Springboot2.0防止XSS攻击的几种方式

系统管理员 2023-09-25 20:18 40阅读 0赞

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Springboot2.0防止XSS攻击的几种方式  
在平时做项目代码开发的时候，很容易忽视XSS攻击的防护，网上有很多自定义全局拦截器来实现XSS过滤，其实不需要这么麻烦，SpringBoot留有不少钩子（扩展点），据此我们可以巧妙地实现全局的XSS过滤

防止XSS攻击，一般有两种做法:

1. 转义

使用工具类HtmlUtils实现

2. 过滤

将敏感标签去除  
jsoup实现了非常强大的clean敏感标签的功能

转义 做法的三种实现：

转义方法一：注册自定义转换器

自定义转换器，集成PropertyEditorSupport类实现，转换器还可以实现数据格式转换，例如：date的转换；

@Component
    public class DateEditor extends PropertyEditorSupport {Pattern pattern = Pattern.compile("[^0-9]");@Overridepublic void setAsText(String text) throws IllegalArgumentException {if (StrUtil.isBlank(text)) {return;}text = text.trim();Matcher matcher = pattern.matcher(text);text = matcher.replaceAll("");int length = text.length();Date date;switch (length) {case 14:date = DateTime.parse(text, DateTimeFormat.forPattern("yyyyMMddHHmmss")).toDate();break;case 12:date = DateTime.parse(text, DateTimeFormat.forPattern("yyyyMMddHHmm")).toDate();break;case 10:date = DateTime.parse(text, DateTimeFormat.forPattern("yyyyMMddHH")).toDate();break;case 8:date = DateTime.parse(text, DateTimeFormat.forPattern("yyyyMMdd")).toDate();break;case 6:date = DateTime.parse(text, DateTimeFormat.forPattern("yyyyMM")).toDate();break;case 4:date = DateTime.parse(text, DateTimeFormat.forPattern("yyyy")).toDate();break;default:return;}setValue(date);}
    }

@Component
    public class StringEscapeEditor extends PropertyEditorSupport {public StringEscapeEditor() {super();}@Overridepublic String getAsText() {Object value = getValue();return value != null ? value.toString() : "";}@Overridepublic void setAsText(String text) {if (text == null) {setValue(null);} else {String value = text;value = value.trim();setValue(value);}}
    }

@Slf4j
    @Component
    public class CommentWebBindingInitializer extends ConfigurableWebBindingInitializer {private final StringEscapeEditor stringEscapeEditor;private final DateEditor dateEditor;@Autowiredpublic CommentWebBindingInitializer(StringEscapeEditor stringEscapeEditor, DateEditor dateEditor) {this.stringEscapeEditor = stringEscapeEditor;this.dateEditor = dateEditor;}@Overridepublic void initBinder(WebDataBinder binder) {log.info("init bind editor");super.initBinder(binder);// 注册自定义的类型转换器binder.registerCustomEditor(Date.class, dateEditor);binder.registerCustomEditor(String.class, stringEscapeEditor);}
    }

转义方法二：BaseController

需要XSS防护的Controller的需要继承该BaseController

public class BaseController {@Autowiredprivate StringEscapeEditor stringEscapeEditor;@InitBinderpublic void initBinder(ServletRequestDataBinder binder) {binder.registerCustomEditor(String.class, stringEscapeEditor);}
    }

转义方法三：Converter

@Component
    public class StringEscapeEditor implements Converter<String, String> {@Overridepublic String convert(String s) {return StringUtils.isEmpty(s) ? s : HtmlUtils.htmlEscape(s);}}

@Configuration
    public class WebMvcConfig implements WebMvcConfigurer {@Autowiredprivate LoginInterceptor loginInterceptor;@Autowiredprivate StringEscapeEditor stringEscapeEditor;/*** 在参数绑定时，自定义String->String的转换器，* 在转换逻辑中对参数值进行转义，从而达到防XSS的效果** @param registry*/@Overridepublic void addFormatters(FormatterRegistry registry) {registry.addConverter(StringEscapeEditor);}@Overridepublic void addInterceptors(InterceptorRegistry registry) {registry.addInterceptor(loginInterceptor).addPathPatterns("/**")// 路径不包括contextPath部分.excludePathPatterns("/user/login", "/user/logout", "/index/test1");}/*** 前后端分离需要解决跨域问题** @param registry*/@Overridepublic void addCorsMappings(CorsRegistry registry) {registry.addMapping("/**").allowedOrigins("*").allowedMethods("GET", "POST", "PUT", "OPTIONS", "DELETE", "PATCH").allowCredentials(true).maxAge(3600);}
    }

过滤做法参考链接：  
使用jsoup方式： jsoup

转载链接：https://blog.csdn.net/changzhi9421/article/details/121693397