WebDAV sync support, access tokens, REST control endpoints (#10)

Implement complete WebDAV file serving compatible with various clients from Windows File Explorer to more specialized sync tools. The old control WebSocket has been updated to part-DAV, part REST API instead. Implemented user:pass BASIC auth. Added UI and backend for creating tokens that avoid the need to use actual username and password for requests from CLI or DAV.

tests/test_files_static_streaming.py

@@ -0,0 +1,100 @@
+from pathlib import Path
+from uuid import uuid4
+
+import pytest
+import pytest_asyncio
+from sanic import Sanic
+
+from cista import config, watching
+from cista.fileserver import bp as fileserver_bp
+
+
+@pytest.fixture()
+def setup_storage(tmp_path: Path):
+    config.config = config.Config(path=tmp_path, listen=":0", public=True)
+    watching.state.root = []
+    watching.rootpath = tmp_path
+    yield tmp_path
+    watching.state.root = []
+
+
+@pytest_asyncio.fixture()
+async def client(setup_storage: Path):
+    app = Sanic(f"files-static-test-{uuid4().hex}", strict_slashes=True)
+    app.router.ALLOWED_METHODS = (*app.router.ALLOWED_METHODS, "MKCOL", "MOVE", "COPY", "PROPFIND")
+    app.blueprint(fileserver_bp)
+    yield app.asgi_client
+
+
+@pytest.mark.asyncio
+async def test_get_file_full_content(client, setup_storage: Path):
+    path = setup_storage / "hello.txt"
+    path.write_bytes(b"hello world")
+
+    _, res = await client.get("/files/hello.txt")
+
+    assert res.status_code == 200
+    assert res.body == b"hello world"
+    assert res.headers.get("accept-ranges") == "bytes"
+    assert res.headers.get("content-length") == "11"
+
+
+@pytest.mark.asyncio
+async def test_head_file_returns_headers_without_body(client, setup_storage: Path):
+    path = setup_storage / "hello.txt"
+    path.write_bytes(b"hello world")
+
+    _, res = await client.head("/files/hello.txt")
+
+    assert res.status_code == 200
+    assert not res.body
+    assert res.headers.get("content-length") == "11"
+
+
+@pytest.mark.asyncio
+async def test_get_file_range_start_end(client, setup_storage: Path):
+    path = setup_storage / "hello.txt"
+    path.write_bytes(b"hello world")
+
+    _, res = await client.get("/files/hello.txt", headers={"Range": "bytes=1-4"})
+
+    assert res.status_code == 206
+    assert res.body == b"ello"
+    assert res.headers.get("content-range") == "bytes 1-4/11"
+    assert res.headers.get("content-length") == "4"
+
+
+@pytest.mark.asyncio
+async def test_get_file_suffix_range(client, setup_storage: Path):
+    path = setup_storage / "hello.txt"
+    path.write_bytes(b"hello world")
+
+    _, res = await client.get("/files/hello.txt", headers={"Range": "bytes=-5"})
+
+    assert res.status_code == 206
+    assert res.body == b"world"
+    assert res.headers.get("content-range") == "bytes 6-10/11"
+
+
+@pytest.mark.asyncio
+async def test_head_file_with_range(client, setup_storage: Path):
+    path = setup_storage / "hello.txt"
+    path.write_bytes(b"hello world")
+
+    _, res = await client.head("/files/hello.txt", headers={"Range": "bytes=0-4"})
+
+    assert res.status_code == 206
+    assert not res.body
+    assert res.headers.get("content-range") == "bytes 0-4/11"
+    assert res.headers.get("content-length") == "5"
+
+
+@pytest.mark.asyncio
+async def test_get_file_unsatisfiable_range_returns_416(client, setup_storage: Path):
+    path = setup_storage / "hello.txt"
+    path.write_bytes(b"hello world")
+
+    _, res = await client.get("/files/hello.txt", headers={"Range": "bytes=99-100"})
+
+    assert res.status_code == 416
+    assert res.headers.get("content-range") == "bytes */11"