| 1 | # -*- coding: utf-8 -*- |
| 2 | from datetime import datetime |
| 3 | import base64 |
| 4 | from pathlib import Path |
| 5 | import sys |
| 6 | |
| 7 | import cv2 |
| 8 | import numpy as np |
| 9 | import segno |
| 10 | |
| 11 | |
| 12 | def build_login_qrcode_path(account_file: str, suffix: str = "login_qrcode") -> Path: |
| 13 | account_path = Path(account_file) |
| 14 | timestamp = datetime.now().strftime("%Y%m%d_%H%M%S") |
| 15 | return account_path.with_name(f"{account_path.stem}_{suffix}_{timestamp}.png") |
| 16 | |
| 17 | |
| 18 | def save_data_url_image(data_url: str, output_path: Path) -> Path: |
| 19 | if not data_url.startswith("data:image/"): |
| 20 | raise ValueError("二维码地址不是 data:image 格式") |
| 21 | |
| 22 | header, encoded = data_url.split(",", 1) |
| 23 | if ";base64" not in header: |
| 24 | raise ValueError("二维码图片不是 base64 编码") |
| 25 | |
| 26 | output_path.parent.mkdir(parents=True, exist_ok=True) |
| 27 | output_path.write_bytes(base64.b64decode(encoded)) |
| 28 | return output_path |
| 29 | |
| 30 | |
| 31 | def remove_qrcode_file(qrcode_path: Path | None) -> bool: |
| 32 | if qrcode_path and qrcode_path.exists(): |
| 33 | qrcode_path.unlink() |
| 34 | return True |
| 35 | return False |
| 36 | |
| 37 | |
| 38 | def decode_qrcode_from_path(qrcode_path: Path) -> str | None: |
| 39 | # Windows 下 cv2.imread 对中文路径不稳定，优先走 numpy+imdecode |
| 40 | image = None |
| 41 | try: |
| 42 | data = np.fromfile(str(qrcode_path), dtype=np.uint8) |
| 43 | if data.size > 0: |
| 44 | image = cv2.imdecode(data, cv2.IMREAD_COLOR) |
| 45 | except Exception: |
| 46 | image = None |
| 47 | if image is None: |
| 48 | image = cv2.imread(str(qrcode_path)) |
| 49 | if image is None: |
| 50 | return None |
| 51 | |
| 52 | detector = cv2.QRCodeDetector() |
| 53 | qrcode_content, _, _ = detector.detectAndDecode(image) |
| 54 | return qrcode_content or None |
| 55 | |
| 56 | |
| 57 | def _print_ascii_qrcode(qrcode) -> None: |
| 58 | border = 1 |
| 59 | rows = list(qrcode.matrix) |
| 60 | empty_line = " " * (len(rows[0]) + border * 2) |
| 61 | print(empty_line) |
| 62 | for row in rows: |
| 63 | line = [" "] * border |
| 64 | line.extend("##" if cell else " " for cell in row) |
| 65 | line.extend([" "] * border) |
| 66 | print("".join(line)) |
| 67 | print(empty_line) |
| 68 | |
| 69 | |
| 70 | def print_terminal_qrcode( |
| 71 | qrcode_content: str, |
| 72 | qrcode_path: Path, |
| 73 | app_name: str, |
| 74 | compact: bool = True, |
| 75 | border: int = 0, |
| 76 | ) -> None: |
| 77 | print() |
| 78 | print(f"请使用{app_name}扫描下方二维码登录：") |
| 79 | qrcode = segno.make(qrcode_content, error="L", boost_error=False) |
| 80 | try: |
| 81 | if hasattr(sys.stdout, "reconfigure"): |
| 82 | sys.stdout.reconfigure(encoding="utf-8") |
| 83 | qrcode.terminal(compact=compact, border=border) |
| 84 | except (UnicodeEncodeError, OSError): |
| 85 | print("当前终端不支持 Unicode 二维码字符，已切换为 ASCII 打印：") |
| 86 | _print_ascii_qrcode(qrcode) |
| 87 | print("在 Windows 下建议使用 Windows Terminal（支持 UTF-8，可完整显示二维码）") |
| 88 | print(f"否则请打开 {qrcode_path} 扫码") |
| 89 | print() |
| 90 |