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<?php
/**
* webtrees: online genealogy
* Copyright (C) 2015 webtrees development team
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
namespace Fisharebest\Webtrees;
/**
* File manipulation utilities.
*/
class File {
/**
* Fetch a remote file
* Note that fopen() and file_get_contents() are often unvailable, as they
* can easily be exploited by application bugs, and are therefore disabled.
* Hence we use fsockopen().
* To allow arbitrarily large downloads with small memory limits, we either
* write output to a stream or return it.
*
* @param string $url
* @param resource|null $stream
*
* @return null|string
*/
public static function fetchUrl($url, $stream = null) {
$host = parse_url($url, PHP_URL_HOST);
$port = parse_url($url, PHP_URL_PORT);
$path = parse_url($url, PHP_URL_PATH);
$query = parse_url($url, PHP_URL_QUERY);
if (!$port) {
$port = parse_url($url, PHP_URL_SCHEME) === 'https' ? 443 : 80;
}
$scheme = $port === 443 ? 'ssl://' : '';
try {
$fp = fsockopen($scheme . $host, $port, $errno, $errstr, 5);
fputs($fp, "GET $path?$query HTTP/1.0\r\nHost: $host\r\nConnection: Close\r\n\r\n");
// The first part of the response include the HTTP headers
$response = fread($fp, 65536);
// The file has moved? Follow it.
if (preg_match('/^HTTP\/1.[01] 30[123].+\nLocation: ([^\r\n]+)/s', $response, $match)) {
fclose($fp);
return self::fetchUrl($match[1], $stream);
} else {
// The response includes headers, a blank line, then the content
$response = substr($response, strpos($response, "\r\n\r\n") + 4);
}
if ($stream) {
fwrite($stream, $response);
while ($tmp = fread($fp, 8192)) {
fwrite($stream, $tmp);
}
fclose($fp);
return null;
} else {
while ($tmp = fread($fp, 8192)) {
$response .= $tmp;
}
fclose($fp);
return $response;
}
} catch (\ErrorException $ex) {
return null;
}
}
/**
* Recursively delete a folder or file
*
* @param string $path
*
* @return bool Was the file deleted
*/
public static function delete($path) {
if (is_dir($path)) {
$dir = opendir($path);
while ($dir !== false && (($file = readdir($dir)) !== false)) {
if ($file !== '.' && $file !== '..') {
self::delete($path . DIRECTORY_SEPARATOR . $file);
}
}
closedir($dir);
try {
rmdir($path);
} catch (\ErrorException $ex) {
// Continue, in case there are other files/folders that we can delete.
}
} else {
try {
unlink($path);
} catch (\ErrorException $ex) {
// Continue, in case there are other files/folders that we can delete.
}
}
return !file_exists($path);
}
/**
* Create a folder, and sub-folders, if it does not already exist
*
* @param string $path
*
* @return bool Does the folder now exist
*/
public static function mkdir($path) {
if (is_dir($path)) {
return true;
} else {
if (dirname($path) && !is_dir(dirname($path))) {
self::mkdir(dirname($path));
}
try {
mkdir($path);
return true;
} catch (\ErrorException $ex) {
return false;
}
}
}
}
|
