def get_manifest(self, app_id, depot_id, manifest_gid, decrypt=True):
key = (app_id, depot_id, manifest_gid)
cached_manifest = UserCacheFile("manifests/{}_{}_{}".format(*key))
if key not in self.manifests:
self.get_cached_manifest(*key)
# if we still dont have a manifest, load it from CDN
if key not in self.manifests:
manifest = CDNClient.get_manifest(self, app_id, depot_id,
manifest_gid, decrypt)
# cache the manifest
with cached_manifest.open('wb') as fp:
# if we have the key decrypt the manifest before caching
if manifest.filenames_encrypted and manifest.depot_id in self.depot_keys:
manifest = self.DepotManifestClass(
self, manifest.app_id,
manifest.serialize(compress=False))
manifest.decrypt_filenames(
self.depot_keys[manifest.depot_id])
fp.write(manifest.serialize(compress=False))
return self.manifests[key]
def check_for_changes(self):
changefile = UserCacheFile('last_change_number')
change_number = 0
if changefile.exists():
try:
change_number = int(changefile.read_full())
except:
changefile.remove()
self._LOG.debug("Checking PICS for app changes")
resp = self.steam.get_changes_since(change_number, True, False)
if resp.force_full_app_update:
change_number = 0
if resp.current_change_number != change_number:
with changefile.open('w') as fp:
fp.write(str(resp.current_change_number))
changed_apps = set((entry.appid for entry in resp.app_changes))
if change_number == 0 or changed_apps:
self._LOG.debug("Checking for outdated cached appinfo files")
for appinfo_file in UserCacheDirectory('appinfo').iter_files(
'*.json'):
app_id = int(appinfo_file.filename[:-5])
if change_number == 0 or app_id in changed_apps:
appinfo_file.remove()
def get_cached_manifest(self, app_id, depot_id, manifest_gid):
key = (app_id, depot_id, manifest_gid)
if key in self.manifests:
return self.manifests[key]
# if we don't have the manifest loaded, check cache
cached_manifest = UserCacheFile("manifests/{}_{}_{}".format(app_id, depot_id, manifest_gid))
# we have a cached manifest file, load it
if cached_manifest.exists():
with cached_manifest.open('r+b') as fp:
try:
manifest = self.DepotManifestClass(self, app_id, fp.read())
except Exception as exp:
self._LOG.debug("Error parsing cached manifest: %s", exp)
else:
# if its not empty, load it
if manifest.gid > 0:
self.manifests[key] = manifest
# update cached file if we have depot key for it
if manifest.filenames_encrypted and manifest.depot_id in self.depot_keys:
manifest.decrypt_filenames(self.depot_keys[manifest.depot_id])
fp.seek(0)
fp.write(manifest.serialize(compress=False))
fp.truncate()
return manifest
# empty manifest files shouldn't exist, handle it gracefully by removing the file
if key not in self.manifests:
self._LOG.debug("Found cached manifest, but encountered error or file is empty")
cached_manifest.remove()
def get_manifest(self, app_id, depot_id, manifest_gid, decrypt=True):
key = (app_id, depot_id, manifest_gid)
cached_manifest = UserCacheFile("manifests/{}_{}_{}".format(*key))
if decrypt and depot_id not in self.depot_keys:
self.get_depot_key(app_id, depot_id)
manifest = self.get_cached_manifest(*key)
# if manifest not cached, download from CDN
if not manifest:
manifest = CDNClient.get_manifest(self, app_id, depot_id, manifest_gid, decrypt)
# cache the manifest
with cached_manifest.open('wb') as fp:
fp.write(manifest.serialize(compress=False))
return self.manifests[key]
