Sometimes (often) you want to validate user inputs. After looking at some validation library we decided to use . Your structure needs to implement :
ValidateWithContext(ctx context.Context) error
or Validate() error
Example
package main
import (
"net/http"
validation "github.com/alexisvisco/ozzo-validation/v4"
"github.com/alexisvisco/ozzo-validation/v4/is"
"github.com/go-chi/chi"
"github.com/alexisvisco/kcd"
)
func main() {
r := chi.NewRouter()
r.Get("/{name}", kcd.Handler(YourHttpHandler, http.StatusOK))
_ = http.ListenAndServe(":3000", r)
}
// CreateCustomerInput is an example of input for an http request.
type CreateCustomerInput struct {
Name string `path:"name"`
}
func (c *CreateCustomerInput) Validate() error {
return validation.ValidateStruct(c,
validation.Field(&c.Name, validation.Required, is.Alpha))
}
// YourHttpHandler is here using the ctx of the request.
func YourHttpHandler(c *CreateCustomerInput) (*CreateCustomerInput, error) {
return c, nil
}
// Test it : curl localhost:3000/alexis
If you test this code with a curl localhost:3000/123 you will get an error because the name must be alphabetical as described in the Validate function.
You will get something like this:
{
"error_description": "the request has one or multiple invalid fields",
"error": "invalid_argument",
"fields": {
"name": "must contain English letters only"
}
}
