fix: 🐛 serve the asserts from nginx instead of starlette

Starlette cannot serve ranges for static files, see
encode/starlette#950.

Also: fix the rights of the assets directory
Also: add the CORS header (doc)

INSTALL.md

@@ -112,9 +112,17 @@ server {
   listen [::]:80;
   server_name datasets-preview.huggingface.tech;
 
+  add_header 'Access-Control-Allow-Origin' '*';
+
   access_log /var/log/nginx/reverse-access.log;
   error_log /var/log/nginx/reverse-error.log;
 
+  # due to https://github.com/encode/starlette/issues/950, which generates errors in Safari: https://developer.apple.com/library/archive/documentation/AppleApplications/Reference/SafariWebContent/CreatingVideoforSafarioniPhone/CreatingVideoforSafarioniPhone.html#//apple_ref/doc/uid/TP40006514-SW6
+  # we serve the static files from nginx instead of starlette
+  location /assets {
+    root /home/hf/.cache/datasets_preview_backend_assets
+  }
+
   location / {
     proxy_pass http://localhost:8000/;
     proxy_set_header Host $proxy_host;

src/datasets_preview_backend/io/asset.py

@@ -13,7 +13,7 @@
 logger = logging.getLogger(__name__)
 
 DATASET_SEPARATOR = "--"
-ASSET_DIR_MODE = 755
+ASSET_DIR_MODE = 0o755
 
 # set it to the default cache location on the machine, if ASSETS_DIRECTORY is null
 assets_directory = user_cache_dir("datasets_preview_backend_assets") if ASSETS_DIRECTORY is None else ASSETS_DIRECTORY