/**
* Downloads the file from remote server to specified location on local server. Uses regular file operations or cURL or sockets (whichever available first) to download the file.
*
* @param url $source_url url of the source file
* @param string $target_folder target folder name, should end with DS
* @param string $target_file target file name.
*/
public static function download_file($source_url, $target_folder, $target_file)
{
if (file_exists($target_file)) {
JFile::delete($target_file);
} else {
JFolder::create($target_folder);
}
//try to connect via fopen
if (function_exists('fopen') && ini_get('allow_url_fopen')) {
//set socket timeout
ini_set('default_socket_timeout', 5);
$handle = fopen($source_url, 'rb');
if ($handle) {
$download = fopen($target_folder . $target_file, "wb");
if ($download) {
while (!feof($handle)) {
fwrite($download, fread($handle, 1024 * 8), 1024 * 8);
}
}
}
if ($handle) {
fclose($handle);
}
} else {
if (function_exists('curl_init') && function_exists('curl_exec')) {
$fh = fopen($target_folder . $target_file, "w");
$options = array(CURLOPT_FILE => $fh, CURLOPT_URL => $source_url, CURLOPT_TIMEOUT => 28800, CURLOPT_FAILONERROR => 1, CURLOPT_HEADER => 0, CURLOPT_TIMEOUT => 5);
$ch = curl_init();
curl_setopt_array($ch, $options);
curl_exec($ch);
curl_close($ch);
fclose($fh);
} else {
if (function_exists('fsockopen') && $data == '') {
$errno = 0;
$errstr = '';
$parts = JString::parse_url($source_url);
$hostname = $parts['host'];
unset($parts['scheme']);
unset($parts['host']);
$filename = CJFunctions::join_url($parts);
//timeout handling: 5s for the socket and 5s for the stream = 10s
$fsock = fsockopen($hostname, 80, $errno, $errstr, 5);
if ($fsock) {
fputs($fsock, 'GET ' . $filename . ' HTTP/1.1\\r\\n');
fputs($fsock, 'HOST: ' . $hostname . '\\r\\n');
fputs($fsock, 'Connection: close\\r\\n\\r\\n');
//force stream timeout...
stream_set_blocking($fsock, 1);
stream_set_timeout($fsock, 5);
$get_info = false;
$download = fopen($target_folder . $target_file, 'wb');
while (!feof($fsock)) {
if ($get_info) {
fwrite($download, fread($handle, 1024 * 8), 1024 * 8);
} else {
if (fgets($fsock, 8192) == '\\r\\n') {
$get_info = true;
}
}
}
fclose($fsock);
}
}
}
}
}
