在春季 5 中启用 CORS Webflux？

我成功使用了这个自定义过滤器：

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.reactive.CorsUtils;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebFilter;
import org.springframework.web.server.WebFilterChain;

import reactor.core.publisher.Mono;


@Configuration
public class CorsConfiguration {

  private static final String ALLOWED_HEADERS = "x-requested-with, authorization, Content-Type, Authorization, credential, X-XSRF-TOKEN";
  private static final String ALLOWED_METHODS = "GET, PUT, POST, DELETE, OPTIONS";
  private static final String ALLOWED_ORIGIN = "*";
  private static final String MAX_AGE = "3600";

  @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-Origin", ALLOWED_ORIGIN);
        headers.add("Access-Control-Allow-Methods", ALLOWED_METHODS);
        headers.add("Access-Control-Max-Age", MAX_AGE);
        headers.add("Access-Control-Allow-Headers",ALLOWED_HEADERS);
        if (request.getMethod() == HttpMethod.OPTIONS) {
          response.setStatusCode(HttpStatus.OK);
          return Mono.empty();
        }
      }
      return chain.filter(ctx);
    };
  }

}

并且不应作为依赖项包含在内 - 筛选器不与它一起使用。org.springframework.boot:spring-boot-starter-web

这是使用Webflux Configurer的另一个解决方案。

附注：它的 Kotlin Code（从我的项目中复制），但你可以很容易地将其转换为 Java 代码。

@Configuration
@EnableWebFlux
class WebConfig: WebFluxConfigurer
{
    override fun addCorsMappings(registry: CorsRegistry)
    {
        registry.addMapping("/**")
            .allowedOrigins("*") // any host or put domain(s) here
            .allowedMethods("GET, POST") // put the http verbs you want allow
            .allowedHeaders("Authorization") // put the http headers you want allow
    }
}