How to format the url?

January 22, 2023

I want to format url. Here is an example:

Input:

www.google.com

google.com

Output:

https://www.google.com/

I need to format the url because I’m using a validator function that needs to check if the text is a url. When I type www.google.com or google.com it says it’s not a url because it requires https at the beginning of the text.

My code:

validator: (value) {
  if (value == null) {
    return null;
  }
  if (Uri.parse(value).host.isEmpty) {
    return "Please type a valid url";
  }
},

Feel free to leave a comment if you need more information.

How to format the url? I would appreciate any help. Thank you in advance!

>Solution :

I have added some more conditions to your validator function :

validator: (value) => {
  if (value == null) {
    return null;
  }
  if (!value.startsWith("https://")) {
    value = "https://" + value;
  }
  if (!value.startsWith("https://www.") && !value.startsWith("https://")) {
    value = "https://www." + value.substring(8);
  }
  if (Uri.parse(value).host.isEmpty) {
    return "Please type a valid url";
  }
}