gateway网关与前端请求跨域问题的解决方案

spring:
  application:
    name: service-getway
  cloud:
    gateway:
      globalcors:
        cors-configurations:
          '[/**]':
            # 允许携带认证信息
            # 允许跨域的源(网站域名/ip)，设置*为全部
            # 允许跨域请求里的head字段，设置*为全部
            # 允许跨域的method， 默认为GET和OPTIONS，设置*为全部
            # 跨域允许的有效期
            allow-credentials: true
            allowed-originPatterns: "*"
            allowed-headers: "*"
            allowed-methods:
              - OPTIONS
              - GET
              - POST
            max-age: 3600

public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
        HttpServletResponse res = (HttpServletResponse)response;
        HttpServletRequest req = (HttpServletRequest)request;
        res.setHeader("Access-Control-Allow-Origin", req.getHeader("Origin"));
        res.setHeader("Access-Control-Allow-Methods", "GET,POST,OPTIONS,PUT,DELETE");
        res.setHeader("Access-Control-Max-Age", "3600");
        res.setHeader("Access-Control-Allow-Headers", req.getHeader("Access-Control-Request-Headers"));
        res.setHeader("Access-Control-Allow-Credentials", "true");
        if (req.getMethod().equals(RequestMethod.OPTIONS.name())) {
            res.setStatus(HttpStatus.OK.value());
        } else {
            filterChain.doFilter(request, response);
        }
    }

@Configuration
public class WebFilterConfig {
    @Bean
    public FilterRegistrationBean webCrossFilterRegistration() {
        FilterRegistrationBean registration = new FilterRegistrationBean();
        registration.setFilter(new WebCrossFilter());
        registration.addUrlPatterns("/**");
        registration.addInitParameter("paramName", "paramValue");
        registration.setName("webCrossFilter");
        return registration;
    }
}

spring:
  application:
    name: app-gateway
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    gateway:
      globalcors:
        corsConfigurations:
          '[/**]':
            allowedHeaders: "*"
            allowedOrigins: "*"
            allowCredentials: true
            allowedMethods:
              - GET
              - POST
              - DELETE
              - PUT
              - OPTION