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import subprocess
import threading
import os
def run_fastapi():
"""Run FastAPI backend on port 8000."""
subprocess.run(
[
"uvicorn",
"app.main:app",
"--host",
"0.0.0.0",
"--port",
"8000",
"--proxy-headers",
"--workers",
str(os.getenv("UVICORN_WORKERS", 1)),
],
check=True,
)
def run_gradio():
"""Build and launch Gradio UI on the Space's PORT."""
print("[start] about to launch gradio on PORT=", os.getenv("PORT"), flush=True)
from demo.app import build_ui
demo = build_ui()
demo.launch(
server_name="0.0.0.0",
server_port=int(os.getenv("PORT", "7860")),
show_api=False,
debug=False,
)
if __name__ == "__main__":
# Start FastAPI in background thread
print("[start] launching uvicorn thread...", flush=True)
t = threading.Thread(target=run_fastapi, daemon=True)
t.start()
# Run Gradio in foreground (keeps container alive)
print("[start] about to launch gradio on PORT=", os.getenv("PORT"), flush=True)
run_gradio()
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