Spring cloud zuul跨域（二）

使用  CorsFilter  解决ajax跨域问题

直接在zuul的main下面，创建corsFilter就可以了。

@SpringBootApplication
@EnableZuulProxy
@EnableFeignClients
@ComponentScan(basePackages={"xxx"},lazyInit=true)
@ServletComponentScan(basePackages={"xxx"})
public class ZuulApp
{
    public static void main( String[] args )
    {
        SpringApplication.run(ZuulApp.class, args);

    }

    @Bean
    public CorsFilter corsFilter() {
        final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
        final CorsConfiguration config = new CorsConfiguration();
        //允许跨域
        config.setAllowCredentials(true);
        //允许向该服务器提交请求的URI,*表示全部
        config.addAllowedOrigin("*");
        //允许访问的头信息,*表示全部
        config.addAllowedHeader("*");
        //允许的method
        config.addAllowedMethod("OPTIONS");
        config.addAllowedMethod("HEAD");
        config.addAllowedMethod("GET");
        config.addAllowedMethod("PUT");
        config.addAllowedMethod("POST");
        config.addAllowedMethod("DELETE");
        config.addAllowedMethod("PATCH");
        //免检时间,单位是秒
        //config.setMaxAge(3600)
        //Enabling CORS for the whole application
        source.registerCorsConfiguration("/**", config);
        return new CorsFilter(source);
    }

}

这里看一下 prefilter 和 postfilter

@Component
public class PreFilter extends ZuulFilter {
    public PreFilter() {
        super();
    }

    @Override
    public String filterType() {
        return FilterConstants.PRE_TYPE;
    }

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

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

    @Override
    public Object run() {

        RequestContext ctx = RequestContext.getCurrentContext();
        HttpServletRequest request = ctx.getRequest();

        String requestUrl = request.getRequestURL().toString();
        String requestUri = request.getRequestURI();
        String zuul = requestUrl.substring(0,requestUrl.indexOf(requestUri)); // zuul根路径
        ctx.addZuulRequestHeader("zuul", zuul);

        return null;
    }

}

@Component
public class PostFilter extends ZuulFilter {
    protected static final String SEND_ERROR_FILTER_RAN = "sendErrorFilter.ran";

    @Override
    public String filterType() {
        return FilterConstants.POST_TYPE;
    }

    @Override
    public int filterOrder() {
        return -1;
    }

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

    @Override
    public Object run() {

        return null;
    }
}

结束语：解决了跨域和网页提交问题。但是https访问据说会出现问题，我还没有测试