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avoid race condition between multiple tile renderers using the same cache

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This commit is contained in:
Gwendolyn 2023-12-27 21:43:56 +01:00
parent 9b3e6727fb
commit ab224b2770
1 changed files with 6 additions and 2 deletions
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8
src/c3nav/mapdata/views.py
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@ -112,10 +112,12 @@ def cache_preview(request, key, last_update, render_fn):
pass
if preview_cache_update != base_cache_key:
if previews_directory.exists():
try:
old_previews_directory = previews_directory.rename(previews_directory.parent /
(previews_directory.name + '_old'))
rmtree(old_previews_directory)
except FileNotFoundError:
pass
else:
try:
data = preview_file.read_bytes()
@ -387,10 +389,12 @@ def tile(request, level, zoom, x, y, access_permissions: Optional[set] = None):
pass
if tile_cache_update != base_cache_key:
if tile_directory.exists():
try:
old_tile_directory = tile_directory.rename(tile_directory.parent /
(tile_directory.name + '_old_tile_dir'))
rmtree(old_tile_directory)
except FileNotFoundError:
pass
else:
try:
data = tile_file.read_bytes()