网关路由配置

spring:
  cloud:
    gateway:
      routes:
      #UPMS 模块
      - id: pig-upms      # 唯一的服务 ID
        uri: lb://pig-upms # 注册中心的服务名称，实现负载均衡
        predicates:
        - Path=/admin/**  #所有业务的请求前缀，会在② 中自动去除

public class PigRequestGlobalFilter implements GlobalFilter, Ordered {
	private static final String HEADER_NAME = "X-Forwarded-Prefix";

	@Override
	public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
		// 1. 清洗请求头中 from 参数
		ServerHttpRequest request = exchange.getRequest().mutate()
			.headers(httpHeaders -> httpHeaders.remove(SecurityConstants.FROM))
			.build();

		// 2. 重写 StripPrefix
		addOriginalRequestUrl(exchange, request.getURI());
		String rawPath = request.getURI().getRawPath();
		String newPath = "/" + Arrays.stream(StringUtils.tokenizeToStringArray(rawPath, "/"))
			.skip(1L).collect(Collectors.joining("/"));
		ServerHttpRequest newRequest = request.mutate()
			.path(newPath)
			.build();
		exchange.getAttributes().put(GATEWAY_REQUEST_URL_ATTR, newRequest.getURI());

		return chain.filter(exchange.mutate()
			.request(newRequest.mutate()
				.build()).build());
	}

	@Override
	public int getOrder() {
		return -1000;
	}
}