[vidzi] Fix extraction as described in #6819

youtube_dl/extractor/vidzi.py

@@ -2,6 +2,8 @@
 from __future__ import unicode_literals
 
 from .common import InfoExtractor
+import re
+import string
 
 
 class VidziIE(InfoExtractor):
@@ -16,10 +18,42 @@ class VidziIE(InfoExtractor):
         },
     }
 
+    def int2base(self, x, base):
+        digs = string.digits + string.ascii_letters
+        if x < 0:
+            sign = -1
+        elif x == 0:
+            return digs[0]
+        else:
+            sign = 1
+        x *= sign
+        digits = []
+        while x:
+            digits.append(digs[x % base])
+            x = x // base
+        if sign < 0:
+            digits.append('-')
+        digits.reverse()
+        return ''.join(digits)
+
+    def unpack_packer(self, p, a, c, k, s):
+        k = k.split(s)
+        for i in range(int(c) - 1, 1, -1):
+            p = re.sub('\\b' + self.int2base(i, int(a)) + '\\b', k[i], p)
+        return p
+
+    def unpack(self, content):
+        packers = re.findall(r'function\(p,a,c,k,e,d\){.+}\(\'.*\',\d+,\d+,\'[^\']+\'\.split\(\'.\'\)', content)
+        for (packer) in packers:
+            p, a, c, k, s = re.search(r'function\(p,a,c,k,e,d\){.+}\(\'(.*)\',(\d+),(\d+),\'([^\']+)\'\.split\(\'(.)\'\)', packer).groups()
+            content = content.replace(packer, self.unpack_packer(p, a, c, k, s))
+        return content
+
     def _real_extract(self, url):
         video_id = self._match_id(url)
 
         webpage = self._download_webpage(url, video_id)
+        webpage = self.unpack(webpage)
         video_url = self._html_search_regex(
             r'{\s*file\s*:\s*"([^"]+)"\s*}', webpage, 'video url')
         title = self._html_search_regex(