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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 f'{i}.{frag_boundary}@yt-dlp.github.io.invalid'
def _gen_stub(self, *, fragments, frag_boundary, title):
output = io.StringIO()
output.write(
'<!DOCTYPE html>'
'<html>'
'<head>'
f'<meta name="generator" content="yt-dlp {escapeHTML(YT_DLP_VERSION)}">'
f'<title>{escapeHTML(title)}</title>'
f'<style>{self._STYLESHEET}</style>'
'<body>')
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(f'<figcaption>Slide #{i + 1}</figcaption>')
output.write(f'<img src="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'
f'Subject: {self._escape_mime(title)}\r\n'
'Content-type: multipart/related; '
f'boundary="{frag_boundary}"; '
'type="text/html"\r\n'
f'X.yt-dlp.Origin: {origin}\r\n'
'\r\n'
f'--{frag_boundary}\r\n'
'Content-Type: text/html; charset=utf-8\r\n'
f'Content-Length: {len(stub)}\r\n'
'\r\n'
f'{stub}\r\n').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)
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