正常情况下,跨域是这样的: 1. 微服务配置跨域+zuul不配置=有跨域问题 2. 微服务配置+zuul配置=有跨域问题 3. 微服务不配置+zuul不配置=有跨域问题 4. 微服务不配置+zuul配置=ok 然而云环境中每个服务自己有跨域解决方案,而网关需要做最外层的跨域解决方案.如果服务已有跨域配置网关也有,会出现*多次配置问题。
Access-Control-Allow-Origin:"*,*"
也就是multiple Access-Control-Allow-Origin
!!!所以我们就要,微服务配置+zuul配置=解决跨域问题
zuul的跨域忽略配置 使用ZUUL配置忽略头部信息
zuul:
#需要忽略的头部信息,不在传播到其他服务
sensitive-headers: Access-Control-Allow-Origin
ignored-headers: Access-Control-Allow-Origin,H-APP-Id,Token,APPToken
微服务应用的跨域配置
@Component
public class CorsFilter implements Filter {
@Override
public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) req;
HttpServletResponse response = (HttpServletResponse) res;
/* String curOrigin = request.getHeader("Origin");
System.out.println("###跨域过滤器->当前访问来源->"+curOrigin+"###"); */
response.setHeader("Access-Control-Allow-Origin", "*");
response.setHeader("Access-Control-Allow-Methods", "*");
response.setHeader("Access-Control-Max-Age", "3600");
response.setHeader("Access-Control-Allow-Headers", "x-requested-with");
chain.doFilter(req, res);
}
@Override
public void init(FilterConfig filterConfig) {}
@Override
public void destroy() {}
}
zuul路由的跨域配置
@Component
@Configuration
public class GateWayCorsConfig
{
@Bean
public CorsFilter corsFilter() {
final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
final CorsConfiguration corsConfiguration = new CorsConfiguration();
// corsConfiguration.setAllowCredentials(true);
corsConfiguration.addAllowedHeader("*");
corsConfiguration.addAllowedOrigin("*");
corsConfiguration.addAllowedMethod("*");
source.registerCorsConfiguration("/**", corsConfiguration);
return new CorsFilter(source);
}
}