php-advanced-downloader

php advanced downloader allow you to control file download process with many options and protecting real file paths

License

This Package is distributed under GNU GPL V3 License

Copyright

@author Ahmed Saad a7mad.sa3d.2014@gmail.com

Version

1.2.1

Updated at : 7 Jul 2016

Changelog :

Fix Byte range end ( By chardinge1 )

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Features:

1. Protect Real Files from direct access.
2. Control download resume capability.
3. Control download speed (** requires testing on real host to know minimum safe speed ** ).
4. Control download with authentication, ( WWW Basic Authentication or callback handler ).
5. Support two diffrent modes for download, File mode and Data mode.
6. Change download file name
   • file type extension might also changable only for Downloading in Downloader::DOWNLOAD_DATA mode .
7. Record downloaded bytes total bandwidth in a text file or add more control with a callback handler.
8. Support alot of file mime types.
9. Support Method Chaining.
10. Designed to use namespace and autoload

Note: This Class is supposed to be used in downloading processes, so throwing errors or displaying messages isn't the good idea here, So this class will depends on header status code and status text so if something happens and you want to get information, see response status code and status text.

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Installation:

• just require autoload.php file in your script :

  this autoloader will automatically load any defined class based on its namespace .

    // inside index.php
    require_once( './core/autoload.php' );
  

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Usage:

• Basic file download :

    <?php
    	
    	require_once( './core/autoload.php' );
    	
    	use Core\Downloader;
  
    	$file_path = 'files/my_file.rar';
  
    	( new Downloader( $file_path ) )->download();
  
    ?>
  

• Advanced file download

    <?php
  
    	require_once( './core/autoload.php' );
    	
    	use Core\Downloader;
  
    	( new Downloader( $file_path, Downloader::DOWNLOAD_FILE ) ) // Download file in File mode
    		->setDownloadName( 'new_name' )							// Change download file name
    		->resumable( false ) 									// turn off resumable capability
    		->speedLimit( 200 )										// Limit download speed in kbyte/sec
    		->authenticate( 'login_name', 'login_password' )		// authenticate before downloading
    		->recordDownloaded( true )								// Used bandwith counter
    		->autoExit( true )										// Auto exit after download completed
    		->download();											// Start Download Process
  
    ?>
  

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Documentation

---

• Download Mode

  there are two types of downloading mode:

  Downloader::DOWNLOAD_FILE

  Downloader::DATA

  are defined as the second arguments for Downloader constructor, default one is file mode

  • file mode : Downloader::DOWNLOAD_FILE

    in file mode the downloaded file must be file and exists and readabe, otherwise an header status code 404 for file not found, or 405 for non readable files

    if we change download name file type and extension will not be affected by the new name, only file name will be changed

  • data mode : Downloader::DOWNLOAD_DATA

    data mode can download a file or string or any thing if the downloaded is file it will download it, other wise it will consider that we are downloading a basic txt file, so it will set extension to txt and and give a default filename

    Note :

    • Downloading in data mode will change last modified time to the downloaded time Current download time.

    • to controll downloaded file format, you can use setDownloadName() method then the given extension will be used as file type

    setDownloadName( 'newname.mp4' ) ->download(); // Downloaded file name will be newname.mp3, mp4 will be ignored // Data Mode ( new Downloader( 'files/file.mp3', Downloader::DOWNLOAD_DATA ) ) ->setDownloadName( 'newname.mp4' ) ->download(); // Downloaded file name will be newname.mp4, and couldn't be opened due to wrong extension, So becareful while downloading in data mode ?>

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• Downloader::setDownloadName( string $filename )

  change downloaded file name

  this method behaviour depends also on download mode :

  if new extenstion supplied :

  in file mode ===> only file name will be changed and extension will be ignored .

  in data mode ===> file name and type will be change .

    <?php
  
    	// assuming original file is 'file.mp3'
    	
    	// Download in File Mode
    	$downloader->setDownloadName( 'another_name.avi' ); //  another_name.mp3
  
  
    	// Download in Data Mode
    	$downloader->setDownloadName( 'another_name.avi' ); // another_name.avi
  
  
    	$downloader->setDownloadName( 'another_name' ); // another_name.mp3 ( if file.mp3 exists )
    	 												// another_name.txt ( if file.mp3 doesn't exists )
  
    ?>
  

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• Downloader::resumable( bool $bool )

  turn on or off resume capability

  Downloader Default behaviour is to use resume

    <?php
  
    	
    	
    	$downloader->resumable();  		// turn on
  
    	$downloader->resumable( true ); // turn on
  
    	$downloader->resumable( false ); // Turn off
  
    ?>
  

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• Downloader::speedLimit( int $speed )

  $speed is integer represent downlowd speed in Kilobytes per second

  Note :

  Speed Limiting depends on micro sleep, So, Becarefull while using speed limit, in any value it works very well and almost accurate in local host testing. in real host you should test to know the best safe minimum speed because in some hosts speed limit may cause download corrupt as server may close connection due to script sleeping

  Limited speed is defined for one connection, so while using resume and downloading with download programs such as IDM, there eill be multi connections, every single connection will download with defined speed, so overall speed will be many doubles of defined speed.

    	// Limit speed to 100 kB/s
    	$downloader->speedLimit( 100 );