Per-BlenderID-user cache.

Different users might have different access rights, and thus access
to different information.

blender_cloud/__init__.py

@@ -47,12 +47,12 @@ if 'pillar' in locals():
     wheels.load_wheels()
 
     pillar = importlib.reload(pillar)
-    cache = importlib.reload(http_cache)
+    cache = importlib.reload(cache)
 else:
     from . import wheels
     wheels.load_wheels()
 
-    from . import pillar, http_cache
+    from . import pillar, cache
 
 
 def register():

blender_cloud/blender.py

@@ -9,7 +9,7 @@ import bpy
 from bpy.types import AddonPreferences, Operator, WindowManager, Scene
 from bpy.props import StringProperty
 
-from . import pillar, gui, http_cache
+from . import pillar, gui
 
 ADDON_NAME = 'blender_cloud'
 
@@ -103,11 +103,6 @@ def register():
     bpy.utils.register_class(BlenderCloudPreferences)
     bpy.utils.register_class(PillarCredentialsUpdate)
 
-    WindowManager.thumbnails_cache = StringProperty(
-        name="Thumbnails cache",
-        subtype='DIR_PATH',
-        default=os.path.join(http_cache.cache_directory(), 'thumbnails'))
-
     WindowManager.blender_cloud_project = StringProperty(
         name="Blender Cloud project UUID",
         default='5672beecc0261b2005ed1a33')  # TODO: don't hard-code this

blender_cloud/cache.py

@@ -18,18 +18,30 @@ log = logging.getLogger(__name__)
 _session = None  # requests.Session object that's set up for caching by requests_session().
 
 
-def cache_directory() -> str:
+def cache_directory(*subdirs) -> str:
     """Returns an OS-specifc cache location, and ensures it exists.
 
     Should be replaced with a call to bpy.utils.user_resource('CACHE', ...)
     once https://developer.blender.org/T47684 is finished.
+
+    :param subdirs: extra subdirectories inside the cache directory.
+
+    >>> cache_directory()
+    '.../blender_cloud/your_username'
+    >>> cache_directory('sub1', 'sub2')
+    '.../blender_cloud/your_username/sub1/sub2'
     """
 
-    # TODO: just use bpy.utils.user_resource('CACHE', ...)
+    from . import pillar
 
-    cache_dir = os.path.join(appdirs.user_cache_dir(appname='Blender', appauthor=False), 'blender_cloud')
+    profile = pillar.blender_id_profile() or {'username': 'anonymous'}
 
-    os.makedirs(cache_dir, exist_ok=True)
+    # TODO: use bpy.utils.user_resource('CACHE', ...)
+    # once https://developer.blender.org/T47684 is finished.
+    user_cache_dir = appdirs.user_cache_dir(appname='Blender', appauthor=False)
+    cache_dir = os.path.join(user_cache_dir, 'blender_cloud', profile['username'], *subdirs)
+
+    os.makedirs(cache_dir, mode=0o700, exist_ok=True)
 
     return cache_dir
 
@@ -42,8 +54,7 @@ def requests_session() -> requests.Session:
     if _session is not None:
         return _session
 
-    cache_dir = cache_directory()
+    cache_name = cache_directory('blender_cloud_http')
-    cache_name = os.path.join(cache_dir, 'blender_cloud_http')
     log.info('Storing cache in %s' % cache_name)
 
     _session = cachecontrol.CacheControl(sess=requests.session(),

blender_cloud/gui.py

@@ -33,7 +33,7 @@ from bpy.props import (BoolProperty, EnumProperty,
                        IntProperty, StringProperty)
 
 import pillarsdk
-from . import async_loop, pillar
+from . import async_loop, pillar, cache
 
 icon_width = 128
 icon_height = 128
@@ -209,11 +209,11 @@ class BlenderCloudBrowser(bpy.types.Operator):
 
     def invoke(self, context, event):
         wm = context.window_manager
-        self.thumbnails_cache = wm.thumbnails_cache
         self.project_uuid = wm.blender_cloud_project
         self.node_uuid = wm.blender_cloud_node
         self.path_stack = []
 
+        self.thumbnails_cache = cache.cache_directory('thumbnails')
         self.mouse_x = event.mouse_x
         self.mouse_y = event.mouse_y
 

blender_cloud/pillar.py

@@ -12,7 +12,7 @@ import pillarsdk.exceptions
 import pillarsdk.utils
 from pillarsdk.utils import sanitize_filename
 
-from . import http_cache
+from . import cache
 
 _pillar_api = None  # will become a pillarsdk.Api object.
 log = logging.getLogger(__name__)
@@ -94,7 +94,7 @@ def pillar_api(pillar_endpoint: str = None) -> pillarsdk.Api:
             from . import blender
             pillar_endpoint = blender.preferences().pillar_server
 
-        pillarsdk.Api.requests_session = http_cache.requests_session()
+        pillarsdk.Api.requests_session = cache.requests_session()
 
         _pillar_api = pillarsdk.Api(endpoint=pillar_endpoint,
                                     username=profile['username'],