package com.huimv.gateway.config;

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpMethod;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.DefaultCorsProcessor;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.util.pattern.PathPatternParser;


import java.util.Collections;

/**
 * @Project : huimv.shiwan
 * @Package : com.huimv.gateway.config
 * @Description : TODO
 * @Author : yuxuexuan
 * @Create : 2021/4/28 0028 15:45
 **/
@Configuration
public class GatewayCrosConfig {
//    @Bean
//    public CorsWebFilter corsWebFilter(){
//
//        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
//        CorsConfiguration corsConfiguration = new CorsConfiguration();
//        //1.配置跨域
//        corsConfiguration.addAllowedHeader("*");
//        corsConfiguration.addAllowedMethod("*");
////        corsConfiguration.addAllowedOrigin("*");
//        corsConfiguration.setAllowedOriginPatterns(Collections.singletonList("*"));
//        corsConfiguration.setAllowCredentials(true);
//
//
//        source.registerCorsConfiguration("/**",corsConfiguration);
//        return new CorsWebFilter(source);
//    }


    @Bean
    public CorsResponseHeaderFilter corsResponseHeaderFilter() {
        return new CorsResponseHeaderFilter();
    }

    @Bean
    public CorsWebFilter corsFilter() {
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", buildCorsConfiguration());

        CorsWebFilter corsWebFilter = new CorsWebFilter(source, new DefaultCorsProcessor() {
            @Override
            protected boolean handleInternal(ServerWebExchange exchange, CorsConfiguration config,
                                             boolean preFlightRequest)
            {
                // 预留扩展点
                // if (exchange.getRequest().getMethod() == HttpMethod.OPTIONS) {
                return super.handleInternal(exchange, config, preFlightRequest);
                // }

                // return true;
            }
        });

        return corsWebFilter;
    }

    private CorsConfiguration buildCorsConfiguration() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        corsConfiguration.setAllowedOriginPatterns(Collections.singletonList("*"));
        //corsConfiguration.addAllowedOrigin("*");

        corsConfiguration.addAllowedMethod(HttpMethod.OPTIONS);
        corsConfiguration.addAllowedMethod(HttpMethod.POST);
        corsConfiguration.addAllowedMethod(HttpMethod.GET);
        corsConfiguration.addAllowedMethod(HttpMethod.PUT);
        corsConfiguration.addAllowedMethod(HttpMethod.DELETE);
        corsConfiguration.addAllowedMethod(HttpMethod.PATCH);
        // corsConfiguration.addAllowedMethod("*");
        corsConfiguration.addAllowedHeader("*");

        corsConfiguration.setMaxAge(7200L);
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }



}