autosync (version 0.2.0)

sync_server: Create an Automerge sync server

Description

Creates a WebSocket server that implements the automerge-repo sync protocol, compatible with JavaScript, Rust, and other Automerge clients.

Usage

sync_server(
  port = 0L,
  host = "127.0.0.1",
  data_dir = tempfile("autosync"),
  auto_create_docs = TRUE,
  storage_id = NULL,
  tls = NULL,
  auth = NULL,
  share = NA
)

Value

An autosync_server object inheriting from 'nanoServer', with $start() and $close() methods.

Arguments

port

Port to listen on. Default 0 (binds to a random available port). The actual URL is retrieved via server$url.

host

Host address to bind to. Default "127.0.0.1" (localhost).

data_dir

Directory for document storage. Defaults to a session-temporary directory, so documents do not persist across R sessions. Supply an explicit path to persist documents across sessions.

auto_create_docs

Logical, whether to auto-create documents when clients request unknown document IDs. Default TRUE.

storage_id

Optional storage ID for this server. If NULL (default), generates a new persistent identity. Set to NA for an ephemeral server (no persistence identity).

tls

(optional) for secure wss:// connections, a TLS configuration object created by nanonext::tls_config().

auth

Optional authentication configuration created by auth_config(). When provided, clients must include a valid JWT (ID token) as a Bearer token in the Authorization header of the WebSocket upgrade request. Connections without valid credentials are rejected immediately. Note: TLS is required when authentication is enabled to protect tokens.

share

Controls document sharing policy for connected clients. This unified parameter governs both proactive document announcement (pushing documents to clients) and access control (allowing clients to request documents). Accepts one of:

• NA (default) — never announce but allow all requests.

• TRUE — announce all documents to all clients and allow all requests.

• FALSE — never announce and deny all requests (sends doc-unavailable).

• A function with signature function(client_id, doc_id) returning TRUE (announce and allow), NA (allow on request only), or FALSE (deny access). Called per client and per document.

Details

The returned server inherits from nanonext's nanoServer class and provides $start() and $close() methods for non-blocking operation.

Examples

if (FALSE) { # interactive()
# Create and start a server
server <- sync_server()
server$start()

# Server is now running in the background
# ...do other work...

# Stop when done
server$close()

# With TLS for secure connections
cert <- nanonext::write_cert()
tls <- nanonext::tls_config(server = cert$server)
server <- sync_server(tls = tls)
server$start()
server$url
server$close()

# Server with OIDC authentication (requires TLS)
cert <- nanonext::write_cert()
tls <- nanonext::tls_config(server = cert$server)
server <- sync_server(
  tls = tls,
  auth = auth_config(
    client_id = "123456789.apps.googleusercontent.com",
    allowed_domains = "mycompany.com"
  )
)
}