[letv] Fix LetvCloud extraction

youtube_dl/extractor/letv.py

@@ -5,11 +5,13 @@
 import re
 import time
 import base64
+import hashlib
 
 from .common import InfoExtractor
 from ..compat import (
     compat_urllib_parse,
     compat_ord,
+    compat_str,
 )
 from ..utils import (
     determine_ext,
@@ -258,6 +260,7 @@ class LetvCloudIE(InfoExtractor):
         },
     }, {
         'url': 'http://yuntv.letv.com/bcloud.html?uu=p7jnfw5hw9&vu=ec93197892&pu=2c7cd40209&auto_play=1&gpcflag=1&width=640&height=360',
+        'md5': 'e03d9cc8d9c13191e1caf277e42dbd31',
         'info_dict': {
             'id': 'p7jnfw5hw9_ec93197892',
             'ext': 'mp4',
@@ -265,6 +268,7 @@ class LetvCloudIE(InfoExtractor):
         },
     }, {
         'url': 'http://yuntv.letv.com/bcloud.html?uu=p7jnfw5hw9&vu=187060b6fd',
+        'md5': 'cb988699a776b22d4a41b9d43acfb3ac',
         'info_dict': {
             'id': 'p7jnfw5hw9_187060b6fd',
             'ext': 'mp4',
@@ -272,21 +276,37 @@ class LetvCloudIE(InfoExtractor):
         },
     }]
 
-    def _real_extract(self, url):
-        uu_mobj = re.search('uu=([\w]+)', url)
-        vu_mobj = re.search('vu=([\w]+)', url)
+    @staticmethod
+    def sign_data(obj):
+        if obj['cf'] == 'flash':
+            salt = '2f9d6924b33a165a6d8b5d3d42f4f987'
+            items = ['cf', 'format', 'ran', 'uu', 'ver', 'vu']
+        elif obj['cf'] == 'html5':
+            salt = 'fbeh5player12c43eccf2bec3300344'
+            items = ['cf', 'ran', 'uu', 'bver', 'vu']
+        input_data = ''.join([item + obj[item] for item in items]) + salt
+        obj['sign'] = hashlib.md5(input_data.encode('utf-8')).hexdigest()
 
-        if not uu_mobj or not vu_mobj:
-            raise ExtractorError('Invalid URL: %s' % url, expected=True)
+    def _get_formats(self, cf, uu, vu, media_id):
+        def get_play_json(cf, timestamp):
+            data = {
+                'cf': cf,
+                'ver': '2.2',
+                'bver': 'firefox44.0',
+                'format': 'json',
+                'uu': uu,
+                'vu': vu,
+                'ran': compat_str(timestamp),
+            }
+            self.sign_data(data)
+            return self._download_json(
+                'http://api.letvcloud.com/gpc.php?' + compat_urllib_parse.urlencode(data),
+                media_id, 'Downloading playJson data for type %s' % cf)
 
-        uu = uu_mobj.group(1)
-        vu = vu_mobj.group(1)
-        media_id = uu + '_' + vu
-
-        play_json_req = sanitized_Request(
-            'http://api.letvcloud.com/gpc.php?cf=html5&sign=signxxxxx&ver=2.2&format=json&' +
-            'uu=' + uu + '&vu=' + vu)
-        play_json = self._download_json(play_json_req, media_id, 'Downloading playJson data')
+        play_json = get_play_json(cf, time.time())
+        # The server time may be different from local time
+        if play_json.get('code') == 10071:
+            play_json = get_play_json(cf, play_json['timestamp'])
 
         if not play_json.get('data'):
             if play_json.get('message'):
@@ -312,6 +332,21 @@ def b64decode(s):
                 'width': int_or_none(play_url.get('vwidth')),
                 'height': int_or_none(play_url.get('vheight')),
             })
+
+        return formats
+
+    def _real_extract(self, url):
+        uu_mobj = re.search('uu=([\w]+)', url)
+        vu_mobj = re.search('vu=([\w]+)', url)
+
+        if not uu_mobj or not vu_mobj:
+            raise ExtractorError('Invalid URL: %s' % url, expected=True)
+
+        uu = uu_mobj.group(1)
+        vu = vu_mobj.group(1)
+        media_id = uu + '_' + vu
+
+        formats = self._get_formats('flash', uu, vu, media_id) + self._get_formats('html5', uu, vu, media_id)
         self._sort_formats(formats)
 
         return {