golang框架如何实现输入验证？

go get -u github.com/gorilla/mux
go get -u github.com/go-playground/validator/v10

import (
    "github.com/gorilla/mux"
)

func InputValidationHandler(w http.ResponseWriter, r *http.Request) {
    // 从请求中获取输入数据
    body, err := ioutil.ReadAll(r.Body)
    if err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    
    // 解析 JSON 输入
    data := struct {
        Name    string `json:"name"`
        Email   string `json:"email"`
        Address string `json:"address"`
    }{}
    if err := json.Unmarshal(body, &data); err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    
    // ...输入验证代码...
}

import (
    "github.com/go-playground/validator/v10"
)

func InputValidationWithValidator(w http.ResponseWriter, r *http.Request) {
    // 创建一个验证器
    validate := validator.New()
    
    // 验证输入
    body, err := ioutil.ReadAll(r.Body)
    if err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    
    data := struct {
        Name    string `json:"name" validate:"required,min=3,max=25"`
        Email   string `json:"email" validate:"required,email"`
        Address string `json:"address" validate:"required,min=10"`
    }{}
    if err := json.Unmarshal(body, &data); err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    if err := validate.Struct(data); err != nil {
        http.Error(w, err.Error(), http.StatusBadRequest)
        return
    }
    
    // ...成功处理...
}

router := mux.NewRouter()
router.HandleFunc("/register", InputValidationWithValidator).Methods("POST")
http.ListenAndServe(":8080", router)