/**
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* Copyright (c) 2011-2014, hubin (jobob@qq.com).
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may not
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* use this file except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations under
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* the License.
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*/
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package com.dsh.guns.core.support;
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import javax.servlet.http.Cookie;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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import java.util.HashMap;
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import java.util.Map;
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/**
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* Request请求过滤包装
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* <p>
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* @author hubin
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* @Date 2014-5-8
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*/
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public class WafRequestWrapper extends HttpServletRequestWrapper {
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private boolean filterXSS = true;
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private boolean filterSQL = true;
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public WafRequestWrapper(HttpServletRequest request, boolean filterXSS, boolean filterSQL) {
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super(request);
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this.filterXSS = filterXSS;
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this.filterSQL = filterSQL;
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}
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public WafRequestWrapper(HttpServletRequest request) {
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this(request, true, true);
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}
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/**
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* @Description 数组参数过滤
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* @param parameter
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* 过滤参数
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* @return
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*/
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@Override
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public String[] getParameterValues(String parameter) {
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String[] values = super.getParameterValues(parameter);
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if ( values == null ) {
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return null;
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}
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int count = values.length;
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String[] encodedValues = new String[count];
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for ( int i = 0 ; i < count ; i++ ) {
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encodedValues[i] = filterParamString(values[i]);
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}
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return encodedValues;
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}
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@Override
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@SuppressWarnings({ "rawtypes", "unchecked" })
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public Map getParameterMap() {
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Map<String, String[]> primary = super.getParameterMap();
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Map<String, String[]> result = new HashMap<String, String[]>(primary.size());
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for ( Map.Entry<String, String[]> entry : primary.entrySet() ) {
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result.put(entry.getKey(), filterEntryString(entry.getValue()));
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}
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return result;
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}
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protected String[] filterEntryString(String[] rawValue) {
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for ( int i = 0 ; i < rawValue.length ; i++ ) {
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rawValue[i] = filterParamString(rawValue[i]);
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}
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return rawValue;
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}
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/**
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* @Description 参数过滤
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* @param parameter
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* 过滤参数
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* @return
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*/
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@Override
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public String getParameter(String parameter) {
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return filterParamString(super.getParameter(parameter));
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}
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/**
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* @Description 请求头过滤
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* @param name
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* 过滤内容
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* @return
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*/
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@Override
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public String getHeader(String name) {
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return filterParamString(super.getHeader(name));
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}
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/**
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* @Description Cookie内容过滤
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* @return
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*/
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@Override
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public Cookie[] getCookies() {
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Cookie[] existingCookies = super.getCookies();
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if (existingCookies != null) {
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for (int i = 0 ; i < existingCookies.length ; ++i) {
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Cookie cookie = existingCookies[i];
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cookie.setValue(filterParamString(cookie.getValue()));
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}
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}
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return existingCookies;
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}
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/**
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* @Description 过滤字符串内容
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* @param rawValue
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* 待处理内容
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* @return
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*/
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protected String filterParamString(String rawValue) {
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if (null == rawValue) {
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return null;
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}
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String tmpStr = rawValue;
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if (this.filterXSS) {
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tmpStr = WafKit.stripXSS(rawValue);
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}
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if (this.filterSQL) {
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tmpStr = WafKit.stripSqlInjection(tmpStr);
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}
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return tmpStr;
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}
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}
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