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2024-12-16 7ea8d1c6da749da69516f47593ae47546a0d3d4c

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package com.jilongda.common.config;
 
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.UrlBasedCorsConfigurationSource;
import org.springframework.web.cors.reactive.CorsUtils;
import org.springframework.web.filter.CorsFilter;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;
import reactor.core.publisher.Mono;
 
import java.util.Collections;
 
/**
 * 实现基本的跨域请求
 * 2.4.0 通多配置
 *
 * @author xiaochen
 * @Override public void addCorsMappings(CorsRegistry registry) {
 * registry.addMapping("/**")
 * // SpringBoot2.4.0 [allowedOriginPatterns]代替[allowedOrigins]
 * .allowedOriginPatterns("*")
 * .allowedMethods("*")
 * .maxAge(3600)
 * .allowCredentials(true);
 * }
 */
@Configuration
public class CorsConfig {
 
    private static final String ALLOWED_HEADERS = "X-Requested-With, Content-Type, Authorization, credential, X-XSRF-TOKEN, token, username, client, request-origion";
    private static final String ALLOWED_METHODS = "GET,POST,PUT,DELETE";
    private static final String ALLOWED_ORIGIN = "*";
    private static final String ALLOWED_EXPOSE = "*";
    private static final String MAX_AGE = "18000L";
 
    private CorsConfiguration buildConfig() {
        CorsConfiguration corsConfiguration = new CorsConfiguration();
        //1.允许任何来源
        corsConfiguration.setAllowedOriginPatterns(Collections.singletonList("*"));
        //2.允许任何请求头
        corsConfiguration.addAllowedHeader(CorsConfiguration.ALL);
        //3.允许任何方法
        corsConfiguration.addAllowedMethod(CorsConfiguration.ALL);
        //4.允许凭证
        corsConfiguration.setAllowCredentials(true);
        return corsConfiguration;
    }
 
    @Bean
    public WebFilter corsFilter() {
        return (ServerWebExchange ctx, WebFilterChain chain) -> {
            ServerHttpRequest request = ctx.getRequest();
            if (CorsUtils.isCorsRequest(request))
            {
                ServerHttpResponse response = ctx.getResponse();
                HttpHeaders headers = response.getHeaders();
                headers.add("Access-Control-Allow-Headers", ALLOWED_HEADERS);
                headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS);
                headers.add("Access-Control-Allow-Origin", ALLOWED_ORIGIN);
                headers.add("Access-Control-Expose-Headers", ALLOWED_EXPOSE);
                headers.add("Access-Control-Max-Age", MAX_AGE);
                headers.add("Access-Control-Allow-Credentials", "false");
                if (request.getMethod() == HttpMethod.OPTIONS)
                {
                    response.setStatusCode(HttpStatus.OK);
                    return Mono.empty();
                }
            }
            return chain.filter(ctx);
        };
    }
 
}