url参数script注入攻击 防御

package net.survey.util;

import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

/**
 * 处理非法字符
 *
 * @author   wuruihua
 * @myblog http://blog.sina.com.cn/ruihuawu
 * @create    2016年5月19日
 */
public class XssShieldUtil {

    private static List<Pattern> patterns = null;

    private static List<Object[]> getXssPatternList() {
        List<Object[]> ret = new ArrayList<Object[]>();

        ret.add(new Object[]{"<(no)?script[^>]*>.*?</(no)?script>", Pattern.CASE_INSENSITIVE});
        ret.add(new Object[]{"eval\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL});
        ret.add(new Object[]{"expression\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL});
        ret.add(new Object[]{"(javascript:|vbscript:|view-source:)*", Pattern.CASE_INSENSITIVE});
        ret.add(new Object[]{"<(\"[^\"]*\"|\'[^\']*\'|[^\'\">])*>", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL});
        ret.add(new Object[]{"(window\\.location|window\\.|\\.location|document\\.cookie|document\\.|alert\\(.*?\\)|window\\.open\\()*", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL});
        ret.add(new Object[]{"<+\\s*\\w*\\s*(oncontrolselect|oncopy|oncut|ondataavailable|ondatasetchanged|ondatasetcomplete|ondblclick|ondeactivate|ondrag|ondragend|ondragenter|ondragleave|ondragover|ondragstart|ondrop|onerror=|onerroupdate|onfilterchange|onfinish|onfocus|onfocusin|onfocusout|onhelp|onkeydown|onkeypress|onkeyup|onlayoutcomplete|onload|onlosecapture|onmousedown|onmouseenter|onmouseleave|onmousemove|onmousout|onmouseover|onmouseup|onmousewheel|onmove|onmoveend|onmovestart|onabort|onactivate|onafterprint|onafterupdate|onbefore|onbeforeactivate|onbeforecopy|onbeforecut|onbeforedeactivate|onbeforeeditocus|onbeforepaste|onbeforeprint|onbeforeunload|onbeforeupdate|onblur|onbounce|oncellchange|onchange|onclick|oncontextmenu|onpaste|onpropertychange|onreadystatechange|onreset|onresize|onresizend|onresizestart|onrowenter|onrowexit|onrowsdelete|onrowsinserted|onscroll|onselect|onselectionchange|onselectstart|onstart|onstop|onsubmit|onunload)+\\s*=+", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL});
        return ret;
    }

    private static List<Pattern> getPatterns() {

        if (patterns == null) {

            List<Pattern> list = new ArrayList<Pattern>();

            String regex = null;
            Integer flag = null;
            int arrLength = 0;

            for(Object[] arr : getXssPatternList()) {
                arrLength = arr.length;
                for(int i = 0; i < arrLength; i++) {
                    regex = (String)arr[0];
                    flag = (Integer)arr[1];
                    list.add(Pattern.compile(regex, flag));
                }
            }

            patterns = list;
        }

        return patterns;
    }

    public static String stripXss(String value) {
        if(StringUtils.isNotBlank(value)) {

            Matcher matcher = null;

            for(Pattern pattern : getPatterns()) {
                matcher = pattern.matcher(value);
                // 匹配
                if(matcher.find()) {
                    // 删除相关字符串
                    value = matcher.replaceAll("");
                }
            }

            value = value.replaceAll("<", "&lt;").replaceAll(">", "&gt;");
        }

        return value;
    }
    public static boolean stripXSS(String value) {
        boolean result = false;
        if (value != null) {

            // Avoid null characters
            value = value.replaceAll("", "");

            // Avoid anything between script tags
            Pattern scriptPattern = Pattern.compile("<script>(.*?)</script>", Pattern.CASE_INSENSITIVE);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            // //如果找到则为true
            if (result)
                return result;

            // Avoid anything in a src='...' type of expression
            scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            // Remove any lonesome </script> tag
            scriptPattern = Pattern.compile("</script>", Pattern.CASE_INSENSITIVE);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            // Remove any lonesome <script ...> tag
            scriptPattern = Pattern.compile("<script(.*?)>",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            // Avoid eval(...) expressions
            scriptPattern = Pattern.compile("eval\\((.*?)\\)",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            // Avoid expression(...) expressions
            scriptPattern = Pattern.compile("expression\\((.*?)\\)",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            scriptPattern = Pattern.compile("vbscript:", Pattern.CASE_INSENSITIVE);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            // Avoid onload= expressions
            scriptPattern = Pattern.compile("onload(.*?)=",
                    Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;

            // Avoid alert:... expressions
            scriptPattern = Pattern.compile("alert", Pattern.CASE_INSENSITIVE);
            result = scriptPattern.matcher(value).find();// .replaceAll("");
            if (result)
                return result;
        }
        return result;
    }

}