X-Git-Url: http://www.aleph1.co.uk/gitweb/?p=yaffs-website;a=blobdiff_plain;f=vendor%2Fguzzlehttp%2Fpsr7%2Fsrc%2FLimitStream.php;fp=vendor%2Fguzzlehttp%2Fpsr7%2Fsrc%2FLimitStream.php;h=3c13d4f41155dc292b81be222a4bde4d027a63fd;hp=0000000000000000000000000000000000000000;hb=a2bd1bf0c2c1f1a17d188f4dc0726a45494cefae;hpb=57c063afa3f66b07c4bbddc2d6129a96d90f0aad diff --git a/vendor/guzzlehttp/psr7/src/LimitStream.php b/vendor/guzzlehttp/psr7/src/LimitStream.php new file mode 100644 index 000000000..3c13d4f41 --- /dev/null +++ b/vendor/guzzlehttp/psr7/src/LimitStream.php @@ -0,0 +1,155 @@ +stream = $stream; + $this->setLimit($limit); + $this->setOffset($offset); + } + + public function eof() + { + // Always return true if the underlying stream is EOF + if ($this->stream->eof()) { + return true; + } + + // No limit and the underlying stream is not at EOF + if ($this->limit == -1) { + return false; + } + + return $this->stream->tell() >= $this->offset + $this->limit; + } + + /** + * Returns the size of the limited subset of data + * {@inheritdoc} + */ + public function getSize() + { + if (null === ($length = $this->stream->getSize())) { + return null; + } elseif ($this->limit == -1) { + return $length - $this->offset; + } else { + return min($this->limit, $length - $this->offset); + } + } + + /** + * Allow for a bounded seek on the read limited stream + * {@inheritdoc} + */ + public function seek($offset, $whence = SEEK_SET) + { + if ($whence !== SEEK_SET || $offset < 0) { + throw new \RuntimeException(sprintf( + 'Cannot seek to offset % with whence %s', + $offset, + $whence + )); + } + + $offset += $this->offset; + + if ($this->limit !== -1) { + if ($offset > $this->offset + $this->limit) { + $offset = $this->offset + $this->limit; + } + } + + $this->stream->seek($offset); + } + + /** + * Give a relative tell() + * {@inheritdoc} + */ + public function tell() + { + return $this->stream->tell() - $this->offset; + } + + /** + * Set the offset to start limiting from + * + * @param int $offset Offset to seek to and begin byte limiting from + * + * @throws \RuntimeException if the stream cannot be seeked. + */ + public function setOffset($offset) + { + $current = $this->stream->tell(); + + if ($current !== $offset) { + // If the stream cannot seek to the offset position, then read to it + if ($this->stream->isSeekable()) { + $this->stream->seek($offset); + } elseif ($current > $offset) { + throw new \RuntimeException("Could not seek to stream offset $offset"); + } else { + $this->stream->read($offset - $current); + } + } + + $this->offset = $offset; + } + + /** + * Set the limit of bytes that the decorator allows to be read from the + * stream. + * + * @param int $limit Number of bytes to allow to be read from the stream. + * Use -1 for no limit. + */ + public function setLimit($limit) + { + $this->limit = $limit; + } + + public function read($length) + { + if ($this->limit == -1) { + return $this->stream->read($length); + } + + // Check if the current position is less than the total allowed + // bytes + original offset + $remaining = ($this->offset + $this->limit) - $this->stream->tell(); + if ($remaining > 0) { + // Only return the amount of requested data, ensuring that the byte + // limit is not exceeded + return $this->stream->read(min($remaining, $length)); + } + + return ''; + } +}