Halo saya tidak bisa masuk besok karena saya di pukulin oleh teman

package pt.impresa.iweb.filters.request; import java.io.IOException; import java.text.Normalizer; import java.util.Collections; import java.util.Enumeration; import java.util.HashMap; import java.util.Map; import java.util.Set; import java.util.regex.Pattern; import javax.servlet.Filter; import javax.servlet.FilterChain; import javax.servlet.FilterConfig; import javax.servlet.ServletException; import javax.servlet.ServletRequest; import javax.servlet.ServletResponse; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletRequestWrapper; /** * Filters Http requests and removes malicious characters/strings * (i.e. XSS) from the Query String */ public class XSSPreventionFilter implements Filter { class XSSRequestWrapper extends HttpServletRequestWrapper { private Map sanitizedQueryString; public XSSRequestWrapper(HttpServletRequest request) { super(request); } //QueryString overrides @Override public String getParameter(String name) { String parameter = null; String[] vals = getParameterMap().get(name); if (vals != null && vals.length > 0) { parameter = vals[0]; } return parameter; } @Override public String[] getParameterValues(String name) { return getParameterMap().get(name); } @Override public Enumeration getParameterNames() { return Collections.enumeration(getParameterMap().keySet()); } @SuppressWarnings("unchecked") @Override public Map getParameterMap() { if(sanitizedQueryString == null) { Map res = new HashMap(); Map originalQueryString = super.getParameterMap(); if(originalQueryString!=null) { for (String key : (Set) originalQueryString.keySet()) { String[] rawVals = originalQueryString.get(key); String[] snzVals = new String[rawVals.length]; for (int i=0; i < rawVals xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed src='...' xss=removed src[\r\n]*=[\r\n]*\\\ xss=removed xss=removed src[\r\n]*=[\r\n]*\\\ xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed xss=removed onload(.*?)=", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(" xss=removed> sanitizedQueryString; public XSSRequestWrapper(HttpServletRequest request) { super(request); } //QueryString overrides @Override public String getParameter(String name) { String parameter = null; String[] vals = getParameterMap().get(name); if (vals != null && vals.length > 0) { parameter = vals[0]; } return parameter; } @Override public String[] getParameterValues(String name) { return getParameterMap().get(name); } @Override public Enumeration getParameterNames() { return Collections.enumeration(getParameterMap().keySet()); } @SuppressWarnings("unchecked") @Override public Map getParameterMap() { if(sanitizedQueryString == null) { Map res = new HashMap(); Map originalQueryString = super.getParameterMap(); if(originalQueryString!=null) { for (String key : (Set) originalQueryString.keySet()) { String[] rawVals = originalQueryString.get(key); String[] snzVals = new String[rawVals.length]; for (int i=0; i < rawVals.length; i++) { snzVals[i] = stripXSS(rawVals[i]); System.out.println("Sanitized: " + rawVals[i] + " to " + snzVals[i]); } res.put(stripXSS(key), snzVals); } } sanitizedQueryString = res; } return sanitizedQueryString; } //TODO: Implement support for headers and cookies (override getHeaders and getCookies) /** * Removes all the potentially malicious characters from a string * @param value the raw string * @return the sanitized string */ private String stripXSS(String value) { String cleanValue = null; if (value != null) { cleanValue = Normalizer.normalize(value, Normalizer.Form.NFD); // Avoid null characters cleanValue = cleanValue.replaceAll("\0", ""); // Avoid anything between script tags Pattern scriptPattern = Pattern.compile("[removed](.*?)[removed]", Pattern.CASE_INSENSITIVE); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Avoid anything in a src='...' type of expression scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\'(.*?)\\\'", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); scriptPattern = Pattern.compile("src[\r\n]*=[\r\n]*\\\"(.*?)\\\"", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Remove any lonesome [removed] tag scriptPattern = Pattern.compile("[removed]", Pattern.CASE_INSENSITIVE); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Remove any lonesome [removed] tag scriptPattern = Pattern.compile("[removed]", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Avoid eval(...) expressions scriptPattern = Pattern.compile("eval\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Avoid [removed]...) expressions scriptPattern = Pattern.compile("expression\\((.*?)\\)", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Avoid [removed]... expressions scriptPattern = Pattern.compile("[removed]", Pattern.CASE_INSENSITIVE); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Avoid [removed]... expressions scriptPattern = Pattern.compile("[removed]", Pattern.CASE_INSENSITIVE); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); // Avoid onload= expressions scriptPattern = Pattern.compile("onload(.*?)=", Pattern.CASE_INSENSITIVE | Pattern.MULTILINE | Pattern.DOTALL); cleanValue = scriptPattern.matcher(cleanValue).replaceAll(""); } return cleanValue; } } @Override public void destroy() { System.out.println("XSSPreventionFilter: destroy()"); } @Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { XSSRequestWrapper wrapper = new XSSRequestWrapper((HttpServletRequest)request); chain.doFilter(wrapper, response); } @Override public void init(FilterConfig filterConfig) throws ServletException { System.out.println("XSSPreventionFilter: init()"); } Saya tidak masuk karena saya sakit'kepala } }

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