From 4e826cd9aec383768a7b25aa3161efd4672f9310 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Sergey=20M=E2=80=A4?= <dstftw@gmail.com>
Date: Sat, 15 Jul 2017 06:48:12 +0700
Subject: [PATCH] [nexx] Add extractor (closes #10807, closes #13465)

---
 youtube_dl/extractor/extractors.py |   1 +
 youtube_dl/extractor/generic.py    |  22 +++
 youtube_dl/extractor/nexx.py       | 221 +++++++++++++++++++++++++++++
 3 files changed, 244 insertions(+)
 create mode 100644 youtube_dl/extractor/nexx.py

diff --git a/youtube_dl/extractor/extractors.py b/youtube_dl/extractor/extractors.py
index eb1541729..9d34447a9 100644
--- a/youtube_dl/extractor/extractors.py
+++ b/youtube_dl/extractor/extractors.py
@@ -653,6 +653,7 @@ from .nextmedia import (
     AppleDailyIE,
     NextTVIE,
 )
+from .nexx import NexxIE
 from .nfb import NFBIE
 from .nfl import NFLIE
 from .nhk import NhkVodIE
diff --git a/youtube_dl/extractor/generic.py b/youtube_dl/extractor/generic.py
index 8c2ff39d5..123a21296 100644
--- a/youtube_dl/extractor/generic.py
+++ b/youtube_dl/extractor/generic.py
@@ -36,6 +36,7 @@ from .brightcove import (
     BrightcoveLegacyIE,
     BrightcoveNewIE,
 )
+from .nexx import NexxIE
 from .nbc import NBCSportsVPlayerIE
 from .ooyala import OoyalaIE
 from .rutv import RUTVIE
@@ -1549,6 +1550,22 @@ class GenericIE(InfoExtractor):
             },
             'add_ie': ['BrightcoveLegacy'],
         },
+        # Nexx embed
+        {
+            'url': 'https://www.funk.net/serien/5940e15073f6120001657956/items/593efbb173f6120001657503',
+            'info_dict': {
+                'id': '247746',
+                'ext': 'mp4',
+                'title': "Yesterday's Jam (OV)",
+                'description': 'md5:09bc0984723fed34e2581624a84e05f0',
+                'timestamp': 1492594816,
+                'upload_date': '20170419',
+            },
+            'params': {
+                'format': 'bestvideo',
+                'skip_download': True,
+            },
+        },
         # Facebook <iframe> embed
         {
             'url': 'https://www.hostblogger.de/blog/archives/6181-Auto-jagt-Betonmischer.html',
@@ -2133,6 +2150,11 @@ class GenericIE(InfoExtractor):
         if bc_urls:
             return self.playlist_from_matches(bc_urls, video_id, video_title, ie='BrightcoveNew')
 
+        # Look for Nexx embeds
+        nexx_urls = NexxIE._extract_urls(webpage)
+        if nexx_urls:
+            return self.playlist_from_matches(nexx_urls, video_id, video_title, ie=NexxIE.ie_key())
+
         # Look for ThePlatform embeds
         tp_urls = ThePlatformIE._extract_urls(webpage)
         if tp_urls:
diff --git a/youtube_dl/extractor/nexx.py b/youtube_dl/extractor/nexx.py
new file mode 100644
index 000000000..60b42cb7d
--- /dev/null
+++ b/youtube_dl/extractor/nexx.py
@@ -0,0 +1,221 @@
+# coding: utf-8
+from __future__ import unicode_literals
+
+import hashlib
+import random
+import re
+import time
+
+from .common import InfoExtractor
+from ..compat import compat_str
+from ..utils import (
+    ExtractorError,
+    int_or_none,
+    parse_duration,
+    try_get,
+    urlencode_postdata,
+)
+
+
+class NexxIE(InfoExtractor):
+    _VALID_URL = r'https?://api\.nexx(?:\.cloud|cdn\.com)/v3/(?P<domain_id>\d+)/videos/byid/(?P<id>\d+)'
+    _TESTS = [{
+        # movie
+        'url': 'https://api.nexx.cloud/v3/748/videos/byid/128907',
+        'md5': '16746bfc28c42049492385c989b26c4a',
+        'info_dict': {
+            'id': '128907',
+            'ext': 'mp4',
+            'title': 'Stiftung Warentest',
+            'alt_title': 'Wie ein Test abläuft',
+            'description': 'md5:d1ddb1ef63de721132abd38639cc2fd2',
+            'release_year': 2013,
+            'creator': 'SPIEGEL TV',
+            'thumbnail': r're:^https?://.*\.jpg$',
+            'duration': 2509,
+            'timestamp': 1384264416,
+            'upload_date': '20131112',
+        },
+        'params': {
+            'format': 'bestvideo',
+        },
+    }, {
+        # episode
+        'url': 'https://api.nexx.cloud/v3/741/videos/byid/247858',
+        'info_dict': {
+            'id': '247858',
+            'ext': 'mp4',
+            'title': 'Return of the Golden Child (OV)',
+            'description': 'md5:5d969537509a92b733de21bae249dc63',
+            'release_year': 2017,
+            'thumbnail': r're:^https?://.*\.jpg$',
+            'duration': 1397,
+            'timestamp': 1495033267,
+            'upload_date': '20170517',
+            'episode_number': 2,
+            'season_number': 2,
+        },
+        'params': {
+            'format': 'bestvideo',
+            'skip_download': True,
+        },
+    }, {
+        'url': 'https://api.nexxcdn.com/v3/748/videos/byid/128907',
+        'only_matching': True,
+    }]
+
+    @staticmethod
+    def _extract_urls(webpage):
+        # Reference:
+        # 1. https://nx-s.akamaized.net/files/201510/44.pdf
+
+        entries = []
+
+        # JavaScript Integration
+        for domain_id, video_id in re.findall(
+                r'''(?isx)
+                    <script\b[^>]+\bsrc=["\']https?://require\.nexx(?:\.cloud|cdn\.com)/(\d+).+?
+                    onPLAYReady.+?
+                    _play\.init\s*\(.+?\s*,\s*(\d+)\s*,\s*.+?\)
+                ''', webpage):
+            entries.append('https://api.nexx.cloud/v3/%s/videos/byid/%s' % (domain_id, video_id))
+
+        # TODO: support more embed formats
+
+        return entries
+
+    def _handle_error(self, response):
+        status = int_or_none(try_get(
+            response, lambda x: x['metadata']['status']) or 200)
+        if 200 <= status < 300:
+            return
+        raise ExtractorError(
+            '%s said: %s' % (self.IE_NAME, response['metadata']['errorhint']),
+            expected=True)
+
+    def _call_api(self, domain_id, path, video_id, data=None, headers={}):
+        headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8'
+        result = self._download_json(
+            'https://api.nexx.cloud/v3/%s/%s' % (domain_id, path), video_id,
+            'Downloading %s JSON' % path, data=urlencode_postdata(data),
+            headers=headers)
+        self._handle_error(result)
+        return result['result']
+
+    def _real_extract(self, url):
+        mobj = re.match(self._VALID_URL, url)
+        domain_id, video_id = mobj.group('domain_id', 'id')
+
+        # Reverse engineered from JS code (see getDeviceID function)
+        device_id = '%d:%d:%d%d' % (
+            random.randint(1, 4), int(time.time()),
+            random.randint(1e4, 99999), random.randint(1, 9))
+
+        result = self._call_api(domain_id, 'session/init', video_id, data={
+            'nxp_devh': device_id,
+            'nxp_userh': '',
+            'precid': '0',
+            'playlicense': '0',
+            'screenx': '1920',
+            'screeny': '1080',
+            'playerversion': '6.0.00',
+            'gateway': 'html5',
+            'adGateway': '',
+            'explicitlanguage': 'en-US',
+            'addTextTemplates': '1',
+            'addDomainData': '1',
+            'addAdModel': '1',
+        }, headers={
+            'X-Request-Enable-Auth-Fallback': '1',
+        })
+
+        cid = result['general']['cid']
+
+        # As described in [1] X-Request-Token generation algorithm is
+        # as follows:
+        #   md5( operation + domain_id + domain_secret )
+        # where domain_secret is a static value that will be given by nexx.tv
+        # as per [1]. Here is how this "secret" is generated (reversed
+        # from _play.api.init function, search for clienttoken). So it's
+        # actually not static and not that much of a secret.
+        # 1. https://nexxtvstorage.blob.core.windows.net/files/201610/27.pdf
+        secret = result['device']['clienttoken'][int(device_id[0]):]
+        secret = secret[0:len(secret) - int(device_id[-1])]
+
+        op = 'byid'
+
+        # Reversed from JS code for _play.api.call function (search for
+        # X-Request-Token)
+        request_token = hashlib.md5(
+            ''.join((op, domain_id, secret)).encode('utf-8')).hexdigest()
+
+        video = self._call_api(
+            domain_id, 'videos/%s/%s' % (op, video_id), video_id, data={
+                'additionalfields': 'language,channel,actors,studio,licenseby,slug,subtitle,teaser,description',
+                'addInteractionOptions': '1',
+                'addStatusDetails': '1',
+                'addStreamDetails': '1',
+                'addCaptions': '1',
+                'addScenes': '1',
+                'addHotSpots': '1',
+                'addBumpers': '1',
+                'captionFormat': 'data',
+            }, headers={
+                'X-Request-CID': cid,
+                'X-Request-Token': request_token,
+            })
+
+        general = video['general']
+        title = general['title']
+
+        stream_data = video['streamdata']
+        language = general.get('language_raw') or ''
+
+        # TODO: reverse more cdns and formats
+
+        cdn = stream_data['cdnType']
+        assert cdn == 'azure'
+
+        azure_locator = stream_data['azureLocator']
+
+        AZURE_URL = 'http://nx-p%02d.akamaized.net/'
+
+        for secure in ('s', ''):
+            cdn_shield = stream_data.get('cdnShieldHTTP%s' % secure.upper())
+            if cdn_shield:
+                azure_base = 'http%s://%s' % (secure, cdn_shield)
+                break
+        else:
+            azure_base = AZURE_URL % int(stream_data['azureAccount'].replace('nexxplayplus', ''))
+
+        is_ml = ',' in language
+        azure_m3u8_url = '%s%s/%s_src%s.ism/Manifest(format=m3u8-aapl)' % (
+            azure_base, azure_locator, video_id, ('_manifest' if is_ml else ''))
+
+        protection_token = try_get(
+            video, lambda x: x['protectiondata']['token'], compat_str)
+        if protection_token:
+            azure_m3u8_url += '?hdnts=%s' % protection_token
+
+        formats = self._extract_m3u8_formats(
+            azure_m3u8_url, video_id, 'mp4', entry_protocol='m3u8_native',
+            m3u8_id='%s-hls' % cdn)
+        self._sort_formats(formats)
+
+        return {
+            'id': video_id,
+            'title': title,
+            'alt_title': general.get('subtitle'),
+            'description': general.get('description'),
+            'release_year': int_or_none(general.get('year')),
+            'creator': general.get('studio') or general.get('studio_adref'),
+            'thumbnail': try_get(
+                video, lambda x: x['imagedata']['thumb'], compat_str),
+            'duration': parse_duration(general.get('runtime')),
+            'timestamp': int_or_none(general.get('uploaded')),
+            'episode_number': int_or_none(try_get(
+                video, lambda x: x['episodedata']['episode'])),
+            'season_number': int_or_none(try_get(
+                video, lambda x: x['episodedata']['season'])),
+            'formats': formats,
+        }