Possible to make regex that doesn't allow https in hostname?

February 25, 2022

I am using validate, and need to validate a host, and would like to have it fail, if http://, https:// or it is ending with / as in https://google.com/. It should fail if it is anything but of the form google.com.

Does anyone know how to do that?

const Schema = require('validate');

const p_schema = new Schema({
  Host: {
    type: String,
    match: /???/,
    required: true
  },
});
let p = {
    Host: 'https://google.com/'
}

const errors = p_schema.validate(p)

>Solution :

You want to check if your string contains a valid hostname, and you want your validation to fail if your string contains extraneous junk.

For that, use the npm is-valid-hostname package, and avoid creating your own regex for the purpose. There are lots of weird edge cases in hostnames, so you may as well use fully-debugged code rather than taking on the testing burden of writing your own regex.

const isValidHostname = require('is-valid-hostname')

isValidHostname('https://google.com/') // false
isValidHostname('google.com:443')      // false
isValidHostname('google.com')          // true