mirror of
https://github.com/saveweb/biliarchiver.git
synced 2024-09-19 19:15:27 -07:00
244 lines
12 KiB
Python
244 lines
12 KiB
Python
import asyncio
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import os
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from pathlib import Path
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import re
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import aiofiles
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import httpx
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from bilix.download.utils import raise_api_error, req_retry
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from bilix.exception import APIError
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from bilix.sites.bilibili import api
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from rich import print
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import json
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from bilix.sites.bilibili.downloader import DownloaderBilibili
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from bilix.exception import APIResourceError
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from biliarchiver.config import BILIBILI_IDENTIFIER_PERFIX
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from biliarchiver.config import config
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from biliarchiver.utils.identifier import human_readable_upper_part_map
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@raise_api_error
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async def new_get_subtitle_info(client: httpx.AsyncClient, bvid, cid):
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params = {'bvid': bvid, 'cid': cid}
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res = await req_retry(client, 'https://api.bilibili.com/x/player/v2', params=params)
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info = json.loads(res.text)
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if info['code'] == -400:
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raise APIError(f'未找到字幕信息', params)
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# 这里 monkey patch 一下把返回 lan_doc 改成返回 lan，这样生成的字幕文件名就是 语言代码 而不是 中文名 了
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# 例如
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# lan_doc: 中文（中国）
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# lang: zh-CN
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# return [[f'http:{i["subtitle_url"]}', i['lan_doc']] for i in info['data']['subtitle']['subtitles']]
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return [[f'http:{i["subtitle_url"]}', i['lan']] for i in info['data']['subtitle']['subtitles']]
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api.get_subtitle_info = new_get_subtitle_info
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@raise_api_error
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async def new_get_video_info(client: httpx.AsyncClient, url: str):
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"""
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monkey patch 一下，只使用 API 获取 video_info
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理由：
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- API 目前只支持一般的 AV/BV 视频，可以预防我们不小心下到了番剧/影视剧之类的版权内容
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- 如果缺 url 对应的分P，bilix 那边会报 AssertionError(f"没有找到分P: p{selected_page_num}，请检查输入")
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- 对于一些老视频， _get_video_info_from_html() 经常返回烦人且不稳定的 durl 资源。而 API 会更多请求到 dash 资源（虽然仍有少数视频只有 durl 资源）。
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"""
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# print("using api")
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return await api._get_video_info_from_api(client, url)
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api.get_video_info = new_get_video_info
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async def _new_attach_dash_and_durl_from_api(client: httpx.AsyncClient, video_info: api.VideoInfo):
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params = {'cid': video_info.cid, 'bvid': video_info.bvid,
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'qn': 120, # 如无 dash 资源（少数老视频），fallback 到 4K 超清 durl
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'fnval': 4048, # 如 dash 资源可用，请求 dash 格式的全部可用流
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'fourk': 1, # 请求 4k 资源
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'fnver': 0, 'platform': 'pc', 'otype': 'json'}
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dash_response = await req_retry(client, 'https://api.bilibili.com/x/player/playurl',
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params=params, follow_redirects=True)
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dash_json = json.loads(dash_response.text)
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if dash_json['code'] != 0:
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raise APIResourceError(dash_json['message'], video_info.bvid)
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dash, other = None, []
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if 'dash' in dash_json['data']:
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dash = api.Dash.from_dict(dash_json)
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if 'durl' in dash_json['data']:
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for i in dash_json['data']['durl']:
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suffix = re.search(r'\.([a-zA-Z0-9]+)\?', i['url']).group(1) # type: ignore
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other.append(api.Media(base_url=i['url'], backup_url=i['backup_url'], size=i['size'], suffix=suffix))
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video_info.dash, video_info.other = dash, other
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# NOTE: 临时修复，等 bilix 发布了 https://github.com/HFrost0/bilix/pull/174 的版本后，删掉这个 patch
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api._attach_dash_and_durl_from_api = _new_attach_dash_and_durl_from_api
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async def archive_bvid(d: DownloaderBilibili, bvid: str, *, logined: bool=False, semaphore: asyncio.Semaphore):
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async with semaphore:
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assert d.hierarchy is True, 'hierarchy 必须为 True' # 为保持后续目录结构、文件命名的一致性
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assert d.client.cookies.get('SESSDATA') is not None, 'sess_data 不能为空' # 开个大会员呗，能下 4k 呢。
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assert logined is True, '请先检查 SESSDATA 是否过期，再将 logined 设置为 True' # 防误操作
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upper_part = human_readable_upper_part_map(string=bvid, backward=True)
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OLD_videos_basepath: Path = config.storage_home_dir / 'videos' / bvid
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videos_basepath: Path = config.storage_home_dir / 'videos' / f'{bvid}-{upper_part}'
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if os.path.exists(OLD_videos_basepath):
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print(f'检测到旧的视频目录 {OLD_videos_basepath}，将其重命名为 {videos_basepath}...')
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os.rename(OLD_videos_basepath, videos_basepath)
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if os.path.exists(videos_basepath / '_all_downloaded.mark'):
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print(f'{bvid} 所有分p都已下载过了')
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return
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url = f'https://www.bilibili.com/video/{bvid}/'
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# 为了获取 pages，先请求一次
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first_video_info = await api.get_video_info(d.client, url)
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os.makedirs(videos_basepath, exist_ok=True)
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pid = 0
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for page in first_video_info.pages:
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pid += 1 # pid 从 1 开始
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if not page.p_url.endswith(f'?p={pid}'):
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raise NotImplementedError(f'{bvid} 的 P{pid} 不存在 (可能视频被 UP主/B站 删了)，请报告此问题，我们需要这个样本！')
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file_basename = f'{bvid}_p{pid}'
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video_basepath = videos_basepath / f'{BILIBILI_IDENTIFIER_PERFIX}-{file_basename}'
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video_extrapath = video_basepath / 'extra'
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if os.path.exists(f'{video_basepath}/_downloaded.mark'):
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print(f'{file_basename}: 已经下载过了')
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continue
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def delete_cache(reason: str = ''):
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if not os.path.exists(video_basepath):
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return
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_files_in_video_basepath = os.listdir(video_basepath)
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for _file in _files_in_video_basepath:
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if _file.startswith(file_basename):
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print(f'{file_basename}: {reason}，删除缓存: {_file}')
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os.remove(video_basepath / _file)
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delete_cache('为防出错，清空上次未完成的下载缓存')
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video_info = await api.get_video_info(d.client, page.p_url)
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print(f'{file_basename}: {video_info.title}...')
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os.makedirs(video_basepath, exist_ok=True)
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os.makedirs(video_extrapath, exist_ok=True)
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old_p_name = video_info.pages[video_info.p].p_name
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old_h1_title = video_info.h1_title
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# 在 d.hierarchy is True 且 h1_title 超长的情况下， bilix 会将 p_name 作为文件名
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video_info.pages[video_info.p].p_name = file_basename # 所以这里覆盖 p_name 为 file_basename
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video_info.h1_title = 'iiiiii' * 50 # 然后假装超长标题
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# 这样 bilix 保存的文件名就是我们想要的了（谁叫 bilix 不支持自定义文件名呢）
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# NOTE: p_name 似乎也不宜过长，否则还是会被 bilix 截断。
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# 但是我们以 {bvid}_p{pid} 作为文件名，这个长度是没问题的。
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codec = None
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quality = None
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if video_info.dash:
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# 选择编码 dvh->hev->avc
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# 不选 av0 ，毕竟目前没几个设备能拖得动
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codec_candidates = ['dvh', 'hev', 'avc']
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for codec_candidate in codec_candidates:
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for media in video_info.dash.videos:
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if media.codec.startswith(codec_candidate):
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codec = media.codec
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quality = media.quality
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print(f'{file_basename}: "{codec}" "{media.quality}" ...')
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break
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if codec is not None:
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break
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assert codec is not None and quality is not None, f'{file_basename}: 没有 dvh、avc 或 hevc 编码的视频'
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elif video_info.other:
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print(f'{file_basename}: 未解析到 dash 资源，交给 bilix 处理 ...')
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codec = ''
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quality = 0
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else:
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raise APIError(f'{file_basename}: 未解析到视频资源', page.p_url)
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assert codec is not None
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assert isinstance(quality, (int, str))
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cor1 = d.get_video(page.p_url ,video_info=video_info, path=video_basepath,
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quality=quality, # 选择最高画质
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codec=codec, # 编码
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# 下载 ass 弹幕(bilix 会自动调用 danmukuC 将 pb 弹幕转为 ass)、封面、字幕
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# 弹幕、封面、字幕都会被放进 extra 子目录里，所以需要 d.hierarchy is True
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dm=True, image=True, subtitle=True
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)
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# 下载原始的 pb 弹幕
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cor2 = d.get_dm(page.p_url, video_info=video_info, path=video_extrapath)
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# 下载视频超详细信息（BV 级别，不是分 P 级别）
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cor3 = download_bilibili_video_detail(d.client, bvid, f'{video_extrapath}/{file_basename}.info.json')
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coroutines = [cor1, cor2, cor3]
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tasks = [asyncio.create_task(cor) for cor in coroutines]
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results = await asyncio.gather(*tasks, return_exceptions=True)
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for result, cor in zip(results, coroutines):
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if isinstance(result, Exception):
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print("出错，其他任务完成后将抛出异常...")
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for task in tasks:
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task.cancel()
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raise result
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if codec.startswith('hev') and not os.path.exists(video_basepath / f'{file_basename}.mp4'):
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# 如果有下载缓存文件（以 file_basename 开头的文件），说明这个 hevc 的 dash 资源存在，只是可能因为网络之类的原因下载中途失败了
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delete_cache('下载出错')
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# 下载缓存文件都不存在，应该是对应的 dash 资源根本就没有，一些老视频会出现这种情况。
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# 换 avc 编码
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print(f'{file_basename}: 视频文件没有被下载？也许是 hevc 对应的 dash 资源不存在，尝试 avc ……')
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assert video_info.dash is not None
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for media in video_info.dash.videos:
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if media.codec.startswith('avc'):
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codec = media.codec
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print(f'{file_basename}: "{codec}" "{media.quality}" ...')
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break
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cor4 = d.get_video(page.p_url ,video_info=video_info, path=video_basepath,
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quality=0, # 选择最高画质
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codec=codec, # 编码
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# 下载 ass 弹幕(bilix 会自动调用 danmukuC 将 pb 弹幕转为 ass)、封面、字幕
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# 弹幕、封面、字幕都会被放进 extra 子目录里，所以需要 d.hierarchy is True
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dm=True, image=True, subtitle=True
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)
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await asyncio.gather(cor4)
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assert os.path.exists(video_basepath / f'{file_basename}.mp4') or os.path.exists(video_basepath / f'{file_basename}.flv')
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# 还原为了自定义文件名而做的覆盖
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video_info.pages[video_info.p].p_name = old_p_name
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video_info.h1_title = old_h1_title
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# 单 p 下好了
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async with aiofiles.open(f'{video_basepath}/_downloaded.mark', 'w', encoding='utf-8') as f:
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await f.write('')
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# bv 对应的全部 p 下好了
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async with aiofiles.open(f'{videos_basepath}/_all_downloaded.mark', 'w', encoding='utf-8') as f:
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await f.write('')
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async def download_bilibili_video_detail(client, bvid, filename):
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if os.path.exists(filename):
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print(f'{bvid} 视频详情已存在')
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return
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# url = 'https://api.bilibili.com/x/web-interface/view'
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url = 'https://api.bilibili.com/x/web-interface/view/detail' # 超详细 API（BV 级别，不是分 P 级别）
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params = {'bvid': bvid}
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r = await req_retry(client, url, params=params ,follow_redirects=True)
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r.raise_for_status()
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r_json = r.json()
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assert r_json['code'] == 0, f'{bvid} 视频详情获取失败'
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async with aiofiles.open(filename, 'w', encoding='utf-8') as f:
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# f.write(json.dumps(r.json(), indent=4, ensure_ascii=False))
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await f.write(r.text)
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print(f'{bvid} 视频详情已保存')
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