } return isset($this->metadata[$key]) ? $this->metadata[$key] : null; } private function pump($length) { if ($this->source) { do { $data = call_user_func($this->source, $length); if ($data === false || $data === null) { $this->source = null; return; } $this->buffer->write($data); $length -= strlen($data); } while ($length > 0); } } }