123 lines
3.1 KiB
PHP
123 lines
3.1 KiB
PHP
<?php
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/**
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* @package FrameworkOnFramework
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* @subpackage dispatcher
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* @copyright Copyright (C) 2010-2016 Nicholas K. Dionysopoulos / Akeeba Ltd. All rights reserved.
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* @license GNU General Public License version 2 or later; see LICENSE.txt
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*/
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// Protect from unauthorized access
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defined('F0F_INCLUDED') or die;
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/**
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* A download adapter using URL fopen() wrappers
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*/
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class F0FDownloadAdapterFopen extends F0FDownloadAdapterAbstract implements F0FDownloadInterface
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{
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public function __construct()
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{
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$this->priority = 100;
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$this->supportsFileSize = false;
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$this->supportsChunkDownload = true;
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$this->name = 'fopen';
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// If we are not allowed to use ini_get, we assume that URL fopen is
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// disabled.
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if (!function_exists('ini_get'))
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{
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$this->isSupported = false;
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}
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else
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{
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$this->isSupported = ini_get('allow_url_fopen');
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}
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}
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/**
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* Download a part (or the whole) of a remote URL and return the downloaded
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* data. You are supposed to check the size of the returned data. If it's
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* smaller than what you expected you've reached end of file. If it's empty
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* you have tried reading past EOF. If it's larger than what you expected
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* the server doesn't support chunk downloads.
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*
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* If this class' supportsChunkDownload returns false you should assume
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* that the $from and $to parameters will be ignored.
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*
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* @param string $url The remote file's URL
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* @param integer $from Byte range to start downloading from. Use null for start of file.
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* @param integer $to Byte range to stop downloading. Use null to download the entire file ($from is ignored)
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* @param array $params Additional params that will be added before performing the download
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*
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* @return string The raw file data retrieved from the remote URL.
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*
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* @throws Exception A generic exception is thrown on error
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*/
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public function downloadAndReturn($url, $from = null, $to = null, array $params = array())
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{
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if (empty($from))
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{
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$from = 0;
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}
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if (empty($to))
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{
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$to = 0;
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}
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if ($to < $from)
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{
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$temp = $to;
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$to = $from;
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$from = $temp;
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unset($temp);
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}
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if (!(empty($from) && empty($to)))
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{
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$options = array(
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'http' => array(
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'method' => 'GET',
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'header' => "Range: bytes=$from-$to\r\n"
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),
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'ssl' => array(
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'verify_peer' => true,
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'cafile' => __DIR__ . '/cacert.pem',
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'verify_depth' => 5,
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)
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);
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$options = array_merge($options, $params);
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$context = stream_context_create($options);
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$result = @file_get_contents($url, false, $context, $from - $to + 1);
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}
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else
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{
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$options = array(
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'http' => array(
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'method' => 'GET',
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),
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'ssl' => array(
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'verify_peer' => true,
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'cafile' => __DIR__ . '/cacert.pem',
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'verify_depth' => 5,
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)
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);
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$options = array_merge($options, $params);
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$context = stream_context_create($options);
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$result = @file_get_contents($url, false, $context);
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}
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if ($result === false)
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{
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$error = JText::sprintf('LIB_FOF_DOWNLOAD_ERR_HTTPERROR');
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throw new Exception($error, 1);
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}
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else
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{
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return $result;
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}
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}
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} |