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<?php /** * @package FrameworkOnFramework * @subpackage dispatcher * @copyright Copyright (C) 2010 - 2015 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved. * @license GNU General Public License version 2 or later; see LICENSE.txt */ // Protect from unauthorized access defined('FOF_INCLUDED') or die; interface FOFDownloadInterface { /** * Does this download adapter support downloading files in chunks? * * @return boolean True if chunk download is supported */ public function supportsChunkDownload(); /** * Does this download adapter support reading the size of a remote file? * * @return boolean True if remote file size determination is supported */ public function supportsFileSize(); /** * Is this download class supported in the current server environment? * * @return boolean True if this server environment supports this download class */ public function isSupported(); /** * Get the priority of this adapter. If multiple download adapters are * supported on a site, the one with the highest priority will be * used. * * @return boolean */ public function getPriority(); /** * Returns the name of this download adapter in use * * @return string */ public function getName(); /** * Download a part (or the whole) of a remote URL and return the downloaded * data. You are supposed to check the size of the returned data. If it's * smaller than what you expected you've reached end of file. If it's empty * you have tried reading past EOF. If it's larger than what you expected * the server doesn't support chunk downloads. * * If this class' supportsChunkDownload returns false you should assume * that the $from and $to parameters will be ignored. * * @param string $url The remote file's URL * @param integer $from Byte range to start downloading from. Use null for start of file. * @param integer $to Byte range to stop downloading. Use null to download the entire file ($from is ignored) * @param array $params Additional params that will be added before performing the download * * @return string The raw file data retrieved from the remote URL. * * @throws Exception A generic exception is thrown on error */ public function downloadAndReturn($url, $from = null, $to = null, array $params = array()); /** * Get the size of a remote file in bytes * * @param string $url The remote file's URL * * @return integer The file size, or -1 if the remote server doesn't support this feature */ public function getFileSize($url); }