标签:xss return String value values 防止 Override public
HttpServletRequestWrapper封装了厂商的Request实现类
public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper {
public XssHttpServletRequestWrapper(HttpServletRequest request) {
super(request);
}
@Override
public String getParameter(String name) {
String value = super.getParameter(name);
if (!StrUtil.hasEmpty(value)) {
//转义,即去除html标签
value = HtmlUtil.filter(value);
}
return value;
}
@Override
public String[] getParameterValues(String name) {
String[] values = super.getParameterValues(name);
if (values != null) {
for (int i = 0; i < values.length; i++) {
String value = values[i];
if (!StrUtil.hasEmpty(value)) {
value = HtmlUtil.filter(value);
}
values[i] = value;
}
}
return values;
}
@Override
public Map<String, String[]> getParameterMap() {
Map<String, String[]> parameters = super.getParameterMap();
LinkedHashMap<String, String[]> map = new LinkedHashMap<>();
if (parameters != null) {
for (String key : parameters.keySet()) {
String[] values = parameters.get(key);
for (int i = 0; i < values.length; i++) {
String value = values[i];
if (!StrUtil.hasEmpty(value)) {
value = HtmlUtil.filter(value);
}
values[i] = value;
}
map.put(key, values);
}
}
return map;
}
@Override
public String getHeader(String name) {
String value = super.getHeader(name);
if (!StrUtil.hasEmpty(value)) {
value = HtmlUtil.filter(value);
}
return value;
}
@Override
public ServletInputStream getInputStream() throws IOException {
InputStream in = super.getInputStream();
InputStreamReader reader = new InputStreamReader(in, Charset.forName("UTF-8"));
BufferedReader buffer = new BufferedReader(reader);
StringBuffer body = new StringBuffer();
String line = buffer.readLine();
while (line != null) {
body.append(line);
line = buffer.readLine();
}
buffer.close();
reader.close();
in.close();
//json转换为map对象
Map<String, Object> map = JSONUtil.parseObj(body.toString());
Map<String, Object> result = new LinkedHashMap<>();
for (String key : map.keySet()) {
Object val = map.get(key);
if (val instanceof String) {
if (!StrUtil.hasEmpty(val.toString())) {
result.put(key, HtmlUtil.filter(val.toString()));
}
} else {
result.put(key, val);
}
}
String json = JSONUtil.toJsonStr(result);
ByteArrayInputStream bain = new ByteArrayInputStream(json.getBytes());
return new ServletInputStream() {
@Override
public boolean isFinished() {
return false;
}
@Override
public boolean isReady() {
return false;
}
@Override
public void setReadListener(ReadListener readListener) {
}
@Override
public int read() throws IOException {
return bain.read();
}
};
}
}
在filter里调用封装
@WebFilter(urlPatterns = "/*")
public class XssFilter implements Filter {
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
XssHttpServletRequestWrapper wrapper = new XssHttpServletRequestWrapper((HttpServletRequest) servletRequest);
filterChain.doFilter(wrapper, servletResponse);
}
@Override
public void destroy() {
}
}
标签:xss,return,String,value,values,防止,Override,public 来源: https://www.cnblogs.com/xuloveforever/p/15214236.html
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