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from __future__ import unicode_literals
import re
import json
import random
import string
from .common import InfoExtractor
from ..utils import find_xpath_attr
class HowStuffWorksIE(InfoExtractor):
_VALID_URL = r'https?://[\da-z-]+\.howstuffworks\.com/(?:[^/]+/)*\d+-(?P<id>.+?)-video\.htm'
_TESTS = [
{
'url': 'http://adventure.howstuffworks.com/5266-cool-jobs-iditarod-musher-video.htm',
'info_dict': {
'id': '450221',
'display_id': 'cool-jobs-iditarod-musher',
'ext': 'flv',
'title': 'Cool Jobs - Iditarod Musher',
'description': 'md5:82bb58438a88027b8186a1fccb365f90',
'thumbnail': 're:^https?://.*\.jpg$',
},
'params': {
# md5 is not consistent
'skip_download': True
}
},
{
'url': 'http://adventure.howstuffworks.com/7199-survival-zone-food-and-water-in-the-savanna-video.htm',
'info_dict': {
'id': '453464',
'display_id': 'survival-zone-food-and-water-in-the-savanna',
'ext': 'mp4',
'title': 'Survival Zone: Food and Water In the Savanna',
'description': 'md5:7e1c89f6411434970c15fa094170c371',
'thumbnail': 're:^https?://.*\.jpg$',
},
'params': {
# md5 is not consistent
'skip_download': True
}
},
{
'url': 'http://entertainment.howstuffworks.com/arts/2706-sword-swallowing-1-by-dan-meyer-video.htm',
'info_dict': {
'id': '440011',
'display_id': 'sword-swallowing-1-by-dan-meyer',
'ext': 'flv',
'title': 'Sword Swallowing #1 by Dan Meyer',
'description': 'md5:b2409e88172913e2e7d3d1159b0ef735',
'thumbnail': 're:^https?://.*\.jpg$',
},
'params': {
# md5 is not consistent
'skip_download': True
}
},
]
def _real_extract(self, url):
mobj = re.match(self._VALID_URL, url)
display_id = mobj.group('id')
webpage = self._download_webpage(url, display_id)
content_id = self._search_regex(r'var siteSectionId="(\d+)";', webpage, 'content id')
mp4 = self._search_regex(
r'''(?xs)var\s+clip\s*=\s*{\s*
.+?\s*
content_id\s*:\s*%s\s*,\s*
.+?\s*
mp4\s*:\s*\[(.*?),?\]\s*
};\s*
videoData\.push\(clip\);''' % content_id,
webpage, 'mp4', fatal=False, default=None)
smil = self._download_xml(
'http://services.media.howstuffworks.com/videos/%s/smil-service.smil' % content_id,
content_id, 'Downloading video SMIL')
http_base = find_xpath_attr(
smil,
'./{0}head/{0}meta'.format('{http://www.w3.org/2001/SMIL20/Language}'),
'name',
'httpBase').get('content')
def random_string(str_len=0):
return ''.join([random.choice(string.ascii_uppercase) for _ in range(str_len)])
URL_SUFFIX = '?v=2.11.3&fp=LNX 11,2,202,356&r=%s&g=%s' % (random_string(5), random_string(12))
formats = []
if mp4:
for video in json.loads('[%s]' % mp4):
bitrate = video['bitrate']
fmt = {
'url': video['src'].replace('http://pmd.video.howstuffworks.com', http_base) + URL_SUFFIX,
'format_id': bitrate,
}
m = re.search(r'(?P<vbr>\d+)[Kk]', bitrate)
if m:
fmt['vbr'] = int(m.group('vbr'))
formats.append(fmt)
else:
for video in smil.findall(
'.//{0}body/{0}switch/{0}video'.format('{http://www.w3.org/2001/SMIL20/Language}')):
vbr = int(video.attrib['system-bitrate']) / 1000
formats.append({
'url': '%s/%s%s' % (http_base, video.attrib['src'], URL_SUFFIX),
'format_id': '%dk' % vbr,
'vbr': vbr,
})
self._sort_formats(formats)
title = self._og_search_title(webpage)
TITLE_SUFFIX = ' : HowStuffWorks'
if title.endswith(TITLE_SUFFIX):
title = title[:-len(TITLE_SUFFIX)]
description = self._og_search_description(webpage)
thumbnail = self._og_search_thumbnail(webpage)
return {
'id': content_id,
'display_id': display_id,
'title': title,
'description': description,
'thumbnail': thumbnail,
'formats': formats,
}
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