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[facebook] Improve extraction (closes #16554)

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Sergey M․ 2018-06-02 01:32:18 +07:00
parent 9d082e7cb8
commit 9b89daefa6
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1 changed files with 37 additions and 29 deletions
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66
youtube_dl/extractor/facebook.py
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@ -324,34 +324,18 @@ def extract_video_data(instances):
if server_js_data: if server_js_data:
video_data = extract_video_data(server_js_data.get('instances', [])) video_data = extract_video_data(server_js_data.get('instances', []))
def extract_from_jsmods_instances(js_data):
if js_data:
return extract_video_data(try_get(
js_data, lambda x: x['jsmods']['instances'], list) or [])
if not video_data: if not video_data:
server_js_data = self._parse_json( server_js_data = self._parse_json(
self._search_regex( self._search_regex(
r'bigPipe\.onPageletArrive\(({.+?})\)\s*;\s*}\s*\)\s*,\s*["\']onPageletArrive\s+(?:stream_pagelet|pagelet_group_mall|permalink_video_pagelet)', r'bigPipe\.onPageletArrive\(({.+?})\)\s*;\s*}\s*\)\s*,\s*["\']onPageletArrive\s+(?:stream_pagelet|pagelet_group_mall|permalink_video_pagelet)',
webpage, 'js data', default='{}'), webpage, 'js data', default='{}'),
video_id, transform_source=js_to_json, fatal=False) video_id, transform_source=js_to_json, fatal=False)
if server_js_data: video_data = extract_from_jsmods_instances(server_js_data)
video_data = extract_video_data(try_get(
server_js_data, lambda x: x['jsmods']['instances'],
list) or [])
if not video_data:
# video info not in first request, do a secondary request using tahoe player specific url
tahoe_data = self._download_webpage(
self._VIDEO_PAGE_TAHOE_TEMPLATE % video_id, video_id,
data=urlencode_postdata({
'__user': 0,
'__a': 1,
'__pc': self._search_regex(r'"pkg_cohort":"(.*?)"', webpage, 'pkg cohort', default='PHASED:DEFAULT'),
'__rev': self._search_regex(r'"client_revision":(\d+),', webpage, 'client revision', default=3944515),
}),
headers={
'Content-Type': 'application/x-www-form-urlencoded',
})
tahoe_js_data = self._parse_json(self._search_regex(
r'for \(;;\);(.+)', tahoe_data,
'tahoe js data', default='{}'), video_id, fatal=False)
video_data = extract_video_data(tahoe_js_data.get('jsmods', {}).get('instances', []))
if not video_data: if not video_data:
if not fatal_if_no_video: if not fatal_if_no_video:
@ -363,8 +347,33 @@ def extract_video_data(instances):
expected=True) expected=True)
elif '>You must log in to continue' in webpage: elif '>You must log in to continue' in webpage:
self.raise_login_required() self.raise_login_required()
else:
raise ExtractorError('Cannot parse data') # Video info not in first request, do a secondary request using
# tahoe player specific URL
tahoe_data = self._download_webpage(
self._VIDEO_PAGE_TAHOE_TEMPLATE % video_id, video_id,
data=urlencode_postdata({
'__user': 0,
'__a': 1,
'__pc': self._search_regex(
r'pkg_cohort["\']\s*:\s*["\'](.+?)["\']', webpage,
'pkg cohort', default='PHASED:DEFAULT'),
'__rev': self._search_regex(
r'client_revision["\']\s*:\s*(\d+),', webpage,
'client revision', default='3944515'),
}),
headers={
'Content-Type': 'application/x-www-form-urlencoded',
})
tahoe_js_data = self._parse_json(
self._search_regex(
r'for\s+\(\s*;\s*;\s*\)\s*;(.+)', tahoe_data,
'tahoe js data', default='{}'),
video_id, fatal=False)
video_data = extract_from_jsmods_instances(tahoe_js_data)
if not video_data:
raise ExtractorError('Cannot parse data')
formats = [] formats = []
for f in video_data: for f in video_data:
@ -408,11 +417,10 @@ def extract_video_data(instances):
video_title = limit_length(video_title, 80) video_title = limit_length(video_title, 80)
else: else:
video_title = 'Facebook video #%s' % video_id video_title = 'Facebook video #%s' % video_id
uploader = clean_html(get_element_by_id('fbPhotoPageAuthorName', webpage)) uploader = clean_html(get_element_by_id(
if not uploader: 'fbPhotoPageAuthorName', webpage)) or self._search_regex(
uploader = self._search_regex( r'ownerName\s*:\s*"([^"]+)"', webpage, 'uploader',
[r'ownerName\s*:\s*"([^"]+)"', r'property="og:title"\s*content="(.*?)"'], fatal=False) or self._og_search_title(webpage, fatal=False)
webpage, 'uploader', fatal=False)
timestamp = int_or_none(self._search_regex( timestamp = int_or_none(self._search_regex(
r'<abbr[^>]+data-utime=["\'](\d+)', webpage, r'<abbr[^>]+data-utime=["\'](\d+)', webpage,
'timestamp', default=None)) 'timestamp', default=None))