springboot 防xss攻击过滤器

maven依赖

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<!-- 防xss攻击 -->
		<dependency>
			<groupId>org.jsoup</groupId>
			<artifactId>jsoup</artifactId>
			<version>1.10.2</version>
		</dependency>

拦截修改请求字段工具类

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/**
 * @Description: xss非法标签过滤
 */
public class XssFilterUtil {
    public static String clean(String content) {
        return Jsoup.clean(content, Whitelist.none());
    }
}

包装类

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/**
 * @Description: 使用HttpServletRequestWrapper重新封装request参数
 */
public class XSSRequestWrapper extends HttpServletRequestWrapper {
    /**
     * 构造方法
     */
    public XSSRequestWrapper(HttpServletRequest request) {
        super(request);
    }

    /**
     * 处理参数值
     */
    @Override
    public String[] getParameterValues(String parameter) {
        String[] values = super.getParameterValues(parameter);
        if (values == null) {
            return null;
        }
        int count = values.length;
        String[] encodedValues = new String[count];
        for (int i = 0; i < count; i++) {
            encodedValues[i] = dealString(values[i]);
        }
        return encodedValues;
    }

    @Override
    public String getParameter(String parameter) {
        String value = super.getParameter(parameter);
        return dealString(value);
    }

    @Override
    public String getHeader(String name) {
        String value = super.getHeader(name);
        return dealString(value);
    }

    /**
     * 字符串处理
     */
    private String dealString(String value) {
        if (value != null) {
            // 采用spring的StringEscapeUtils工具类 实现
            value = XssFilterUtil.clean(value);
        }
        return value;
    }
}

XSS过滤器

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/**
 * @Description: 拦截防止注入漏洞（即防止XSS的跨站脚本攻击）
 */
public class XssFilter implements Filter {
    private FilterConfig filterConfig = null;

    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        filterChain.doFilter(new XssHttpServletRequestWrapper((HttpServletRequest) servletRequest), servletResponse);
    }

    @Override
    public void destroy() {
        this.filterConfig = null;
    }
}

配置过滤器生效地址

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@Configuration
public class FilterConfig {
    @Bean
    public FilterRegistrationBean XssFilter() {
        FilterRegistrationBean registration = new FilterRegistrationBean(new XssFilter());
        registration.addUrlPatterns("/*");
        return registration;
    }
}