feat(auth): print a scannable ASCII QR in the terminal

WSL and --no-browser never showed the PNG, and placeholder Chinese cookies crashed urllib latin-1 headers before the code was issued.

reaction_board/bilibili/auth.py

@@ -45,12 +45,30 @@ def strip_identity(cookie: str) -> str:
     return "; ".join(kept)
 
 
+def _is_latin1(value: str) -> bool:
+    try:
+        value.encode("latin-1")
+    except UnicodeEncodeError:
+        return False
+    return True
+
+
+def cookie_header(cookie: str, *, auth: bool = False) -> str:
+    """生成可放入 HTTP 头的 Cookie。占位中文、缺 ``=`` 的片段和非 latin-1 字段都会丢掉。"""
+    source = cookie if auth else strip_identity(cookie)
+    return "; ".join(
+        f"{key}={value}"
+        for key, value in parse_cookie(source)
+        if _is_latin1(key) and _is_latin1(value)
+    )
+
+
 def make_headers(cfg: dict, auth: bool = False, *, referer: str | None = None) -> dict[str, str]:
     """构造与 ``data/raw-request.txt`` 对齐的 B 站 Web 请求头。"""
     return {
         "accept": "*/*",
         "accept-language": "zh-CN,zh;q=0.9,en-US;q=0.8,en;q=0.7",
-        "cookie": cfg["cookie"] if auth else strip_identity(cfg["cookie"]),
+        "cookie": cookie_header(str(cfg.get("cookie") or ""), auth=auth),
         "dnt": "1",
         "origin": "https://space.bilibili.com",
         "priority": "u=1, i",

reaction_board/bilibili/auth_flow.py

@@ -40,6 +40,47 @@ import qrcodegen  # noqa: E402
 
 BASE = "https://api.bilibili.com"
 PASSPORT = "https://passport.bilibili.com"
+_QR_BLOCKS = {
+    (False, False): " ",
+    (True, False): "▀",
+    (False, True): "▄",
+    (True, True): "█",
+}
+_QR_ASCII_STYLE = "\033[48;5;231m\033[38;5;16m"
+_QR_ASCII_RESET = "\033[0m"
+
+
+def render_qr_ascii(text: str, *, border: int = 2) -> str:
+    """把登录链接编成终端半块字符二维码（两行模块合成一行）。"""
+    if border < 0:
+        raise ValueError("border 必须 >= 0")
+    qr = qrcodegen.QrCode.encode_text(text, qrcodegen.QrCode.Ecc.MEDIUM)
+    size = qr.get_size()
+    dim = size + border * 2
+
+    def dark(x: int, y: int) -> bool:
+        return qr.get_module(x - border, y - border)
+
+    lines: list[str] = []
+    for y in range(0, dim, 2):
+        row: list[str] = []
+        bottom_y = y + 1
+        for x in range(dim):
+            top = dark(x, y)
+            bottom = dark(x, bottom_y) if bottom_y < dim else False
+            row.append(_QR_BLOCKS[(top, bottom)])
+        lines.append("".join(row))
+    return "\n".join(lines)
+
+
+def format_qr_ascii(text: str, *, border: int = 2, color: bool | None = None) -> str:
+    """终端二维码；TTY 下加白底黑字，方便深色终端扫码。"""
+    body = render_qr_ascii(text, border=border)
+    if color is None:
+        color = sys.stdout.isatty()
+    if not color:
+        return body
+    return "\n".join(f"{_QR_ASCII_STYLE}{line}{_QR_ASCII_RESET}" for line in body.split("\n"))
 
 
 def write_qr_png(text: str, path: str | Path, scale: int = 8, border: int = 4) -> Path:
@@ -200,7 +241,7 @@ class AuthService:
     def run(self, *, timeout: int, no_browser: bool) -> int:
         raw = self._load_raw()
         credentials = raw["bilibili"][self.account]
-        print(f"[auth] 为 {self.account} 账号申请扫码登录 ...")
+        print(f"[auth] 为 {self.account} 账号申请扫码登录 ...", flush=True)
         generated, _ = self._request(
             credentials, f"{PASSPORT}/x/passport-login/web/qrcode/generate?source=main-fe-header", auth=False
         )
@@ -209,14 +250,18 @@ class AuthService:
         if generated.get("code") != 0 or not key or not login_url:
             print(f"[auth] 申请二维码失败: code={generated.get('code')} {generated.get('message')}")
             return 2
+        login_url = str(login_url)
         qr_path = Path(tempfile.gettempdir()) / f"bili-fav-{self.account}-{key[:8]}.png"
-        write_qr_png(str(login_url), qr_path)
-        print(f"[auth] 二维码已生成: {qr_path}")
+        write_qr_png(login_url, qr_path)
+        print(f"[auth] 二维码已生成: {qr_path}", flush=True)
+        print("[auth] 请使用哔哩哔哩 App 扫描下方二维码", flush=True)
+        print(format_qr_ascii(login_url), flush=True)
+        print(f"[auth] 登录链接: {login_url}", flush=True)
         if not no_browser:
             try:
                 open_path(qr_path)
             except Exception as exc:  # noqa: BLE001
-                print(f"[auth] 打开图片失败: {exc}，请手动打开二维码")
+                print(f"[auth] 打开图片失败: {exc}，请手动扫描终端二维码")
         deadline, last = time.time() + timeout, None
         while time.time() < deadline:
             try: