详解SpringCloudZuul网关修改为短连接方法

        //设置请求为短连接
        ctx.addZuulRequestHeader("connection", "close");

public boolean isIncludedHeader(String headerName) {
		String name = headerName.toLowerCase();
		RequestContext ctx = RequestContext.getCurrentContext();
		if (ctx.containsKey(IGNORED_HEADERS)) {
			Object object = ctx.get(IGNORED_HEADERS);
			if (object instanceof Collection && ((Collection<?>) object).contains(name)) {
				return false;
			}
		}
		switch (name) {
		case "host":
			if(addHostHeader) {
				return true;
			}
		case "connection":
		case "content-length":
		case "server":
		case "transfer-encoding":
		case "x-application-context":
			return false;
		default:
			return true;
		}
	}

@Component
public class CustomZuulConfig {

    @Autowired
    ZuulProperties zuulProperties;

    @Value("${servletPath}")
    private String servletPath;

    @Bean
    public CustomRouteLocator routeLocator() {
        CustomRouteLocator routeLocator = new CustomRouteLocator(servletPath, this.zuulProperties);
        return routeLocator;
    }

}

public class CustomRequestHelper extends ProxyRequestHelper {
    @Override
    public boolean isIncludedHeader(String headerName) {
        String name = headerName.toLowerCase();
        RequestContext ctx = RequestContext.getCurrentContext();
        if (ctx.containsKey(IGNORED_HEADERS)) {
            Object object = ctx.get(IGNORED_HEADERS);
            if (object instanceof Collection && ((Collection<?>)object).contains(name)) {
                return false;
            }
        }
        switch (name) {
            case "content-length":
            case "host":
            case "server":
            case "transfer-encoding":
            case "x-application-context":
                return false;
            default:
                return true;
        }
    }
} 

@Configuration
@EnableZuulProxy
public class CustomZuulProxyConfig extends ZuulProxyAutoConfiguration {

    @Bean
    @Override
    public SimpleHostRoutingFilter simpleHostRoutingFilter(ProxyRequestHelper helper, ZuulProperties zuulProperties,
            ApacheHttpClientConnectionManagerFactory connectionManagerFactory,
            ApacheHttpClientFactory httpClientFactory) {
        CustomRequestHelper customRequestHelper = new CustomRequestHelper();
        return new SimpleHostRoutingFilter(customRequestHelper, zuulProperties, connectionManagerFactory,
                httpClientFactory);
    }

}