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cdb19aa4 | 1 | import io |
2 | import quopri | |
3 | import re | |
4 | import uuid | |
5 | ||
6 | from .fragment import FragmentFD | |
f8271158 | 7 | from ..utils import escapeHTML, formatSeconds, srt_subtitles_timecode, urljoin |
cdb19aa4 | 8 | from ..version import __version__ as YT_DLP_VERSION |
9 | ||
10 | ||
11 | class MhtmlFD(FragmentFD): | |
12 | FD_NAME = 'mhtml' | |
13 | ||
14 | _STYLESHEET = """\ | |
15 | html, body { | |
16 | margin: 0; | |
17 | padding: 0; | |
18 | height: 100vh; | |
19 | } | |
20 | ||
21 | html { | |
22 | overflow-y: scroll; | |
23 | scroll-snap-type: y mandatory; | |
24 | } | |
25 | ||
26 | body { | |
27 | scroll-snap-type: y mandatory; | |
28 | display: flex; | |
29 | flex-flow: column; | |
30 | } | |
31 | ||
32 | body > figure { | |
33 | max-width: 100vw; | |
34 | max-height: 100vh; | |
35 | scroll-snap-align: center; | |
36 | } | |
37 | ||
38 | body > figure > figcaption { | |
39 | text-align: center; | |
40 | height: 2.5em; | |
41 | } | |
42 | ||
43 | body > figure > img { | |
44 | display: block; | |
45 | margin: auto; | |
46 | max-width: 100%; | |
47 | max-height: calc(100vh - 5em); | |
48 | } | |
49 | """ | |
50 | _STYLESHEET = re.sub(r'\s+', ' ', _STYLESHEET) | |
51 | _STYLESHEET = re.sub(r'\B \B|(?<=[\w\-]) (?=[^\w\-])|(?<=[^\w\-]) (?=[\w\-])', '', _STYLESHEET) | |
52 | ||
53 | @staticmethod | |
54 | def _escape_mime(s): | |
55 | return '=?utf-8?Q?' + (b''.join( | |
56 | bytes((b,)) if b >= 0x20 else b'=%02X' % b | |
57 | for b in quopri.encodestring(s.encode('utf-8'), header=True) | |
58 | )).decode('us-ascii') + '?=' | |
59 | ||
60 | def _gen_cid(self, i, fragment, frag_boundary): | |
61 | return '%u.%s@yt-dlp.github.io.invalid' % (i, frag_boundary) | |
62 | ||
63 | def _gen_stub(self, *, fragments, frag_boundary, title): | |
64 | output = io.StringIO() | |
65 | ||
66 | output.write(( | |
67 | '<!DOCTYPE html>' | |
68 | '<html>' | |
69 | '<head>' | |
70 | '' '<meta name="generator" content="yt-dlp {version}">' | |
71 | '' '<title>{title}</title>' | |
72 | '' '<style>{styles}</style>' | |
73 | '<body>' | |
74 | ).format( | |
75 | version=escapeHTML(YT_DLP_VERSION), | |
76 | styles=self._STYLESHEET, | |
77 | title=escapeHTML(title) | |
78 | )) | |
79 | ||
80 | t0 = 0 | |
81 | for i, frag in enumerate(fragments): | |
82 | output.write('<figure>') | |
83 | try: | |
84 | t1 = t0 + frag['duration'] | |
85 | output.write(( | |
86 | '<figcaption>Slide #{num}: {t0} – {t1} (duration: {duration})</figcaption>' | |
87 | ).format( | |
88 | num=i + 1, | |
89 | t0=srt_subtitles_timecode(t0), | |
90 | t1=srt_subtitles_timecode(t1), | |
91 | duration=formatSeconds(frag['duration'], msec=True) | |
92 | )) | |
93 | except (KeyError, ValueError, TypeError): | |
94 | t1 = None | |
95 | output.write(( | |
96 | '<figcaption>Slide #{num}</figcaption>' | |
97 | ).format(num=i + 1)) | |
98 | output.write('<img src="cid:{cid}">'.format( | |
99 | cid=self._gen_cid(i, frag, frag_boundary))) | |
100 | output.write('</figure>') | |
101 | t0 = t1 | |
102 | ||
103 | return output.getvalue() | |
104 | ||
105 | def real_download(self, filename, info_dict): | |
106 | fragment_base_url = info_dict.get('fragment_base_url') | |
107 | fragments = info_dict['fragments'][:1] if self.params.get( | |
108 | 'test', False) else info_dict['fragments'] | |
d76991ab | 109 | title = info_dict.get('title', info_dict['format_id']) |
110 | origin = info_dict.get('webpage_url', info_dict['url']) | |
cdb19aa4 | 111 | |
112 | ctx = { | |
113 | 'filename': filename, | |
114 | 'total_frags': len(fragments), | |
115 | } | |
116 | ||
3ba7740d | 117 | self._prepare_and_start_frag_download(ctx, info_dict) |
cdb19aa4 | 118 | |
119 | extra_state = ctx.setdefault('extra_state', { | |
120 | 'header_written': False, | |
121 | 'mime_boundary': str(uuid.uuid4()).replace('-', ''), | |
122 | }) | |
123 | ||
124 | frag_boundary = extra_state['mime_boundary'] | |
125 | ||
126 | if not extra_state['header_written']: | |
127 | stub = self._gen_stub( | |
128 | fragments=fragments, | |
129 | frag_boundary=frag_boundary, | |
130 | title=title | |
131 | ) | |
132 | ||
133 | ctx['dest_stream'].write(( | |
134 | 'MIME-Version: 1.0\r\n' | |
135 | 'From: <nowhere@yt-dlp.github.io.invalid>\r\n' | |
136 | 'To: <nowhere@yt-dlp.github.io.invalid>\r\n' | |
137 | 'Subject: {title}\r\n' | |
138 | 'Content-type: multipart/related; ' | |
139 | '' 'boundary="{boundary}"; ' | |
140 | '' 'type="text/html"\r\n' | |
141 | 'X.yt-dlp.Origin: {origin}\r\n' | |
142 | '\r\n' | |
143 | '--{boundary}\r\n' | |
144 | 'Content-Type: text/html; charset=utf-8\r\n' | |
145 | 'Content-Length: {length}\r\n' | |
146 | '\r\n' | |
147 | '{stub}\r\n' | |
148 | ).format( | |
149 | origin=origin, | |
150 | boundary=frag_boundary, | |
151 | length=len(stub), | |
152 | title=self._escape_mime(title), | |
153 | stub=stub | |
154 | ).encode('utf-8')) | |
155 | extra_state['header_written'] = True | |
156 | ||
157 | for i, fragment in enumerate(fragments): | |
158 | if (i + 1) <= ctx['fragment_index']: | |
159 | continue | |
160 | ||
b3edc806 | 161 | fragment_url = fragment.get('url') |
162 | if not fragment_url: | |
163 | assert fragment_base_url | |
164 | fragment_url = urljoin(fragment_base_url, fragment['path']) | |
165 | ||
d71fd412 | 166 | success = self._download_fragment(ctx, fragment_url, info_dict) |
cdb19aa4 | 167 | if not success: |
168 | continue | |
d71fd412 | 169 | frag_content = self._read_fragment(ctx) |
cdb19aa4 | 170 | |
171 | mime_type = b'image/jpeg' | |
172 | if frag_content.startswith(b'\x89PNG\r\n\x1a\n'): | |
173 | mime_type = b'image/png' | |
174 | if frag_content.startswith((b'GIF87a', b'GIF89a')): | |
175 | mime_type = b'image/gif' | |
1d485a1a | 176 | if frag_content.startswith(b'RIFF') and frag_content[8:12] == b'WEBP': |
cdb19aa4 | 177 | mime_type = b'image/webp' |
178 | ||
179 | frag_header = io.BytesIO() | |
180 | frag_header.write( | |
181 | b'--%b\r\n' % frag_boundary.encode('us-ascii')) | |
182 | frag_header.write( | |
183 | b'Content-ID: <%b>\r\n' % self._gen_cid(i, fragment, frag_boundary).encode('us-ascii')) | |
184 | frag_header.write( | |
185 | b'Content-type: %b\r\n' % mime_type) | |
186 | frag_header.write( | |
187 | b'Content-length: %u\r\n' % len(frag_content)) | |
188 | frag_header.write( | |
189 | b'Content-location: %b\r\n' % fragment_url.encode('us-ascii')) | |
190 | frag_header.write( | |
191 | b'X.yt-dlp.Duration: %f\r\n' % fragment['duration']) | |
192 | frag_header.write(b'\r\n') | |
193 | self._append_fragment( | |
194 | ctx, frag_header.getvalue() + frag_content + b'\r\n') | |
195 | ||
196 | ctx['dest_stream'].write( | |
197 | b'--%b--\r\n\r\n' % frag_boundary.encode('us-ascii')) | |
3ba7740d | 198 | self._finish_frag_download(ctx, info_dict) |
cdb19aa4 | 199 | return True |