/usr/share/php/GuzzleHttp/Stream/LimitStream.php is in php-guzzle-stream 3.0.0-5.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 | <?php
namespace GuzzleHttp\Stream;
use GuzzleHttp\Stream\Exception\SeekException;
/**
* Decorator used to return only a subset of a stream
*/
class LimitStream implements StreamInterface
{
use StreamDecoratorTrait;
/** @var int Offset to start reading from */
private $offset;
/** @var int Limit the number of bytes that can be read */
private $limit;
/**
* @param StreamInterface $stream Stream to wrap
* @param int $limit Total number of bytes to allow to be read
* from the stream. Pass -1 for no limit.
* @param int|null $offset Position to seek to before reading (only
* works on seekable streams).
*/
public function __construct(
StreamInterface $stream,
$limit = -1,
$offset = 0
) {
$this->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;
}
$tell = $this->stream->tell();
if ($tell === false) {
return false;
}
return $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) {
return false;
}
$offset += $this->offset;
if ($this->limit !== -1) {
if ($offset > $this->offset + $this->limit) {
$offset = $this->offset + $this->limit;
}
}
return $this->stream->seek($offset);
}
/**
* Give a relative tell()
* {@inheritdoc}
*/
public function tell()
{
return $this->stream->tell() - $this->offset;
}
/**
* Set the offset to start limiting from
*
* @param int $offset Offset to seek to and begin byte limiting from
*
* @return self
* @throws SeekException
*/
public function setOffset($offset)
{
$current = $this->stream->tell();
if ($current !== $offset) {
// If the stream cannot seek to the offset position, then read to it
if (!$this->stream->seek($offset)) {
if ($current > $offset) {
throw new SeekException($this, $offset);
} else {
$this->stream->read($offset - $current);
}
}
}
$this->offset = $offset;
return $this;
}
/**
* Set the limit of bytes that the decorator allows to be read from the
* stream.
*
* @param int $limit Number of bytes to allow to be read from the stream.
* Use -1 for no limit.
* @return self
*/
public function setLimit($limit)
{
$this->limit = $limit;
return $this;
}
public function read($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));
} else {
return false;
}
}
}
|