491 lines
13 KiB
PHP
Executable File
491 lines
13 KiB
PHP
Executable File
<?php
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if (!defined('IN_ECS'))
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{
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die('Hacking attempt');
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}
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/**
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* 对mysql敏感字符串转义
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*
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* @access public
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* @param string $str
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*
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* @return string
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*/
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function dump_escape_string($str)
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{
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return cls_mysql::escape_string($str);
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}
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/**
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* 对mysql记录中的null值进行处理
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*
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* @access public
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* @param string $str
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*
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* @return string
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*/
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function dump_null_string($str)
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{
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if (!isset($str) || is_null($str))
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{
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$str = 'NULL';
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}
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return $str;
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}
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class cls_sql_dump
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{
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var $max_size = 2097152; // 2M
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var $is_short = false;
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var $offset = 300;
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var $dump_sql = '';
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var $sql_num = 0;
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var $error_msg = '';
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var $db;
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/**
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* 类的构造函数
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*
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* @access public
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* @param
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*
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* @return void
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*/
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function __construct(&$db, $max_size =0)
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{
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$this->cls_sql_dump($db, $max_size);
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}
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/**
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* 类的构造函数
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*
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* @access public
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* @param
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*
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* @return void
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*/
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function cls_sql_dump($db, $max_size=0)
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{
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$this->db = $db;
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if ($max_size > 0 )
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{
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$this->max_size = $max_size;
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}
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}
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/**
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* 获取指定表的定义
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*
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* @access public
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* @param string $table 数据表名
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* @param boolen $add_drop 是否加入drop table
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*
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* @return string $sql
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*/
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function get_table_df($table, $add_drop = false)
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{
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if ($add_drop)
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{
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$table_df = "DROP TABLE IF EXISTS `$table`;\r\n";
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}
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else
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{
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$table_df = '';
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}
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$tmp_arr = $this->db->getRow("SHOW CREATE TABLE `$table`");
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$tmp_sql = $tmp_arr['Create Table'];
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$tmp_sql = substr($tmp_sql, 0, strrpos($tmp_sql, ")") + 1); //去除行尾定义。
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if ($this->db->version() >= '4.1')
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{
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$table_df .= $tmp_sql . " ENGINE=MyISAM DEFAULT CHARSET=" . str_replace('-', '', EC_CHARSET) . ";\r\n";
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}
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else
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{
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$table_df .= $tmp_sql . " TYPE=MyISAM;\r\n";
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}
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return $table_df;
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}
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/**
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* 获取指定表的数据定义
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*
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* @access public
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* @param string $table 表名
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* @param int $pos 备份开始位置
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*
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* @return int $post_pos 记录位置
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*/
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function get_table_data($table, $pos)
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{
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$post_pos = $pos;
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/* 获取数据表记录总数 */
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$total = $this->db->getOne("SELECT COUNT(*) FROM $table");
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if ($total == 0 || $pos >= $total)
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{
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/* 无须处理 */
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return -1;
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}
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/* 确定循环次数 */
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$cycle_time = ceil(($total-$pos) / $this->offset); //每次取offset条数。需要取的次数
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/* 循环查数据表 */
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for($i = 0; $i<$cycle_time; $i++)
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{
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/* 获取数据库数据 */
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$data = $this->db->getAll("SELECT * FROM $table LIMIT " . ($this->offset * $i + $pos) . ', ' . $this->offset);
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$data_count = count($data);
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$fields = array_keys($data[0]);
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$start_sql = "INSERT INTO `$table` ( `" . implode("`, `", $fields) . "` ) VALUES ";
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/* 循环将数据写入 */
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for($j=0; $j< $data_count; $j++)
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{
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$record = array_map("dump_escape_string", $data[$j]); //过滤非法字符
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$record = array_map("dump_null_string", $record); //处理null值
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/* 检查是否能写入，能则写入 */
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if ($this->is_short)
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{
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if ($post_pos == $total-1)
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{
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$tmp_dump_sql = " ( '" . implode("', '" , $record) . "' );\r\n";
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}
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else
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{
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if ($j == $data_count - 1)
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{
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$tmp_dump_sql = " ( '" . implode("', '" , $record) . "' );\r\n";
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}
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else
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{
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$tmp_dump_sql = " ( '" . implode("', '" , $record) . "' ),\r\n";
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}
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}
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if ($post_pos == $pos)
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{
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/* 第一次插入数据 */
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$tmp_dump_sql = $start_sql . "\r\n" . $tmp_dump_sql;
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}
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else
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{
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if ($j == 0)
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{
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$tmp_dump_sql = $start_sql . "\r\n" . $tmp_dump_sql;
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}
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}
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}
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else
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{
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$tmp_dump_sql = $start_sql . " ('" . implode("', '" , $record) . "');\r\n";
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}
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$tmp_str_pos = strpos($tmp_dump_sql, 'NULL'); //把记录中null值的引号去掉
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$tmp_dump_sql = empty($tmp_str_pos) ? $tmp_dump_sql : substr($tmp_dump_sql, 0, $tmp_str_pos - 1) . 'NULL' . substr($tmp_dump_sql, $tmp_str_pos + 5);
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if (strlen($this->dump_sql) + strlen($tmp_dump_sql) > $this->max_size - 32)
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{
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if ($this->sql_num == 0)
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{
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$this->dump_sql .= $tmp_dump_sql; //当是第一条记录时强制写入
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$this->sql_num++;
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$post_pos++;
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if ($post_pos == $total)
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{
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/* 所有数据已经写完 */
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return -1;
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}
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}
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return $post_pos;
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}
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else
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{
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$this->dump_sql .= $tmp_dump_sql;
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$this->sql_num++; //记录sql条数
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$post_pos++;
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}
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}
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}
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/* 所有数据已经写完 */
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return -1;
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}
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/**
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* 备份一个数据表
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*
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* @access public
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* @param string $path 保存路径表名的文件
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* @param int $vol 卷标
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*
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* @return array $tables 未备份完的表列表
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*/
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function dump_table($path, $vol)
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{
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$tables = $this->get_tables_list($path);
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if ($tables === false)
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{
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return false;
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}
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if (empty($tables))
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{
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return $tables;
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}
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$this->dump_sql = $this->make_head($vol);
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foreach($tables as $table => $pos)
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{
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if ($pos == -1)
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{
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/* 获取表定义，如果没有超过限制则保存 */
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$table_df = $this->get_table_df($table, true);
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if (strlen($this->dump_sql) + strlen($table_df) > $this->max_size - 32)
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{
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if ($this->sql_num == 0)
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{
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/* 第一条记录，强制写入 */
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$this->dump_sql .= $table_df;
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$this->sql_num +=2;
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$tables[$table] = 0;
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}
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/* 已经达到上限 */
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break;
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}
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else
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{
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$this->dump_sql .= $table_df;
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$this->sql_num +=2;
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$pos = 0;
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}
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}
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/* 尽可能多获取数据表数据 */
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$post_pos = $this->get_table_data($table, $pos);
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if ($post_pos == -1)
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{
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/* 该表已经完成，清除该表 */
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unset($tables[$table]);
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}
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else
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{
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/* 该表未完成。说明将要到达上限,记录备份数据位置 */
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$tables[$table] = $post_pos;
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break;
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}
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}
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$this->dump_sql .= '-- END SQL Dump Program ';
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$this->put_tables_list($path, $tables);
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return $tables;
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}
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/**
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* 生成备份文件头部
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*
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* @access public
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* @param int 文件卷数
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*
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* @return string $str 备份文件头部
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*/
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function make_head($vol)
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{
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/* 系统信息 */
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$sys_info['os'] = PHP_OS;
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$sys_info['web_server'] = $GLOBALS['ecs']->get_domain();
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$sys_info['php_ver'] = PHP_VERSION;
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$sys_info['mysql_ver'] = $this->db->version();
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$sys_info['date'] = date('Y-m-d H:i:s');
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$head = "-- SQL Dump Program\r\n".
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"-- " . $sys_info['web_server'] . "\r\n".
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"-- \r\n".
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"-- DATE : ".$sys_info["date"]."\r\n".
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"-- MYSQL SERVER VERSION : ".$sys_info['mysql_ver']."\r\n".
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"-- PHP VERSION : ".$sys_info['php_ver']."\r\n".
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"-- Vol : " . $vol . "\r\n";
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return $head;
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}
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/**
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* 获取备份文件信息
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*
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* @access public
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* @param string $path 备份文件路径
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*
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* @return array $arr 信息数组
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*/
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static function get_head($path)
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{
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/* 获取sql文件头部信息 */
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$sql_info = array('date'=>'', 'mysql_ver'=> '', 'php_ver'=>0, 'ecs_ver'=>'', 'vol'=>0);
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$fp = fopen($path,'rb');
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$str = fread($fp, 250);
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fclose($fp);
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$arr = explode("\n", $str);
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foreach ($arr AS $val)
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{
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$pos = strpos($val, ':');
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if ($pos > 0)
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{
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$type = trim(substr($val, 0, $pos), "-\n\r\t ");
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$value = trim(substr($val, $pos+1), "/\n\r\t ");
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if ($type == 'DATE')
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{
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$sql_info['date'] = $value;
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}
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elseif ($type == 'MYSQL SERVER VERSION')
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{
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$sql_info['mysql_ver'] = $value;
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}
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elseif ($type == 'PHP VERSION')
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{
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$sql_info['php_ver'] = $value;
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}
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elseif ($type == 'ECShop VERSION')
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{
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$sql_info['ecs_ver'] = $value;
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}
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elseif ($type == 'Vol')
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{
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$sql_info['vol'] = $value;
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}
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}
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}
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return $sql_info;
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}
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/**
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* 将文件中数据表列表取出
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*
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* @access public
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* @param string $path 文件路径
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*
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* @return array $arr 数据表列表
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*/
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function get_tables_list($path)
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{
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if (!file_exists($path))
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{
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$this->error_msg = $path . ' is not exists';
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return false;
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}
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$arr = array();
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$str = @file_get_contents($path);
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if (!empty($str))
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{
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$tmp_arr = explode("\n", $str);
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foreach ($tmp_arr as $val)
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{
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$val = trim ($val, "\r;");
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if (!empty($val))
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{
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list($table, $count) = explode(':',$val);
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$arr[$table] = $count;
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}
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}
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}
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return $arr;
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}
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/**
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* 将数据表数组写入指定文件
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*
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* @access public
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* @param string $path 文件路径
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* @param array $arr 要写入的数据
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*
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* @return boolen
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*/
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function put_tables_list($path, $arr)
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{
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if (is_array($arr))
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{
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$str = '';
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foreach($arr as $key => $val)
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{
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$str .= $key . ':' . $val . ";\r\n";
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}
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if (@file_put_contents($path, $str))
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{
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return true;
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}
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else
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{
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$this->error_msg = 'Can not write ' . $path;
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return false;
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}
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}
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else
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{
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$this->error_msg = 'It need a array';
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return false;
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}
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}
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/**
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* 返回一个随机的名字
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*
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* @access public
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* @param
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*
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* @return string $str 随机名称
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*/
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static function get_random_name()
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{
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$str = date('Ymd');
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for ($i = 0; $i < 6; $i++)
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{
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$str .= chr(mt_rand(97, 122));
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}
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return $str;
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}
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/**
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* 返回错误信息
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*
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* @access public
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* @param
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*
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* @return void
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*/
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function errorMsg()
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{
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return $this->error_msg;
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}
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}
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?>
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