Added support for token caching and refresh

examples/user_playlists.py

@@ -17,29 +17,37 @@ else:
 
 # Create these via developer.spotify.com/my-applications
 
-client_id = os.getenv('CLIENT_ID')
-client_secret = os.getenv('CLIENT_SECRET')
-redirect_uri = os.getenv('REDIRECT_URI')
+client_id = os.getenv('CLIENT_ID', 'YOUR_CLIENT_ID')
+client_secret = os.getenv('CLIENT_SECRET', 'YOUR_CLIENT_SECRET')
+redirect_uri = os.getenv('REDIRECT_URI', 'YOUR_REDIRECT_URI')
 
 print 'client_id', client_id
 print 'client_secret', client_secret
 print 'redirect_uri', redirect_uri
 
-# Oauth flow
-sp_oauth = oauth2.SpotifyOAuth(client_id, client_secret, redirect_uri)
-auth_url = sp_oauth.get_authorize_url()
-try:
-    subprocess.call(["open", auth_url])
-    print "Opening %s in your browser" % auth_url
-except:
-    print "Please navigate here: %s" % auth_url
+sp_oauth = oauth2.SpotifyOAuth(client_id, client_secret, redirect_uri, cache_path=username)
 
-response = raw_input("The URL you were redirected to: ")
-code = sp_oauth.parse_response_code(response)
-access_token = sp_oauth.get_access_token(code)
+
+# try to get a valid token for this user, from the cache,
+# if not in the cache, the create a new (this will send
+# the user to a web page where they can authorize this app)
+
+token_info = sp_oauth.get_cached_token()
+
+if not token_info:
+    auth_url = sp_oauth.get_authorize_url()
+    try:
+        subprocess.call(["open", auth_url])
+        print "Opening %s in your browser" % auth_url
+    except:
+        print "Please navigate here: %s" % auth_url
+    response = raw_input("The URL you were redirected to: ")
+    code = sp_oauth.parse_response_code(response)
+    token_info = sp_oauth.get_access_token(code)
 
 # Auth'ed API request
+sp = spotipy.Spotify(auth=token_info['access_token'])
 
-sp = spotipy.Spotify(auth=access_token)
 playlists = sp.user_playlists(username)
-pprint.pprint(playlists)
+for playlist in playlists['items']:
+    print playlist['name']