springCloud 学习笔记—服务网关-Zuul

快来打我* 2022-01-11 13:45 309阅读 0赞

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NDE4NTE4_size_16_color_FFFFFF_t_70][]

参考连接 [https://www.jianshu.com/p/511db36c1b3e][https_www.jianshu.com_p_511db36c1b3e]

路由转发

EnableZuulProxy 启动类添加

zuul:
      routes:
      # /myProduct/product/list -> /product/product/list  转发路径
        aaaaaa:     # 这个可以任意填写
          path: /myProduct/**
          serviceId: product
          sensitiveHeaders:   # 这个设置成空，Cookie才能使用
      #简洁写法
    #    product: /myProduct/**
    management:
      security:
        enabled: false  # 权限设置 这个不设置，上面不会通过

排除

zuul:
      #排除某些路由
      ignored-patterns:
        - /**/product/listForOrder
    management:
      security:
        enabled: false

Cookie Zuul种默认被限制了

sensitiveHeaders:   \# 这个设置成空，Cookie才能使用

filter

@Component
    public class TokenFilter extends ZuulFilter {
        @Override
        public String filterType() {
            //类型
            return PRE_TYPE;
        }
    
        @Override
        public int filterOrder() {
            //越小优先级越高
            return PRE_DECORATION_FILTER_ORDER - 1;
        }
    
        @Override
        public boolean shouldFilter() {
            //是否开启状态
            return true;
        }
    
        @Override
        public Object run() {
            RequestContext requestContext = RequestContext.getCurrentContext();
            HttpServletRequest request = requestContext.getRequest();
    
            //这里从url参数里获取, 也可以从cookie, header里获取
            String token = request.getParameter("token");
            if (StringUtils.isEmpty(token)) {
                requestContext.setSendZuulResponse(false);
                requestContext.setResponseStatusCode(HttpStatus.UNAUTHORIZED.value());
            }
            return null;
        }
    }

令牌桶限流

[https://www.jianshu.com/p/5d4fe4b2a726][https_www.jianshu.com_p_5d4fe4b2a726] RateLimiter 使用方法

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NDE4NTE4_size_16_color_FFFFFF_t_70 1][]

/**
     * 限流
     * Created by 廖师兄
     * 2018-03-11 23:44
     */
    @Component
    public class RateLimitFilter extends ZuulFilter{
    
    	private static final RateLimiter RATE_LIMITER = RateLimiter.create(100);//每秒添加100个令牌
    
    	@Override
    	public String filterType() {
    		return PRE_TYPE;
    	}
    
    	@Override
    	public int filterOrder() {
    		return SERVLET_DETECTION_FILTER_ORDER - 1;
    	}
    
    	@Override
    	public boolean shouldFilter() {
    		return true;
    	}
    
    
    	@Override
    	public Object run() {
    		if (!RATE_LIMITER.tryAcquire()) {
    			throw new RateLimitException();
    		}
    
    		return null;
    	}
    }

跨域

项目内单个接口  使用CrossOrigin

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NDE4NTE4_size_16_color_FFFFFF_t_70 2][]

在网关设置全局跨越

@Configuration
    public class CorsConfig {
    
    	@Bean
    	public CorsFilter corsFilter() {
    		final UrlBasedCorsConfigurationSource source = new UrlBasedCorsConfigurationSource();
    		final CorsConfiguration config = new CorsConfiguration();
    
    		config.setAllowCredentials(true);
    		config.setAllowedOrigins(Arrays.asList("*")); //http:www.a.com
    		config.setAllowedHeaders(Arrays.asList("*"));
    		config.setAllowedMethods(Arrays.asList("*"));
    		config.setMaxAge(300l);//缓存时间，在单位时间内，同一请求不再验证
    
    		source.registerCorsConfiguration("/**", config);
    		return new CorsFilter(source);
    	}
    }

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NDE4NTE4_size_16_color_FFFFFF_t_70]: /images/20220110/57b5f504b6054f89b3e7e39f643ded30.png
[https_www.jianshu.com_p_511db36c1b3e]: https://www.jianshu.com/p/511db36c1b3e
[https_www.jianshu.com_p_5d4fe4b2a726]: https://www.jianshu.com/p/5d4fe4b2a726
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NDE4NTE4_size_16_color_FFFFFF_t_70 1]: /images/20220110/2216e82a5c9446d7ac5b3cfc307ae383.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzM1NDE4NTE4_size_16_color_FFFFFF_t_70 2]: /images/20220110/66c50478d5bf41b0b03a20ae1723c064.png