GateWay全局過濾器（Global Filters）配置及跨域請求

系統自帶全局過濾器：

 

 

 全局過濾器特點：

局部過濾器和全局過濾器區別： 

   局部：局部針對某個路由， 需要在路由中進行配置 

   全局：針對所有路由請求， 一旦定義就會投入使用

自定義全局過濾器：

實現 GlobalFiter 過濾器：

package com.tulingxueyuan.filters;

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.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;


@Component
public class LogFilter implements GlobalFilter {
    Logger log= LoggerFactory.getLogger(this.getClass());

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        log.info(exchange.getRequest().getPath().value());
        return chain.filter(exchange);
    }
}

Gateway跨域配置：

第一種方式：

# 跨域配置
spring:
  cloud:
    gateway:
      globalcors:
        cors-configurations:
          '[/**]': # 允許跨域訪問的資源
            allowedOrigins: "*" #跨域允許來源, * 代表允許所有的請求進行跨域請求             allowedMethods:
              - GET
              - POST

第二種方式：

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("*");   // 允許的method
        config.addAllowedOrigin("*");   // 允許的來源
        config.addAllowedHeader("*");   // 允許的請求頭參數

        // 運行訪問的資源
        UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource(new PathPatternParser());
        source.registerCorsConfiguration("/**", config);

        return new CorsWebFilter(source);
    }
}