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 ()
	@inheritDoc More...

	detach ()
	@inheritDoc More...

	getSize ()
	@inheritDoc More...

	tell ()
	@inheritDoc More...

	eof ()
	@inheritDoc More...

	isSeekable ()
	@inheritDoc More...

	seek ($offset, $whence=SEEK_SET)
	@inheritDoc More...

	rewind ()
	@inheritDoc More...

	isWritable ()
	@inheritDoc More...

	write ($string)
	@inheritDoc More...

	isReadable ()
	@inheritDoc More...

	read ($length)
	@inheritDoc More...

	getContents ()
	@inheritDoc More...

	getMetadata ($key=null)
	@inheritDoc More...

	__toString ()
	@inheritDoc More...

	__destruct ()
	@inheritDoc More...

Data Fields
const	MASK_ACCESS_READ = 01

const	MASK_ACCESS_WRITE = 02

const	MASK_ACCESS_READ_WRITE = 03

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

Protected Attributes
string	$_mode = null

bool	$readable

bool	$writeable

bool	$seekable

	$stream

int	$size = null

string	$uri = null

array	$customMetadata

Static Protected Attributes
static array	$accessMap

Detailed Description

Author: Nicolas Schäfli ns@st.nosp@m.uder.nosp@m.-raim.nosp@m.ann..nosp@m.ch; Fabian Schmid fabia.nosp@m.n@sr.nosp@m..solu.nosp@m.tion.nosp@m.s

Definition at line 29 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 \| null	$options	The additional options which are accessible via getMetadata

Definition at line 79 of file Stream.php.

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

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

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◆ __destruct()

ILIAS\Filesystem\Stream\Stream::__destruct ( )

@inheritDoc

Definition at line 352 of file Stream.php.

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

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

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Member Function Documentation

◆ __toString()

ILIAS\Filesystem\Stream\Stream::__toString ( )

@inheritDoc

Definition at line 338 of file Stream.php.

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

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

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◆ assertStreamAttached()

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

protected

Checks if the stream is attached to the wrapper.

An exception if thrown if the stream is already detached.

Exceptions

RuntimeException Thrown if the stream is already detached.

Reimplemented in ILIAS\Filesystem\Stream\ReattachableStream.

Definition at line 366 of file Stream.php.

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

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().

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◆ close()

ILIAS\Filesystem\Stream\Stream::close ( )

@inheritDoc

Definition at line 114 of file Stream.php.

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

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

Referenced by ILIAS\Filesystem\Stream\Stream\__destruct(), and ILIAS\Repository\IRSS\IRSSWrapper\hasContainerEntry().

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◆ detach()

ILIAS\Filesystem\Stream\Stream::detach ( )

@inheritDoc

Definition at line 126 of file Stream.php.

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

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

Referenced by ILIAS\Filesystem\Stream\Stream\close(), ILIAS\Filesystem\Stream\Streams\ofPsr7Stream(), ILIAS\ResourceStorage\Flavour\Machine\DefaultMachines\Extract\General\readImage(), and ILIAS\ResourceStorage\Flavour\Machine\DefaultMachines\Extract\PDF\readImage().

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◆ eof()

ILIAS\Filesystem\Stream\Stream::eof ( )

@inheritDoc

Definition at line 183 of file Stream.php.

                         : bool
    {
        $this->assertStreamAttached();
 
        return feof($this->stream);
    }

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

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◆ getContents()

ILIAS\Filesystem\Stream\Stream::getContents ( )

@inheritDoc

Definition at line 290 of file Stream.php.

                                 : string
    {
        $this->assertStreamAttached();
 
        $content = PHPStreamFunctions::stream_get_contents($this->stream);
 
        if ($content === false) {
            throw new \RuntimeException('Unable to read stream contents');
        }
 
        return $content;
    }

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

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

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◆ getMetadata()

ILIAS\Filesystem\Stream\Stream::getMetadata ( $key = null )

@inheritDoc

Definition at line 306 of file Stream.php.

    {
        //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;
    }

Referenced by ILIAS\Filesystem\Stream\Stream\__construct(), ILIAS\Repository\IRSS\IRSSWrapper\getResourcePath(), ILIAS\ResourceStorage\Flavour\Machine\DefaultMachines\Extract\PDF\readImage(), and ILIAS\ResourceStorage\Flavour\Machine\DefaultMachines\Extract\Video\readImage().

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◆ getSize()

ILIAS\Filesystem\Stream\Stream::getSize ( )

@inheritDoc

Definition at line 137 of file Stream.php.

                             : ?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;
    }

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

◆ isReadable()

ILIAS\Filesystem\Stream\Stream::isReadable ( )

@inheritDoc

Definition at line 255 of file Stream.php.

                                : bool
    {
        return $this->readable;
    }

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

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

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◆ isSeekable()

ILIAS\Filesystem\Stream\Stream::isSeekable ( )

@inheritDoc

Definition at line 193 of file Stream.php.

                                : bool
    {
        return $this->seekable;
    }

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

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

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◆ isWritable()

ILIAS\Filesystem\Stream\Stream::isWritable ( )

@inheritDoc

Definition at line 225 of file Stream.php.

                                : bool
    {
        return $this->writeable;
    }

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

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

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◆ read()

ILIAS\Filesystem\Stream\Stream::read ( $length )

@inheritDoc

Definition at line 263 of file Stream.php.

                                 : string
    {
        $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;
    }

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

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◆ rewind()

ILIAS\Filesystem\Stream\Stream::rewind ( )

@inheritDoc

Definition at line 217 of file Stream.php.

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

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

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

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◆ seek()

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

@inheritDoc

Reimplemented in ILIAS\Filesystem\Stream\ZIPStream.

Definition at line 201 of file Stream.php.

                                                     : 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\"");
        }
    }

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

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

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◆ tell()

ILIAS\Filesystem\Stream\Stream::tell ( )

@inheritDoc

Definition at line 167 of file Stream.php.

                          : int
    {
        $this->assertStreamAttached();
 
        $result = PHPStreamFunctions::ftell($this->stream);
 
        if ($result === false) {
            throw new \RuntimeException('Unable to determine stream position');
        }
 
        return $result;
    }

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

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◆ write()

ILIAS\Filesystem\Stream\Stream::write ( $string )

@inheritDoc

Definition at line 233 of file Stream.php.

                                  : int
    {
        $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;
    }

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

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Field Documentation

◆ $_mode

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

protected

Definition at line 57 of file Stream.php.

◆ $accessMap

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

staticprotected

Initial value:

= [
        'r' => self::MASK_ACCESS_READ,
        'w+' => 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 35 of file Stream.php.

◆ $customMetadata

string[] ILIAS\Filesystem\Stream\Stream::$customMetadata

protected

Definition at line 71 of file Stream.php.

◆ $readable

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

protected

Definition at line 59 of file Stream.php.

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

◆ $seekable

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

protected

Definition at line 61 of file Stream.php.

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

◆ $size

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

protected

Definition at line 66 of file Stream.php.

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

◆ $stream

null ILIAS\Filesystem\Stream\Stream::$stream

protected

Definition at line 65 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

protected

Definition at line 67 of file Stream.php.

◆ $writeable

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

protected

Definition at line 60 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 31 of file Stream.php.

◆ MASK_ACCESS_READ_WRITE

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

Definition at line 33 of file Stream.php.

◆ MASK_ACCESS_WRITE

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

Definition at line 32 of file Stream.php.

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

components/ILIAS/Filesystem/src/Stream/Stream.php

Public Member Functions

Data Fields

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ __construct()

◆ __destruct()

Member Function Documentation

◆ __toString()

◆ assertStreamAttached()

◆ close()

◆ detach()

◆ eof()

◆ getContents()

◆ getMetadata()

◆ getSize()

◆ isReadable()

◆ isSeekable()

◆ isWritable()

◆ read()

◆ rewind()

◆ seek()

◆ tell()

◆ write()

Field Documentation

◆ $_mode

◆ $accessMap

◆ $customMetadata

◆ $readable

◆ $seekable

◆ $size

◆ $stream

◆ $uri

◆ $writeable

◆ MASK_ACCESS_READ

◆ MASK_ACCESS_READ_WRITE

◆ MASK_ACCESS_WRITE