前言
由于工作中使用的 rpc 框架是 dubbo，经常需要调试不同环境的 dubbo 接口，例如本地环境、开发环境和测试环境。而为了统一管理 http 接口和 dubbo 接口，希望使用统一的调试工具，例如 PostMan 或 ApiPost 等，因此萌生了开发一个 dubbo 的 http 代理工具的念头。
准备
由于是通用的 dubbo 代理，因此肯定需要使用泛化调用。而我们使用的注册中心是 nacos，因此也需要使用 nacos-sdk 来获取 provider 的实例信息。
实现
项目结构
│
├── dubbo/
│ ├─ generic.go # 泛化调用 dubbo 接口
│ ├─ models.go # 数据模型
│ └─ nacos.go # 获取 nacos 元信息
├── web/
│ └─ server.go # 对外 http 接口
│
├── main.go # main 入口函数
└── go.mod # 模块描述文件
go.mod
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module dubbo-proxygo 1.20require ( dubbo.apache.org/dubbo-go/v3 v3.0.5 github.com/apache/dubbo-go-hessian2 v1.12.0 github.com/gin-gonic/gin v1.9.0 github.com/nacos-group/nacos-sdk-go/v2 v2.1.2) |
返回数据格式
dubbo/models.go:
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type DataResult struct { Env string `json:"env,omitempty"` // 当前调用环境 Code string `json:"code,omitempty"` // 返回结果码 Data any `json:"data,omitempty"` // 返回结果 Message string `json:"message,omitempty"` // 返回消息} |
获取 nacos 元信息
根据环境创建 nacos client
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func buildClient(env string, serverCfgs []constant.ServerConfig) naming_client.INamingClient { client, _ := clients.NewNamingClient( vo.NacosClientParam{ ClientConfig: constant.NewClientConfig( constant.WithNamespaceId(env), constant.WithNotLoadCacheAtStart(true), ), ServerConfigs: serverCfgs, }, ) return client} |
获取服务实例
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func SelectInstance(env, servName string) (string, bool) { cli, ok := cliMap[env] if !ok { return "client not found from " + env, false } instances, e := cli.SelectInstances(vo.SelectInstancesParam{ ServiceName: fmt.Sprintf("providers:%s:1.0.0:", servName), HealthyOnly: true, }) if e != nil { return "instance not found, " + e.Error(), false } if len(instances) <= 0 { return "instance not found", false } return fmt.Sprintf("dubbo://%s:%d", instances[0].Ip, instances[0].Port), true} |
完整代码
dubbo/nacos.go:
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package dubboimport ( "fmt" "github.com/nacos-group/nacos-sdk-go/v2/clients" "github.com/nacos-group/nacos-sdk-go/v2/clients/naming_client" "github.com/nacos-group/nacos-sdk-go/v2/common/constant" "github.com/nacos-group/nacos-sdk-go/v2/vo")var cliMap = make(map[string]naming_client.INamingClient)func init() { serverCfgs := []constant.ServerConfig{ *constant.NewServerConfig("127.0.0.1", 6801, constant.WithContextPath("/nacos")), } cliMap["local"] = buildClient("local", serverCfgs) cliMap["dev"] = buildClient("develop", serverCfgs) cliMap["test"] = buildClient("test", serverCfgs)}func buildClient(env string, serverCfgs []constant.ServerConfig) naming_client.INamingClient { client, _ := clients.NewNamingClient( vo.NacosClientParam{ ClientConfig: constant.NewClientConfig( constant.WithNamespaceId(env), constant.WithNotLoadCacheAtStart(true), ), ServerConfigs: serverCfgs, }, ) return client}func SelectInstance(env, servName string) (string, bool) { cli, ok := cliMap[env] if !ok { return "client not found from " + env, false } instances, e := cli.SelectInstances(vo.SelectInstancesParam{ ServiceName: fmt.Sprintf("providers:%s:1.0.0:", servName), HealthyOnly: true, }) if e != nil { return "instance not found, " + e.Error(), false } if len(instances) <= 0 { return "instance not found", false } return fmt.Sprintf("dubbo://%s:%d", instances[0].Ip, instances[0].Port), true} |
泛化调用
dubbo root 配置
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var dubboRoot = cfg.NewRootConfigBuilder().SetProtocols(map[string]*cfg.ProtocolConfig{ dubbo.DUBBO: { Params: map[string]interface{}{ "getty-session-param": map[string]interface{}{ "max-msg-len": 1024000, }, }, },}).Build() |
泛化调用
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func GenericInvoke(iName, method, env string, req []byte) DataResult { instance, ok := SelectInstance(env, iName) if !ok { return DataResult{ Code: "ERROR", Message: instance, } } cfg.Load(cfg.WithRootConfig(dubboRoot)) refConf := cfg.ReferenceConfig{ InterfaceName: iName, Cluster: "failover", Protocol: dubbo.DUBBO, Generic: "true", Version: "1.0.0", URL: instance, } refConf.Init(dubboRoot) refConf.GenericLoad("dubbo-proxy") var args = utils.Unmarshal(req, &map[string]hessian.Object{}) raw, err := refConf.GetRPCService().(*generic.GenericService).Invoke(context.Background(), method, nil, []hessian.Object{args}) if err != nil { panic(err) } rawResult := raw.(map[interface{}]interface{}) result := DataResult{ Code: rawResult["code"].(string), Message: rawResult["message"].(string), Data: utils.ConvertAs(rawResult["data"], map[string]interface{}{}), } return result} |
注意25-30行要根据业务自身的返回数据格式包装结果：
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/* 这个例子的 dubbo 调用都会返回通过的结构： { "code": "", "message": "", "data": // 真正的调用结果 }*/rawResult := raw.(map[interface{}]interface{})result := DataResult{ Code: rawResult["code"].(string), Message: rawResult["message"].(string), Data: rawResult["data"],} |
完整代码
dubbo/generic.go:
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package dubboimport ( "context" "dubbo-proxy/utils" cfg "dubbo.apache.org/dubbo-go/v3/config" "dubbo.apache.org/dubbo-go/v3/config/generic" _ "dubbo.apache.org/dubbo-go/v3/imports" "dubbo.apache.org/dubbo-go/v3/protocol/dubbo" hessian "github.com/apache/dubbo-go-hessian2")var dubboRoot = cfg.NewRootConfigBuilder().SetProtocols(map[string]*cfg.ProtocolConfig{ dubbo.DUBBO: { Params: map[string]interface{}{ "getty-session-param": map[string]interface{}{ "max-msg-len": 1024000, }, }, },}).Build()func GenericInvoke(iName, method, env string, req []byte) DataResult { instance, ok := SelectInstance(env, iName) if !ok { return DataResult{ Code: "ERROR", Message: instance, } } cfg.Load(cfg.WithRootConfig(dubboRoot)) refConf := cfg.ReferenceConfig{ InterfaceName: iName, Cluster: "failover", Protocol: dubbo.DUBBO, Generic: "true", Version: "1.0.0", URL: instance, } refConf.Init(dubboRoot) refConf.GenericLoad("dubbo-proxy") var args = utils.Unmarshal(req, &map[string]hessian.Object{}) raw, err := refConf.GetRPCService().(*generic.GenericService).Invoke(context.Background(), method, nil, []hessian.Object{args}) if err != nil { panic(err) } rawResult := raw.(map[interface{}]interface{}) result := DataResult{ Code: rawResult["code"].(string), Message: rawResult["message"].(string), Data: utils.ConvertAs(rawResult["data"], map[string]interface{}{}), } return result} |
提供 http 服务
dubbo/generic.go:
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package webimport ( "dubbo-proxy/dubbo" "github.com/gin-gonic/gin" "net/http")func Run() { router := gin.Default() router.POST("/:intf/:method", func(c *gin.Context) { intf := c.Param("intf") method := c.Param("method") env := c.Query("env") data, err := c.GetRawData() if err != nil { panic(err) } res := dubbo.GenericInvoke(intf, method, env, data) res.Env = env c.JSON(http.StatusOK, res) }) panic(router.Run(":7788"))} |
启动
main.go:
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package mainimport "dubbo-proxy/web"func main() { web.Run()} |
效果
以上就是Golang基于泛化调用与Nacos实现Dubbo代理的详细内容，更多关于Golang Dubbo代理的资料请关注服务器之家其它相关文章！
原文链接：https://www.ciphermagic.cn/go-dubbo-proxy.html
