/*
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* Copyright (c) 2018-2028, Chill Zhuang All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* Neither the name of the dreamlu.net developer nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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* Author: Chill 庄骞 (smallchill@163.com)
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*/
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package org.springblade.core.boot.request;
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import org.springblade.core.tool.utils.StringUtil;
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import org.springblade.core.tool.utils.WebUtil;
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import org.springframework.http.HttpHeaders;
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import org.springframework.http.MediaType;
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import javax.servlet.ReadListener;
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import javax.servlet.ServletInputStream;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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import java.io.BufferedReader;
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import java.io.ByteArrayInputStream;
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import java.io.IOException;
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import java.io.InputStreamReader;
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import java.util.LinkedHashMap;
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import java.util.Map;
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/**
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* XSS过滤
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*
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* @author Chill
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*/
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public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
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/**
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* 没被包装过的HttpServletRequest（特殊场景,需要自己过滤）
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*/
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private final HttpServletRequest orgRequest;
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/**
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* 缓存报文,支持多次读取流
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*/
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private byte[] body;
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/**
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* html过滤
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*/
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private final static XssHtmlFilter HTML_FILTER = new XssHtmlFilter();
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public XssHttpServletRequestWrapper(HttpServletRequest request) {
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super(request);
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orgRequest = request;
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}
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@Override
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public BufferedReader getReader() throws IOException {
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return new BufferedReader(new InputStreamReader(getInputStream()));
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}
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@Override
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public ServletInputStream getInputStream() throws IOException {
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if (super.getHeader(HttpHeaders.CONTENT_TYPE) == null) {
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return super.getInputStream();
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}
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if (super.getHeader(HttpHeaders.CONTENT_TYPE).startsWith(MediaType.MULTIPART_FORM_DATA_VALUE)) {
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return super.getInputStream();
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}
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if (body == null) {
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body = xssEncode(WebUtil.getRequestBody(super.getInputStream())).getBytes();
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}
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final ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(body);
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return new ServletInputStream() {
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@Override
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public int read() {
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return byteArrayInputStream.read();
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}
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@Override
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public boolean isFinished() {
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return false;
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}
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@Override
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public boolean isReady() {
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return false;
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}
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@Override
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public void setReadListener(ReadListener readListener) {
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}
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};
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}
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@Override
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public String getParameter(String name) {
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String value = super.getParameter(xssEncode(name));
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if (StringUtil.isNotBlank(value)) {
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value = xssEncode(value);
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}
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return value;
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}
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@Override
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public String[] getParameterValues(String name) {
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String[] parameters = super.getParameterValues(name);
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if (parameters == null || parameters.length == 0) {
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return null;
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}
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for (int i = 0; i < parameters.length; i++) {
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parameters[i] = xssEncode(parameters[i]);
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}
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return parameters;
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}
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@Override
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public Map<String, String[]> getParameterMap() {
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Map<String, String[]> map = new LinkedHashMap<>();
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Map<String, String[]> parameters = super.getParameterMap();
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for (String key : parameters.keySet()) {
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String[] values = parameters.get(key);
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for (int i = 0; i < values.length; i++) {
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values[i] = xssEncode(values[i]);
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}
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map.put(key, values);
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}
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return map;
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}
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@Override
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public String getHeader(String name) {
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String value = super.getHeader(xssEncode(name));
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if (StringUtil.isNotBlank(value)) {
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value = xssEncode(value);
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}
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return value;
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}
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private String xssEncode(String input) {
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return HTML_FILTER.filter(input);
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}
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/**
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* 获取初始request
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*
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* @return HttpServletRequest
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*/
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public HttpServletRequest getOrgRequest() {
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return orgRequest;
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}
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/**
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* 获取初始request
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*
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* @param request request
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* @return HttpServletRequest
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*/
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public static HttpServletRequest getOrgRequest(HttpServletRequest request) {
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if (request instanceof XssHttpServletRequestWrapper) {
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return ((XssHttpServletRequestWrapper) request).getOrgRequest();
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}
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return request;
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}
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}
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