import io import quopri import re import uuid from .fragment import FragmentFD from ..compat import imghdr from ..utils import escapeHTML, formatSeconds, srt_subtitles_timecode, urljoin from ..version import __version__ as YT_DLP_VERSION class MhtmlFD(FragmentFD): _STYLESHEET = """\ html, body { margin: 0; padding: 0; height: 100vh; } html { overflow-y: scroll; scroll-snap-type: y mandatory; } body { scroll-snap-type: y mandatory; display: flex; flex-flow: column; } body > figure { max-width: 100vw; max-height: 100vh; scroll-snap-align: center; } body > figure > figcaption { text-align: center; height: 2.5em; } body > figure > img { display: block; margin: auto; max-width: 100%; max-height: calc(100vh - 5em); } """ _STYLESHEET = re.sub(r'\s+', ' ', _STYLESHEET) _STYLESHEET = re.sub(r'\B \B|(?<=[\w\-]) (?=[^\w\-])|(?<=[^\w\-]) (?=[\w\-])', '', _STYLESHEET) @staticmethod def _escape_mime(s): return '=?utf-8?Q?' + (b''.join( bytes((b,)) if b >= 0x20 else b'=%02X' % b for b in quopri.encodestring(s.encode(), header=True) )).decode('us-ascii') + '?=' def _gen_cid(self, i, fragment, frag_boundary): return '%u.%s@yt-dlp.github.io.invalid' % (i, frag_boundary) def _gen_stub(self, *, fragments, frag_boundary, title): output = io.StringIO() output.write(( '<!DOCTYPE html>' '<html>' '<head>' '' '<meta name="generator" content="yt-dlp {version}">' '' '<title>{title}</title>' '' '<style>{styles}</style>' '<body>' ).format( version=escapeHTML(YT_DLP_VERSION), styles=self._STYLESHEET, title=escapeHTML(title) )) t0 = 0 for i, frag in enumerate(fragments): output.write('<figure>') try: t1 = t0 + frag['duration'] output.write(( '<figcaption>Slide #{num}: {t0} – {t1} (duration: {duration})</figcaption>' ).format( num=i + 1, t0=srt_subtitles_timecode(t0), t1=srt_subtitles_timecode(t1), duration=formatSeconds(frag['duration'], msec=True) )) except (KeyError, ValueError, TypeError): t1 = None output.write(( '<figcaption>Slide #{num}</figcaption>' ).format(num=i + 1)) output.write('<img src="cid:{cid}">'.format( cid=self._gen_cid(i, frag, frag_boundary))) output.write('</figure>') t0 = t1 return output.getvalue() def real_download(self, filename, info_dict): fragment_base_url = info_dict.get('fragment_base_url') fragments = info_dict['fragments'][:1] if self.params.get( 'test', False) else info_dict['fragments'] title = info_dict.get('title', info_dict['format_id']) origin = info_dict.get('webpage_url', info_dict['url']) ctx = { 'filename': filename, 'total_frags': len(fragments), } self._prepare_and_start_frag_download(ctx, info_dict) extra_state = ctx.setdefault('extra_state', { 'header_written': False, 'mime_boundary': str(uuid.uuid4()).replace('-', ''), }) frag_boundary = extra_state['mime_boundary'] if not extra_state['header_written']: stub = self._gen_stub( fragments=fragments, frag_boundary=frag_boundary, title=title ) ctx['dest_stream'].write(( 'MIME-Version: 1.0\r\n' 'From: <nowhere@yt-dlp.github.io.invalid>\r\n' 'To: <nowhere@yt-dlp.github.io.invalid>\r\n' 'Subject: {title}\r\n' 'Content-type: multipart/related; ' '' 'boundary="{boundary}"; ' '' 'type="text/html"\r\n' 'X.yt-dlp.Origin: {origin}\r\n' '\r\n' '--{boundary}\r\n' 'Content-Type: text/html; charset=utf-8\r\n' 'Content-Length: {length}\r\n' '\r\n' '{stub}\r\n' ).format( origin=origin, boundary=frag_boundary, length=len(stub), title=self._escape_mime(title), stub=stub ).encode()) extra_state['header_written'] = True for i, fragment in enumerate(fragments): if (i + 1) <= ctx['fragment_index']: continue fragment_url = fragment.get('url') if not fragment_url: assert fragment_base_url fragment_url = urljoin(fragment_base_url, fragment['path']) success = self._download_fragment(ctx, fragment_url, info_dict) if not success: continue frag_content = self._read_fragment(ctx) frag_header = io.BytesIO() frag_header.write( b'--%b\r\n' % frag_boundary.encode('us-ascii')) frag_header.write( b'Content-ID: <%b>\r\n' % self._gen_cid(i, fragment, frag_boundary).encode('us-ascii')) frag_header.write( b'Content-type: %b\r\n' % f'image/{imghdr.what(h=frag_content) or "jpeg"}'.encode()) frag_header.write( b'Content-length: %u\r\n' % len(frag_content)) frag_header.write( b'Content-location: %b\r\n' % fragment_url.encode('us-ascii')) frag_header.write( b'X.yt-dlp.Duration: %f\r\n' % fragment['duration']) frag_header.write(b'\r\n') self._append_fragment( ctx, frag_header.getvalue() + frag_content + b'\r\n') ctx['dest_stream'].write( b'--%b--\r\n\r\n' % frag_boundary.encode('us-ascii')) return self._finish_frag_download(ctx, info_dict)