This is a sample script for retrieving clientId using Google Apps Script.
var accessToken = ScriptApp.getOAuthToken();
var url = "https://www.googleapis.com/oauth2/v3/tokeninfo?access_token=" + accessToken;
var params = {
method: "post",
headers: {"Authorization": "Bearer " + accessToken}
};
var res = UrlFetchApp.fetch(url, params).getContentText();
var clientId = JSON.parse(res).azp;
Logger.log(clientId)
This is a Golang library to automatically get an authorization code for retrieving access token using OAuth2.
When it retrieves an access token and refresh token using OAuth2, the code for retrieving them has to be got by authorization on own browser. In order to retrieve the code, in generally, users have to click the authorization button and copy the code on the browser. This library can be automatically got the code by launching HTML server as a redirected server. At first, I have used this for retrieving the code from Google. But recently I noticed that this can be used for other sites. They are Google, GitHub, Slack and so on. This library can be used for creating such applications.
These GASs retrieve an access token for using Google Drive API. There are 3 parts. Before you use this, please retrieve client ID, client secret and redirect uri from Google , and choose scopes.
This is a script to output URL for retrieving “code” from web. Please retrieve “code” by import this URL to your browser. After you run this script, using “url” got from this script, it retrieves “code”.