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//! Protocol constants shared between server and client.
/// Fixed chunk size for fragmented transfers (2 MiB).
pub const CHUNK_SIZE: u64 = 2 * 1024 * 1024;
/// Constant sliding-window size for streaming (64 KiB).
pub const STREAM_BUF_SIZE: usize = 64 * 1024;
/// Maximum default concurrent connections in the WASM engine.
pub const DEFAULT_CONCURRENCY: usize = 4;
/// Default maximum retry count for a failed chunk before failing the task.
pub const MAX_RETRIES: u32 = 3;
/// Default cap for a single upload (100 GiB, configurable by the server).
pub const DEFAULT_MAX_UPLOAD_SIZE: u64 = 100 * 1024 * 1024 * 1024;
/// HTTP header advertising the compression algorithm on a body stream.
///
/// Value is a [`CompressionFormat`](crate::compress::CompressionFormat)
/// name (e.g. `zrip`). Mirrored by `Content-Encoding` when applicable.
pub const HEADER_COMPRESS: &str = "x-libfw-compress";
/// HTTP header carrying JSON-encoded [`FileMeta`](crate::metadata::FileMeta)
/// for an upload or download.
pub const HEADER_FILE_META: &str = "x-libfw-file-meta";
/// HTTP header carrying the byte offset to resume an interrupted upload.
pub const HEADER_OFFSET: &str = "x-libfw-offset";
/// HTTP header carrying the (optional) transfer version handshake.
pub const HEADER_PROTOCOL: &str = "x-libfw-protocol";
/// Protocol name used in the handshake header.
pub const PROTOCOL_NAME: &str = "libfw";
/// Protocol version used in the handshake header.
pub const PROTOCOL_VERSION: &str = "1";