Initial commit: BiliDownloader Web 版：Python 零依赖后端 + shadcn/ui 前端

tools/diag.py

@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+"""诊断：nav 为何报未登录 + dash.video 实际内容。"""
+import json
+import sys
+import urllib.request
+
+sys.path.insert(0, r"E:\deepseek\BiliDownloaderWeb")
+import engine
+
+cfg = json.load(open(r"E:\deepseek\BiliDownloaderWeb\config.json", encoding="utf-8"))
+sess = cfg["sessdata"]
+print("config 里 sessdata 长度 =", len(sess))
+print("前 24 字符 =", sess[:24])
+print("后 24 字符 =", sess[-24:])
+
+print("\n--- 直接请求 nav，看原始返回 ---")
+req = urllib.request.Request(
+    engine.API_NAV,
+    headers={"User-Agent": engine.UA, "Referer": "https://www.bilibili.com",
+             "Cookie": "SESSDATA=" + sess})
+with urllib.request.urlopen(req, timeout=30) as r:
+    raw = json.loads(r.read().decode("utf-8"))
+print("code =", raw.get("code"), " message =", raw.get("message"))
+d = raw.get("data") or {}
+print("isLogin =", d.get("isLogin"), " uname =", d.get("uname"))
+print("有 wbi_img =", bool(d.get("wbi_img")))
+
+print("\n--- dash.video 实际内容（qn=127）---")
+vid = engine.video_detail("BV1HVBAYLEAo", "SESSDATA=" + sess)
+cid = vid["pages"][0]["cid"]
+p = engine.play_url("BV1HVBAYLEAo", cid, "SESSDATA=" + sess)
+print("maxQuality =", p["maxQuality"])
+for s in p["video"]:
+    print(f"  视频流 qn={s['quality']:>4} {s['width']}x{s['height']} codec={s['codecs']} {s['bandwidth']//1000}kbps")
+for s in p["audio"]:
+    print(f"  音频流 {s['codecs']} {s['bandwidth']//1000}kbps")
+print("qualities 的 width/height 字段示例:", p["qualities"][0])