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Edit File : PumpStream.php \| Size : 3.94 KB
<?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. / 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'] : []; $this->buffer = new BufferStream(); } public function __toString() { try { return copy_to_string($this); } catch (\Exception $e) { return ''; } } public function close() { $this->detach(); } public function detach() { $this->tellPos = false; $this->source = 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); } } } Back

Edit File : PumpStream.php | Size : 3.94 KB

<?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.
 */
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 copy_to_string($this);
        } catch (\Exception $e) {
            return '';
        }
    }

public function close()
    {
        $this->detach();
    }

public function detach()
    {
        $this->tellPos = false;
        $this->source = 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);
        }
    }
}

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