SpringCloud网关Gateway认证鉴权【SpringCloud系列7】
在Spring Cloud Gateway中,我们可以通过定义过滤器来实现鉴权功能。以下是一个简单的例子,展示了如何创建一个自定义的过滤器来进行鉴权:
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.io.buffer.DataBufferUtils;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;
import java.nio.charset.StandardCharsets;
public class AuthFilter implements GlobalFilter {
@Override
public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {
// 获取请求中的Token
String token = exchange.getRequest().getHeaders().getFirst("X-Auth-Token");
// 进行鉴权逻辑,这里简单示例
boolean authenticated = "expected-token".equals(token);
if (authenticated) {
// 鉴权通过,继续执行后续过滤器和路由
return chain.filter(exchange);
} else {
// 鉴权失败,返回401 Unauthorized响应
ServerHttpResponse response = exchange.getResponse();
response.setStatusCode(HttpStatus.UNAUTHORIZED);
response.getHeaders().set("Content-Type", "application/json");
String body = "{\"message\":\"Invalid authentication token\"}";
DataBufferUtils.write(response.bufferFactory().wrap(body.getBytes(StandardCharsets.UTF_8)), response.getBody());
return Mono.empty();
}
}
}
然后,你需要将这个自定义的过滤器注册到Spring Cloud Gateway中:
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.cloud.gateway.route.RouteLocator;
import org.springframework.cloud.gateway.builder.RouteLocatorBuilder;
@Configuration
public class GatewayConfig {
@Bean
public RouteLocator customRouteLocator(RouteLocatorBuilder builder) {
return builder.routes()
.route("path_route", r -> r.path("/api/**")
.filters(f -> f.filter(new AuthFilter())) // 添加鉴权过滤器
.uri("http://backend"))
.build();
}
}
在这个配置中,我们定义了一个路由,将匹配/api/**
的请求发送到后端服务,并且在发送之前应用了我们的鉴权过滤器。如果请求包含有效的鉴权token,它将被允许继续路由到后端服务;如果toke
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