ws50529
149 lines
4.1 KiB
Python
Executable File
149 lines
4.1 KiB
Python
Executable File
from fastapi import FastAPI, File, Form, HTTPException, Request, UploadFile
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from fastapi.responses import RedirectResponse, StreamingResponse
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from fastapi.staticfiles import StaticFiles
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from dea.bode import calculate_bode_compare_response, calculate_bode_response
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from dea.config import (
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BODE_MAX_MULTIPLIER,
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BODE_POINTS,
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MAX_COEFFICIENTS,
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MAX_CSV_BYTES,
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MAX_PLOT_POINTS,
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NYQUIST_MARGIN,
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)
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from dea.csv_processing import (
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downsample_for_plot,
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filter_preview_response,
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filtered_csv_data,
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filtered_csv_text,
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read_csv_upload,
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)
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from dea.filter_design import design_response
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from dea.mcu import list_mcu_ports_response, write_mcu_command_response
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from dea.schemas import BodeCompareParams, BodeParams, DesignParams, MCUWriteParams
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from dea.security import (
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SECURITY_HEADERS,
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add_security_headers,
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is_lan_or_loopback,
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lan_denied_response,
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)
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from dea.validation import (
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normalize_coefficients,
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parse_coefficients,
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require_finite,
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validate_coefficients,
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validate_frequency,
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)
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app = FastAPI(title="Difference Equation Analyzer API")
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@app.middleware("http")
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async def restrict_to_lan(request: Request, call_next):
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client_ip = request.client.host if request.client else None
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if not is_lan_or_loopback(client_ip):
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return lan_denied_response()
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response = await call_next(request)
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return add_security_headers(response)
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# 掛載靜態網頁檔案，將預設首頁導向到 /ui/
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app.mount("/ui", StaticFiles(directory="static", html=True), name="static")
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@app.get("/")
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def redirect_to_ui():
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return RedirectResponse(url="/ui/")
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@app.post("/api/design")
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def design_filter(params: DesignParams):
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try:
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return design_response(params)
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=400, detail=str(e))
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@app.post("/api/bode")
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def calculate_bode(params: BodeParams):
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try:
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return calculate_bode_response(params)
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=400, detail=str(e))
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@app.post("/api/bode/compare")
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def calculate_bode_compare(params: BodeCompareParams):
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try:
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return calculate_bode_compare_response(params)
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=400, detail=str(e))
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@app.post("/api/filter")
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async def filter_csv(
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file: UploadFile = File(...),
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b: str = Form(...),
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a: str = Form(...),
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col_idx: int = Form(0),
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):
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try:
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b_vals = parse_coefficients(b, "b")
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a_vals = parse_coefficients(a, "a")
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df = await read_csv_upload(file)
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return filter_preview_response(df, b_vals, a_vals, col_idx)
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=400, detail=f"CSV處理失敗: {str(e)}")
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@app.get("/api/mcu/ports")
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def list_mcu_ports():
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try:
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return list_mcu_ports_response()
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"MCU 串口清單讀取失敗: {str(e)}")
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@app.post("/api/mcu/write")
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def write_mcu_command(params: MCUWriteParams):
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try:
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return write_mcu_command_response(params)
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=500, detail=f"MCU 指令傳送失敗: {str(e)}")
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@app.post("/api/filter/download")
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async def filter_csv_download(
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file: UploadFile = File(...),
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b: str = Form(...),
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a: str = Form(...),
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col_idx: int = Form(0),
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):
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try:
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b_vals = parse_coefficients(b, "b")
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a_vals = parse_coefficients(a, "a")
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df = await read_csv_upload(file)
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csv_text = filtered_csv_text(df, b_vals, a_vals, col_idx)
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return StreamingResponse(
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iter([csv_text]),
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media_type="text/csv",
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headers={"Content-Disposition": "attachment; filename=filtered_output.csv"},
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)
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except HTTPException:
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raise
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except Exception as e:
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raise HTTPException(status_code=400, detail=f"CSV處理失敗: {str(e)}")
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