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get client_id from foursquare by OAuth2 gem

cli = OAuth2::Client.new('CLIENT_ID', :authorize_url => "/oauth2/authorize", :token_url => "/oauth2/access_token", :site => 'https://foursquare.com')

       

cli = OAuth2::Client.new(client_id, client_secret, :authorize_url => "/oauth2/authorize", :token_url => "/oauth2/access_token", :site => 'https://foursquare.com')

cli.auth_code.authorize_url(:redirect_uri => "http://localhost:3000")

token = cli.auth_code.get_token('authorization_code_value', :redirect_uri => "http://localhost:3000/person/index")

response = token.get('api/resource', :params => {'query_foo' => 'bar'})

response.class.name

       

1. Client_id: this is a unique id assigned to your application you

    create on any Oauth service provider or when you register you application.

 

 2. Secret_key:This is another part of Oauth communication which use to

    Authenticate the  consumer i.e you application.

       

Redirect users who wish to authenticate to

 

https://foursquare.com/oauth2/authenticate

    ?client_id=YOUR_CLIENT_ID

    &response_type=code

    &redirect_uri=YOUR_REGISTERED_REDIRECT_URI

       

https://YOUR_REGISTERED_REDIRECT_URI/?code=CODE

       

Your server will make a request for

 

https://foursquare.com/oauth2/access_token

?client_id=YOUR_CLIENT_ID

&client_secret=YOUR_CLIENT_SECRET

&grant_type=authorization_code

&redirect_uri=YOUR_REGISTERED_REDIRECT_URI

&code=CODE

       

{ access_token: ACCESS_TOKEN }