修复xss

src/cn/com/usky/filter/HTMLFilter.java

@@ -0,0 +1,530 @@
+package cn.com.usky.filter;
+
+import java.util.*;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.logging.Logger;
+import java.util.regex.Matcher;
+import java.util.regex.Pattern;
+
+/**
+ *
+ * HTML filtering utility for protecting against XSS (Cross Site Scripting).
+ *
+ * This code is licensed LGPLv3
+ *
+ * This code is a Java port of the original work in PHP by Cal Hendersen.
+ * http://code.iamcal.com/php/lib_filter/
+ *
+ * The trickiest part of the translation was handling the differences in regex handling
+ * between PHP and Java.  These resources were helpful in the process:
+ *
+ * http://java.sun.com/j2se/1.4.2/docs/api/java/util/regex/Pattern.html
+ * http://us2.php.net/manual/en/reference.pcre.pattern.modifiers.php
+ * http://www.regular-expressions.info/modifiers.html
+ *
+ * A note on naming conventions: instance variables are prefixed with a "v"; global
+ * constants are in all caps.
+ *
+ * Sample use:
+ * String input = ...
+ * String clean = new HTMLFilter().filter( input );
+ *
+ * The class is not thread safe. Create a new instance if in doubt.
+ *
+ * If you find bugs or have suggestions on improvement (especially regarding
+ * performance), please contact us.  The latest version of this
+ * source, and our contact details, can be found at http://xss-html-filter.sf.net
+ *
+ * @author Joseph O'Connell
+ * @author Cal Hendersen
+ * @author Michael Semb Wever
+ */
+public final class HTMLFilter {
+
+    /** regex flag union representing /si modifiers in php **/
+    private static final int REGEX_FLAGS_SI = Pattern.CASE_INSENSITIVE | Pattern.DOTALL;
+    private static final Pattern P_COMMENTS = Pattern.compile("<!--(.*?)-->", Pattern.DOTALL);
+    private static final Pattern P_COMMENT = Pattern.compile("^!--(.*)--$", REGEX_FLAGS_SI);
+    private static final Pattern P_TAGS = Pattern.compile("<(.*?)>", Pattern.DOTALL);
+    private static final Pattern P_END_TAG = Pattern.compile("^/([a-z0-9]+)", REGEX_FLAGS_SI);
+    private static final Pattern P_START_TAG = Pattern.compile("^([a-z0-9]+)(.*?)(/?)$", REGEX_FLAGS_SI);
+    private static final Pattern P_QUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)=([\"'])(.*?)\\2", REGEX_FLAGS_SI);
+    private static final Pattern P_UNQUOTED_ATTRIBUTES = Pattern.compile("([a-z0-9]+)(=)([^\"\\s']+)", REGEX_FLAGS_SI);
+    private static final Pattern P_PROTOCOL = Pattern.compile("^([^:]+):", REGEX_FLAGS_SI);
+    private static final Pattern P_ENTITY = Pattern.compile("&#(\\d+);?");
+    private static final Pattern P_ENTITY_UNICODE = Pattern.compile("&#x([0-9a-f]+);?");
+    private static final Pattern P_ENCODE = Pattern.compile("%([0-9a-f]{2});?");
+    private static final Pattern P_VALID_ENTITIES = Pattern.compile("&([^&;]*)(?=(;|&|$))");
+    private static final Pattern P_VALID_QUOTES = Pattern.compile("(>|^)([^<]+?)(<|$)", Pattern.DOTALL);
+    private static final Pattern P_END_ARROW = Pattern.compile("^>");
+    private static final Pattern P_BODY_TO_END = Pattern.compile("<([^>]*?)(?=<|$)");
+    private static final Pattern P_XML_CONTENT = Pattern.compile("(^|>)([^<]*?)(?=>)");
+    private static final Pattern P_STRAY_LEFT_ARROW = Pattern.compile("<([^>]*?)(?=<|$)");
+    private static final Pattern P_STRAY_RIGHT_ARROW = Pattern.compile("(^|>)([^<]*?)(?=>)");
+    private static final Pattern P_AMP = Pattern.compile("&");
+    private static final Pattern P_QUOTE = Pattern.compile("\"");
+    private static final Pattern P_LEFT_ARROW = Pattern.compile("<");
+    private static final Pattern P_RIGHT_ARROW = Pattern.compile(">");
+    private static final Pattern P_BOTH_ARROWS = Pattern.compile("<>");
+
+    // @xxx could grow large... maybe use sesat's ReferenceMap
+    private static final ConcurrentMap<String,Pattern> P_REMOVE_PAIR_BLANKS = new ConcurrentHashMap<String, Pattern>();
+    private static final ConcurrentMap<String,Pattern> P_REMOVE_SELF_BLANKS = new ConcurrentHashMap<String, Pattern>();
+
+    /** set of allowed html elements, along with allowed attributes for each element **/
+    private final Map<String, List<String>> vAllowed;
+    /** counts of open tags for each (allowable) html element **/
+    private final Map<String, Integer> vTagCounts = new HashMap<String, Integer>();
+
+    /** html elements which must always be self-closing (e.g. "<img />") **/
+    private final String[] vSelfClosingTags;
+    /** html elements which must always have separate opening and closing tags (e.g. "<b></b>") **/
+    private final String[] vNeedClosingTags;
+    /** set of disallowed html elements **/
+    private final String[] vDisallowed;
+    /** attributes which should be checked for valid protocols **/
+    private final String[] vProtocolAtts;
+    /** allowed protocols **/
+    private final String[] vAllowedProtocols;
+    /** tags which should be removed if they contain no content (e.g. "<b></b>" or "<b />") **/
+    private final String[] vRemoveBlanks;
+    /** entities allowed within html markup **/
+    private final String[] vAllowedEntities;
+    /** flag determining whether comments are allowed in input String. */
+    private final boolean stripComment;
+    private final boolean encodeQuotes;
+    private boolean vDebug = false;
+    /**
+     * flag determining whether to try to make tags when presented with "unbalanced"
+     * angle brackets (e.g. "<b text </b>" becomes "<b> text </b>").  If set to false,
+     * unbalanced angle brackets will be html escaped.
+     */
+    private final boolean alwaysMakeTags;
+
+    /** Default constructor.
+     *
+     */
+    public HTMLFilter() {
+        vAllowed = new HashMap<String, List<String>>();
+
+        final ArrayList<String> a_atts = new ArrayList<String>();
+        a_atts.add("href");
+        a_atts.add("target");
+        vAllowed.put("a", a_atts);
+
+        final ArrayList<String> img_atts = new ArrayList<String>();
+        img_atts.add("src");
+        img_atts.add("width");
+        img_atts.add("height");
+        img_atts.add("alt");
+        vAllowed.put("img", img_atts);
+
+        final ArrayList<String> no_atts = new ArrayList<String>();
+        vAllowed.put("b", no_atts);
+        vAllowed.put("strong", no_atts);
+        vAllowed.put("i", no_atts);
+        vAllowed.put("em", no_atts);
+
+        vSelfClosingTags = new String[]{"img"};
+        vNeedClosingTags = new String[]{"a", "b", "strong", "i", "em"};
+        vDisallowed = new String[]{};
+        vAllowedProtocols = new String[]{"http", "mailto", "https"}; // no ftp.
+        vProtocolAtts = new String[]{"src", "href"};
+        vRemoveBlanks = new String[]{"a", "b", "strong", "i", "em"};
+        vAllowedEntities = new String[]{"amp", "gt", "lt", "quot"};
+        stripComment = true;
+        encodeQuotes = true;
+        alwaysMakeTags = true;
+    }
+
+    /** Set debug flag to true. Otherwise use default settings. See the default constructor.
+     *
+     * @param debug turn debug on with a true argument
+     */
+    public HTMLFilter(final boolean debug) {
+        this();
+        vDebug = debug;
+
+    }
+
+    /** Map-parameter configurable constructor.
+     *
+     * @param conf map containing configuration. keys match field names.
+     */
+    public HTMLFilter(final Map<String,Object> conf) {
+
+        assert conf.containsKey("vAllowed") : "configuration requires vAllowed";
+        assert conf.containsKey("vSelfClosingTags") : "configuration requires vSelfClosingTags";
+        assert conf.containsKey("vNeedClosingTags") : "configuration requires vNeedClosingTags";
+        assert conf.containsKey("vDisallowed") : "configuration requires vDisallowed";
+        assert conf.containsKey("vAllowedProtocols") : "configuration requires vAllowedProtocols";
+        assert conf.containsKey("vProtocolAtts") : "configuration requires vProtocolAtts";
+        assert conf.containsKey("vRemoveBlanks") : "configuration requires vRemoveBlanks";
+        assert conf.containsKey("vAllowedEntities") : "configuration requires vAllowedEntities";
+
+        vAllowed = Collections.unmodifiableMap((HashMap<String, List<String>>) conf.get("vAllowed"));
+        vSelfClosingTags = (String[]) conf.get("vSelfClosingTags");
+        vNeedClosingTags = (String[]) conf.get("vNeedClosingTags");
+        vDisallowed = (String[]) conf.get("vDisallowed");
+        vAllowedProtocols = (String[]) conf.get("vAllowedProtocols");
+        vProtocolAtts = (String[]) conf.get("vProtocolAtts");
+        vRemoveBlanks = (String[]) conf.get("vRemoveBlanks");
+        vAllowedEntities = (String[]) conf.get("vAllowedEntities");
+        stripComment =  conf.containsKey("stripComment") ? (Boolean) conf.get("stripComment") : true;
+        encodeQuotes = conf.containsKey("encodeQuotes") ? (Boolean) conf.get("encodeQuotes") : true;
+        alwaysMakeTags = conf.containsKey("alwaysMakeTags") ? (Boolean) conf.get("alwaysMakeTags") : true;
+    }
+
+    private void reset() {
+        vTagCounts.clear();
+    }
+
+    private void debug(final String msg) {
+        if (vDebug) {
+            Logger.getAnonymousLogger().info(msg);
+        }
+    }
+
+    //---------------------------------------------------------------
+    // my versions of some PHP library functions
+    public static String chr(final int decimal) {
+        return String.valueOf((char) decimal);
+    }
+
+    public static String htmlSpecialChars(final String s) {
+        String result = s;
+        result = regexReplace(P_AMP, "&amp;", result);
+        result = regexReplace(P_QUOTE, "&quot;", result);
+        result = regexReplace(P_LEFT_ARROW, "&lt;", result);
+        result = regexReplace(P_RIGHT_ARROW, "&gt;", result);
+        return result;
+    }
+
+    //---------------------------------------------------------------
+    /**
+     * given a user submitted input String, filter out any invalid or restricted
+     * html.
+     *
+     * @param input text (i.e. submitted by a user) than may contain html
+     * @return "clean" version of input, with only valid, whitelisted html elements allowed
+     */
+    public String filter(final String input) {
+        reset();
+        String s = input;
+
+        debug("************************************************");
+        debug("              INPUT: " + input);
+
+        s = escapeComments(s);
+        debug("     escapeComments: " + s);
+
+        s = balanceHTML(s);
+        debug("        balanceHTML: " + s);
+
+        s = checkTags(s);
+        debug("          checkTags: " + s);
+
+        s = processRemoveBlanks(s);
+        debug("processRemoveBlanks: " + s);
+
+        s = validateEntities(s);
+        debug("    validateEntites: " + s);
+
+        debug("************************************************\n\n");
+        return s;
+    }
+
+    public boolean isAlwaysMakeTags(){
+        return alwaysMakeTags;
+    }
+
+    public boolean isStripComments(){
+        return stripComment;
+    }
+
+    private String escapeComments(final String s) {
+        final Matcher m = P_COMMENTS.matcher(s);
+        final StringBuffer buf = new StringBuffer();
+        if (m.find()) {
+            final String match = m.group(1); //(.*?)
+            m.appendReplacement(buf, Matcher.quoteReplacement("<!--" + htmlSpecialChars(match) + "-->"));
+        }
+        m.appendTail(buf);
+
+        return buf.toString();
+    }
+
+    private String balanceHTML(String s) {
+        if (alwaysMakeTags) {
+            //
+            // try and form html
+            //
+            s = regexReplace(P_END_ARROW, "", s);
+            s = regexReplace(P_BODY_TO_END, "<$1>", s);
+            s = regexReplace(P_XML_CONTENT, "$1<$2", s);
+
+        } else {
+            //
+            // escape stray brackets
+            //
+            s = regexReplace(P_STRAY_LEFT_ARROW, "&lt;$1", s);
+            s = regexReplace(P_STRAY_RIGHT_ARROW, "$1$2&gt;<", s);
+
+            //
+            // the last regexp causes '<>' entities to appear
+            // (we need to do a lookahead assertion so that the last bracket can
+            // be used in the next pass of the regexp)
+            //
+            s = regexReplace(P_BOTH_ARROWS, "", s);
+        }
+
+        return s;
+    }
+
+    private String checkTags(String s) {
+        Matcher m = P_TAGS.matcher(s);
+
+        final StringBuffer buf = new StringBuffer();
+        while (m.find()) {
+            String replaceStr = m.group(1);
+            replaceStr = processTag(replaceStr);
+            m.appendReplacement(buf, Matcher.quoteReplacement(replaceStr));
+        }
+        m.appendTail(buf);
+
+        s = buf.toString();
+
+        // these get tallied in processTag
+        // (remember to reset before subsequent calls to filter method)
+        for (String key : vTagCounts.keySet()) {
+            for (int ii = 0; ii < vTagCounts.get(key); ii++) {
+                s += "</" + key + ">";
+            }
+        }
+
+        return s;
+    }
+
+    private String processRemoveBlanks(final String s) {
+        String result = s;
+        for (String tag : vRemoveBlanks) {
+            if(!P_REMOVE_PAIR_BLANKS.containsKey(tag)){
+                P_REMOVE_PAIR_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?></" + tag + ">"));
+            }
+            result = regexReplace(P_REMOVE_PAIR_BLANKS.get(tag), "", result);
+            if(!P_REMOVE_SELF_BLANKS.containsKey(tag)){
+                P_REMOVE_SELF_BLANKS.putIfAbsent(tag, Pattern.compile("<" + tag + "(\\s[^>]*)?/>"));
+            }
+            result = regexReplace(P_REMOVE_SELF_BLANKS.get(tag), "", result);
+        }
+
+        return result;
+    }
+
+    private static String regexReplace(final Pattern regex_pattern, final String replacement, final String s) {
+        Matcher m = regex_pattern.matcher(s);
+        return m.replaceAll(replacement);
+    }
+
+    private String processTag(final String s) {
+        // ending tags
+        Matcher m = P_END_TAG.matcher(s);
+        if (m.find()) {
+            final String name = m.group(1).toLowerCase();
+            if (allowed(name)) {
+                if (!inArray(name, vSelfClosingTags)) {
+                    if (vTagCounts.containsKey(name)) {
+                        vTagCounts.put(name, vTagCounts.get(name) - 1);
+                        return "</" + name + ">";
+                    }
+                }
+            }
+        }
+
+        // starting tags
+        m = P_START_TAG.matcher(s);
+        if (m.find()) {
+            final String name = m.group(1).toLowerCase();
+            final String body = m.group(2);
+            String ending = m.group(3);
+
+            //debug( "in a starting tag, name='" + name + "'; body='" + body + "'; ending='" + ending + "'" );
+            if (allowed(name)) {
+                String params = "";
+
+                final Matcher m2 = P_QUOTED_ATTRIBUTES.matcher(body);
+                final Matcher m3 = P_UNQUOTED_ATTRIBUTES.matcher(body);
+                final List<String> paramNames = new ArrayList<String>();
+                final List<String> paramValues = new ArrayList<String>();
+                while (m2.find()) {
+                    paramNames.add(m2.group(1)); //([a-z0-9]+)
+                    paramValues.add(m2.group(3)); //(.*?)
+                }
+                while (m3.find()) {
+                    paramNames.add(m3.group(1)); //([a-z0-9]+)
+                    paramValues.add(m3.group(3)); //([^\"\\s']+)
+                }
+
+                String paramName, paramValue;
+                for (int ii = 0; ii < paramNames.size(); ii++) {
+                    paramName = paramNames.get(ii).toLowerCase();
+                    paramValue = paramValues.get(ii);
+
+//          debug( "paramName='" + paramName + "'" );
+//          debug( "paramValue='" + paramValue + "'" );
+//          debug( "allowed? " + vAllowed.get( name ).contains( paramName ) );
+
+                    if (allowedAttribute(name, paramName)) {
+                        if (inArray(paramName, vProtocolAtts)) {
+                            paramValue = processParamProtocol(paramValue);
+                        }
+                        params += " " + paramName + "=\"" + paramValue + "\"";
+                    }
+                }
+
+                if (inArray(name, vSelfClosingTags)) {
+                    ending = " /";
+                }
+
+                if (inArray(name, vNeedClosingTags)) {
+                    ending = "";
+                }
+
+                if (ending == null || ending.length() < 1) {
+                    if (vTagCounts.containsKey(name)) {
+                        vTagCounts.put(name, vTagCounts.get(name) + 1);
+                    } else {
+                        vTagCounts.put(name, 1);
+                    }
+                } else {
+                    ending = " /";
+                }
+                return "<" + name + params + ending + ">";
+            } else {
+                return "";
+            }
+        }
+
+        // comments
+        m = P_COMMENT.matcher(s);
+        if (!stripComment && m.find()) {
+            return  "<" + m.group() + ">";
+        }
+
+        return "";
+    }
+
+    private String processParamProtocol(String s) {
+        s = decodeEntities(s);
+        final Matcher m = P_PROTOCOL.matcher(s);
+        if (m.find()) {
+            final String protocol = m.group(1);
+            if (!inArray(protocol, vAllowedProtocols)) {
+                // bad protocol, turn into local anchor link instead
+                s = "#" + s.substring(protocol.length() + 1, s.length());
+                if (s.startsWith("#//")) {
+                    s = "#" + s.substring(3, s.length());
+                }
+            }
+        }
+
+        return s;
+    }
+
+    private String decodeEntities(String s) {
+        StringBuffer buf = new StringBuffer();
+
+        Matcher m = P_ENTITY.matcher(s);
+        while (m.find()) {
+            final String match = m.group(1);
+            final int decimal = Integer.decode(match).intValue();
+            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
+        }
+        m.appendTail(buf);
+        s = buf.toString();
+
+        buf = new StringBuffer();
+        m = P_ENTITY_UNICODE.matcher(s);
+        while (m.find()) {
+            final String match = m.group(1);
+            final int decimal = Integer.valueOf(match, 16).intValue();
+            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
+        }
+        m.appendTail(buf);
+        s = buf.toString();
+
+        buf = new StringBuffer();
+        m = P_ENCODE.matcher(s);
+        while (m.find()) {
+            final String match = m.group(1);
+            final int decimal = Integer.valueOf(match, 16).intValue();
+            m.appendReplacement(buf, Matcher.quoteReplacement(chr(decimal)));
+        }
+        m.appendTail(buf);
+        s = buf.toString();
+
+        s = validateEntities(s);
+        return s;
+    }
+
+    private String validateEntities(final String s) {
+        StringBuffer buf = new StringBuffer();
+
+        // validate entities throughout the string
+        Matcher m = P_VALID_ENTITIES.matcher(s);
+        while (m.find()) {
+            final String one = m.group(1); //([^&;]*)
+            final String two = m.group(2); //(?=(;|&|$))
+            m.appendReplacement(buf, Matcher.quoteReplacement(checkEntity(one, two)));
+        }
+        m.appendTail(buf);
+
+        return encodeQuotes(buf.toString());
+    }
+
+    private String encodeQuotes(final String s){
+        if(encodeQuotes){
+            StringBuffer buf = new StringBuffer();
+            Matcher m = P_VALID_QUOTES.matcher(s);
+            while (m.find()) {
+                final String one = m.group(1); //(>|^)
+                final String two = m.group(2); //([^<]+?)
+                final String three = m.group(3); //(<|$)
+                m.appendReplacement(buf, Matcher.quoteReplacement(one + regexReplace(P_QUOTE, "&quot;", two) + three));
+            }
+            m.appendTail(buf);
+            return buf.toString();
+        }else{
+            return s;
+        }
+    }
+
+    private String checkEntity(final String preamble, final String term) {
+
+        return ";".equals(term) && isValidEntity(preamble)
+                ? '&' + preamble
+                : "&amp;" + preamble;
+    }
+
+    private boolean isValidEntity(final String entity) {
+        return inArray(entity, vAllowedEntities);
+    }
+
+    private static boolean inArray(final String s, final String[] array) {
+        for (String item : array) {
+            if (item != null && item.equals(s)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    private boolean allowed(final String name) {
+        return (vAllowed.isEmpty() || vAllowed.containsKey(name)) && !inArray(name, vDisallowed);
+    }
+
+    private boolean allowedAttribute(final String name, final String paramName) {
+        return allowed(name) && (vAllowed.isEmpty() || vAllowed.get(name).contains(paramName));
+    }
+}

src/cn/com/usky/filter/XssEncode.java

@@ -0,0 +1,22 @@
+package cn.com.usky.filter;
+
+
+
+public class XssEncode {
+    public static String xssEncode(String s) {
+        if (s == null || s.isEmpty()) {
+            return s;
+        }
+        try {
+            HTMLFilter htmlFilter = new HTMLFilter();
+            String clean = htmlFilter.filter(s);
+            return clean;
+        } catch (NullPointerException e) {
+            return s;
+        } catch (Exception ex) {
+            ex.printStackTrace();
+        }
+
+        return null;
+    }
+}

src/cn/com/usky/filter/XssFilter1.java

@@ -0,0 +1,36 @@
+package cn.com.usky.filter;
+
+import java.io.IOException;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.filter.OncePerRequestFilter;
+
+public class XssFilter1 extends OncePerRequestFilter {
+     private final Logger logger = LoggerFactory.getLogger(this.getClass());
+     @Override
+        protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response, FilterChain chain)
+                throws ServletException, IOException {
+            try {
+                String uri = request.getRequestURI();
+                //特殊url不走过滤器
+                if (uri.contains("receipt") || uri.contains("mobile/buildingMgr")
+                         || uri.contains("bestPay") || uri.contains("backNotify") || uri.contains("frontNotify")
+                         || uri.contains("queryOrder") || uri.contains("refundNotify") || uri.contains("refund")
+                         || uri.contains("reverse")) {
+                    chain.doFilter(request, response);
+                } else {
+                    XssHttpServletRequestWrapper xssRequest = new XssHttpServletRequestWrapper((HttpServletRequest) request);
+                    chain.doFilter(xssRequest, response);
+                }
+            } catch (Exception e) {
+                logger.error("Xss过滤器，包装request对象失败");
+                chain.doFilter(request, response);
+            }
+        }
+}

src/cn/com/usky/filter/XssHttpServletRequestWrapper.java

@@ -0,0 +1,100 @@
+package cn.com.usky.filter;
+
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletRequestWrapper;
+
+public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
+
+    HttpServletRequest orgRequest = null;
+
+    public XssHttpServletRequestWrapper(HttpServletRequest request) {
+        super(request);
+        orgRequest = request;
+    }
+
+    /**
+     * 覆盖getParameter方法，将参数名和参数值都做xss过滤
+     */
+    @Override
+    public String getParameter(String name) {
+        String value = super.getParameter(xssEncode(name));
+        if (value != null) {
+            value = xssEncode(value);
+        }
+        return value;
+    }
+    /**
+     * 覆盖getParameterValues方法，将参数名和参数值都做xss过滤
+     */
+    public String[] getParameterValues(String parameter) {
+        String[] values = super.getParameterValues(parameter);
+        if (values==null)  {
+            return null;
+        }
+        int count = values.length;
+        String[] encodedValues = new String[count];
+        for (int i = 0; i < count; i++) {
+            encodedValues[i] = xssEncode(values[i]);
+        }
+        return encodedValues;
+    }
+
+    /**
+     * 获取request的属性时，做xss过滤
+     */
+     @Override
+    public Object getAttribute(String name) {
+        Object value = super.getAttribute(name);
+        if (null != value && value instanceof String) {
+            value = xssEncode((String) value);
+        }
+        return value;
+    };
+
+    /**
+     * 覆盖getHeader方法，将参数名和参数值都做xss过滤。<br/>
+     */
+    @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) {
+        return XssEncode.xssEncode(s);
+    }
+
+    /**
+     * 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 XssHttpServletRequestWrapper) {
+            return ((XssHttpServletRequestWrapper) req).getOrgRequest();
+        }
+
+        return req;
+    }
+
+
+}