okay

Okay

Simple validation library for Go.

type UserRegistrationPayload struct {
   Username, Email, Password, City string
   Age uint8
}

func (u UserRegistrationPayload) Okay() (ValidationErrors, error) {
   o := okay.New()

   o.Text(u.Username, "username").Required().MinLength(6)
   o.Text(u.Email, "email").Required().IsEmail().DoesNotEndWith(".edu")
   o.Text(u.City, "city").Required().Is("London")
   ...

   return o.Errors()
}

func (h *Handler) Register(w http.ResponseWriter, r *http.Request) {
   var u UserRegistrationPayload
   json.NewEncoder(r.Body).Encode(&u)
   validationErrs, err := okay.Validate(u) // calls u.Okay, under the hood
   if err != nil {
   	// unexpected error
   	// should probably give an internal server error
   }
   if len(validationErrs) > 0 {
   	// set headers 
   	// send the errors
   	// ...
   }
}