import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.apache.commons.lang.StringUtils;
public class XssShieldUtil {
private static List<Pattern> patterns = null;
private static List<Object[]> getXssPatternList() {
List<Object[]> ret = new ArrayList<Object[]>();
//如果发现其它的,可以继续增加
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|οnerrοr=|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("<", "<").replaceAll(">", ">");
}
// if (LOG.isDebugEnabled())
// LOG.debug("strip value: " + value);
return value;
}
//
public static void main(String[] args) {
String value = null;
value = XssShieldUtil.stripXss("<script language=text/javascript>alert(document.cookie);</script>");
System.out.println("type-1: '" + value + "'");
value = XssShieldUtil.stripXss("<script src='' οnerrοr='alert(document.cookie)'></script>");
System.out.println("type-2: '" + value + "'");
value = XssShieldUtil.stripXss("</script>");
System.out.println("type-3: '" + value + "'");
value = XssShieldUtil.stripXss(" eval(abc);");
System.out.println("type-4: '" + value + "'");
value = XssShieldUtil.stripXss(" expression(abc);");
System.out.println("type-5: '" + value + "'");
value = XssShieldUtil.stripXss("<img src='' οnerrοr='alert(document.cookie);'></img>");
System.out.println("type-6: '" + value + "'");
value = XssShieldUtil.stripXss("<img src='' οnerrοr='alert(document.cookie);'/>");
System.out.println("type-7: '" + value + "'");
value = XssShieldUtil.stripXss("<img src='' οnerrοr='alert(document.cookie);'>");
System.out.println("type-8: '" + value + "'");
value = XssShieldUtil.stripXss("<script language=text/javascript>alert(document.cookie);");
System.out.println("type-9: '" + value + "'");
value = XssShieldUtil.stripXss("<script>window.location='url'");
System.out.println("type-10: '" + value + "'");
value = XssShieldUtil.stripXss(" οnlοad='alert(\"abc\");");
System.out.println("type-11: '" + value + "'");
value = XssShieldUtil.stripXss("<img src=x<!--'<\"-->>");
System.out.println("type-12: '" + value + "'");
value = XssShieldUtil.stripXss("<=img onstop=");
System.out.println("type-13: '" + value + "'");
value = XssShieldUtil.stripXss("<");
System.out.println("type-1: '" + value + "'");
}
}
使用小例子
//预防xss,进行转义
String phoneValidateCodeXss = XssShieldUtil.stripXss(phoneValidateCode); 本文作者为DBC,转载请注明。