数据库防注入_Spring中依赖注入的四种方式

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方法一：摘自https://www.cnblogs.com/yuanchaoyong/p/7243492.htmlFilter拦截

包装request->创建过滤器->添加过滤器

通过扩展HttpServletRequestWrapper，对HttpServletRequest进行二次包装，覆盖其 public String[] getParameterValues(String name) 方法，在此方法中对各个参数值进行XSS过滤(Spring MVC 部分解析是调用的此方法)，实现方式： 1、XssAndSqlHttpServletRequestWrapper 类：

代码语言：javascript复制

import java.util.regex.Pattern;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
public class XssAndSqlHttpServletRequestWrapper extends HttpServletRequestWrapper {
HttpServletRequest orgRequest = null;
public XssAndSqlHttpServletRequestWrapper(HttpServletRequest request) {
super(request);
orgRequest = request;
}
/**
* 覆盖getParameter方法，将参数名和参数值都做xss & sql过滤。<br/>
* 如果需要获得原始的值，则通过super.getParameterValues(name)来获取<br/>
* getParameterNames,getParameterValues和getParameterMap也可能需要覆盖
*/
@Override
public String getParameter(String name) {
String value = super.getParameter(xssEncode(name));
if (value != null) {
value = xssEncode(value);
}
return value;
}
/**
* 覆盖getHeader方法，将参数名和参数值都做xss & sql过滤。<br/>
* 如果需要获得原始的值，则通过super.getHeaders(name)来获取<br/>
* getHeaderNames 也可能需要覆盖
*/
@Override
public String getHeader(String name) {
String value = super.getHeader(xssEncode(name));
if (value != null) {
value = xssEncode(value);
}
return value;
}
/**
* 将容易引起xss & sql漏洞的半角字符直接替换成全角字符
*
* @param s
* @return
*/
private static String xssEncode(String s) {
if (s == null || s.isEmpty()) {
return s;
}else{
s = stripXSSAndSql(s);
}
StringBuilder sb = new StringBuilder(s.length()   16);
for (int i = 0; i < s.length(); i  ) {
char c = s.charAt(i);
switch (c) {
case '>':
sb.append("＞");// 转义大于号
break;
case '<':
sb.append("＜");// 转义小于号
break;
case ''':
sb.append("＇");// 转义单引号
break;
case '"':
sb.append("＂");// 转义双引号
break;
case '&':
sb.append("＆");// 转义&
break;
case '#':
sb.append("＃");// 转义#
break;
default:
sb.append(c);
break;
}
}
return sb.toString();
}
/**
* 获取最原始的request
*
* @return
*/
public HttpServletRequest getOrgRequest() {
return orgRequest;
}
/**
* 获取最原始的request的静态方法
*
* @return
*/
public static HttpServletRequest getOrgRequest(HttpServletRequest req) {
if (req instanceof XssAndSqlHttpServletRequestWrapper) {
return ((XssAndSqlHttpServletRequestWrapper) req).getOrgRequest();
}
return req;
}
/**
*
* 防止xss跨脚本攻击（替换，根据实际情况调整）
*/
public static String stripXSSAndSql(String value) {
if (value != null) {
// NOTE: It's highly recommended to use the ESAPI library and
// uncomment the following line to
// avoid encoded attacks.
// value = ESAPI.encoder().canonicalize(value);
// Avoid null characters
/**         value = value.replaceAll("", "");***/
// Avoid anything between script tags
Pattern scriptPattern = Pattern.compile("<[rn| | ]*script[rn| | ]*>(.*?)</[rn| | ]*script[rn| | ]*>", Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid anything in a src="http://www.yihaomen.com/article/java/..." type of e-xpression
//            scriptPattern = Pattern.compile("src[rn| | ]*=[rn| | ]*[\"|\'](.*?)[\"|\']", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
//            value = scriptPattern.matcher(value).replaceAll("");
// Remove any lonesome </script> tag
scriptPattern = Pattern.compile("</[rn| | ]*script[rn| | ]*>", Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Remove any lonesome <script ...> tag
scriptPattern = Pattern.compile("<[rn| | ]*script(.*?)>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid eval(...) expressions
scriptPattern = Pattern.compile("eval\((.*?)\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid e-xpression(...) expressions
scriptPattern = Pattern.compile("e-xpression\((.*?)\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid javascript:... expressions
scriptPattern = Pattern.compile("javascript[rn| | ]*:[rn| | ]*", Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid vbscript:... expressions
scriptPattern = Pattern.compile("vbscript[rn| | ]*:[rn| | ]*", Pattern.CASE_INSENSITIVE);
value = scriptPattern.matcher(value).replaceAll("");
// Avoid onload= expressions
scriptPattern = Pattern.compile("onload(.*?)=", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
value = scriptPattern.matcher(value).replaceAll("");
}
return value;
}
}

2、XssAndSqlFilter 类：

代码语言：javascript复制

import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
public class XssAndSqlFilter implements Filter {
@Override
public void destroy() {
// TODO Auto-generated method stub
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
XssAndSqlHttpServletRequestWrapper xssRequest = new XssAndSqlHttpServletRequestWrapper((HttpServletRequest) request);
chain.doFilter(xssRequest, response);
}
@Override
public void init(FilterConfig arg0) throws ServletException {
// TODO Auto-generated method stub
}
}

3、web.xml配置

代码语言：javascript复制

  <!-- 解决xss & sql漏洞 -->
<filter>
<filter-name>xssAndSqlFilter</filter-name>
<filter-class>com.**.commons.filter.XssAndSqlFilter</filter-class>
</filter>
<!-- 解决xss & sql漏洞 -->
<filter-mapping>
<filter-name>xssAndSqlFilter</filter-name>
<url-pattern>*</url-pattern>
</filter-mapping>

亲测情况：利用easyui的form post提交有效，调用方式：

代码语言：javascript复制

<form id="resDataAddForm" method="post" enctype="multipart/form-data">
$('#resDataAddForm').form({...

代码语言：javascript复制

但是当下面的情况时失效，

代码语言：javascript复制

    <form id="onlinelyAddForm" method="post" class="layui-form">
form.on('submit(demo1)', function(data){
var data = data.field;
$.ajax({
type:"post",
url:"${path}/onlinely/add",
data:{"name":data.name,"p_reply_email":data.p_reply_email,"p_content":data.p_content},
dataType:"json",
async:false,
success: function (result) {
....

方法二：摘自https://blog.csdn.net/zhuangnet/article/details/78744004，为防止删博客，移植过来。

主要思路是：在Spring MVC调用Controller前，通过动态代理和反射机制对Controller的调用进行拦截，并在挡截中对Mehtod参数的值进行XSS过滤替换。

1、 HandlerExecutionChainWrapper.java

代码语言：javascript复制

import org.springframework.beans.factory.BeanFactory;
import org.springframework.cglib.proxy.Enhancer;
import org.springframework.cglib.proxy.MethodInterceptor;
import org.springframework.cglib.proxy.MethodProxy;
import org.springframework.util.ReflectionUtils;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerExecutionChain;
import org.springframework.web.util.HtmlUtils;
import javax.servlet.http.HttpServletRequest;
import java.lang.reflect.Field;
import java.lang.reflect.Method;
import java.util.ArrayList;
import java.util.List;
/**
* Created by zhanghuaiyu on 2019/6/14.
*/
public class HandlerExecutionChainWrapper extends HandlerExecutionChain {
private BeanFactory beanFactory;
private HttpServletRequest request;
private HandlerMethod handlerWrapper;
private byte[] lock = new byte[0];
public HandlerExecutionChainWrapper(HandlerExecutionChain chain,
HttpServletRequest request,
BeanFactory beanFactory) {
super(chain.getHandler(),chain.getInterceptors());
this.request = request;
this.beanFactory = beanFactory;
}
@Override
public Object getHandler() {
if (handlerWrapper != null) {
return handlerWrapper;
}
synchronized (lock) {
if (handlerWrapper != null) {
return handlerWrapper;
}
HandlerMethod superMethodHandler = (HandlerMethod)super.getHandler();
Object proxyBean = createProxyBean(superMethodHandler);
handlerWrapper = new HandlerMethod(proxyBean,superMethodHandler.getMethod());
return handlerWrapper;
}
}
/**
* 为Controller Bean创建一个代理实例,以便用于 实现调用真实Controller Bean前的切面拦截
* 用以过滤方法参数中可能的XSS注入
* @param handler
* @return
*/
private Object createProxyBean(HandlerMethod handler) {
try {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(handler.getBeanType());
Object bean = handler.getBean();
if (bean instanceof String) {
bean = beanFactory.getBean((String)bean);
}
ControllerXssInterceptor xss = new ControllerXssInterceptor(bean);
xss.setRequest(this.request);
enhancer.setCallback(xss);
return enhancer.create();
}catch(Exception e) {
throw new IllegalStateException("为Controller创建代理失败:" e.getMessage(), e);
}
}
public static class ControllerXssInterceptor implements MethodInterceptor {
private Object target;
private HttpServletRequest request;
private List<String> objectMatchPackages;
public ControllerXssInterceptor(Object target) {
this.target = target;
this.objectMatchPackages = new ArrayList<String>();
this.objectMatchPackages.add("com.xx");
}
public void setRequest(HttpServletRequest request) {
this.request = request;
}
@Override
public Object intercept(Object obj, Method method, Object[] args,
MethodProxy proxy)
throws Throwable {
//对Controller的方法参数进行调用前处理
//过滤String类型参数中可能存在的XSS注入
if (args != null) {
for (int i=0;i<args.length;i  ) {
if (args[i]==null)
continue;
if (args[i] instanceof String) {
args[i] = stringXssReplace((String)args[i]);
continue;
}
for(String pk:objectMatchPackages) {
if (args[i].getClass().getName().startsWith(pk)) {
objectXssReplace(args[i]);
break;
}
}
}
}
return method.invoke(target, args);
}
private String stringXssReplace(String argument) {
return HtmlUtils.htmlEscape(argument);
}
private void objectXssReplace(final Object argument) {
if (argument == null)
return;
ReflectionUtils.doWithFields(argument.getClass(), new ReflectionUtils.FieldCallback(){
@Override
public void doWith(Field field) throws IllegalArgumentException, IllegalAccessException {
ReflectionUtils.makeAccessible(field);
String fv = (String)field.get(argument);
if (fv != null) {
String nv = HtmlUtils.htmlEscape(fv);
field.set(argument, nv);
}
}
}, new ReflectionUtils.FieldFilter(){
@Override
public boolean matches(Field field) {
boolean typeMatch = String.class.equals(field.getType());
if (request!=null && "GET".equals(request.getMethod())) {
boolean requMatch = request.getParameterMap().containsKey(field.getName());
return typeMatch && requMatch;
}
return typeMatch;
}
});
}
}
}

2、DispatcherServletWrapper.java

代码语言：javascript复制

import org.springframework.stereotype.Controller;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.DispatcherServlet;
import org.springframework.web.servlet.HandlerExecutionChain;
import javax.servlet.http.HttpServletRequest;
@SuppressWarnings("serial")
public class DispatcherServletWrapper extends DispatcherServlet {
@Override
protected HandlerExecutionChain getHandler(HttpServletRequest request) throws Exception {
HandlerExecutionChain chain = super.getHandler(request);
Object handler = chain.getHandler();
if (!(handler instanceof HandlerMethod)) {
return chain;
}
HandlerMethod hm = (HandlerMethod)handler;
if (!hm.getBeanType().isAnnotationPresent(Controller.class)) {
return chain;
}
//本扩展仅处理@Controller注解的Bean
return new HandlerExecutionChainWrapper(chain,request,getWebApplicationContext());
}
}

3、web.xml

代码语言：javascript复制

 <servlet>
<servlet-name>spring-mvc</servlet-name>
<servlet-class>com.xxxx.commons.filter.DispatcherServletWrapper</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:spring-mvc.xml</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
<async-supported>true</async-supported>
<multipart-config>
<location>/</location>
<max-file-size>524288000</max-file-size>
<max-request-size>2097152000</max-request-size>
<file-size-threshold>0</file-size-threshold>
</multipart-config>
</servlet>

亲测上面的问题解决了，但是第一种方式也没删掉。没有全面测试，只是把第一种方式的问题解决了。理论上应该是没有问题的

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