springcloud gateway整合swagger做分布式聚合文档

红太狼 2021-05-12 11:49 661阅读 0赞

项目中使用gateway做路由，根据请求头访问不同的api，api中使用openfegin，去访问对应的service。为了说明配置，摘取项目核心的代码。包括gateway,user-api,standard-api。

#### 1.swagger依赖 ####

gateway和api中的需要引入swagger的相应依赖：

<properties>
        <swagger.version>2.9.2</swagger.version>
    </properties>
    <dependencies> 
        <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger2</artifactId>
                <version>2.9.2</version>
            </dependency>
    
            <dependency>
                <groupId>io.springfox</groupId>
                <artifactId>springfox-swagger-ui</artifactId>
                <version>2.9.2</version>
            </dependency>
    </dependencies>

#### 2.gateway中配置加载swagger信息 ####

import com.ruizhi.detection.component.SwaggerProvider;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.http.HttpStatus;
    import org.springframework.http.ResponseEntity;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    import springfox.documentation.swagger.web.*;
    
    import java.util.List;
    
    /**
     * @description: 用于加载swagger中相关信息的controller
     * @Author: 
     * @Date: 2020/2/11 11:27
     */
    @RestController
    @RequestMapping("/swagger-resources")
    public class SwaggerResourceController { 
    
        private SwaggerProvider swaggerProvider;
    
        // TODO: 添加权限校验
        @Autowired
        public SwaggerResourceController(SwaggerProvider swaggerProvider) { 
            this.swaggerProvider = swaggerProvider;
        }
    
        @RequestMapping(value = "/configuration/security")
        public ResponseEntity<SecurityConfiguration> securityConfiguration() { 
            return new ResponseEntity<>(SecurityConfigurationBuilder.builder().build(), HttpStatus.OK);
        }
    
        @RequestMapping(value = "/configuration/ui")
        public ResponseEntity<UiConfiguration> uiConfiguration() { 
            return new ResponseEntity<>(UiConfigurationBuilder.builder().build(), HttpStatus.OK);
        }
    
        @RequestMapping
        public ResponseEntity<List<SwaggerResource>> swaggerResources() { 
            return new ResponseEntity<>(swaggerProvider.get(), HttpStatus.OK);
        }
    }

#### 3.gateway中配置nacos中注册的服务 ####

import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.beans.factory.annotation.Value;
    import org.springframework.cloud.gateway.route.RouteLocator;
    import org.springframework.stereotype.Component;
    import springfox.documentation.swagger.web.SwaggerResource;
    import springfox.documentation.swagger.web.SwaggerResourcesProvider;
    import java.util.ArrayList;
    import java.util.HashSet;
    import java.util.List;
    import java.util.Set;
    
    /**
     * @description: 用于加载在nacos中注册的服务
     * @Author:
     * @Date: 2020/2/11 11:23
     */
    @Component
    public class SwaggerProvider implements SwaggerResourcesProvider { 
    
        /**
         * swagger2默认的url后缀
         */
        private static final String SWAGGER2URL = "/v2/api-docs";
    
        /**
         * 网关路由
         */
        private final RouteLocator routeLocator;
    
        /**
         * 网关应用名称
         */
        @Value("${spring.application.name}")
        private String self;
    
        @Autowired
        public SwaggerProvider(RouteLocator routeLocator) { 
            this.routeLocator = routeLocator;
        }
    
        @Override
        public List<SwaggerResource> get() { 
            List<SwaggerResource> resources = new ArrayList<>();
            List<String> routeHosts = new ArrayList<>();
            // 获取所有可用的host：serviceId
            routeLocator.getRoutes().filter(route -> route.getUri().getHost() != null)
                    .filter(route -> !self.equals(route.getUri().getHost()))
                    .subscribe(route -> routeHosts.add(route.getUri().getHost()));
            // 记录已经添加过的server，存在同一个应用注册了多个服务在nacos上
            Set<String> dealed = new HashSet<>();
            routeHosts.forEach(instance -> { 
                // 拼接url
                String url = "/" + instance + SWAGGER2URL;
                if (!dealed.contains(url)) { 
                    dealed.add(url);
                    SwaggerResource swaggerResource = new SwaggerResource();
                    swaggerResource.setUrl(url);
                    swaggerResource.setName(instance);
                    resources.add(swaggerResource);
                }
            });
            return resources;
        }
    }

#### 4.user-api和standard-api中设置swagger中的配置 ####

这两个类基本上差不多，我只贴其中一个

import org.springframework.context.annotation.Bean;
    import org.springframework.context.annotation.Configuration;
    import springfox.documentation.builders.ApiInfoBuilder;
    import springfox.documentation.builders.PathSelectors;
    import springfox.documentation.builders.RequestHandlerSelectors;
    import springfox.documentation.service.ApiInfo;
    import springfox.documentation.spi.DocumentationType;
    import springfox.documentation.spring.web.plugins.Docket;
    import springfox.documentation.swagger2.annotations.EnableSwagger2;
    
    /**
     * @description: 配置描述swagger的描述
     * @Author: 
     * @Date: 2020/2/11 11:47
     */
    @EnableSwagger2
    @Configuration
    public class SwaggerConfig { 
    
        /**
         * 创建API
         */
        @Bean
        public Docket createRestApi() { 
            return new Docket(DocumentationType.SWAGGER_2)
                    // 详细定制
                    .apiInfo(apiInfo("1.0.0"))
                    .select()
                    // 指定扫描的包路径
                  .apis(RequestHandlerSelectors.basePackage("com.detection.controller"))
                    // 扫描所有
                    .paths(PathSelectors.any())
                    .build();
        }
    
        /**
         * 添加摘要信息
         */
        private ApiInfo apiInfo(String version) { 
            // 用ApiInfoBuilder进行定制
            return new ApiInfoBuilder()
                    .title("标准管理的接口文档")
                    .version(version)
                    .build();
        }
    }

#### 5.gateway中路由规则的配置 ####

spring:
      cloud:
        gateway:
          enabled: true
          discovery:
            locator:
              lower-case-service-id: true
          routes:
            #netty 路由过滤器(数组)，http或https开头 lb://代表是服务的名称 predicates:表示会过滤掉的请求头
            - id: user-router
              uri: lb://user-api
              predicates:
                - Path=/user-api/**
              filters:
              - StripPrefix=1
            - id: standard-router
              uri: lb://standard-api
              predicates:
                - Path=/standard-api/**
              filters:
              - StripPrefix=1
            - id: file-upload-router
              uri: lb://file-service
              predicates:
                - Path=/file-service/**
              filters:
              - StripPrefix=1
        #处理跨域请求问题
        globalcors:
          cors-configurations:
            '[/**]':
              allowedOrigins: "*"
              allowedMethods: "*"

这里需要主要path中的请求头，需要跟uri中的一致，都是你服务的名称，否则你访问的时候，就过滤不掉头部，请求具体的api时会多一个请求头。  
配置好之后，启动访问http://localhost:\{port\}/swagger-ui.html就可以看到swagger的页面了。其中port为你的gateway端口.  
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具体swagger的配置，可以网上搜索一下api，这里我贴几个大概的参考下。

##### 1.controller的代码 #####

/**
         * 新增标准信息
         * @param dto 标准的dto
         * @return
         */
        @ApiOperation(value = "新增标准信息", httpMethod = "POST")
        @RequestMapping(value = "/saveStandardInfo", method = RequestMethod.POST)
        public ResponseDto saveStandardInfo(@RequestBody StandardInfoDto dto) { 
            return iStandardInfoService.saveStandardInfo(dto);
        }
    
        /**
         * 标准信息--查看
         * @param standardId 标准的id
         * @return ResponseDto
         * <StandardInfoDto>这种写法是为了让其在swagger中展示嵌套的json值
         */
        @ApiOperation(value = "根据id查询标准信息", httpMethod = "GET")
        @RequestMapping(value = "/findStandardInfo", method = RequestMethod.GET)
        @ApiImplicitParam(name = "standardId", value = "标准id", dataType = "string")
        public ResponseDto<StandardInfoDto> findStandardInfo(@RequestParam(value = "standardId") String standardId) { 
            return iStandardInfoService.findStandardInfo(standardId);
        }
    
        /**
         * 标准信息--修改状态
         * @param standardId    标准的id
         * @param standardState 标准的状态
         * @return
         */
        @ApiOperation(value = "修改标准信息的状态", httpMethod = "GET")
        @RequestMapping(value = "/updateStateStandardInfo", method = RequestMethod.GET)
        @ApiImplicitParams({ 
                @ApiImplicitParam(name = "standardId", value = "标准id", dataType = "string"),
                @ApiImplicitParam(name = "standardState", value = "标准的状态", dataType = "string", example = "1,2,3")
        })
        public ResponseDto updateStateStandardInfo(@RequestParam(value = "standardId") String standardId, @RequestParam(value = "standardState") String standardState) { 
            return iStandardInfoService.updateStateStandardInfo(standardId, standardState);
        }

##### 2.model #####

/**
     * @description:用于返回数据的dto
     * @Author:
     * @Date: 2019/8/15  15:46
     */
    @Data
    @ApiModel("返回类")
    public class ResponseDto<T> { 
    
        /**
         * 状态码
         */
        @ApiModelProperty(value = "状态码")
        private Integer code;
    
        /**
         * 状态信息
         */
        @ApiModelProperty(value = "状态信息")
        private String message;
    
        /**
         * 数据
         */
        @ApiModelProperty(value = "数据")
        private T data;
    
        public ResponseDto(Integer code, String message, T data) { 
            this.code = code;
            this.data = data;
            this.message = message;
        }
    }

这里注意就是apiModel中，可以用value,也可以用tag，但是用tag会出现多个的model，还有就是不管用tag还是value，不能出现"/"否则会报错。

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