はじめに
こんにちは、Python界の情弱です。最近情弱すぎて全然コード書いてなくて残念です。先日Google Apps APIの勉強会で「OAuth2認証使ってGoogleの各種APIにアクセスしようぜ」っていうことをやった時に、Python組で参加しました。
単純な認証なら素のHTTPやり取りしたほうが楽だよなーというのがわかったのが収穫でした。
一応忘れないようにログを残しておくというエントリ。
参考
コードとか
# -*- coding: utf-8 -*- """ This scripts reqire a third party module 'requests'. You can get it from PyPI, i.e. you can install it using easy_install or pip. http://docs.python-requests.org/en/v0.10.4/ Original source code is written by shin1ogawa, which is in Java. https://gist.github.com/1899391 Materials for this session are avaliable in following URLs: - Hands on material: http://goo.gl/oAhzI - Google APIs Console: https://code.google.com/apis/console/ - Google APIs Explorer: http://code.google.com/apis/explorer/ - OAuth 2.0 Playground: https://code.google.com/oauthplayground/ """ __author__ = "@ymotongpoo" import requests from urllib import urlencode import json from subprocess import Popen client_id = "222222222222.apps.googleusercontent.com" client_secret = "xxxxxxxxxxxxxxxx_YYYYYYY" redirect_uri = "urn:ietf:wg:oauth:2.0:oob" base_url = r"https://accounts.google.com/o/oauth2/" authorization_code = "" access_token = "" """ Retrieving authorization_code from authorization API. """ def retrieve_authorization_code(): authorization_code_req = { "response_type": "code", "client_id": client_id, "redirect_uri": redirect_uri, "scope": (r"https://www.googleapis.com/auth/userinfo.profile" + r" https://www.googleapis.com/auth/userinfo.email" + r" https://www.googleapis.com/auth/calendar") } r = requests.get(base_url + "auth?%s" % urlencode(authorization_code_req), allow_redirects=False) print "下記URLを開いて、アクセス承認後に表示された文字列を入力してください。" url = r.headers.get('location') Popen(["open", url]) authorization_code = raw_input("\nAuthorization Code >>> ") return authorization_code """ Retrieving access_token and refresh_token from Token API. """ def retrieve_tokens(authorization_code): access_token_req = { "code" : authorization_code, "client_id" : client_id, "client_secret" : client_secret, "redirect_uri" : redirect_uri, "grant_type": "authorization_code", } content_length=len(urlencode(access_token_req)) access_token_req['content-length'] = str(content_length) r = requests.post(base_url + "token", data=access_token_req) data = json.loads(r.text) return data """ Sample code of fetching user information from userinfo API. """ def get_userinfo(): global authorization_code authorization_code = retrieve_authorization_code() tokens = retrieve_tokens(authorization_code) access_token = tokens['access_token'] authorization_header = {"Authorization": "OAuth %s" % access_token} r = requests.get("https://www.googleapis.com/oauth2/v2/userinfo", headers=authorization_header) print r.text def get_calendar_list(): global authorization_code global access_token authorization_code = retrieve_authorization_code() tokens = retrieve_tokens(authorization_code) access_token = tokens['access_token'] authorization_header = {"Authorization": "OAuth %s" % access_token} r = requests.get("https://www.googleapis.com/calendar/v3/users/me/calendarList", headers=authorization_header) return r.text def _get_start_end_time(event): try: if event['start'].has_key('date'): start = event['start']['date'] elif event['start'].has_key('dateTime'): start = event['start']['dateTime'] else: start = 'N/A' if event['end'].has_key('date'): end = event['end']['date'] elif event['end'].has_key('dateTime'): end = event['end']['dateTime'] else: end = 'N/A' return start, end except: return event['etag'], event['status'] def get_events_list(): global authorization_code global access_token data = json.loads(get_calendar_list()) for calendar in data['items']: calendar_id = calendar['id'] print calendar['summary'] if authorization_code == "" or access_token == "": authorization_code = retrieve_authorization_code() tokens = retrieve_tokens(authorization_code) access_token = tokens['access_token'] authorization_header = {"Authorization": "OAuth %s" % access_token} url = ("https://www.googleapis.com/calendar/v3/calendars/%s/events?key=%s" % (quote_plus(calendar_id), quote_plus(api_key))) r = requests.get(url, headers=authorization_header) events = json.loads(r.text) for event in events['items']: print event.get('summary', '(Event title not set)') if event['status'] != 'cancelled': start, end = _get_start_end_time(event) print " start : ", start, " end : ", end def main(): get_events_list() if __name__ == '__main__': main()
