FastAPI Call Code Understanding @router.post("/api/chat") async def chat( request: Request, audio: Optional[UploadFile] = File(None), text: Optional[str] = Form(None) ): """ Handle chat requests – supports both audio and text input """ try: # Handle audio input if audio: # Validate file extension file_extension = audio.filename.split('.')[-1].lower() if file_extension not in settings.ALLOWED_EXTENSIONS: raise HTTPException( status_code=400, detail=f"File type not allowed. Allowed types: {settings.ALLOWED_EXTENSIONS}" ) # Save uploaded audio file file_path = os.path.join(settings.UPLOAD_FOLDER, audio.filename) os.makedirs(settings.UPLOAD_FOLDER, exist_ok=True) with open(file_path, "wb") as f: content = await audio.read() f.write(content) # Transcribe audio to text transcription = await speech_service.transcribe_audio(file_path) # Clean up uploaded file if os.path.exists(file_path): os.remove(file_path) return

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