Module constants 

Protocol constants shared between server and client.

Constants

CHUNK_SIZE

Fixed chunk size for fragmented transfers (2 MiB).

DEFAULT_CONCURRENCY

Maximum default concurrent connections in the WASM engine.

DEFAULT_DOWNLOAD_CHUNK_SIZE

Default chunk size for parallel (byte-range) downloads — 256 KiB.

DEFAULT_DOWNLOAD_WINDOW

Default in-flight chunk window for a single file’s download.

DEFAULT_MAX_UPLOAD_SIZE

Default cap for a single upload (100 GiB, configurable by the server).

DEFAULT_SESSION_TTL

Server-side TTL after which an unfinished “session” upload temp (and its .blocks range sidecar) is considered stale and garbage-collected.

DEFAULT_UPLOAD_WINDOW

Default in-flight chunk window for a single file’s upload.

HEADER_COMPRESS

HTTP header advertising the compression algorithm on a body stream.

HEADER_FILE_META

HTTP header carrying JSON-encoded FileMeta for an upload or download.

HEADER_FINAL

HTTP header marking an upload request as the FINAL chunk of a file.

HEADER_OFFSET

HTTP header carrying the byte offset to resume an interrupted upload.

HEADER_PROTOCOL

HTTP header carrying the (optional) transfer version handshake.

HEADER_SESSION

HTTP header carrying a per-upload session id.

HEADER_SESSION_STATUS

HTTP header turning a session POST into a status probe.

MAX_RETRIES

Default maximum retry count for a failed chunk before failing the task.

MIN_PARALLEL_DOWNLOAD_BYTES

A file with fewer remaining bytes than this stays on the sequential single-connection download path; larger files use the parallel range-GET path (which has per-request overhead that only pays off at size).

PROTOCOL_NAME

Protocol name used in the handshake header.

PROTOCOL_VERSION

Protocol version used in the handshake header.

STREAM_BUF_SIZE

Constant sliding-window size for streaming (64 KiB).

Functions

protocol_compatible

Whether a received x-libfw-protocol handshake value is compatible with this build of the library.

protocol_header_value

The canonical x-libfw-protocol header value (e.g. libfw/1).