rpc_blob_webdav #

WebDAV storage adapter for rpc_blob. A WebDavBlobRepository implements IBlobRepository against any WebDAV server (Nextcloud, ownCloud, Apache mod_dav, sabre/dav, …), so it drops in wherever rpc_blob_minio or rpc_blob_sqlite do.

dart2js / VM / Flutter compatible — depends only on package:http and package:xml, never dart:io. That makes it usable in the browser / Electron (e.g. an Obsidian plugin) where the S3 adapter's native client can't run.

Quick start #

final storage = WebDavBlobRepository.connect(
  baseUrl: 'https://dav.example.com/remote.php/dav/files/alice/blobs',
  username: 'alice',
  password: 'app-password',
);

// Use it directly...
final client = IBlobClient.repository(repository: storage);

// ...or serve it over rpc_dart.
final server = BlobServiceFactory.createServer(
  transport: transport,
  storage: storage,
);
await server.start();

Auth options:

WebDavBlobRepository(
  baseUrl: Uri.parse('https://dav.example.com/blobs'),
  auth: WebDavAuth.basic(username: 'alice', password: 'pw'),
  // or WebDavAuth.bearer('token'), WebDavAuth.header('...'), WebDavAuth.none()
);

Mapping #

Each collection is a directory under baseUrl and each blob id a resource inside it (<baseUrl>/<collection>/<id>). The collection directory is created on demand with MKCOL.

Length, content type, last-modified and etag come from standard PROPFIND properties. Per-blob version, timestamps and user metadata are stored as WebDAV dead properties (urn:rpc-blob namespace) via PROPPATCH, enabling optimistic concurrency (expectedVersion) and metadata round-trips.

Options #

WebDavOptions(
  trackMetadata: true, // default
)

trackMetadata: true (default) persists version/timestamps/metadata as dead properties. This needs a server that supports dead properties (most do); if a server rejects PROPPATCH, the bytes still store — version just stays 1 and metadata is dropped.

trackMetadata: false turns writes into a single PUT (no pre-HEAD, no PROPPATCH), version is always 1, and expectedVersion is ignored — the right choice for a content-addressed, immutable blob store.