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292 lines
7.8 KiB
292 lines
7.8 KiB
5 years ago
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<?php
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if (!defined('__TYPECHO_ROOT_DIR__')) exit;
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/**
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* Typecho Blog Platform
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*
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* @copyright Copyright (c) 2008 Typecho team (http://www.typecho.org)
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* @license GNU General Public License 2.0
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*/
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/**
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* 备份工具
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*
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* @package Widget
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*/
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class Widget_Backup extends Widget_Abstract_Options implements Widget_Interface_Do
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{
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const HEADER = '%TYPECHO_BACKUP_FILE%';
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/**
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* @var array
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*/
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private $_types = array(
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'contents' => 1,
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'comments' => 2,
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'metas' => 3,
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'relationships' => 4,
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'users' => 5,
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'fields' => 6
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);
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/**
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* @var array
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*/
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private $_cleared = array();
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/**
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* @var bool
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*/
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private $_login = false;
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/**
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* @param $type
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* @param $data
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* @return string
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*/
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private function buildBuffer($type, $data)
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{
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$body = '';
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$schema = array();
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foreach ($data as $key => $val) {
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$schema[$key] = NULL === $val ? NULL : strlen($val);
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$body .= $val;
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}
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$header = Json::encode($schema);
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return Typecho_Common::buildBackupBuffer($type, $header, $body);
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}
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/**
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* 解析数据
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*
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* @param $file
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*/
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private function extractData($file)
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{
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$fp = @fopen($file, 'rb');
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if (!$fp) {
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$this->widget('Widget_Notice')->set(_t('无法读取备份文件'), 'error');
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$this->response->goBack();
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}
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$fileSize = filesize($file);
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$headerSize = strlen(self::HEADER);
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if ($fileSize < $headerSize) {
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@fclose($fp);
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$this->widget('Widget_Notice')->set(_t('备份文件格式错误'), 'error');
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$this->response->goBack();
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}
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$fileHeader = @fread($fp, $headerSize);
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if (!$fileHeader || $fileHeader != self::HEADER) {
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@fclose($fp);
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$this->widget('Widget_Notice')->set(_t('备份文件格式错误'), 'error');
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$this->response->goBack();
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}
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fseek($fp, $fileSize - $headerSize);
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$fileFooter = @fread($fp, $headerSize);
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if (!$fileFooter || $fileFooter != self::HEADER) {
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@fclose($fp);
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$this->widget('Widget_Notice')->set(_t('备份文件格式错误'), 'error');
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$this->response->goBack();
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}
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fseek($fp, $headerSize);
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$offset = $headerSize;
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while (!feof($fp) && $offset + $headerSize < $fileSize) {
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$data = Typecho_Common::extractBackupBuffer($fp, $offset);
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if (!$data) {
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@fclose($fp);
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$this->widget('Widget_Notice')->set(_t('恢复数据出现错误'), 'error');
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$this->response->goBack();
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}
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list ($type, $header, $body) = $data;
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$this->processData($type, $header, $body);
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}
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@fclose($fp);
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$this->widget('Widget_Notice')->set(_t('数据恢复完成'), 'success');
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$this->response->goBack();
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}
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/**
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* @param $type
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* @param $header
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* @param $body
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*/
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private function processData($type, $header, $body)
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{
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$table = array_search($type, $this->_types);
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if (!empty($table)) {
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$schema = Json::decode($header, true);
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$data = array();
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$offset = 0;
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foreach ($schema as $key => $val) {
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$data[$key] = NULL === $val ? NULL : substr($body, $offset, $val);
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$offset += $val;
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}
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$this->importData($table, $data);
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} else {
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Typecho_Plugin::factory(__CLASS__)->import($type, $header, $body);
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}
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}
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/**
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* 导入单条数据
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*
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* @param $table
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* @param $data
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*/
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private function importData($table, $data)
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{
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$db = $this->db;
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try {
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if (empty($this->_cleared[$table])) {
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// 清除数据
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$db->query($db->delete('table.' . $table));
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$this->_cleared[$table] = true;
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}
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if (!$this->_login && 'users' == $table && $data['group'] == 'administrator') {
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// 重新登录
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$this->reLogin($data);
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}
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$db->query($db->insert('table.' . $table)->rows($data));
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} catch (Exception $e) {
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$this->widget('Widget_Notice')->set(_t('恢复过程中遇到如下错误: %s', $e->getMessage()), 'error');
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$this->response->goBack();
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}
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}
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/**
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* 备份过程会重写用户数据
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* 所以需要重新登录当前用户
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*
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* @param $user
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*/
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private function reLogin(&$user)
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{
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if (empty($user['authCode'])) {
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$user['authCode'] = function_exists('openssl_random_pseudo_bytes') ?
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bin2hex(openssl_random_pseudo_bytes(16)) : sha1(Typecho_Common::randString(20));
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}
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$user['activated'] = $this->options->time;
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$user['logged'] = $user['activated'];
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Typecho_Cookie::set('__typecho_uid', $user['uid']);
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Typecho_Cookie::set('__typecho_authCode', Typecho_Common::hash($user['authCode']));
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$this->_login = true;
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}
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/**
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* 导出数据
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*/
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private function export()
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{
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$host = parse_url($this->options->siteUrl, PHP_URL_HOST);
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$this->response->setContentType('application/octet-stream');
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$this->response->setHeader('Content-Disposition', 'attachment; filename="'
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. date('Ymd') . '_' . $host . '_' . uniqid() . '.dat"');
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$buffer = self::HEADER;
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$db = $this->db;
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foreach ($this->_types as $type => $val) {
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$page = 1;
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do {
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$rows = $db->fetchAll($db->select()->from('table.' . $type)->page($page, 20));
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$page ++;
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foreach ($rows as $row) {
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$buffer .= $this->buildBuffer($val, $row);
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if (sizeof($buffer) >= 1024 * 1024) {
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echo $buffer;
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ob_flush();
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$buffer = '';
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}
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}
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} while (count($rows) == 20);
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}
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if (!empty($buffer)) {
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echo $buffer;
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ob_flush();
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}
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Typecho_Plugin::factory(__CLASS__)->export();
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echo self::HEADER;
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ob_end_flush();
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}
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/**
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* 导入数据
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*/
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private function import()
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{
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$path = NULL;
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if (!empty($_FILES)) {
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$file = array_pop($_FILES);
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if (0 == $file['error'] && is_uploaded_file($file['tmp_name'])) {
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$path = $file['tmp_name'];
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} else {
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$this->widget('Widget_Notice')->set(_t('备份文件上传失败'), 'error');
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$this->response->goBack();
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}
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} else {
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if (!$this->request->is('file')) {
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$this->widget('Widget_Notice')->set(_t('没有选择任何备份文件'), 'error');
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$this->response->goBack();
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}
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$path = __TYPECHO_BACKUP_DIR__ . '/' . $this->request->get('file');
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if (!file_exists($path)) {
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$this->widget('Widget_Notice')->set(_t('备份文件不存在'), 'error');
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$this->response->goBack();
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}
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}
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$this->extractData($path);
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}
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/**
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* 列出已有备份文件
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*
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* @return array
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*/
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public function listFiles()
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{
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return array_map('basename', glob(__TYPECHO_BACKUP_DIR__ . '/*.dat'));
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}
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/**
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* 绑定动作
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*/
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public function action()
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{
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$this->user->pass('administrator');
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$this->security->protect();
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$this->on($this->request->is('do=export'))->export();
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$this->on($this->request->is('do=import'))->import();
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}
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}
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