[youku]cna hacks

src/you_get/extractors/youku.py

@@ -23,10 +23,17 @@ def fetch_cna():
             if cookie.name == 'cna' and cookie.domain == '.youku.com':
                 log.i('Found cna in imported cookies. Use it')
                 return quote_cna(cookie.value)
-    url = 'http://gm.mmstat.com/yt/ykcomment.play.commentInit?cna='
+    url = 'http://log.mmstat.com/eg.js'
     req = urllib.request.urlopen(url)
-    cna = req.info()['Set-Cookie'].split(';')[0].split('=')[1]
-    return quote_cna(cna)
+    headers = req.getheaders()
+    for header in headers:
+        if header[0].lower() == 'set-cookie':
+            n_v = header[1].split(';')[0]
+            name, value = n_v.split('=')
+            if name == 'cna':
+                return quote_cna(value)
+    log.w('It seems that the client failed to fetch a cna cookie. Please load your own cookie if possible')
+    return quote_cna('DOG4EdW4qzsCAbZyXbU+t7Jt')
 
 def youku_ups(vid, ccode='0401'):
     url = 'https://ups.youku.com/ups/get.json?vid={}&ccode={}'.format(vid, ccode)