Spring Cloud (6) | spring cloud zuul 跨域问题No 'Access-Control-Allow-Origin' header

在用spring cloud zuul做Filter的时候，访问微服务出现跨域问题，在网上找了很多办法：

zuul:
  ignored-headers: Access-Control-Allow-Credentials, Access-Control-Allow-Origin

参照：https://github.com/spring-cloud/spring-cloud-netflix/issues/1250
这个，发现还是没解决问题，

方法1
于是在Filter里面改代码解决了问题：
CloudFilter.java

@Component
public class CloudFilter extends ZuulFilter {

@Override
public String filterType() {
return "pre";
    }

@Override
public int filterOrder() {
return 0;
    }

@Override
public boolean shouldFilter() {
return true;
    }

@Override
public Object run() {
        RequestContext ctx = RequestContext.getCurrentContext();

            HttpServletResponse response = ctx.getResponse();
            response.addHeader("Access-Control-Allow-Origin", "*");
            response.setContentType("application/json");
            response.setCharacterEncoding("UTF-8");
            response.setContentType("text/html;charset=UTF-8");
}

}

方法2
在@EnableZuulProxy注解里的Class类加入下面这个Bean:
用到CorsFilter这个类，需要import org.springframework.web.filter.CorsFilter;

    @Bean
public CorsFilter corsFilter() {
final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
final CorsConfiguration config = new CorsConfiguration();
        config.setAllowCredentials(true);
        config.addAllowedOrigin("*");
        config.addAllowedHeader("*");
        config.addAllowedMethod("OPTIONS");
        config.addAllowedMethod("HEAD");
        config.addAllowedMethod("GET");
        config.addAllowedMethod("PUT");
        config.addAllowedMethod("POST");
        config.addAllowedMethod("DELETE");
        config.addAllowedMethod("PATCH");
        source.registerCorsConfiguration("/**", config);
return new CorsFilter(source);
    }

参照：https://*.com/questions/28670640/spring-cloud-zuul-proxy-is-producing-a-no-access-control-allow-origin-ajax-r

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Spring Cloud (6) | spring cloud zuul 跨域问题No 'Access-Control-Allow-Origin' header

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