跨域问题以及经过网关二次转发重复跨域
1跨域问题解决
package com.win.credit.point.gateway.config;
import java.time.Duration;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.cors.CorsConfiguration;
import org.springframework.web.cors.reactive.CorsWebFilter;
import org.springframework.web.cors.reactive.UrlBasedCorsConfigurationSource;
import org.springframework.web.util.pattern.PathPatternParser;
/**
*/
@Configuration
public class CorsConfig {
@Bean
public CorsWebFilter corsFilter() {
CorsConfiguration config = new CorsConfiguration();
config.addAllowedMethod("*");;
config.addAllowedOrigin("*");
config.addAllowedHeader("*");
config.setMaxAge(Duration.ofHours(24));//options重复请求cache优化
UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
source.registerCorsConfiguration("/**", config);
return new CorsWebFilter(source);
}
}
2有网关一层,网关会转发一次,重复跨域
package com.win.credit.point.gateway.filter;
import java.util.Arrays;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.cloud.gateway.filter.NettyWriteResponseFilter;
import org.springframework.core.Ordered;
import org.springframework.http.HttpHeaders;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
/**
* 重复跨域,去重
*/
@Component("corsResponseHeaderFilter")
public class ResponseCorsHeaderFilter implements GlobalFilter, Ordered {
private static final Logger logger = LoggerFactory.getLogger(ResponseCorsHeaderFilter.class);
@Override
public int getOrder() {
// 指定此过滤器位于NettyWriteResponseFilter之后
// 即待处理完响应体后接着处理响应头
return NettyWriteResponseFilter.WRITE_RESPONSE_FILTER_ORDER + 1000;
}
/**
* Process the Web request and (optionally) delegate to the next {@code WebFilter}
* through the given {@link GatewayFilterChain}.
*
* @param exchange the current server exchange
* @param chain provides a way to delegate to the next filter
* @return {@code Mono<Void>} to indicate when request processing is complete
*/
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
return chain.filter(exchange).then(Mono.fromRunnable(() -> {
exchange.getResponse().getHeaders().entrySet().stream()
.filter(kv -> (kv.getValue() != null && kv.getValue().size() > 1))
.filter(kv -> (kv.getKey().equals(HttpHeaders.ACCESS_CONTROL_ALLOW_ORIGIN)
|| kv.getKey().equals(HttpHeaders.ACCESS_CONTROL_ALLOW_CREDENTIALS)))
.forEach(kv -> {
kv.setValue(Arrays.asList(kv.getValue().get(1)));
});
}));
}
}
本文只给解决方式,仅供参考。