From a01a6e88d3a59301136f500b309b76cc12755346 Mon Sep 17 00:00:00 2001 From: tanghc Date: Thu, 4 Mar 2021 10:02:59 +0800 Subject: [PATCH 1/5] 4.3.0 --- doc/docs/files/90012_原理分析之如何路由.md | 86 +++++-------------- .../controller/FilterPrintController.java | 58 +++++++++++++ 2 files changed, 79 insertions(+), 65 deletions(-) create mode 100644 sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java diff --git a/doc/docs/files/90012_原理分析之如何路由.md b/doc/docs/files/90012_原理分析之如何路由.md index cc14416e..5352cf16 100644 --- a/doc/docs/files/90012_原理分析之如何路由.md +++ b/doc/docs/files/90012_原理分析之如何路由.md @@ -1,77 +1,33 @@ # 原理分析之如何路由 -## zuul如何路由 +Spring Cloud Gateway通过一系列的Filter来进行数据的传输，如下图所示： -SOP网关默认使用zuul，当然也默认使用了zuul提供的路由功能。zuul默认使用过滤器来实现路由转发， -我们看下zuul中自带的过滤器： +![流程图](images/90012_1.png) -| 类型 | 顺序 | 过滤器 | 功能 | -| ----- | ---- | ----------------------- | ---------------------------- | -| pre | -3 | ServletDetectionFilter | 标记处理 Servlet 的类型 | -| pre | -2 | Servlet30WrapperFilter | 包装 HttpServletRequest 请求 | -| pre | -1 | FormBodyWrapperFilter | 包装请求体 | -| pre | 1 | DebugFilter | 标记调试标志 | -| pre | 5 | PreDecorationFilter | 决定路由转发过滤器 | -| route | 10 | RibbonRoutingFilter | serviceId 请求转发 | -| route | 100 | SimpleHostRoutingFilter | url 请求转发 | -| route | 500 | SendForwardFilter | forward 请求转发 | -| post | 0 | SendErrorFilter | 处理有错误的请求响应 | -| post | 1000 | SendResponseFilter | 处理正常的请求响应 | +SOP网关在此基础上新增了几个Filter用来处理自己的逻辑，如：前置校验、结果返回。 -上图就是zuul提供的默认过滤器，可在org.springframework.cloud.netflix.zuul.filters下查看。 +| 过滤器 | 类型 | Order | 功能 | +| ----- | ---- | ----------------------- | ---------------------------- | +|IndexFilter| `自定义` | -2147483648 | 入口过滤器，获取参数、签名校验 | +|ParameterFormatterFilter | 自定义 | -2147482647 | 格式化参数 | +|LimitFilter|`自定义`|-2147482447|限流| +|ForwardPathFilter|系统自带|0 |设置转发的path| +|RouteToRequestUrlFilter|系统自带|10000|设置转发host| +|SopLoadBalancerClientFilter|`自定义`|10100|LoadBalance获取转发实例| +|NettyRoutingFilter|系统自带|2147483647|获取httpclient发送请求| +|ForwardRoutingFilter|系统自带|2147483647|请求分发| +|GatewayModifyResponseGatewayFilter|`自定义`|-2|处理响应结果| -zuul的过滤器顺序值小的优先执行，其中的`PreDecorationFilter`是我们重点关注的类，由它来决定路由转发去向。 +一个完整的请求会自上而下经过这些Filter，下面讲解如何动态设置路由。 -打开PreDecorationFilter类，看到类注释有一句话：`that determines where and how to route based on the supplied` +## 动态设置路由 -翻译过来就是说，决定从哪里获取路由，然后怎样去路由。 +网关启动后会从注册中心拉取微服务实例，然后请求微服务提供的一个接口（`/sop/routes`），获取开放接口信息（被`@Open`注解的接口）。 -PreDecorationFilter类的核心方法是run()方法。找到run方法中这一句代码： +监听处理类在：`com.gitee.sop.bridge.route.NacosRegistryListener` -`Route route = this.routeLocator.getMatchingRoute(requestURI);` +获取到路由信息后，将路由信息缓存到本地，并保存到数据库，代码在：`com.gitee.sop.gatewaycommon.gateway.route.GatewayRouteCache.load` -这句代码很重要，表示路由从哪里获取，如果我们能够重写getMatchingRoute方法那就可以返回自己定义的路由了。 +然后动态设置Gateway路由，代码在：`com.gitee.sop.gatewaycommon.gateway.route.GatewayRouteRepository.refresh` -接下来找到RouteLocator类的定义，发现是通过构造方法传进来的，那么我们就去找使用构造方法的类。（IDEA下右键构造方法--Find Usage） - -在org.springframework.cloud.netflix.zuul.ZuulProxyAutoConfiguration类中找到了定义 - -```java -// pre filters -@Bean -@ConditionalOnMissingBean(PreDecorationFilter.class) -public PreDecorationFilter preDecorationFilter(RouteLocator routeLocator, ProxyRequestHelper proxyRequestHelper) { - return new PreDecorationFilter(routeLocator, this.server.getServlet().getContextPath(), this.zuulProperties, - proxyRequestHelper); -} -``` - -方法默认注入了RouteLocator类，默认注入的实现是CompositeRouteLocator类（通过打断点可以查看）。 - -同时方法上用了`@ConditionalOnMissingBean`注解，表示如果其它地方没有声明，则默认使用这个。 - -因此我们可以自己声明一个PreDecorationFilter，然后注入自定义的RouteLocator就行了。 - -SOP自定义的RouteLocator为：`com.gitee.sop.gatewaycommon.zuul.route.SopRouteLocator`，可自行前往查看。 - -然后再我们的Config中定义： - -```java -/** - * 选取路由 - * @param zuulRouteRepository - * @param proxyRequestHelper - * @return - */ -@Bean -public PreDecorationFilter preDecorationFilter(ZuulRouteRepository zuulRouteRepository, ProxyRequestHelper proxyRequestHelper) { - // 自定义路由 - RouteLocator routeLocator = new SopRouteLocator(zuulRouteRepository); - return new PreDecorationFilter(routeLocator, - this.server.getServlet().getContextPath(), - this.zuulProperties, - proxyRequestHelper); -} -``` - -到此，我们只需要实现RouteLocator接口，就能使用zuul默认的路由功能，非常方便。 +当有微服务重新启动时，网关会监听到微服务实例有变更，会重复上述步骤，确保网关存有最新的路由。 diff --git a/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java b/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java new file mode 100644 index 00000000..4ac3969b --- /dev/null +++ b/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java @@ -0,0 +1,58 @@ +package com.gitee.sop.gatewaycommon.gateway.controller; + +import org.springframework.beans.factory.annotation.Autowired; +import org.springframework.cloud.gateway.filter.GlobalFilter; +import org.springframework.context.ApplicationContext; +import org.springframework.core.Ordered; +import org.springframework.http.ResponseEntity; +import org.springframework.stereotype.Controller; +import org.springframework.web.bind.annotation.RequestMapping; +import org.springframework.web.server.ServerWebExchange; +import reactor.core.publisher.Mono; + +import java.util.Comparator; +import java.util.List; +import java.util.Map; +import java.util.stream.Collectors; + +/** + * @author tanghc + */ +@Controller +public class FilterPrintController { + + @Autowired + private ApplicationContext applicationContext; + + @RequestMapping("sop/listGlobalFilters") + public Mono> listGlobalFilters(ServerWebExchange exchange) { + Map filterMap = applicationContext.getBeansOfType(GlobalFilter.class); + List filters = filterMap.values() + .stream() + .sorted(new Comparator() { + @Override + public int compare(GlobalFilter o1, GlobalFilter o2) { + if (o1 instanceof Ordered && o2 instanceof Ordered) { + Ordered order1 = (Ordered) o1; + Ordered order2 = (Ordered) o2; + return Integer.compare(order1.getOrder(), order2.getOrder()); + } + return 0; + } + }) + .map(globalFilter -> { + int order = 0; + if (globalFilter instanceof Ordered) { + Ordered ordered = (Ordered) globalFilter; + order = ordered.getOrder(); + } + return order + ", " + globalFilter.getClass().getSimpleName(); + }) + .collect(Collectors.toList()); + + String result = String.join("
", filters); + return Mono.just(ResponseEntity.ok(result)); + } + + +} From f32eccd4924a186ec650fd9096ec81bc9a618e0a Mon Sep 17 00:00:00 2001 From: tanghc Date: Thu, 4 Mar 2021 10:03:56 +0800 Subject: [PATCH 2/5] 4.3.0 --- .../controller/FilterPrintController.java | 58 ------------------- 1 file changed, 58 deletions(-) delete mode 100644 sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java diff --git a/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java b/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java deleted file mode 100644 index 4ac3969b..00000000 --- a/sop-common/sop-gateway-common/src/main/java/com/gitee/sop/gatewaycommon/gateway/controller/FilterPrintController.java +++ /dev/null @@ -1,58 +0,0 @@ -package com.gitee.sop.gatewaycommon.gateway.controller; - -import org.springframework.beans.factory.annotation.Autowired; -import org.springframework.cloud.gateway.filter.GlobalFilter; -import org.springframework.context.ApplicationContext; -import org.springframework.core.Ordered; -import org.springframework.http.ResponseEntity; -import org.springframework.stereotype.Controller; -import org.springframework.web.bind.annotation.RequestMapping; -import org.springframework.web.server.ServerWebExchange; -import reactor.core.publisher.Mono; - -import java.util.Comparator; -import java.util.List; -import java.util.Map; -import java.util.stream.Collectors; - -/** - * @author tanghc - */ -@Controller -public class FilterPrintController { - - @Autowired - private ApplicationContext applicationContext; - - @RequestMapping("sop/listGlobalFilters") - public Mono> listGlobalFilters(ServerWebExchange exchange) { - Map filterMap = applicationContext.getBeansOfType(GlobalFilter.class); - List filters = filterMap.values() - .stream() - .sorted(new Comparator() { - @Override - public int compare(GlobalFilter o1, GlobalFilter o2) { - if (o1 instanceof Ordered && o2 instanceof Ordered) { - Ordered order1 = (Ordered) o1; - Ordered order2 = (Ordered) o2; - return Integer.compare(order1.getOrder(), order2.getOrder()); - } - return 0; - } - }) - .map(globalFilter -> { - int order = 0; - if (globalFilter instanceof Ordered) { - Ordered ordered = (Ordered) globalFilter; - order = ordered.getOrder(); - } - return order + ", " + globalFilter.getClass().getSimpleName(); - }) - .collect(Collectors.toList()); - - String result = String.join("
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--git a/doc/docs/files/90012_原理分析之如何路由.md b/doc/docs/files/90012_原理分析之如何路由.md index 5352cf16..da7d95be 100644 --- a/doc/docs/files/90012_原理分析之如何路由.md +++ b/doc/docs/files/90012_原理分析之如何路由.md @@ -9,7 +9,7 @@ SOP网关在此基础上新增了几个Filter用来处理自己的逻辑，如 | 过滤器 | 类型 | Order | 功能 | | ----- | ---- | ----------------------- | ---------------------------- | |IndexFilter| `自定义` | -2147483648 | 入口过滤器，获取参数、签名校验 | -|ParameterFormatterFilter | 自定义 | -2147482647 | 格式化参数 | +|ParameterFormatterFilter | `自定义` | -2147482647 | 格式化参数 | |LimitFilter|`自定义`|-2147482447|限流| |ForwardPathFilter|系统自带|0 |设置转发的path| |RouteToRequestUrlFilter|系统自带|10000|设置转发host| From 3fb6ac30e625017e0fbafd1bab2ffaab0c8df60a Mon Sep 17 00:00:00 2001 From: tanghc Date: Fri, 5 Mar 2021 16:33:10 +0800 Subject: [PATCH 5/5] 4.3.0 --- README.md | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/README.md b/README.md index 248fb9db..681ac33b 100644 --- a/README.md +++ b/README.md @@ -132,11 +132,13 @@ System.out.println(responseData); ## 分支说明 -- master：发版分支（当前为4.0版本） +- master：发版分支 - develop：日常开发分支 - eureka：使用eureka注册中心 - pr：接受PR的分支，提交PR请提交到此分支 +[更新说明](./changelog.md) + ## 相关文档 [开发文档](http://durcframework.gitee.io/sop)