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248 | def create_app(*, data_dir: Path | None = None) -> FastAPI:
"""Create and configure the FastAPI application.
Args:
data_dir: JoinMarket data directory. Defaults to ``~/.joinmarket-ng``.
Returns:
Configured FastAPI app ready to serve.
"""
app = FastAPI(
title="JoinMarket wallet daemon",
description="JAM-compatible HTTP/WebSocket API for JoinMarket-NG",
version="0.17.0",
swagger_ui_init_oauth={
"clientId": "jmwalletd-local",
"appName": "JoinMarket Wallet Daemon",
"usePkceWithAuthorizationCodeGrant": False,
},
lifespan=_lifespan,
)
allowed_origins = [
"http://localhost",
"http://127.0.0.1",
"http://[::1]",
]
# Allow any port on localhost (common for development/custom setups)
allow_origin_regex = r"^http://(localhost|127\.0\.0\.1|\[::1\])(:\d+)?$"
app.add_middleware(
CORSMiddleware,
allow_origins=allowed_origins,
allow_origin_regex=allow_origin_regex,
allow_methods=["*"],
allow_headers=["*"],
allow_credentials=False,
)
# ------------------------------------------------------------------
# Daemon state singleton.
# ------------------------------------------------------------------
state = DaemonState(data_dir=data_dir)
set_daemon_state(state)
# ------------------------------------------------------------------
# In-memory log ring buffer so jam's Logs page can fetch recent output.
# ------------------------------------------------------------------
install_log_sink()
# ------------------------------------------------------------------
# Cache-busting response headers (matching reference).
# ------------------------------------------------------------------
@app.middleware("http")
async def add_cache_headers(request: Request, call_next: Any) -> Any:
response = await call_next(request)
response.headers["Cache-Control"] = "no-cache, no-store, must-revalidate"
response.headers["Pragma"] = "no-cache"
response.headers["Expires"] = "Sat, 26 Jul 1997 05:00:00 GMT"
return response
# ------------------------------------------------------------------
# Exception handlers.
# ------------------------------------------------------------------
@app.exception_handler(JMWalletDaemonError)
async def daemon_error_handler(request: Request, exc: JMWalletDaemonError) -> JSONResponse:
headers: dict[str, str] = {}
# Add WWW-Authenticate header for auth-related 401/403 errors and label
# service-state 401s distinctly so JAM does not mis-handle them as an
# expired token.
if exc.status_code in (401, 403):
if isinstance(exc, (InvalidToken, InvalidCredentials)):
error_type = "invalid_token"
elif isinstance(exc, InsufficientScope):
error_type = "insufficient_scope"
else:
error_type = "service_state"
headers["WWW-Authenticate"] = (
f'Bearer, error="{error_type}", error_description="{exc.detail}"'
)
return JSONResponse(
status_code=exc.status_code,
content={"message": exc.detail},
headers=headers,
)
# ------------------------------------------------------------------
# Register routers.
# ------------------------------------------------------------------
from jmwalletd.routers.coinjoin import router as coinjoin_router
from jmwalletd.routers.logs import router as logs_router
from jmwalletd.routers.obwatch import router as obwatch_router
from jmwalletd.routers.tumbler import router as tumbler_router
from jmwalletd.routers.wallet import router as wallet_router
from jmwalletd.routers.wallet_data import router as wallet_data_router
from jmwalletd.websocket import router as ws_router
app.include_router(wallet_router, prefix="/api/v1")
app.include_router(wallet_data_router, prefix="/api/v1")
app.include_router(coinjoin_router, prefix="/api/v1")
app.include_router(tumbler_router, prefix="/api/v1")
app.include_router(obwatch_router, prefix="/api/v1")
app.include_router(logs_router, prefix="/api/v1")
# JAM also calls /obwatch/* without the /api/v1 prefix.
app.include_router(obwatch_router)
# WebSocket: available at /ws (direct), /api/v1/ws (prefixed),
# and /jmws (what JAM frontend connects to).
app.include_router(ws_router, prefix="/ws")
app.include_router(ws_router, prefix="/jmws")
app.include_router(ws_router, prefix="/api/v1/ws")
# ------------------------------------------------------------------
# CORS preflight handler for root (restricted to local origins).
# Registered before SPA catch-all so GET / can be served by JAM.
# ------------------------------------------------------------------
@app.options("/")
async def cors_preflight(request: Request) -> JSONResponse:
origin = request.headers.get("Origin")
# Only allow local origins
def is_allowed(o: str | None) -> bool:
return bool(o and (o in allowed_origins or re.match(allow_origin_regex, o)))
allow_origin = origin if is_allowed(origin) else "http://localhost:28183"
return JSONResponse(
content={},
headers={
"Access-Control-Allow-Origin": allow_origin,
"Access-Control-Allow-Methods": "POST",
},
)
# ------------------------------------------------------------------
# Serve JAM static files (if present).
# ------------------------------------------------------------------
# Look in data_dir/jam, system path, or Flatpak prefix /app
jam_dirs = [
state.data_dir / "jam",
Path("/app/share/jmwalletd/jam"),
Path("/usr/share/jmwalletd/jam"),
]
static_dir: Path | None = None
for d in jam_dirs:
if d.exists() and (d / "index.html").exists():
static_dir = d
break
if static_dir:
logger.info("Serving JAM from {}", static_dir)
from starlette.routing import Route
from starlette.staticfiles import StaticFiles as StarletteStaticFiles
# Serve /assets folder
if (static_dir / "assets").exists():
app.mount(
"/assets", StarletteStaticFiles(directory=static_dir / "assets"), name="assets"
)
# SPA catch-all: only intercept GET/HEAD requests so that POST/PUT/etc.
# to API paths that don't exist get a proper 404/405 from the API routers
# rather than being swallowed and served index.html or a 405.
async def serve_spa(request: Request) -> Any:
from fastapi.responses import FileResponse
full_path = request.path_params.get("full_path", "")
path_obj = static_dir / full_path
if full_path:
try:
resolved_path = path_obj.resolve(strict=False)
static_root = static_dir.resolve(strict=True)
if (
resolved_path != static_root
and static_root in resolved_path.parents
and resolved_path.exists()
and resolved_path.is_file()
):
return FileResponse(resolved_path)
except OSError:
# Invalid path input should fall back to index.html
pass
return FileResponse(static_dir / "index.html")
app.router.routes.append(
Route("/{full_path:path}", endpoint=serve_spa, methods=["GET", "HEAD"])
)
logger.info("jmwalletd app created (data_dir={})", state.data_dir)
return app
|