The google_oauth_2.0's intro from rajuc

google_oauth_2.0's Introduction

Erlang Google OAuth 2.0 API client for Server to Server Applications. This application will get a new access token for every one hour.

#####How to get the RSA Private Key file before running the application

Reference https://developers.google.com/identity/protocols/OAuth2ServiceAccount

After downloading the privatekey.p12 file enter the following 2 commands to convert in to RSA Private Key

  openssl pkcs12 -in privatekey.p12 -out priv/temp/key-enc.pem -nodes
  openssl rsa -in priv/temp/key-enc.pem -out priv/temp/RSA_Key.pem

Give the path of this RSA_KEY.pem in the RSA_KEY_PATH Macro in "oauth2_s2s.erl" module.
Enter the ISS in the config file and feel free to change other values before running

how to run the application

git clone [email protected]:RajuC/Google_OAuth_2.0.git
cd Google_OAuth_2.0/
make
erl -pa ebin/ deps/*/ebin -s oauth2_s2s -config config/sys.config

1> oauth2_s2s:get_access_token().

 [{<<"access_token">>,
 <<"ya29.LwL5_tv6bmaZyqzCm8-LiEA27dUi5UNps5ULvVgOdD-qXvZzxKCvQicModZyqn0r6g">>},
 {<<"token_type">>,<<"Bearer">>},
 {<<"expires_in">>,3600}]

2> oauth2_s2s:get_access_token(<<"https://www.googleapis.com/auth/devstorage.full_control">>).

 [{<<"access_token">>,
 <<"ya29.LwJyfO4raybzP5bzDyqIf6lPHjc8rMZeZuxxjGWLy5BMw1L6PzgSvtW54fIg6jbtb">>},
 {<<"token_type">>,<<"Bearer">>},
 {<<"expires_in">>,3600}]

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