So @kip you can use regex with URI parse to verify certain websites and profiles if they are valid like instagram facebook and vimeo videos.
My question is:
How can you combine URI.parse with regex does it have a method to do this?
Because i can’t find anything here URI — Elixir v1.20.2, does it have URI.parse/2? to include regex?
Or this idea can be done using a pipe something li this
uri_to_validate
|> URI.parse
|> regex_fn
Can you help me understand what this means? Maybe a simple example? I think what you’re saying is “if the host is instagram, check that the path of the URI conforms to how instagram represents profile URLs” but I’m not sure.
Yes to validate if the given url is valid for that specific social website.For example how to create a valid url for a facebook profile using URL.parse and regex.
Something like this?
defmodule Easy.Url do
@moduledoc """
A module for url validation with Ecto
"""
@doc """
Validate an url for only some given top level domains
"""
def validate_url(url) do
URI.parse(url)
|> validate_social_url(url)
end
def validate_social_url(%{host: "instagram.com"} = uri, url) do
case Regex.match(@insta_regex, uri.path) do
true -> {:ok, url}
false -> {:error, "Invalid profile url: #{url}"}
end
end
def validate_social_url(%{host: "facebook.com"} = uri, url) do
end
def validate_social_url(_other_uri, url) do
{:ok, url}
end
end
Thanks for the suggestion. I will try then to refine my module.
Just something bothered me with URI.parse.
iex(39)> URI.parse "http:// google.fr"
%URI{
authority: " google.fr",
fragment: nil,
host: " google.fr",
path: nil,
port: 80,
query: nil,
scheme: "http",
userinfo: nil
}
In the above example it takes blanks in the host string. Is that okay?
Thanks for the example I will have to try it sometime.
One thing is still unclear to me can this example be rewritten using defp and bring all the transformations in a pipe or is it better to do pattern match.
That looks like a bug in URI to me.
Not a bug. URI.parse is a parser, not a validator. So likely some additional work is required.
I would say pattern match for two reasons: