Spring-Boot v2.0.5 设置跨域访问

本文详细介绍了如何在SpringBoot项目中使用@Configuration注解下的类来配置跨域请求(CORS)。通过实例展示了如何指定允许跨域的URL路径及前端域名,帮助开发者解决前后端分离项目中的跨域问题。

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在@Configuration注解下的类中添加如下配置

@Bean
public WebMvcConfigurer corsConfigurer() {
	return new WebMvcConfigurerAdapter() {
		@Override
		public void addCorsMappings(CorsRegistry registry) {
			registry.addMapping("/some-controller-you-want-to-CORS").allowedOrigins("http://your.front.end.domain.name:your-port");
     	}
	};
}

例如:

@SpringBootApplication
@Configuration
public class CrowdsourcingExampleBackEndApplication {

    public static void main(String[] args) {
        SpringApplication app = new SpringApplication(CrowdsourcingExampleBackEndApplication.class);
        app.setWebApplicationType(WebApplicationType.SERVLET);
        app.run(args);
    }

    @Bean
    public WebMvcConfigurer corsConfigurer() {
        return new WebMvcConfigurerAdapter() {
            @Override
            public void addCorsMappings(CorsRegistry registry) {
                registry.addMapping("/**").allowedOrigins("http://localhost:8080");
            }
        };
    }
}
package com.bolt.gateway.config; import com.bolt.gateway.handler.HystrixFallbackHandler; import com.bolt.gateway.props.AuthProperties; import com.bolt.gateway.props.RouteProperties; import lombok.AllArgsConstructor; import lombok.extern.slf4j.Slf4j; import org.springframework.boot.context.properties.EnableConfigurationProperties; 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.MediaType; 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.filter.reactive.HiddenHttpMethodFilter; import org.springframework.web.reactive.function.server.RequestPredicates; import org.springframework.web.reactive.function.server.RouterFunction; import org.springframework.web.reactive.function.server.RouterFunctions; import org.springframework.web.server.ServerWebExchange; import org.springframework.web.server.WebFilter; import org.springframework.web.server.WebFilterChain; import reactor.core.publisher.Mono; /** * 路由配置信息 * * @author arch_group */ @Slf4j @Configuration @AllArgsConstructor @EnableConfigurationProperties({RouteProperties.class, AuthProperties.class}) public class RouterFunctionConfiguration { /** * 这里为支持的请求头,如果有自定义的header字段请自己添加 */ private static final String ALLOWED_HEADERS = "x-requested-with, zkpt-ks-auth, Content-Type, Authorization, credential, X-XSRF-TOKEN, token, username, client"; private static final String ALLOWED_METHODS = "*"; private static final String ALLOWED_ORIGIN = "*"; private static final String ALLOWED_EXPOSE = "*"; private static final String MAX_AGE = "18000L"; private final HystrixFallbackHandler hystrixFallbackHandler; @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", "true"); if (request.getMethod() == HttpMethod.OPTIONS) { response.setStatusCode(HttpStatus.OK); return Mono.empty(); } } return chain.filter(ctx); }; } @Bean public RouterFunction routerFunction() { return RouterFunctions.route( RequestPredicates.path("/fallback") .and(RequestPredicates.accept(MediaType.TEXT_PLAIN)), hystrixFallbackHandler); } /** * 解决springboot2.0.5版本出现的 Only one connection receive subscriber allowed. * 参考:https://github.com/spring-cloud/spring-cloud-gateway/issues/541 */ @Bean public HiddenHttpMethodFilter hiddenHttpMethodFilter() { return new HiddenHttpMethodFilter() { @Override public Mono<Void> filter(ServerWebExchange exchange, WebFilterChain chain) { return chain.filter(exchange); } }; } }
07-14
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