Move common google api auth functionality into common

So we can reuse it for google sheets

common/common/googleapis.py

@@ -0,0 +1,62 @@
+
+import time
+
+import gevent
+import requests
+
+
+class GoogleAPIClient(object):
+	"""Manages access to google apis and maintains an active access token.
+	Make calls using client.request(), which is a wrapper for requests.request().
+	"""
+
+	ACCESS_TOKEN_ERROR_RETRY_INTERVAL = 10
+	# Refresh token 10min before it expires (it normally lasts an hour)
+	ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY = 600
+
+	def __init__(self, client_id, client_secret, refresh_token):
+		self.client_id = client_id
+		self.client_secret = client_secret
+		self.refresh_token = refresh_token
+
+		self._first_get_access_token = gevent.spawn(self.get_access_token)
+
+	@property
+	def access_token(self):
+		"""Blocks if access token unavailable yet"""
+		self._first_get_access_token.join()
+		return self._access_token
+
+	def get_access_token(self):
+		"""Authenticates against google's API and retrieves a token we will use in
+		subsequent requests.
+		This function gets called automatically when needed, there should be no need to call it
+		yourself."""
+		while True:
+			try:
+				start_time = time.time()
+				resp = requests.post('https://www.googleapis.com/oauth2/v4/token', data={
+					'client_id': self.client_id,
+					'client_secret': self.client_secret,
+					'refresh_token': self.refresh_token,
+					'grant_type': 'refresh_token',
+				})
+				resp.raise_for_status()
+				data = resp.json()
+				self._access_token = data['access_token']
+				expires_in = (start_time + data['expires_in']) - time.time()
+				if expires_in < self.ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY:
+					self.logger.warning("Access token expires in {}s, less than normal leeway time of {}s".format(
+						expires_in, self.ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY,
+					))
+				gevent.spawn_later(expires_in - self.ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY, self.get_access_token)
+			except Exception:
+				self.logger.exception("Failed to fetch access token, retrying")
+				self.wait(self.ACCESS_TOKEN_ERROR_RETRY_INTERVAL)
+			else:
+				break
+
+	def request(self, method, url, headers={}, **kwargs):
+		# merge in auth header
+		headers = dict(headers, Authorization='Bearer {}'.format(self.access_token))
+		return requests.request(method, url, headers=headers, **kwargs)

cutter/cutter/youtube.py

@@ -1,63 +1,15 @@
 
 import logging
-import time
 
-import gevent
-import requests
+from common.googleapis import GoogleAPIClient
 
 
 class Youtube(object):
-	"""Manages access to youtube and maintains an active access token"""
-
-	ACCESS_TOKEN_ERROR_RETRY_INTERVAL = 10
-	# Refresh token 10min before it expires (it normally lasts an hour)
-	ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY = 600
+	"""Manages youtube API operations"""
 
 	def __init__(self, client_id, client_secret, refresh_token):
 		self.logger = logging.getLogger(type(self).__name__)
-		self.client_id = client_id
-		self.client_secret = client_secret
-		self.refresh_token = refresh_token
-
-		self._first_get_access_token = gevent.spawn(self.get_access_token)
-
-	@property
-	def access_token(self):
-		"""Blocks if access token unavailable yet"""
-		self._first_get_access_token.join()
-		return self._access_token
-
-	def get_access_token(self):
-		"""Authenticates against the youtube API and retrieves a token we will use in
-		subsequent requests.
-		This function gets called automatically when needed, there should be no need to call it
-		yourself."""
-		while True:
-			try:
-				start_time = time.time()
-				resp = requests.post('https://www.googleapis.com/oauth2/v4/token', data={
-					'client_id': self.client_id,
-					'client_secret': self.client_secret,
-					'refresh_token': self.refresh_token,
-					'grant_type': 'refresh_token',
-				})
-				resp.raise_for_status()
-				data = resp.json()
-				self._access_token = data['access_token']
-				expires_in = (start_time + data['expires_in']) - time.time()
-				if expires_in < self.ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY:
-					self.logger.warning("Access token expires in {}s, less than normal leeway time of {}s".format(
-						expires_in, self.ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY,
-					))
-				gevent.spawn_later(expires_in - self.ACCESS_TOKEN_REFRESH_TIME_BEFORE_EXPIRY, self.get_access_token)
-			except Exception:
-				self.logger.exception("Failed to fetch access token, retrying")
-				self.wait(self.ACCESS_TOKEN_ERROR_RETRY_INTERVAL)
-			else:
-				break
-
-	def auth_headers(self):
-		return {'Authorization': 'Bearer {}'.format(self.access_token)}
+		self.client = GoogleAPIClient(client_id, client_secret, refresh_token)
 
 	def upload_video(self, title, description, tags, data, hidden=False):
 		"""Data may be a string, file-like object or iterator. Returns id."""
@@ -72,7 +24,7 @@ class Youtube(object):
 			json['status'] = {
 				'privacyStatus': 'unlisted',
 			}
-		resp = requests.post(
+		resp = self.client.request('POST',
 			'https://www.googleapis.com/upload/youtube/v3/videos',
 			headers=self.auth_headers(),
 			params={
@@ -83,7 +35,7 @@ class Youtube(object):
 		)
 		resp.raise_for_status()
 		upload_url = resp.headers['Location']
-		resp = requests.post(upload_url, headers=self.auth_headers(), data=data)
+		resp = self.client.request('POST', upload_url, headers=self.auth_headers(), data=data)
 		resp.raise_for_status()
 		return resp.json()['id']
 
@@ -97,7 +49,7 @@ class Youtube(object):
 		# Break up into groups of 10 videos. I'm not sure what the limit is so this is reasonable.
 		for i in range(0, len(ids), 10):
 			group = ids[i:i+10]
-			resp = requests.get(
+			resp = self.client.request('GET',
 				'https://www.googleapis.com/youtube/v3/videos',
 				headers=self.auth_headers(),
 				params={