Example python script for REST based OAuth2 for Google Services

googleAuthTest.py

#!/usr/bin/env python

import requests
import json
import webbrowser
import urllib

# Goole app setup with "Other" category of credentials, set client id and secret here
# Example methods are in order:
# get_code() spawn a browser and ask for the user to login
# get_token() will take the code from the browser (via manual copy / paste) and generate an auth token
# refresh_token() will use the refresh token from get_token() generate a new auth token

client_id = "<client_id>"
client_secret = "<client_secret>"

def get_code():
    scopes = ["https://www.googleapis.com/auth/drive", "https://www.googleapis.com/auth/spreadsheets", "https://www.googleapis.com/auth/drive.photos.readonly"]
    scope_string = " ".join(scopes)
    url = "https://accounts.google.com/o/oauth2/v2/auth?scope=%s&access_type=offline&include_granted_scopes=true&state=state_parameter_passthrough_value&redirect_uri=urn:ietf:wg:oauth:2.0:oob&response_type=code&client_id=%s&prompt=consent" % (urllib.quote(scope_string, safe=''), client_id)

    webbrowser.open(url, new=2)

def get_token(access_code):
    headers = {}
    params = {}
    params["code"] = access_code
    params["client_id"] = client_id
    params["client_secret"] = client_secret
    params["redirect_uri"] = "urn:ietf:wg:oauth:2.0:oob"
    params["grant_type"] = "authorization_code"

    response = requests.post("https://www.googleapis.com/oauth2/v4/token", headers=headers, params=params)

    return json.loads(response.text)

def refresh_token(refresh_token):
    headers = {}
    params = {}
    params["refresh_token"] = refresh_token
    params["client_id"] = client_id
    params["client_secret"] = client_secret
    params["grant_type"] = "refresh_token"

    response = requests.post("https://www.googleapis.com/oauth2/v4/token", headers=headers, params=params)

    return json.loads(response.text)