1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
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@hypervideo.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="hypervideo {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@hypervideo.github.io.invalid>\r\n'
'To: <nowhere@hypervideo.github.io.invalid>\r\n'
'Subject: {title}\r\n'
'Content-type: multipart/related; '
'' 'boundary="{boundary}"; '
'' 'type="text/html"\r\n'
'X.hypervideo.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.hypervideo.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)
|
