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| import os | |
| from pathlib import Path | |
| from typing import Literal, Optional, Set, Union | |
| import gradio as gr | |
| from fastapi import HTTPException, Request | |
| from pydantic import BaseModel | |
| class GradioWebhookApp: | |
| """ | |
| ```py | |
| from gradio_webhooks import GradioWebhookApp | |
| app = GradioWebhookApp() | |
| @app.add_webhook("/test_webhook") | |
| async def hello(): | |
| return {"in_gradio": True} | |
| app.ready() | |
| ``` | |
| """ | |
| def __init__( | |
| self, | |
| landing_path: Union[str, Path] = "README.md", | |
| webhook_secret: Optional[str] = None, | |
| ) -> None: | |
| # Use README.md as landing page or provide any markdown file | |
| landing_path = Path(landing_path) | |
| landing_content = landing_path.read_text() | |
| if landing_path.name == "README.md": | |
| landing_content = landing_content.split("---")[-1].strip() | |
| # Simple gradio app with landing content | |
| block = gr.Blocks() | |
| with block: | |
| gr.Markdown(landing_content) | |
| # Launch gradio app: | |
| # - as non-blocking so that webhooks can be added afterwards | |
| # - as shared if launch locally (to receive webhooks) | |
| app, _, _ = block.launch(prevent_thread_lock=True, share=not block.is_space) | |
| self.gradio_app = block | |
| self.fastapi_app = app | |
| self.webhook_paths: Set[str] = set() | |
| # Add auth middleware to check the "X-Webhook-Secret" header | |
| self._webhook_secret = webhook_secret or os.getenv("WEBHOOK_SECRET") | |
| if self._webhook_secret is None: | |
| print( | |
| "\nWebhook secret is not defined. This means your webhook endpoints will be open to everyone." | |
| ) | |
| print( | |
| "To add a secret, set `WEBHOOK_SECRET` as environment variable or pass it at initialization: " | |
| "\n\t`app = GradioWebhookApp(webhook_secret='my_secret', ...)`" | |
| ) | |
| print( | |
| "For more details about Webhook secrets, please refer to https://huggingface.co/docs/hub/webhooks#webhook-secret." | |
| ) | |
| app.middleware("http")(self._webhook_secret_middleware) | |
| def add_webhook(self, path: str): | |
| """Decorator to add a webhook to the server app.""" | |
| self.webhook_paths.add(path) | |
| return self.fastapi_app.get(path) | |
| def ready(self) -> None: | |
| """Set the app as "ready" and block main thread to keep it running.""" | |
| url = ( | |
| self.gradio_app.share_url | |
| if self.gradio_app.share_url is not None | |
| else self.gradio_app.local_url | |
| ).strip("/") | |
| print("\nWebhooks are correctly setup and ready to use:") | |
| print("\n".join(f" - POST {url}{webhook}" for webhook in self.webhook_paths)) | |
| print(f"Checkout {url}/docs for more details.") | |
| self.gradio_app.block_thread() | |
| async def _webhook_secret_middleware(self, request: Request, call_next) -> None: | |
| """Middleware to check "X-Webhook-Secret" header on every webhook request.""" | |
| if request.url.path in self.webhook_paths: | |
| if self._webhook_secret is not None: | |
| request_secret = request.headers.get("x-webhook-secret") | |
| if request_secret is None: | |
| raise HTTPException(401) | |
| if request_secret != self._webhook_secret: | |
| raise HTTPException(403) | |
| return await call_next(request) | |
| class WebhookPayloadEvent(BaseModel): | |
| action: Literal["create", "update", "delete"] | |
| scope: str | |
| class WebhookPayloadRepo(BaseModel): | |
| type: Literal["dataset", "model", "space"] | |
| name: str | |
| private: bool | |
| class WebhookPayloadDiscussion(BaseModel): | |
| num: int | |
| isPullRequest: bool | |
| status: Literal["open", "closed", "merged"] | |
| class WebhookPayload(BaseModel): | |
| event: WebhookPayloadEvent | |
| repo: WebhookPayloadRepo | |
| discussion: Optional[WebhookPayloadDiscussion] | |