package com.dsh.guns.core.xss;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletRequestWrapper;
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public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
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public XssHttpServletRequestWrapper(HttpServletRequest servletRequest) {
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super(servletRequest);
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}
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public String[] getParameterValues(String parameter) {
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String[] values = super.getParameterValues(parameter);
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if (values == null) {
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return null;
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}
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int count = values.length;
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String[] encodedValues = new String[count];
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for (int i = 0; i < count; i++) {
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encodedValues[i] = cleanXSS(values[i]);
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}
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return encodedValues;
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}
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public String getParameter(String parameter) {
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String value = super.getParameter(parameter);
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if (value == null) {
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return null;
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}
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return cleanXSS(value);
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}
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public String getHeader(String name) {
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String value = super.getHeader(name);
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if (value == null)
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return null;
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return cleanXSS(value);
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}
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private String cleanXSS(String value) {
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//You'll need to remove the spaces from the html entities below
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value = value.replaceAll("<", "& lt;").replaceAll(">", "& gt;");
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value = value.replaceAll("\\(", "& #40;").replaceAll("\\)", "& #41;");
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value = value.replaceAll("'", "& #39;");
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value = value.replaceAll("eval\\((.*)\\)", "");
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value = value.replaceAll("[\\\"\\\'][\\s]*javascript:(.*)[\\\"\\\']", "\"\"");
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value = value.replaceAll("script", "");
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return value;
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}
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}
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