Rust SDK 0.11.6 | Fastly Documentation

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August 15, 2025

Request metadata: use per-handle calls, rather than global calls, for most metadata.
SendErrorCause::DestinationNotFound is now returned when a request is sent to an invalid backend, instead of SendErrorCause::InternalError.
Clarified that Request::get_content_type can panic if the Content-Type header contains an invalid MIME type.
Added Body::known_length to get the length of a body if it is known.
Clarified that manually-configured cipher suites only apply to TLS 1.0 - 1.2 connections.
Request::get_client_ip_addr/Request::get_server_ip_addr now return None for downstream requests without IPs
Experimental: added support for processing multiple requests sequentially in a session.

Prior change: Rust SDK 0.11.5