(Ruby) Google Drive Refresh Access Token

Demonstrates how to automatically refresh the access token when it expires.

Chilkat Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

success = true

# This example uses a previously obtained access token having permission for the 
# Google Drive scope.

# The access token (and refresh token) was previously saved to a JSON file with this format:
# See Get Google Drive OAuth2 Access Token

# {
#   "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw",
#   "expires_in": 3600,
#   "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA",
#   "scope": "https://www.googleapis.com/auth/drive",
#   "token_type": "Bearer"
# }

json = Chilkat::CkJsonObject.new()
tokenFilePath = "qa_data/tokens/googleDrive.json"
json.LoadFile(tokenFilePath)

oauth2 = Chilkat::CkOAuth2.new()
oauth2.put_AccessToken(json.stringOf("access_token"))
oauth2.put_RefreshToken(json.stringOf("refresh_token"))

oauth2.put_AuthorizationEndpoint("https://accounts.google.com/o/oauth2/v2/auth")
oauth2.put_TokenEndpoint("https://www.googleapis.com/oauth2/v4/token")

#  Replace these with actual values.
oauth2.put_ClientId("GOOGLE-CLIENT-ID")
oauth2.put_ClientSecret("GOOGLE-CLIENT-SECRET")
oauth2.put_Scope("https://www.googleapis.com/auth/drive")

# Use OAuth2 to refresh the access token.
success = oauth2.RefreshAccessToken()
if (success != true)
    print oauth2.lastErrorText() + "\n";
    exit
end

print oauth2.accessTokenResponse() + "\n";

# Save the new access token to our JSON file (so we can refresh it again when needed).
json.UpdateString("access_token",oauth2.accessToken())

fac = Chilkat::CkFileAccess.new()
fac.WriteEntireTextFile(tokenFilePath,json.emit(),"utf-8",false)

print "Access Token Refreshed!" + "\n";