68 lines
1.9 KiB
Python
68 lines
1.9 KiB
Python
"""HTTP Cache management.
|
|
|
|
This module configures a cached session for the Requests package.
|
|
It allows for filesystem-based caching of HTTP requests.
|
|
|
|
Requires the 3rd party packages CacheControl and lockfile.
|
|
"""
|
|
|
|
import os
|
|
import logging
|
|
import requests
|
|
import cachecontrol
|
|
from cachecontrol.caches import FileCache
|
|
|
|
from . import appdirs
|
|
|
|
log = logging.getLogger(__name__)
|
|
_session = None # requests.Session object that's set up for caching by requests_session().
|
|
|
|
|
|
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'
|
|
"""
|
|
|
|
from . import pillar
|
|
|
|
profile = pillar.blender_id_profile()
|
|
if profile:
|
|
username = profile.username
|
|
else:
|
|
username = 'anonymous'
|
|
|
|
# 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', username, *subdirs)
|
|
|
|
os.makedirs(cache_dir, mode=0o700, exist_ok=True)
|
|
|
|
return cache_dir
|
|
|
|
|
|
def requests_session() -> requests.Session:
|
|
"""Creates a Requests-Cache session object."""
|
|
|
|
global _session
|
|
|
|
if _session is not None:
|
|
return _session
|
|
|
|
cache_name = cache_directory('blender_cloud_http')
|
|
log.info('Storing cache in %s' % cache_name)
|
|
|
|
_session = cachecontrol.CacheControl(sess=requests.session(),
|
|
cache=FileCache(cache_name))
|
|
|
|
return _session
|