SpringCloudGateway 自定义局部过滤器

sszdzq2025-06-10 16:39

场景：

将所有请求转化为同一路径请求（方便穿网配置）在请求头内标识原来路径，然后在将请求分发给不同服务

复制代码

AllToOneGatewayFilterFactory

java 复制代码

import lombok.Getter;
import lombok.Setter;
import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilter;
import org.springframework.cloud.gateway.filter.factory.AbstractGatewayFilterFactory;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.stereotype.Component;

@Component
@Slf4j
public class AllToOneGatewayFilterFactory extends AbstractGatewayFilterFactory<AllToOneGatewayFilterFactory.Config> {
    public AllToOneGatewayFilterFactory() {
        super(Config.class);
    }

    @Override
    public GatewayFilter apply(Config config) {
        return (exchange, chain) -> {

            ServerHttpRequest request = exchange.getRequest();
            request.getURI();
            // 替换路径
            String path = request.getPath().toString();
            ServerHttpRequest modifiedRequest = request.mutate().header(config.headerName, path).path(config.getToPath()).build();
            exchange = exchange.mutate().request(modifiedRequest).build();

            log.info("AllToOne: headers{{}:{}}, {} ---> {}", config.getHeaderName(),path, request.getURI(), modifiedRequest.getURI());

            return chain.filter(exchange);
        };
    }
    
    @Setter
    @Getter
    public static class Config {
        private String headerName;
        private String toPath;

    }
}

bash 复制代码

 spring:
  cloud:
    gateway:
      httpclient:
        ssl:
          useInsecureTrustManager: true
      routes:
       - id: AllToOne_fnpt
         uri: http://localhost:19982
         predicates:
           - Path=/**
         filters:
           - name: AllToOne
             args:
               headerName: api-path
               toPath: /api/unified

注意：1.类名必须以GatewayFilterFactory结尾否则会出现不识别的情况

2.配置的filters -name 的值为类的前缀（截取GatewayFilterFactory之后的）