package org.springblade.core.mp.support;
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/**
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* BladeX Commercial License Agreement
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* Copyright (c) 2018-2099, https://bladex.cn. All rights reserved.
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* <p>
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* Use of this software is governed by the Commercial License Agreement
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* obtained after purchasing a license from BladeX.
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* <p>
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* 1. This software is for development use only under a valid license
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* from BladeX.
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* <p>
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* 2. Redistribution of this software's source code to any third party
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* without a commercial license is strictly prohibited.
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* <p>
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* 3. Licensees may copyright their own code but cannot use segments
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* from this software for such purposes. Copyright of this software
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* remains with BladeX.
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* <p>
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* Using this software signifies agreement to this License, and the software
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* must not be used for illegal purposes.
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* <p>
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* THIS SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY. The author is
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* not liable for any claims arising from secondary or illegal development.
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* <p>
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* Author: Chill Zhuang (bladejava@qq.com)
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*/
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import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
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import lombok.SneakyThrows;
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import org.springblade.core.tool.utils.DateUtil;
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import org.springblade.core.tool.utils.Func;
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import org.springblade.core.tool.utils.StringPool;
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import org.springblade.core.tool.utils.StringUtil;
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import java.sql.SQLException;
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import java.util.Map;
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import java.util.regex.Pattern;
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/**
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* 定义常用的 sql关键字
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*
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* @author Chill
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*/
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public class SqlKeyword {
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/**
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* 常规sql字符匹配关键词
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*/
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private final static String SQL_REGEX = "(?i)(?<![a-z])('|%|--|insert|delete|select|sleep|count|update|updatexml|group|union|drop|truncate|alter|grant|execute|exec|xp_cmdshell|call|declare|sql)(?![a-z])";
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/**
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* 二次匹配防止双写等注入手段
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*/
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private final static Pattern PATTERN = Pattern.compile("(?:--|[\"';%]|\\binsert\\b|\\bdelete\\b|\\bselect\\b|\\bcount\\b|\\bupdate\\b|\\bupdatexml\\b|\\bsleep\\b|group\\s+by|\\bunion\\b|\\bdrop\\b|\\btruncate\\b|\\balter\\b|\\bgrant\\b|\\bexecute\\b|\\bxp_cmdshell\\b|\\bcall\\b|\\bdeclare\\b|\\bsql\\b)");
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/**
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* sql注入警告语
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*/
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private final static String SQL_INJECTION_MESSAGE = "SQL keyword injection prevention processing!";
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/**
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* sql关键字为空
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*/
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private final static String SQL_EMPTY_MESSAGE = "SQL keyword is empty!";
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/**
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* 等于
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*/
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private static final String EQUAL = "_equal";
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/**
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* 不等于
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*/
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private static final String NOT_EQUAL = "_notequal";
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/**
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* 模糊
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*/
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private static final String LIKE = "_like";
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/**
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* 左模糊
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*/
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private static final String LIKE_LEFT = "_likeleft";
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/**
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* 右模糊
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*/
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private static final String LIKE_RIGHT = "_likeright";
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/**
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* 不包含
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*/
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private static final String NOT_LIKE = "_notlike";
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/**
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* 大于等于
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*/
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private static final String GE = "_ge";
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/**
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* 小于等于
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*/
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private static final String LE = "_le";
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/**
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* 大于
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*/
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private static final String GT = "_gt";
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/**
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* 小于
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*/
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private static final String LT = "_lt";
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/**
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* 日期大于等于
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*/
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private static final String DATE_GE = "_datege";
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/**
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* 日期大于
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*/
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private static final String DATE_GT = "_dategt";
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/**
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* 日期等于
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*/
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private static final String DATE_EQUAL = "_dateequal";
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/**
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* 日期小于
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*/
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private static final String DATE_LT = "_datelt";
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/**
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* 日期小于等于
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*/
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private static final String DATE_LE = "_datele";
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/**
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* 为空
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*/
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private static final String IS_NULL = "_null";
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/**
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* 不为空
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*/
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private static final String NOT_NULL = "_notnull";
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/**
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* 忽略
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*/
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private static final String IGNORE = "_ignore";
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/**
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* 条件构造器
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*
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* @param query 查询字段
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* @param qw 查询包装类
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*/
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public static void buildCondition(Map<String, Object> query, QueryWrapper<?> qw) {
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if (Func.isEmpty(query)) {
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return;
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}
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query.forEach((k, v) -> {
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if (Func.hasEmpty(k, v) || k.endsWith(IGNORE)) {
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return;
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}
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// 过滤sql注入关键词
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k = filter(k);
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if (k.endsWith(EQUAL)) {
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qw.eq(getColumn(k, EQUAL), v);
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} else if (k.endsWith(NOT_EQUAL)) {
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qw.ne(getColumn(k, NOT_EQUAL), v);
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} else if (k.endsWith(LIKE_LEFT)) {
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qw.likeLeft(getColumn(k, LIKE_LEFT), v);
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} else if (k.endsWith(LIKE_RIGHT)) {
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qw.likeRight(getColumn(k, LIKE_RIGHT), v);
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} else if (k.endsWith(NOT_LIKE)) {
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qw.notLike(getColumn(k, NOT_LIKE), v);
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} else if (k.endsWith(GE)) {
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qw.ge(getColumn(k, GE), v);
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} else if (k.endsWith(LE)) {
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qw.le(getColumn(k, LE), v);
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} else if (k.endsWith(GT)) {
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qw.gt(getColumn(k, GT), v);
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} else if (k.endsWith(LT)) {
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qw.lt(getColumn(k, LT), v);
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} else if (k.endsWith(DATE_GE)) {
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qw.ge(getColumn(k, DATE_GE), DateUtil.parse(String.valueOf(v), DateUtil.PATTERN_DATETIME));
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} else if (k.endsWith(DATE_GT)) {
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qw.gt(getColumn(k, DATE_GT), DateUtil.parse(String.valueOf(v), DateUtil.PATTERN_DATETIME));
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} else if (k.endsWith(DATE_EQUAL)) {
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qw.eq(getColumn(k, DATE_EQUAL), DateUtil.parse(String.valueOf(v), DateUtil.PATTERN_DATETIME));
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} else if (k.endsWith(DATE_LE)) {
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qw.le(getColumn(k, DATE_LE), DateUtil.parse(String.valueOf(v), DateUtil.PATTERN_DATETIME));
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} else if (k.endsWith(DATE_LT)) {
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qw.lt(getColumn(k, DATE_LT), DateUtil.parse(String.valueOf(v), DateUtil.PATTERN_DATETIME));
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} else if (k.endsWith(IS_NULL)) {
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qw.isNull(getColumn(k, IS_NULL));
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} else if (k.endsWith(NOT_NULL)) {
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qw.isNotNull(getColumn(k, NOT_NULL));
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} else {
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qw.like(getColumn(k, LIKE), v);
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}
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});
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}
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/**
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* 获取数据库字段
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*
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* @param column 字段名
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* @param keyword 关键字
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* @return string
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*/
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private static String getColumn(String column, String keyword) {
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return StringUtil.humpToUnderline(StringUtil.removeSuffix(column, keyword));
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}
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/**
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* 把SQL关键字替换为空字符串
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*
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* @param param 关键字
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* @return string
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*/
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@SneakyThrows(SQLException.class)
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public static String filter(String param) {
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// 清除特殊字符
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String cleaned = StringUtil.cleanIdentifier(param);
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if (cleaned == null) {
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throw new SQLException(SQL_EMPTY_MESSAGE);
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}
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// 将校验到的sql关键词替换为空字符串
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String sql = cleaned.replaceAll(SQL_REGEX, StringPool.EMPTY);
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// 二次校验，避免双写绕过等情况出现
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if (match(sql)) {
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throw new SQLException(SQL_INJECTION_MESSAGE);
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}
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return sql;
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}
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/**
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* 判断字符是否包含SQL关键字
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*
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* @param param 关键字
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* @return boolean
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*/
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public static Boolean match(String param) {
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return Func.isNotEmpty(param) && PATTERN.matcher(param).find();
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}
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}
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