Class yii\mongodb\file\Download

All Classes | Properties | Methods

Inheritance	yii\mongodb\file\Download » yii\base\BaseObject
Implements	yii\base\Configurable
Available since version	2.1
Source Code	https://github.com/yiisoft/yii2-mongodb/blob/master/file/Download.php

Download represents the GridFS download operation.

A Download object is usually created by calling yii\mongodb\file\Collection::get() or yii\mongodb\file\Collection::createDownload().

Usage example:

Yii::$app->mongodb->getFileCollection()->createDownload($document['_id'])->toFile('/path/to/file.dat');

You can use Download::substr() to read a specific part of the file:

$filePart = Yii::$app->mongodb->getFileCollection()->createDownload($document['_id'])->substr(256, 1024);

Public Properties

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Property	Type	Description	Defined By
$collection	yii\mongodb\file\Collection	File collection to be used.	yii\mongodb\file\Download

Public Methods

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Method	Description	Defined By
__call()	Calls the named method which is not a class method.	yii\base\BaseObject
__construct()	Constructor.	yii\base\BaseObject
__get()	Returns the value of an object property.	yii\base\BaseObject
__isset()	Checks if a property is set, i.e. defined and not null.	yii\base\BaseObject
__set()	Sets value of an object property.	yii\base\BaseObject
__unset()	Sets an object property to null.	yii\base\BaseObject
canGetProperty()	Returns a value indicating whether a property can be read.	yii\base\BaseObject
canSetProperty()	Returns a value indicating whether a property can be set.	yii\base\BaseObject
className()	Returns the fully qualified name of this class.	yii\base\BaseObject
getBytes()	Alias of toString() method.	yii\mongodb\file\Download
getChunkCursor()	Returns file chunks read cursor.	yii\mongodb\file\Download
getChunkIterator()	Returns iterator for the file chunks cursor.	yii\mongodb\file\Download
getDocument()		yii\mongodb\file\Download
getFilename()	Returns associated file's filename.	yii\mongodb\file\Download
getResource()	Returns persistent stream resource, which can be used to read file.	yii\mongodb\file\Download
getSize()	Returns the size of the associated file.	yii\mongodb\file\Download
hasMethod()	Returns a value indicating whether a method is defined.	yii\base\BaseObject
hasProperty()	Returns a value indicating whether a property is defined.	yii\base\BaseObject
init()	Initializes the object.	yii\base\BaseObject
setDocument()	Sets data of the document to be downloaded.	yii\mongodb\file\Download
substr()	Return part of a file.	yii\mongodb\file\Download
toFile()	Saves download to the physical file.	yii\mongodb\file\Download
toResource()	Returns an opened stream resource, which can be used to read file.	yii\mongodb\file\Download
toStream()	Saves file into the given stream.	yii\mongodb\file\Download
toString()	Returns a string of the bytes in the associated file.	yii\mongodb\file\Download
write()	Alias of toFile() method.	yii\mongodb\file\Download

Property Details

$collection public property

File collection to be used.

public yii\mongodb\file\Collection $collection = null

Method Details

getBytes() public method

Alias of toString() method.

public string getBytes ( )
return	string	File content.

getChunkCursor() public method

Returns file chunks read cursor.

public \MongoDB\Driver\Cursor getChunkCursor ( $refresh = false )
$refresh	boolean	Whether to recreate cursor, if it is already exist.
return	\MongoDB\Driver\Cursor	Chuck list cursor.
throws	yii\base\InvalidConfigException

getChunkIterator() public method

Returns iterator for the file chunks cursor.

public Iterator getChunkIterator ( $refresh = false )
$refresh	boolean	Whether to recreate iterator, if it is already exist.
return	Iterator	Chuck cursor iterator.

getDocument() public method

public array getDocument ( )
return	array	Document to be downloaded.
throws	yii\base\InvalidConfigException	on invalid document configuration.

getFilename() public method

Returns associated file's filename.

public string\|null getFilename ( )
return	string\|null	File name.

getResource() public method

Returns persistent stream resource, which can be used to read file.

public resource getResource ( )
return	resource	File stream resource.

getSize() public method

Returns the size of the associated file.

public integer getSize ( )
return	integer	File size.

setDocument() public method

Sets data of the document to be downloaded.

Document can be specified by its ID, in this case its data will be fetched automatically via extra query.

public void setDocument ( $document )
$document	array\|\MongoDB\BSON\ObjectID	Document raw data or document ID.

substr() public method

Return part of a file.

public string\|false substr ( $start, $length )
$start	integer	Reading start position. If non-negative, the returned string will start at the start'th position in file, counting from zero. If negative, the returned string will start at the start'th character from the end of file.
$length	integer	Number of bytes to read. If given and is positive, the string returned will contain at most length characters beginning from start (depending on the length of file). If given and is negative, then that many characters will be omitted from the end of file (after the start position has been calculated when a start is negative).
return	string\|false	The extracted part of file or `false` on failure

toFile() public method

Saves download to the physical file.

public integer toFile ( $filename )
$filename	string	Name of the physical file.
return	integer	Number of written bytes.

toResource() public method

Returns an opened stream resource, which can be used to read file.

Note: each invocation of this method will create new file resource.

public resource toResource ( )
return	resource	Stream resource.

toStream() public method

Saves file into the given stream.

public integer toStream ( $stream )
$stream	resource	Stream, which file should be saved to.
return	integer	Number of written bytes.

toString() public method

Returns a string of the bytes in the associated file.

public string toString ( )
return	string	File content.

write() public method

Alias of toFile() method.

public integer write ( $filename )
$filename	string	Name of the physical file.
return	integer	Number of written bytes.