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https://github.com/JefferyHcool/BiliNote.git
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B 站 wbi/playurl 网关新增 dm_img_list/dm_img_str/dm_cover_img_str/ dm_img_inter + web_location 风控校验,缺失即返回 HTTP 412。对于网页不内嵌 playinfo、必须走 API 的视频(如 BV1X9L16oEgB),yt-dlp(含最新版)尚未适配, 导致下载失败,且刷新 cookie 无效。 通过猴补丁在 BilibiliBaseIE._download_playinfo 的 wbi 签名前注入哑值 dm_img 参数(取值形态对齐 yt-dlp 自身在 arc/search 端点的用法),即可恢复 200。 已验证补丁对固定版 2025.03.31 与最新 2026.06.09 签名一致、向前兼容;新增 4 个单元测试。 Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
72 lines
3.0 KiB
Python
72 lines
3.0 KiB
Python
"""
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Patch yt-dlp's Bilibili extractor to inject the dm_img_* / web_location
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risk-control parameters required by Bilibili's wbi/playurl gateway.
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Background
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----------
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Around 2026-06 Bilibili's ``x/player/wbi/playurl`` gateway began rejecting
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requests that omit the browser fingerprint params
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``dm_img_list`` / ``dm_img_str`` / ``dm_cover_img_str`` / ``dm_img_inter`` +
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``web_location`` with **HTTP 412**. Current yt-dlp (incl. the latest release)
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does not send these for the playurl endpoint, so any video whose web page does
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*not* inline ``playinfo`` — forcing yt-dlp onto the API path — fails with 412.
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Refreshing cookies does not help; the params themselves are missing.
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We inject dummy-but-well-formed values *before* wbi signing. The value shapes
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deliberately mirror yt-dlp's own usage of the same fields for the
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``x/space/wbi/arc/search`` endpoint (``BiliBiliSpaceIE``), which is the only
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place upstream currently sends them.
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"""
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import base64
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import logging
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import random
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import string
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logger = logging.getLogger(__name__)
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def build_dm_img_params() -> dict:
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"""Return dummy ``dm_img_*`` / ``web_location`` params the gateway expects."""
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return {
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'web_location': 1550101,
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'dm_img_list': '[]',
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'dm_img_str': base64.b64encode(
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''.join(random.choices(string.printable, k=random.randint(16, 64))).encode()
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)[:-2].decode(),
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'dm_cover_img_str': base64.b64encode(
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''.join(random.choices(string.printable, k=random.randint(32, 128))).encode()
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)[:-2].decode(),
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'dm_img_inter': '{"ds":[],"wh":[6093,6631,31],"of":[430,760,380]}',
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}
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def apply_bilibili_dm_img_patch() -> bool:
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"""
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Monkey-patch ``BilibiliBaseIE._download_playinfo`` to inject dm_img params.
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Idempotent and defensive: returns ``True`` if the patch is in place (whether
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applied now or previously), ``False`` if yt-dlp's internals could not be
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patched (logged, never raised — the caller stays functional).
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"""
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try:
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from yt_dlp.extractor.bilibili import BilibiliBaseIE
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except Exception as e: # yt-dlp missing or module layout changed upstream
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logger.warning("Bilibili dm_img patch skipped, cannot import extractor: %s", e)
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return False
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original = BilibiliBaseIE._download_playinfo
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if getattr(original, '_bili_dm_patched', False):
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return True
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def _patched_download_playinfo(self, bvid, cid, headers=None, query=None):
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# dm_* are merged into the query that the original method signs via
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# _sign_wbi; caller-supplied query params (e.g. try_look/qn) take
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# precedence over the injected dummies.
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merged_query = {**build_dm_img_params(), **(query or {})}
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return original(self, bvid, cid, headers=headers, query=merged_query)
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_patched_download_playinfo._bili_dm_patched = True
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BilibiliBaseIE._download_playinfo = _patched_download_playinfo
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logger.info("Applied Bilibili wbi/playurl dm_img patch to yt-dlp BilibiliBaseIE")
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return True
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