Chilkat2-Python

Google Drive Refresh Access Token

Demonstrates how to automatically refresh the access token when it expires. Chilkat2-Python

import sys
import chilkat2

success = False

success = True

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

# 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 = chilkat2.JsonObject()
tokenFilePath = "qa_data/tokens/googleDrive.json"
json.LoadFile(tokenFilePath)

oauth2 = chilkat2.OAuth2()
oauth2.AccessToken = json.StringOf("access_token")
oauth2.RefreshToken = json.StringOf("refresh_token")

rest = chilkat2.Rest()

# Connect using TLS.
bAutoReconnect = True
success = rest.Connect("www.googleapis.com",443,True,bAutoReconnect)

# Provide the authentication credentials (i.e. the access token)
rest.SetAuthOAuth2(oauth2)

# We'll test with a simple request to empty trash.
# If our access token expired, we'll get a 401 response..
jsonResponse = rest.FullRequestNoBody("DELETE","/drive/v3/files/trash")
if (rest.LastMethodSuccess != True):
    print(rest.LastErrorText)
    sys.exit()

# If the access token expired, we'll get a 401 response status with this response body:
# {
#  "error": {
#   "errors": [
#    {
#     "domain": "global",
#     "reason": "authError",
#     "message": "Invalid Credentials",
#     "locationType": "header",
#     "location": "Authorization"
#    }
#   ],
#   "code": 401,
#   "message": "Invalid Credentials"
#  }
# }
if (rest.ResponseStatusCode == 401):

    print("Refreshing access token...")

    oauth2.AuthorizationEndpoint = "https://accounts.google.com/o/oauth2/v2/auth"
    oauth2.TokenEndpoint = "https://www.googleapis.com/oauth2/v4/token"

    #  Replace these with actual values.
    oauth2.ClientId = "GOOGLE-CLIENT-ID"
    oauth2.ClientSecret = "GOOGLE-CLIENT-SECRET"
    oauth2.Scope = "https://www.googleapis.com/auth/drive"

    # Use OAuth2 to refresh the access token.
    success = oauth2.RefreshAccessToken()
    if (success != True):
        print(oauth2.LastErrorText)
        sys.exit()

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

    fac = chilkat2.FileAccess()
    fac.WriteEntireTextFile(tokenFilePath,json.Emit(),"utf-8",False)

    print("Access Token Refreshed!")

    # Retry the request with the new access token..
    jsonResponse = rest.FullRequestNoBody("DELETE","/drive/v3/files/trash")
    if (rest.LastMethodSuccess != True):
        print(rest.LastErrorText)
        sys.exit()

# A successful response will have a status code equal to 204 and the response body is empty.
# (If not successful, then there should be a JSON response body with information..)
if (rest.ResponseStatusCode != 204):
    print("response status code = " + str(rest.ResponseStatusCode))
    print("response status text = " + rest.ResponseStatusText)
    print("response header: " + rest.ResponseHeader)
    print("response JSON: " + jsonResponse)
    sys.exit()

print("Trash Emptied!")