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OAuth2::Client::Google cpan:BDUGGAN last updated on 2017-11-17



OAuth2::Client::Google -- Authenticate with Google using OAuth2.

Quick how-to

  1. Go to and create a project.

  2. Set up credentials for a web server and set your redirect URIs.

  3. Download the JSON file (client_id.json).

  4. In your application, create an oauth2 object like this:

        my $oauth =
            config => from-json('./client_id.json'.IO.slurp),
            redirect-uri => 'http://localhost:3334/oauth',
            scope => 'email'

where redirect-uri is one of your redirect URIs and scope is a space or comma-separated list of scopes from

To authenticate, redirect the user to


Then when they come back and send a request to '/oauth', grab the "code" parameter from the query string. Use it to call

my $token = $oauth.code-to-token(code => $code)

This will give you $token<access_token>, which you can then use with google APIs.

If you also included "email" in the scope, you will get id-token, which you can use like this:

my $identity = $oauth.verify-id(id-token => $token<id_token>)

which has, e.g. $identity<email> and $identity<given_name>.

For a working example, see eg/get-calendar-data.p6.


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