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Running on Zero
Running on Zero
| """Mount Gradio with HTTP protection inside its existing signed OAuth session. | |
| Coordinator integration (after demo.queue(...)):: | |
| from fastapi import FastAPI | |
| import security | |
| import uvicorn | |
| app = security.mount_private_gradio( | |
| FastAPI(), demo, path="/", allowed_paths=[ui.STAGING], | |
| theme=theme_mod.build(), css=ui.stylesheet()) | |
| uvicorn.run(app, host="0.0.0.0", port=int(os.getenv("PORT", "7860"))) | |
| Use this instead of demo.launch(). The public root/config must contain only | |
| an anonymous-safe shell; private data must be loaded by authenticated events. | |
| HF checks Frockemasters membership at login (validated README metadata). | |
| No live membership lookup occurs: removal does not invalidate issued cookies | |
| or cancel already-running jobs/streams. Cookie replay remains possible until | |
| OAuth expiry; logout only clears the browser's cookie. Rotate the OAuth secret | |
| to invalidate all sessions. This module must ship alongside auth.py/README.md. | |
| """ | |
| import math | |
| import os | |
| import gradio.oauth as oauth | |
| import time | |
| import gradio as gr | |
| from starlette.middleware import Middleware | |
| from starlette.middleware.sessions import SessionMiddleware | |
| from starlette.responses import JSONResponse | |
| from starlette.routing import Mount | |
| from urllib.parse import parse_qs | |
| try: | |
| from . import auth | |
| except ImportError: | |
| import auth | |
| def session_username(session): | |
| """Read only a session verified by Gradio's SessionMiddleware.""" | |
| if not isinstance(session, dict): | |
| return None | |
| info = session.get("oauth_info") | |
| if not isinstance(info, dict): | |
| return None | |
| expiry = info.get("expires_at") | |
| if (type(expiry) not in (int, float) or not math.isfinite(expiry) | |
| or expiry <= time.time()): | |
| return None | |
| profile = info.get("userinfo") | |
| if not isinstance(profile, dict): | |
| return None | |
| name = profile.get("preferred_username") | |
| return name if isinstance(name, str) and name.strip() else None | |
| class PrivateGradioMiddleware: | |
| """Default deny new routes; exempt only the anonymous shell and assets.""" | |
| PUBLIC = frozenset({"/", "/config", "/config/", "/theme.css", "/favicon.ico", | |
| "/robots.txt", "/manifest.json", "/login/huggingface", | |
| "/login/callback", "/logout", | |
| # Gradio calls this from localhost before launch() can | |
| # report readiness. It triggers component startup only; | |
| # it does not expose queue jobs, files or user data. | |
| "/gradio_api/startup-events"}) | |
| ASSETS = ("/assets/", "/static/", "/svelte/") | |
| def __init__(self, app): | |
| self.app = app | |
| async def __call__(self, scope, receive, send): | |
| if scope["type"] not in ("http", "websocket"): | |
| return await self.app(scope, receive, send) | |
| path = scope["path"] | |
| root = scope.get("root_path", "") | |
| if root and path.startswith(root + "/"): | |
| path = path[len(root):] | |
| public = (scope["type"] == "http" and scope["method"] in ("GET", "HEAD") | |
| and (path in self.PUBLIC or path.startswith(self.ASSETS))) | |
| # Deep links restore saved component state into otherwise-public config. | |
| if "deep_link" in parse_qs(scope.get("query_string", b"").decode("latin1"), | |
| keep_blank_values=True): | |
| public = False | |
| if "\\" in path or any(part in (".", "..") for part in path.split("/")): | |
| public = False | |
| if not public and not session_username(scope.get("session")): | |
| if scope["type"] == "websocket": | |
| await send({"type": "websocket.close", "code": 4401}) | |
| return | |
| return await JSONResponse({"detail": auth.MESSAGE}, status_code=401, | |
| headers={"Cache-Control": "no-store"})(scope, receive, send) | |
| async def private_send(message): | |
| if message["type"] == "http.response.start" and (not public or path in {"/", "/config", "/config/"}): | |
| message["headers"] = [(k, v) for k, v in message.get("headers", []) | |
| if k.lower() != b"cache-control"] | |
| message["headers"].append((b"cache-control", b"private, no-store")) | |
| await send(message) | |
| await self.app(scope, receive, private_send) | |
| def mount_private_gradio(app, demo, *, path="/", **kwargs): | |
| """Mount before serving; never add a second session decoder/signing key.""" | |
| gate = auth.for_environment() | |
| if gate.required: | |
| if any(getattr(oauth, key) != os.environ[key] for key in auth.OAUTH_VARIABLES): | |
| raise RuntimeError("OAuth environment changed after Gradio import; restart required") | |
| if not demo.expects_oauth: | |
| raise RuntimeError("Private Gradio requires a gr.LoginButton") | |
| if "app_kwargs" in kwargs or "auth" in kwargs or "auth_dependency" in kwargs: | |
| raise ValueError("Authentication/app middleware is owned by security helper") | |
| kwargs["app_kwargs"] = {"middleware": [Middleware(PrivateGradioMiddleware)]} | |
| result = gr.mount_gradio_app(app, demo, path=path, **kwargs) | |
| if gate.required: | |
| child = next(route.app for route in reversed(result.routes) | |
| if isinstance(route, Mount) and route.path == path.rstrip("/")) | |
| classes = [entry.cls for entry in child.user_middleware] | |
| if (SessionMiddleware not in classes or | |
| classes.index(SessionMiddleware) > classes.index(PrivateGradioMiddleware)): | |
| raise RuntimeError("Gradio session middleware must wrap HTTP protection") | |
| return result | |
| def private_app_kwargs(demo): | |
| """Middleware configuration for Blocks.launch on the hosted Space. | |
| ZeroGPU discovers registered handlers from Blocks.launch, so production | |
| must use that path rather than mounting Gradio under a separate Uvicorn | |
| app. Gradio still installs its signed SessionMiddleware around this list. | |
| """ | |
| gate = auth.for_environment() | |
| if not gate.required or not demo.expects_oauth: | |
| raise RuntimeError("Private Space launch requires configured OAuth") | |
| return {"middleware": [Middleware(PrivateGradioMiddleware)]} | |