com.migo.defence.XssHttpServletRequestWrapper.java Source code

Introduction

Here is the source code for com.migo.defence.XssHttpServletRequestWrapper.java

Source

/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.migo.defence;

import org.apache.commons.lang.StringUtils;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletRequestWrapper;
import java.util.LinkedHashMap;
import java.util.Map;

/**
 * @author 
 * @email fei6751803@163.com
 */
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {

    //HttpServletRequest
    HttpServletRequest orgRequest;
    //html
    private final static HTMLFilter htmlFilter = new HTMLFilter();

    public XssHttpServletRequestWrapper(HttpServletRequest request) {
        super(request);
        orgRequest = request;
    }

    @Override
    public String getParameter(String name) {
        String value = super.getParameter(xssEncode(name));
        if (StringUtils.isNotBlank(value)) {
            value = xssEncode(value);
        }
        return value;
    }

    @Override
    public String[] getParameterValues(String name) {
        String[] parameters = super.getParameterValues(name);
        if (parameters == null || parameters.length == 0) {
            return null;
        }

        for (int i = 0; i < parameters.length; i++) {
            parameters[i] = xssEncode(parameters[i]);
        }
        return parameters;
    }

    @Override
    public Map<String, String[]> getParameterMap() {
        Map<String, String[]> map = new LinkedHashMap<>();
        Map<String, String[]> parameters = super.getParameterMap();
        for (String key : parameters.keySet()) {
            String[] values = parameters.get(key);
            for (int i = 0; i < values.length; i++) {
                values[i] = xssEncode(values[i]);
            }
            map.put(key, values);
        }
        return map;
    }

    @Override
    public String getHeader(String name) {
        String value = super.getHeader(xssEncode(name));
        if (StringUtils.isNotBlank(value)) {
            value = xssEncode(value);
        }
        return value;
    }

    private String xssEncode(String input) {
        return htmlFilter.filter(input);
    }

    /**
     * ?request
     */
    public HttpServletRequest getOrgRequest() {
        return orgRequest;
    }

    /**
     * ?request
     */
    public static HttpServletRequest getOrgRequest(HttpServletRequest request) {
        if (request instanceof XssHttpServletRequestWrapper) {
            return ((XssHttpServletRequestWrapper) request).getOrgRequest();
        }

        return request;
    }
}