springboot springcloud gateway 中的 undertow 禁止接收trace请求（修复漏洞）

1.定义两个类：

CustomHttpHandler.java

import io.undertow.server.HttpHandler;
import io.undertow.server.HttpServerExchange;
import io.undertow.util.StatusCodes;

public class CustomHttpHandler implements HttpHandler {
    private final HttpHandler next;

    public CustomHttpHandler(HttpHandler next) {
        this.next = next;
    }

    @Override
    public void handleRequest(HttpServerExchange exchange) throws Exception {
        if ("TRACE".equals(exchange.getRequestMethod().toString())) {
            exchange.setStatusCode(StatusCodes.FORBIDDEN);
            exchange.endExchange();
            return;
        }
        // 其他处理逻辑
        next.handleRequest(exchange);
    }
}

UndertowConfigCustomizer.java

import org.springframework.boot.web.embedded.undertow.UndertowServletWebServerFactory;
import org.springframework.boot.web.server.WebServerFactoryCustomizer;
import org.springframework.stereotype.Component;

@Component
public class UndertowConfigCustomizer implements WebServerFactoryCustomizer<UndertowServletWebServerFactory> {
    @Override
    public void customize(UndertowServletWebServerFactory factory) {
        factory.addDeploymentInfoCustomizers(deploymentInfo ->
                deploymentInfo.addInitialHandlerChainWrapper(httpHandler -> new CustomHttpHandler(httpHandler))
        );
    }
}

但是对于spring cloud gateway 网关服务 还需要单独定义过滤器，才能修复

DisableTraceFilter.java

import io.netty.handler.codec.http.HttpMethod;
import org.springframework.core.Ordered;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;

@Component
public class DisableTraceFilter implements WebFilter, Ordered {

    @Override
    public int getOrder() {
        // 确保此过滤器优先于其他过滤器
        return Integer.MIN_VALUE;
    }

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) {
        if (HttpMethod.TRACE.name().equals(exchange.getRequest().getMethod().name())) {
            // 返回403禁止访问
            exchange.getResponse().setStatusCode(HttpStatus.FORBIDDEN);
            return exchange.getResponse().setComplete();
        }
        return chain.filter(exchange);
    }
}