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Файл: system/vendor/guzzlehttp/psr7/src/Stream.php
Строк: 225
<?php
namespace GuzzleHttpPsr7;

use 
PsrHttpMessageStreamInterface;

/**
 * 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 {
            
$this->seek(0);
            return (string) 
stream_get_contents($this->stream);
        } 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 '
                
$offset ' with whence ' var_export($whencetrue));
        }
    }

    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 (
=== $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;
    }
}
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