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[howstuffworks] Parse only once, but right (#4383)

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Philipp Hagemeister 2014-12-12 04:23:34 +01:00
parent bf94e38d3d
commit 62651c556a
1 changed files with 28 additions and 25 deletions
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53
youtube_dl/extractor/howstuffworks.py
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@ -1,7 +1,12 @@
from __future__ import unicode_literals from __future__ import unicode_literals
from .common import InfoExtractor from .common import InfoExtractor
from ..utils import find_xpath_attr from ..utils import (
find_xpath_attr,
int_or_none,
js_to_json,
unescapeHTML,
)
class HowStuffWorksIE(InfoExtractor): class HowStuffWorksIE(InfoExtractor):
@ -14,7 +19,9 @@ class HowStuffWorksIE(InfoExtractor):
'ext': 'flv', 'ext': 'flv',
'title': 'Cool Jobs - Iditarod Musher', 'title': 'Cool Jobs - Iditarod Musher',
'description': 'Cold sleds, freezing temps and warm dog breath... an Iditarod musher\'s dream. Kasey-Dee Gardner jumps on a sled to find out what the big deal is.', 'description': 'Cold sleds, freezing temps and warm dog breath... an Iditarod musher\'s dream. Kasey-Dee Gardner jumps on a sled to find out what the big deal is.',
'thumbnail': 'http://s.hswstatic.com/gif/videos/480x360/5266.jpg', 'display_id': 'cool-jobs-iditarod-musher',
'thumbnail': 're:^https?://.*\.jpg$',
'duration': 161,
}, },
}, },
{ {
@ -24,7 +31,8 @@ class HowStuffWorksIE(InfoExtractor):
'ext': 'mp4', 'ext': 'mp4',
'title': 'Survival Zone: Food and Water In the Savanna', 'title': 'Survival Zone: Food and Water In the Savanna',
'description': 'Learn how to find both food and water while trekking in the African savannah. In this video from the Discovery Channel.', 'description': 'Learn how to find both food and water while trekking in the African savannah. In this video from the Discovery Channel.',
'thumbnail': 'http://s.hswstatic.com/gif/videos/480x360/7199.jpg', 'display_id': 'survival-zone-food-and-water-in-the-savanna',
'thumbnail': 're:^https?://.*\.jpg$',
}, },
}, },
{ {
@ -34,7 +42,8 @@ class HowStuffWorksIE(InfoExtractor):
'ext': 'flv', 'ext': 'flv',
'title': 'Sword Swallowing #1 by Dan Meyer', 'title': 'Sword Swallowing #1 by Dan Meyer',
'description': 'Video footage (1 of 3) used by permission of the owner Dan Meyer through Sword Swallowers Association International <www.swordswallow.org>', 'description': 'Video footage (1 of 3) used by permission of the owner Dan Meyer through Sword Swallowers Association International <www.swordswallow.org>',
'thumbnail': 'http://s.hswstatic.com/gif/videos/480x360/118306353233.jpg', 'display_id': 'sword-swallowing-1-by-dan-meyer',
'thumbnail': 're:^https?://.*\.jpg$',
}, },
}, },
] ]
@ -42,23 +51,17 @@ class HowStuffWorksIE(InfoExtractor):
def _real_extract(self, url): def _real_extract(self, url):
display_id = self._match_id(url) display_id = self._match_id(url)
webpage = self._download_webpage(url, display_id) webpage = self._download_webpage(url, display_id)
clip_info = self._search_regex('(?s)var clip = {(.*?)};', webpage, 'clip info') clip_js = self._search_regex(
r'(?s)var clip = ({.*?});', webpage, 'clip info')
clip_info = self._parse_json(
clip_js, display_id, transform_source=js_to_json)
def extract_clip_info(key, clip_info, name=None, **kargs): video_id = clip_info['content_id']
if name is None:
name = key
return self._html_search_regex(
r"\s*%s\s*: '?([^'\n]*[^'\n,])" % key, clip_info, name, **kargs)
video_id = extract_clip_info('content_id', clip_info, 'video id')
formats = [] formats = []
m3u8_url = extract_clip_info('m3u8', clip_info, 'm3u8 url', default=None) m3u8_url = clip_info.get('m3u8')
if m3u8_url is not None: if m3u8_url:
formats += self._extract_m3u8_formats(m3u8_url , video_id, 'mp4') formats += self._extract_m3u8_formats(m3u8_url, video_id, 'mp4')
mp4 = self._parse_json( for video in clip_info.get('mp4', []):
extract_clip_info(
'mp4', clip_info, 'formats').replace('},]','}]'), video_id)
for video in mp4:
formats.append({ formats.append({
'url': video['src'], 'url': video['src'],
'format_id': video['bitrate'], 'format_id': video['bitrate'],
@ -80,7 +83,7 @@ def extract_clip_info(key, clip_info, name=None, **kargs):
for video in smil.findall( for video in smil.findall(
'./{0}body/{0}switch/{0}video'.format('{http://www.w3.org/2001/SMIL20/Language}')): './{0}body/{0}switch/{0}video'.format('{http://www.w3.org/2001/SMIL20/Language}')):
vbr = int(video.attrib['system-bitrate']) / 1000 vbr = int_or_none(video.attrib['system-bitrate'], scale=1000)
formats.append({ formats.append({
'url': '%s/%s%s' % (http_base, video.attrib['src'], URL_SUFFIX), 'url': '%s/%s%s' % (http_base, video.attrib['src'], URL_SUFFIX),
'format_id': '%dk' % vbr, 'format_id': '%dk' % vbr,
@ -90,11 +93,11 @@ def extract_clip_info(key, clip_info, name=None, **kargs):
self._sort_formats(formats) self._sort_formats(formats)
return { return {
'id': video_id, 'id': '%s' % video_id,
'display_id': display_id, 'display_id': display_id,
'title': extract_clip_info('clip_title', clip_info, 'title'), 'title': unescapeHTML(clip_info['clip_title']),
'description': extract_clip_info('caption', clip_info, 'description', fatal=False), 'description': unescapeHTML(clip_info.get('caption')),
'thumbnail': extract_clip_info('video_still_url', clip_info, 'thumbnail'), 'thumbnail': clip_info.get('video_still_url'),
'duration': extract_clip_info('duration', clip_info), 'duration': clip_info.get('duration'),
'formats': formats, 'formats': formats,
} }