[ADN] Use PhantomJS to get the subtitle encryption key (closes #12724)

youtube_dl/extractor/adn.py

@@ -6,14 +6,24 @@ import binascii
 import json
 import os
 import random
+import subprocess
+import tempfile
+import re
 
 from .common import InfoExtractor
 from ..aes import aes_cbc_decrypt
 from ..compat import (
     compat_b64decode,
     compat_ord,
+    compat_kwargs,
+    compat_urlparse,
 )
 from ..utils import (
+    check_executable,
+    get_exe_version,
+    is_outdated_version,
+    encodeArgument,
+    std_headers,
     bytes_to_intlist,
     bytes_to_long,
     ExtractorError,
@@ -26,6 +36,219 @@ from ..utils import (
 )
 
 
+def cookie_to_dict(cookie):
+    cookie_dict = {
+        'name': cookie.name,
+        'value': cookie.value,
+    }
+    if cookie.port_specified:
+        cookie_dict['port'] = cookie.port
+    if cookie.domain_specified:
+        cookie_dict['domain'] = cookie.domain
+    if cookie.path_specified:
+        cookie_dict['path'] = cookie.path
+    if cookie.expires is not None:
+        cookie_dict['expires'] = cookie.expires
+    if cookie.secure is not None:
+        cookie_dict['secure'] = cookie.secure
+    if cookie.discard is not None:
+        cookie_dict['discard'] = cookie.discard
+    try:
+        if (cookie.has_nonstandard_attr('httpOnly')
+                or cookie.has_nonstandard_attr('httponly')
+                or cookie.has_nonstandard_attr('HttpOnly')):
+            cookie_dict['httponly'] = True
+    except TypeError:
+        pass
+    return cookie_dict
+
+
+def cookie_jar_to_list(cookie_jar):
+    return [cookie_to_dict(cookie) for cookie in cookie_jar]
+
+
+class PhantomJSwrapper(object):
+    """PhantomJS wrapper class
+    This class is experimental.
+    """
+
+    _TEMPLATE = r'''
+        phantom.onError = function(msg, trace) {{
+          var msgStack = ['PHANTOM ERROR: ' + msg];
+          if(trace && trace.length) {{
+            msgStack.push('TRACE:');
+            trace.forEach(function(t) {{
+              msgStack.push(' -> ' + (t.file || t.sourceURL) + ': ' + t.line
+                + (t.function ? ' (in function ' + t.function +')' : ''));
+            }});
+          }}
+          console.error(msgStack.join('\n'));
+          phantom.exit(1);
+        }};
+        var page = require('webpage').create();
+        var fs = require('fs');
+        var read = {{ mode: 'r', charset: 'utf-8' }};
+        var write = {{ mode: 'w', charset: 'utf-8' }};
+        JSON.parse(fs.read("{cookies}", read)).forEach(function(x) {{
+          phantom.addCookie(x);
+        }});
+        page.settings.resourceTimeout = {timeout};
+        page.settings.userAgent = "{ua}";
+        page.onLoadStarted = function() {{
+          page.evaluate(function() {{
+            delete window._phantom;
+            delete window.callPhantom;
+          }});
+        }};
+        var saveAndExit = function() {{
+          fs.write("{html}", page.content, write);
+          fs.write("{cookies}", JSON.stringify(phantom.cookies), write);
+          phantom.exit();
+        }};
+        page.onLoadFinished = function(status) {{
+          if(page.url === "") {{
+            page.setContent(fs.read("{html}", read), "{url}");
+          }}
+          else {{
+            {jscode}
+          }}
+        }};
+        page.open("");
+    '''
+
+    _TMP_FILE_NAMES = ['script', 'html', 'cookies']
+
+    @staticmethod
+    def _version():
+        return get_exe_version('phantomjs', version_re=r'([0-9.]+)')
+
+    def __init__(self, extractor, required_version=None, timeout=10000):
+        self._TMP_FILES = {}
+
+        self.exe = check_executable('phantomjs', ['-v'])
+        if not self.exe:
+            raise ExtractorError('PhantomJS executable not found in PATH, '
+                                 'download it from http://phantomjs.org',
+                                 expected=True)
+
+        self.extractor = extractor
+
+        if required_version:
+            version = self._version()
+            if is_outdated_version(version, required_version):
+                self.extractor._downloader.report_warning(
+                    'Your copy of PhantomJS is outdated, update it to version '
+                    '%s or newer if you encounter any errors.' % required_version)
+
+        self.options = {
+            'timeout': timeout,
+        }
+        for name in self._TMP_FILE_NAMES:
+            tmp = tempfile.NamedTemporaryFile(delete=False)
+            tmp.close()
+            self._TMP_FILES[name] = tmp
+
+    def __del__(self):
+        for name in self._TMP_FILE_NAMES:
+            try:
+                os.remove(self._TMP_FILES[name].name)
+            except (IOError, OSError, KeyError):
+                pass
+
+    def _save_cookies(self, url):
+        cookies = cookie_jar_to_list(self.extractor._downloader.cookiejar)
+        for cookie in cookies:
+            if 'path' not in cookie:
+                cookie['path'] = '/'
+            if 'domain' not in cookie:
+                cookie['domain'] = compat_urlparse.urlparse(url).netloc
+        with open(self._TMP_FILES['cookies'].name, 'wb') as f:
+            f.write(json.dumps(cookies).encode('utf-8'))
+
+    def _load_cookies(self):
+        with open(self._TMP_FILES['cookies'].name, 'rb') as f:
+            cookies = json.loads(f.read().decode('utf-8'))
+        for cookie in cookies:
+            if cookie['httponly'] is True:
+                cookie['rest'] = {'httpOnly': None}
+            if 'expiry' in cookie:
+                cookie['expire_time'] = cookie['expiry']
+            self.extractor._set_cookie(**compat_kwargs(cookie))
+
+    def get(self, url, html=None, video_id=None, note=None, note2='Executing JS on webpage', headers={}, jscode='saveAndExit();'):
+        """
+        Downloads webpage (if needed) and executes JS
+        Params:
+            url: website url
+            html: optional, html code of website
+            video_id: video id
+            note: optional, displayed when downloading webpage
+            note2: optional, displayed when executing JS
+            headers: custom http headers
+            jscode: code to be executed when page is loaded
+        Returns tuple with:
+            * downloaded website (after JS execution)
+            * anything you print with `console.log` (but not inside `page.execute`!)
+        In most cases you don't need to add any `jscode`.
+        It is executed in `page.onLoadFinished`.
+        `saveAndExit();` is mandatory, use it instead of `phantom.exit()`
+        It is possible to wait for some element on the webpage, for example:
+            var check = function() {
+              var elementFound = page.evaluate(function() {
+                return document.querySelector('#b.done') !== null;
+              });
+              if(elementFound)
+                saveAndExit();
+              else
+                window.setTimeout(check, 500);
+            }
+            page.evaluate(function(){
+              document.querySelector('#a').click();
+            });
+            check();
+        """
+        if 'saveAndExit();' not in jscode:
+            raise ExtractorError('`saveAndExit();` not found in `jscode`')
+        if not html:
+            html = self.extractor._download_webpage(url, video_id, note=note, headers=headers)
+        with open(self._TMP_FILES['html'].name, 'wb') as f:
+            f.write(html.encode('utf-8'))
+
+        self._save_cookies(url)
+
+        replaces = self.options
+        replaces['url'] = url
+        user_agent = headers.get('User-Agent') or std_headers['User-Agent']
+        replaces['ua'] = user_agent.replace('"', '\\"')
+        replaces['jscode'] = jscode
+
+        for x in self._TMP_FILE_NAMES:
+            replaces[x] = self._TMP_FILES[x].name.replace('\\', '\\\\').replace('"', '\\"')
+
+        with open(self._TMP_FILES['script'].name, 'wb') as f:
+            f.write(self._TEMPLATE.format(**replaces).encode('utf-8'))
+
+        if video_id is None:
+            self.extractor.to_screen('%s' % (note2,))
+        else:
+            self.extractor.to_screen('%s: %s' % (video_id, note2))
+
+        p = subprocess.Popen([
+            self.exe, '--ssl-protocol=any',
+            self._TMP_FILES['script'].name
+        ], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+        out, err = p.communicate()
+        if p.returncode != 0:
+            raise ExtractorError(
+                'Executing JS failed\n:' + encodeArgument(err))
+        with open(self._TMP_FILES['html'].name, 'rb') as f:
+            html = f.read().decode('utf-8')
+
+        self._load_cookies()
+
+        return (html, encodeArgument(out))
+
+
 class ADNIE(InfoExtractor):
     IE_DESC = 'Anime Digital Network'
     _VALID_URL = r'https?://(?:www\.)?animedigitalnetwork\.fr/video/[^/]+/(?P<id>\d+)'
@@ -54,7 +277,7 @@ class ADNIE(InfoExtractor):
     def _ass_subtitles_timecode(seconds):
         return '%01d:%02d:%02d.%02d' % (seconds / 3600, (seconds % 3600) / 60, seconds % 60, (seconds % 1) * 100)
 
-    def _get_subtitles(self, sub_path, video_id):
+    def _get_subtitles(self, sub_path, video_id, url, webpage):
         if not sub_path:
             return None
 
@@ -70,10 +293,36 @@ class ADNIE(InfoExtractor):
         if not enc_subtitles:
             return None
 
-        # http://animedigitalnetwork.fr/components/com_vodvideo/videojs/adn-vjs.min.js
+        # Get the second half of the encryption key
+        phantom = PhantomJSwrapper(self, required_version='2.0')
+        _, logs = phantom.get(url, html=webpage, video_id=video_id, jscode="""
+          function getKey() {
+            var key = page.evaluate(function() {
+              return window.videojs &&
+                window.videojs.players["adn-video-js"] &&
+                window.videojs.players["adn-video-js"].onChromecastCustomData().key;
+            })
+            if (key) {
+              console.log('Key is : ' + key);
+              saveAndExit();
+            } else {
+              setTimeout(getKey, 1 * 1000);
+            }
+          }
+          getKey();
+          window.setTimeout(function() {
+            console.error('Timed out');
+            saveAndExit();
+          }, 60 * 1000);
+        """)
+        match = re.match(re.compile(r'Key is : (.+)\n', re.MULTILINE), logs)
+        if 'Timed out' in logs or match is None:
+            raise ExtractorError('Could not get the key')
+        key = match.group(1).strip()
+
         dec_subtitles = intlist_to_bytes(aes_cbc_decrypt(
             bytes_to_intlist(compat_b64decode(enc_subtitles[24:])),
-            bytes_to_intlist(binascii.unhexlify(self._K + '4b8ef13ec1872730')),
+            bytes_to_intlist(binascii.unhexlify(self._K + key)),
             bytes_to_intlist(compat_b64decode(enc_subtitles[:24]))
         ))
         subtitles_json = self._parse_json(
@@ -201,7 +450,7 @@ Format: Marked,Start,End,Style,Name,MarginL,MarginR,MarginV,Effect,Text'''
             'description': strip_or_none(metas.get('summary') or video_info.get('resume')),
             'thumbnail': video_info.get('image'),
             'formats': formats,
-            'subtitles': self.extract_subtitles(sub_path, video_id),
+            'subtitles': self.extract_subtitles(sub_path, video_id, url, webpage),
             'episode': metas.get('subtitle') or video_info.get('videoTitle'),
             'series': video_info.get('playlistTitle'),
         }