ILIAS\Filesystem\Stream\Stream Class Reference

Class Stream. More...

Inheritance diagram for ILIAS\Filesystem\Stream\Stream:

Collaboration diagram for ILIAS\Filesystem\Stream\Stream:

Public Member Functions
	__construct ($stream, StreamOptions $options=null)
	Stream constructor. More...
	close ()
	detach ()
	getSize ()
	tell ()
	eof ()
	isSeekable ()
	seek ($offset, $whence=SEEK_SET)
	rewind ()
	isWritable ()
	write ($string)
	isReadable ()
	read ($length)
	getContents ()
	getMetadata ($key=null)
	__toString ()
	__destruct ()

Data Fields
const	MASK_ACCESS_READ = 01
const	MASK_ACCESS_WRITE = 02
const	MASK_ACCESS_READ_WRITE = 03

Private Member Functions
	assertStreamAttached ()
	Checks if the stream is attached to the wrapper. More...

Private Attributes
static array bool	$readable
bool	$writeable
bool	$seekable
	$stream
int	$size = null
string	$uri = null
array	$customMetadata

Static Private Attributes
static array	$accessMap

Detailed Description

Class Stream.

Author

Nicolas Schäfli ns@st.nosp@m.uder.nosp@m.-raim.nosp@m.ann..nosp@m.ch

Since

5.3

Version

1.0.0

Definition at line 32 of file Stream.php.

Constructor & Destructor Documentation

__construct()

ILIAS\Filesystem\Stream\Stream::__construct	(		$stream,
		StreamOptions	$options = null
	)

Stream constructor.

Parameters

resource	$stream	The resource which should be wrapped by the Stream.
StreamOptions	$options	The additional options which are accessible via getMetadata

Definition at line 82 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\$stream, and ILIAS\Filesystem\Stream\Stream\getMetadata().

    {
        if (!is_resource($stream)) {
            throw new \InvalidArgumentException('Stream must be a valid resource but "' . gettype($stream) . '" was given.');
        }

        if ($options !== null) {
            $this->customMetadata = $options->getMetadata();
            $this->size = ($options->getSize() !== -1) ? $options->getSize() : null;
        } else {
            $this->customMetadata = [];
        }

        $this->stream = $stream;

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

        $this->readable = array_key_exists($mode, self::$accessMap) && boolval(self::$accessMap[$mode] & self::MASK_ACCESS_READ);
        $this->writeable = array_key_exists($mode, self::$accessMap) && boolval(self::$accessMap[$mode] & self::MASK_ACCESS_WRITE);
        $this->seekable = boolval($meta['seekable']);
        $this->uri = $this->getMetadata('uri');
    }

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__destruct()

ILIAS\Filesystem\Stream\Stream::__destruct

(

)

Definition at line 363 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\close().

    {

        //cleanup the resource on object destruction if the stream is not detached.
        if (!is_null($this->stream)) {
            $this->close();
        }
    }

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Member Function Documentation

__toString()

ILIAS\Filesystem\Stream\Stream::__toString

(

)

Definition at line 348 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\getContents(), and ILIAS\Filesystem\Stream\Stream\rewind().

    {
        try {
            $this->rewind();
            return strval($this->getContents());
        } catch (\Exception $ex) {
            //to string must not throw an error.
            return '';
        }
    }

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assertStreamAttached()

ILIAS\Filesystem\Stream\Stream::assertStreamAttached ( )

private

Checks if the stream is attached to the wrapper.

An exception if thrown if the stream is already detached.

Exceptions

Definition at line 379 of file Stream.php.

Referenced by ILIAS\Filesystem\Stream\Stream\eof(), ILIAS\Filesystem\Stream\Stream\getContents(), ILIAS\Filesystem\Stream\Stream\read(), ILIAS\Filesystem\Stream\Stream\seek(), ILIAS\Filesystem\Stream\Stream\tell(), and ILIAS\Filesystem\Stream\Stream\write().

                                           : void
    {
        if ($this->stream === null) {
            throw new \RuntimeException('Stream is detached');
        }
    }

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close()

ILIAS\Filesystem\Stream\Stream::close

(

)

Definition at line 110 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\detach(), and ILIAS\Filesystem\Util\PHPStreamFunctions\fclose().

Referenced by ILIAS\Filesystem\Stream\Stream\__destruct().

                           : void
    {
        if (is_resource($this->stream)) {
            PHPStreamFunctions::fclose($this->stream);
        }

        $this->detach();
    }

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detach()

ILIAS\Filesystem\Stream\Stream::detach

(

)

Definition at line 123 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\$stream.

Referenced by ILIAS\Filesystem\Stream\Stream\close(), and ILIAS\Filesystem\Stream\Streams\ofPsr7Stream().

    {
        $stream = $this->stream;
        $this->stream = $this->size = $this->uri = null;

        return $stream;
    }

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eof()

ILIAS\Filesystem\Stream\Stream::eof

(

)

Definition at line 183 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\assertStreamAttached().

                         : bool
    {
        $this->assertStreamAttached();

        return feof($this->stream);
    }

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getContents()

ILIAS\Filesystem\Stream\Stream::getContents

(

)

Definition at line 298 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\assertStreamAttached(), and ILIAS\Filesystem\Util\PHPStreamFunctions\stream_get_contents().

Referenced by ILIAS\Filesystem\Stream\Stream\__toString().

    {
        $this->assertStreamAttached();

        $content = PHPStreamFunctions::stream_get_contents($this->stream);

        if ($content === false) {
            throw new \RuntimeException('Unable to read stream contents');
        }

        return $content;
    }

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getMetadata()

ILIAS\Filesystem\Stream\Stream::getMetadata

(

$key = null

)

Definition at line 315 of file Stream.php.

References ILIAS\LTI\ToolProvider\$key.

Referenced by ILIAS\Filesystem\Stream\Stream\__construct().

    {

        //return empty array if stream is detached
        if ($this->stream === null) {
            return [];
        }

        //return merged metadata if key is missing
        if ($key === null) {
            return array_merge(stream_get_meta_data($this->stream), $this->customMetadata);
        }

        //return value if key was provided

        //try fetch data from custom metadata
        if (array_key_exists($key, $this->customMetadata)) {
            return $this->customMetadata[$key];
        }

        //try to fetch data from php resource metadata
        $meta = stream_get_meta_data($this->stream);
        if (array_key_exists($key, $meta)) {
            return $meta[$key];
        }

        //the key was not found in standard and custom metadata.
        return null;
    }

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getSize()

ILIAS\Filesystem\Stream\Stream::getSize

(

)

Definition at line 135 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\$size.

                             : ?int
    {
        //check if we know the size
        if ($this->size !== null) {
            return $this->size;
        }

        //check if stream is detached
        if ($this->stream === null) {
            return null;
        }

        //clear stat cache if we got a uri (indicates that we have a file resource)
        if ($this->uri !== null) {
            clearstatcache(true, $this->uri);
        }

        $stats = fstat($this->stream);
        if (array_key_exists('size', $stats)) {
            $this->size = $stats['size'];
            return $this->size;
        }

        //unable to determine stream size
        return null;
    }

isReadable()

ILIAS\Filesystem\Stream\Stream::isReadable

(

)

Definition at line 261 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\$readable.

Referenced by ILIAS\Filesystem\Stream\Stream\read().

                                : bool
    {
        return $this->readable;
    }

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isSeekable()

ILIAS\Filesystem\Stream\Stream::isSeekable

(

)

Definition at line 194 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\$seekable.

Referenced by ILIAS\Filesystem\Stream\Stream\seek().

                                : bool
    {
        return $this->seekable;
    }

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isWritable()

ILIAS\Filesystem\Stream\Stream::isWritable

(

)

Definition at line 229 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\$writeable.

Referenced by ILIAS\Filesystem\Stream\Stream\write().

                                : bool
    {
        return $this->writeable;
    }

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read()

ILIAS\Filesystem\Stream\Stream::read

(

$length

)

Definition at line 270 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\assertStreamAttached(), ILIAS\Filesystem\Util\PHPStreamFunctions\fread(), and ILIAS\Filesystem\Stream\Stream\isReadable().

Referenced by ILIAS\ResourceStorage\Consumer\StreamAccess\TokenStream\getMimeType().

    {
        $this->assertStreamAttached();

        if (!$this->isReadable()) {
            throw new \RuntimeException('Can not read from non-readable stream');
        }

        if ($length < 0) {
            throw new \RuntimeException('Length parameter must not be negative');
        }

        if ($length === 0) {
            return '';
        }

        $junk = PHPStreamFunctions::fread($this->stream, $length);
        if ($junk === false) {
            throw new \RuntimeException('Unable to read from stream');
        }

        return $junk;
    }

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rewind()

ILIAS\Filesystem\Stream\Stream::rewind

(

)

Definition at line 220 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\seek().

Referenced by ILIAS\Filesystem\Stream\Stream\__toString(), and ILIAS\ResourceStorage\Consumer\StreamAccess\TokenStream\getMimeType().

                            : void
    {
        $this->seek(0);
    }

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seek()

ILIAS\Filesystem\Stream\Stream::seek	(		$offset,
			$whence = SEEK_SET
	)

Definition at line 203 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\assertStreamAttached(), ILIAS\Filesystem\Util\PHPStreamFunctions\fseek(), and ILIAS\Filesystem\Stream\Stream\isSeekable().

Referenced by ILIAS\Filesystem\Stream\Stream\rewind().

                                                     : void
    {
        $this->assertStreamAttached();

        if (!$this->isSeekable()) {
            throw new \RuntimeException('Stream is not seekable');
        }

        if (PHPStreamFunctions::fseek($this->stream, $offset, $whence) === -1) {
            throw new \RuntimeException("Unable to seek to stream position \"$offset\" with whence \"$whence\"");
        }
    }

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tell()

ILIAS\Filesystem\Stream\Stream::tell

(

)

Definition at line 166 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\assertStreamAttached(), and ILIAS\Filesystem\Util\PHPStreamFunctions\ftell().

    {
        $this->assertStreamAttached();

        $result = PHPStreamFunctions::ftell($this->stream);

        if ($result === false) {
            throw new \RuntimeException('Unable to determine stream position');
        }

        return $result;
    }

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write()

ILIAS\Filesystem\Stream\Stream::write

(

$string

)

Definition at line 238 of file Stream.php.

References ILIAS\Filesystem\Stream\Stream\assertStreamAttached(), ILIAS\Filesystem\Util\PHPStreamFunctions\fwrite(), and ILIAS\Filesystem\Stream\Stream\isWritable().

    {
        $this->assertStreamAttached();

        if (!$this->isWritable()) {
            throw new \RuntimeException('Can not write to a non-writable stream');
        }

        //we can't know the new size
        $this->size = null;
        $result = PHPStreamFunctions::fwrite($this->stream, $string);

        if ($result === false) {
            throw new \RuntimeException('Unable to write to stream');
        }

        return $result;
    }

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Field Documentation

$accessMap

array ILIAS\Filesystem\Stream\Stream::$accessMap

staticprivate

Initial value:

= [
        'r' => self::MASK_ACCESS_READ

Definition at line 38 of file Stream.php.

$customMetadata

array ILIAS\Filesystem\Stream\Stream::$customMetadata

private

Definition at line 73 of file Stream.php.

$readable

array bool ILIAS\Filesystem\Stream\Stream::$readable

private

Initial value:

=> self::MASK_ACCESS_READ_WRITE,
        'r+' => self::MASK_ACCESS_READ_WRITE,
        'x+' => self::MASK_ACCESS_READ_WRITE,
        'c+' => self::MASK_ACCESS_READ_WRITE,
        'rb' => self::MASK_ACCESS_READ,
        'w+b' => self::MASK_ACCESS_READ_WRITE,
        'r+b' => self::MASK_ACCESS_READ_WRITE,
        'x+b' => self::MASK_ACCESS_READ_WRITE,
        'c+b' => self::MASK_ACCESS_READ_WRITE,
        'rt' => self::MASK_ACCESS_READ,
        'w+t' => self::MASK_ACCESS_READ_WRITE,
        'r+t' => self::MASK_ACCESS_READ_WRITE,
        'x+t' => self::MASK_ACCESS_READ_WRITE,
        'c+t' => self::MASK_ACCESS_READ_WRITE,
        'a+' => self::MASK_ACCESS_READ_WRITE,
        'w' => self::MASK_ACCESS_WRITE,
        'rw' => self::MASK_ACCESS_WRITE,
        'wb' => self::MASK_ACCESS_WRITE,
        'a' => self::MASK_ACCESS_WRITE
    ]

Definition at line 40 of file Stream.php.

Referenced by ILIAS\Filesystem\Stream\Stream\isReadable().

$seekable

bool ILIAS\Filesystem\Stream\Stream::$seekable

private

Definition at line 63 of file Stream.php.

Referenced by ILIAS\Filesystem\Stream\Stream\isSeekable().

$size

int ILIAS\Filesystem\Stream\Stream::$size = null

private

Definition at line 68 of file Stream.php.

Referenced by ILIAS\Filesystem\Stream\Stream\getSize().

$stream

resource ILIAS\Filesystem\Stream\Stream::$stream

private

Definition at line 67 of file Stream.php.

Referenced by ILIAS\Filesystem\Stream\Stream\__construct(), and ILIAS\Filesystem\Stream\Stream\detach().

$uri

string ILIAS\Filesystem\Stream\Stream::$uri = null

private

Definition at line 69 of file Stream.php.

$writeable

bool ILIAS\Filesystem\Stream\Stream::$writeable

private

Definition at line 62 of file Stream.php.

Referenced by ILIAS\Filesystem\Stream\Stream\isWritable().

MASK_ACCESS_READ

const ILIAS\Filesystem\Stream\Stream::MASK_ACCESS_READ = 01

Definition at line 34 of file Stream.php.

MASK_ACCESS_READ_WRITE

const ILIAS\Filesystem\Stream\Stream::MASK_ACCESS_READ_WRITE = 03

Definition at line 36 of file Stream.php.

MASK_ACCESS_WRITE

const ILIAS\Filesystem\Stream\Stream::MASK_ACCESS_WRITE = 02

Definition at line 35 of file Stream.php.

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The documentation for this class was generated from the following file:

• src/Filesystem/Stream/Stream.php