如何在Golang中开发简单的请求参数解析_Golang请求参数解析项目实战汇总

func handleUser(w http.ResponseWriter, r *http.Request) {
    name := r.URL.Query().Get("name")
    ageStr := r.URL.Query().Get("age")

    var age int
    if ageStr != "" {
        age, _ = strconv.Atoi(ageStr)
    }

    fmt.Fprintf(w, "Name: %s, Age: %d", name, age)
}

func handleLogin(w http.ResponseWriter, r *http.Request) {
    err := r.ParseForm()
    if err != nil {
        http.Error(w, "无法解析表单", http.StatusBadRequest)
        return
    }

    username := r.Form.Get("username")
    password := r.Form.Get("password")

    fmt.Fprintf(w, "用户: %s, 密码: %s", username, password)
}

type User struct {
    Name  string `json:"name"`
    Email string `json:"email"`
    Age   int    `json:"age"`
}

func createUser(w http.ResponseWriter, r *http.Request) {
    var user User
    decoder := json.NewDecoder(r.Body)
    err := decoder.Decode(&user)
    if err != nil {
        http.Error(w, "无效的JSON", http.StatusBadRequest)
        return
    }
    defer r.Body.Close()

    fmt.Fprintf(w, "创建用户: %+v", user)
}

go get github.com/gorilla/mux

func getUser(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    id := vars["id"]
    fmt.Fprintf(w, "用户ID: %s", id)
}

// 路由注册
r := mux.NewRouter()
r.HandleFunc("/user/{id}", getUser).Methods("GET")

if user.Name == "" {
    http.Error(w, "姓名不能为空", http.StatusBadRequest)
    return
}