Create app.py

app.py

@@ -0,0 +1,49 @@
+from fastapi import FastAPI, UploadFile, File, BackgroundTasks
+from fastapi.responses import HTMLResponse
+import shutil
+import os
+import uuid
+from pathlib import Path
+import time
+
+app = FastAPI()
+TEMP_DIR = Path("/tmp/uploads")
+TEMP_DIR.mkdir(parents=True, exist_ok=True)
+
+# Background cleanup: delete files older than 1 hour
+def cleanup_old_files():
+    now = time.time()
+    for f in TEMP_DIR.iterdir():
+        if now - f.stat().st_mtime > 3600:
+            try:
+                f.unlink()
+            except Exception:
+                pass
+
+@app.get("/", response_class=HTMLResponse)
+async def main():
+    html_path = Path(__file__).parent / "static" / "index.html"
+    return html_path.read_text()
+
+@app.post("/upload")
+async def upload_temp_file(
+    background_tasks: BackgroundTasks,
+    file: UploadFile = File(...),
+):
+    # schedule cleanup
+    background_tasks.add_task(cleanup_old_files)
+
+    unique_name = f"{uuid.uuid4()}_{file.filename}"
+    dest_path = TEMP_DIR / unique_name
+
+    with dest_path.open("wb") as buf:
+        shutil.copyfileobj(file.file, buf)
+
+    return {"filename": unique_name, "url": f"/files/{unique_name}"}
+
+@app.get("/files/{filename}")
+async def serve_file(filename: str):
+    file_path = TEMP_DIR / filename
+    if not file_path.exists():
+        return {"error": "File not found"}
+    return FileResponse(str(file_path))