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Edit File : Stream.php \| Size : 8.07 KB
<?php /** * @see https://github.com/zendframework/zend-diactoros for the canonical source repository * @copyright Copyright (c) 2015-2018 Zend Technologies USA Inc. (http://www.zend.com) * @license https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License / declare(strict_types=1); namespace Zend\Diactoros; use Psr\Http\Message\StreamInterface; use RuntimeException; use function array_key_exists; use function fclose; use function feof; use function fopen; use function fread; use function fseek; use function fstat; use function ftell; use function fwrite; use function get_resource_type; use function is_int; use function is_resource; use function is_string; use function restore_error_handler; use function set_error_handler; use function stream_get_contents; use function stream_get_meta_data; use function strstr; use const E_WARNING; use const SEEK_SET; /* * Implementation of PSR HTTP streams / class Stream implements StreamInterface { /* * @var resource\|null / protected $resource; /* * @var string\|resource / protected $stream; /* * @param string\|resource $stream * @param string $mode Mode with which to open stream * @throws Exception\InvalidArgumentException / public function __construct($stream, string $mode = 'r') { $this->setStream($stream, $mode); } /* * {@inheritdoc} / public function __toString() : string { if (! $this->isReadable()) { return ''; } try { if ($this->isSeekable()) { $this->rewind(); } return $this->getContents(); } catch (RuntimeException $e) { return ''; } } /* * {@inheritdoc} / public function close() : void { if (! $this->resource) { return; } $resource = $this->detach(); fclose($resource); } /* * {@inheritdoc} / public function detach() { $resource = $this->resource; $this->resource = null; return $resource; } /* * Attach a new stream/resource to the instance. * * @param string\|resource $resource * @param string $mode * @throws Exception\InvalidArgumentException for stream identifier that cannot be * cast to a resource * @throws Exception\InvalidArgumentException for non-resource stream / public function attach($resource, string $mode = 'r') : void { $this->setStream($resource, $mode); } /* * {@inheritdoc} / public function getSize() : ?int { if (null === $this->resource) { return null; } $stats = fstat($this->resource); if ($stats !== false) { return $stats['size']; } return null; } /* * {@inheritdoc} / public function tell() : int { if (! $this->resource) { throw Exception\UntellableStreamException::dueToMissingResource(); } $result = ftell($this->resource); if (! is_int($result)) { throw Exception\UntellableStreamException::dueToPhpError(); } return $result; } /* * {@inheritdoc} / public function eof() : bool { if (! $this->resource) { return true; } return feof($this->resource); } /* * {@inheritdoc} / public function isSeekable() : bool { if (! $this->resource) { return false; } $meta = stream_get_meta_data($this->resource); return $meta['seekable']; } /* * {@inheritdoc} / public function seek($offset, $whence = SEEK_SET) : void { if (! $this->resource) { throw Exception\UnseekableStreamException::dueToMissingResource(); } if (! $this->isSeekable()) { throw Exception\UnseekableStreamException::dueToConfiguration(); } $result = fseek($this->resource, $offset, $whence); if (0 !== $result) { throw Exception\UnseekableStreamException::dueToPhpError(); } } /* * {@inheritdoc} / public function rewind() : void { $this->seek(0); } /* * {@inheritdoc} / public function isWritable() : bool { if (! $this->resource) { return false; } $meta = stream_get_meta_data($this->resource); $mode = $meta['mode']; return ( strstr($mode, 'x') \|\| strstr($mode, 'w') \|\| strstr($mode, 'c') \|\| strstr($mode, 'a') \|\| strstr($mode, '+') ); } /* * {@inheritdoc} / public function write($string) : int { if (! $this->resource) { throw Exception\UnwritableStreamException::dueToMissingResource(); } if (! $this->isWritable()) { throw Exception\UnwritableStreamException::dueToConfiguration(); } $result = fwrite($this->resource, $string); if (false === $result) { throw Exception\UnwritableStreamException::dueToPhpError(); } return $result; } /* * {@inheritdoc} / public function isReadable() : bool { if (! $this->resource) { return false; } $meta = stream_get_meta_data($this->resource); $mode = $meta['mode']; return (strstr($mode, 'r') \|\| strstr($mode, '+')); } /* * {@inheritdoc} / public function read($length) : string { if (! $this->resource) { throw Exception\UnreadableStreamException::dueToMissingResource(); } if (! $this->isReadable()) { throw Exception\UnreadableStreamException::dueToConfiguration(); } $result = fread($this->resource, $length); if (false === $result) { throw Exception\UnreadableStreamException::dueToPhpError(); } return $result; } /* * {@inheritdoc} / public function getContents() : string { if (! $this->isReadable()) { throw Exception\UnreadableStreamException::dueToConfiguration(); } $result = stream_get_contents($this->resource); if (false === $result) { throw Exception\UnreadableStreamException::dueToPhpError(); } return $result; } /* * {@inheritdoc} / public function getMetadata($key = null) { if (null === $key) { return stream_get_meta_data($this->resource); } $metadata = stream_get_meta_data($this->resource); if (! array_key_exists($key, $metadata)) { return null; } return $metadata[$key]; } /* * Set the internal stream resource. * * @param string\|resource $stream String stream target or stream resource. * @param string $mode Resource mode for stream target. * @throws Exception\InvalidArgumentException for invalid streams or resources. */ private function setStream($stream, string $mode = 'r') : void { $error = null; $resource = $stream; if (is_string($stream)) { set_error_handler(function ($e) use (&$error) { if ($e !== E_WARNING) { return; } $error = $e; }); $resource = fopen($stream, $mode); restore_error_handler(); } if ($error) { throw new Exception\InvalidArgumentException('Invalid stream reference provided'); } if (! is_resource($resource) \|\| 'stream' !== get_resource_type($resource)) { throw new Exception\InvalidArgumentException( 'Invalid stream provided; must be a string stream identifier or stream resource' ); } if ($stream !== $resource) { $this->stream = $stream; } $this->resource = $resource; } } Back

Edit File : Stream.php | Size : 8.07 KB

<?php
/**
 * @see       https://github.com/zendframework/zend-diactoros for the canonical source repository
 * @copyright Copyright (c) 2015-2018 Zend Technologies USA Inc. (http://www.zend.com)
 * @license   https://github.com/zendframework/zend-diactoros/blob/master/LICENSE.md New BSD License
 */

declare(strict_types=1);

namespace Zend\Diactoros;

use Psr\Http\Message\StreamInterface;
use RuntimeException;

use function array_key_exists;
use function fclose;
use function feof;
use function fopen;
use function fread;
use function fseek;
use function fstat;
use function ftell;
use function fwrite;
use function get_resource_type;
use function is_int;
use function is_resource;
use function is_string;
use function restore_error_handler;
use function set_error_handler;
use function stream_get_contents;
use function stream_get_meta_data;
use function strstr;

use const E_WARNING;
use const SEEK_SET;

/**
 * Implementation of PSR HTTP streams
 */
class Stream implements StreamInterface
{
    /**
     * @var resource|null
     */
    protected $resource;

/**
     * @var string|resource
     */
    protected $stream;

/**
     * @param string|resource $stream
     * @param string $mode Mode with which to open stream
     * @throws Exception\InvalidArgumentException
     */
    public function __construct($stream, string $mode = 'r')
    {
        $this->setStream($stream, $mode);
    }

/**
     * {@inheritdoc}
     */
    public function __toString() : string
    {
        if (! $this->isReadable()) {
            return '';
        }

try {
            if ($this->isSeekable()) {
                $this->rewind();
            }

return $this->getContents();
        } catch (RuntimeException $e) {
            return '';
        }
    }

/**
     * {@inheritdoc}
     */
    public function close() : void
    {
        if (! $this->resource) {
            return;
        }

$resource = $this->detach();
        fclose($resource);
    }

/**
     * {@inheritdoc}
     */
    public function detach()
    {
        $resource = $this->resource;
        $this->resource = null;
        return $resource;
    }

/**
     * Attach a new stream/resource to the instance.
     *
     * @param string|resource $resource
     * @param string $mode
     * @throws Exception\InvalidArgumentException for stream identifier that cannot be
     *     cast to a resource
     * @throws Exception\InvalidArgumentException for non-resource stream
     */
    public function attach($resource, string $mode = 'r') : void
    {
        $this->setStream($resource, $mode);
    }

/**
     * {@inheritdoc}
     */
    public function getSize() : ?int
    {
        if (null === $this->resource) {
            return null;
        }

$stats = fstat($this->resource);
        if ($stats !== false) {
            return $stats['size'];
        }

return null;
    }

/**
     * {@inheritdoc}
     */
    public function tell() : int
    {
        if (! $this->resource) {
            throw Exception\UntellableStreamException::dueToMissingResource();
        }

$result = ftell($this->resource);
        if (! is_int($result)) {
            throw Exception\UntellableStreamException::dueToPhpError();
        }

return $result;
    }

/**
     * {@inheritdoc}
     */
    public function eof() : bool
    {
        if (! $this->resource) {
            return true;
        }

return feof($this->resource);
    }

/**
     * {@inheritdoc}
     */
    public function isSeekable() : bool
    {
        if (! $this->resource) {
            return false;
        }

$meta = stream_get_meta_data($this->resource);
        return $meta['seekable'];
    }

/**
     * {@inheritdoc}
     */
    public function seek($offset, $whence = SEEK_SET) : void
    {
        if (! $this->resource) {
            throw Exception\UnseekableStreamException::dueToMissingResource();
        }

if (! $this->isSeekable()) {
            throw Exception\UnseekableStreamException::dueToConfiguration();
        }

$result = fseek($this->resource, $offset, $whence);

if (0 !== $result) {
            throw Exception\UnseekableStreamException::dueToPhpError();
        }
    }

/**
     * {@inheritdoc}
     */
    public function rewind() : void
    {
        $this->seek(0);
    }

/**
     * {@inheritdoc}
     */
    public function isWritable() : bool
    {
        if (! $this->resource) {
            return false;
        }

$meta = stream_get_meta_data($this->resource);
        $mode = $meta['mode'];

return (
            strstr($mode, 'x')
            || strstr($mode, 'w')
            || strstr($mode, 'c')
            || strstr($mode, 'a')
            || strstr($mode, '+')
        );
    }

/**
     * {@inheritdoc}
     */
    public function write($string) : int
    {
        if (! $this->resource) {
            throw Exception\UnwritableStreamException::dueToMissingResource();
        }

if (! $this->isWritable()) {
            throw Exception\UnwritableStreamException::dueToConfiguration();
        }

$result = fwrite($this->resource, $string);

if (false === $result) {
            throw Exception\UnwritableStreamException::dueToPhpError();
        }

return $result;
    }

/**
     * {@inheritdoc}
     */
    public function isReadable() : bool
    {
        if (! $this->resource) {
            return false;
        }

$meta = stream_get_meta_data($this->resource);
        $mode = $meta['mode'];

return (strstr($mode, 'r') || strstr($mode, '+'));
    }

/**
     * {@inheritdoc}
     */
    public function read($length) : string
    {
        if (! $this->resource) {
            throw Exception\UnreadableStreamException::dueToMissingResource();
        }

if (! $this->isReadable()) {
            throw Exception\UnreadableStreamException::dueToConfiguration();
        }

$result = fread($this->resource, $length);

if (false === $result) {
            throw Exception\UnreadableStreamException::dueToPhpError();
        }

return $result;
    }

/**
     * {@inheritdoc}
     */
    public function getContents() : string
    {
        if (! $this->isReadable()) {
            throw Exception\UnreadableStreamException::dueToConfiguration();
        }

$result = stream_get_contents($this->resource);
        if (false === $result) {
            throw Exception\UnreadableStreamException::dueToPhpError();
        }
        return $result;
    }

/**
     * {@inheritdoc}
     */
    public function getMetadata($key = null)
    {
        if (null === $key) {
            return stream_get_meta_data($this->resource);
        }

$metadata = stream_get_meta_data($this->resource);
        if (! array_key_exists($key, $metadata)) {
            return null;
        }

return $metadata[$key];
    }

/**
     * Set the internal stream resource.
     *
     * @param string|resource $stream String stream target or stream resource.
     * @param string $mode Resource mode for stream target.
     * @throws Exception\InvalidArgumentException for invalid streams or resources.
     */
    private function setStream($stream, string $mode = 'r') : void
    {
        $error    = null;
        $resource = $stream;

if (is_string($stream)) {
            set_error_handler(function ($e) use (&$error) {
                if ($e !== E_WARNING) {
                    return;
                }

$error = $e;
            });
            $resource = fopen($stream, $mode);
            restore_error_handler();
        }

if ($error) {
            throw new Exception\InvalidArgumentException('Invalid stream reference provided');
        }

if (! is_resource($resource) || 'stream' !== get_resource_type($resource)) {
            throw new Exception\InvalidArgumentException(
                'Invalid stream provided; must be a string stream identifier or stream resource'
            );
        }

if ($stream !== $resource) {
            $this->stream = $stream;
        }

$this->resource = $resource;
    }
}

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