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Read through the Documentation or check out the Samples.
ID-list file routing and fallback
download_id_list_file_api selects the preferred base URL for file downloads.
Enable fallback_to_statsig_api to try the original file URL from the manifest
after an overridden request fails with a retryable network error, provided that
URL belongs to the trusted HTTPS OpenAI CDN origin:
let options = statsig_rust::StatsigOptions {
download_id_list_file_api: Some("http://statsig-proxy:8080".to_string()),
fallback_to_statsig_api: Some(true),
..Default::default()
};
Fallback accepts only https://statsigcdn.openai.com with the default port or
explicit :443. Fallback sends no request or SDK credentials to other manifest
origins; the original request error is returned. Fallback does not follow redirects.
Custom network providers must implement send_without_redirects; otherwise the
fallback returns an error without sending a request.
All ID-list file downloads, including direct CDN, proxy, and fallback requests,
preserve the URL's path and query except for legacy range parameters, which are
removed. Every request sends Range, statsig-id-list-file-size, and
Accept-Encoding: identity headers, preserving the file identity and byte offset
for incremental updates. Partial responses require a valid Content-Range
matching the requested offset and received body length. They may use 206 or,
for compatibility, 200. A 200 without Content-Range means the complete
available file from byte zero; the SDK applies only bytes after the requested
offset. Available bytes may be behind or ahead of the manifest: the SDK advances
by bytes actually applied and keeps polling while below the advertised size.
Responses that make no progress or have inconsistent ranges use the remaining
retry budget without publishing the refresh. Partial bodies without
Content-Range are unsupported; a malformed header is rejected even when the
status is 200.
Set fallback_to_statsig_api to Some(false) or leave it unset to keep file
downloads strictly on the selected destination. There is no fallback attempt when
the override resolves to the original URL, no override is set, or the request
fails with an authentication rejection (401/403) or another non-retryable error.
Response parsing failures do not trigger fallback. This uses the existing option
across language bindings; wrappers that disable it continue to opt out.
A successful proxy request makes no additional request. Primary and fallback requests share the same per-file attempt budget (three attempts by default). The next synchronization starts with the configured override again.
Read-only data stores
Rust data stores can override DataStoreTrait::is_read_only(); Python DataStore
subclasses can override the synchronous is_read_only() method:
def is_read_only(self) -> bool:
return not self.is_leader
The default is False, preserving existing writable stores. Return True for a
follower that only consumes shared cache entries. Bootstrap/polling reads and
config hydration/evaluation remain enabled, but full network responses no longer
build or compress hydrated cache snapshots or call the datastore's write methods.
Delta responses continue to skip snapshot writes. Keep the role stable during an
update. A failing Python capability check is treated as read-only.
Packages
Protobuf-typed reads and publication callbacks are described in Typed dynamic configs, with Python, Node, and Go API guides. See Python mmap preload for optional returnable hash precomputation when loading writer-published artifacts.
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3 maintainers
Release files for oai-statsig-python-core 0.37.0b202610171823
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Source distribution (sdist)
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Built distributions (wheels)
Total release size: 129.8 MB
Release files / oai_statsig_python_core-0.37.0b202610171823.tar.gz
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