From b5a3c7f10927c9d55f6fdad5f5c002e02338642e Mon Sep 17 00:00:00 2001
From: Yen Chi Hsuan <yan12125@gmail.com>
Date: Sun, 7 Jun 2015 02:47:36 +0800
Subject: [PATCH] [iqiyi] Cache encryption keys

---
 youtube_dl/extractor/iqiyi.py | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/youtube_dl/extractor/iqiyi.py b/youtube_dl/extractor/iqiyi.py
index 15481b84b..9106dd074 100644
--- a/youtube_dl/extractor/iqiyi.py
+++ b/youtube_dl/extractor/iqiyi.py
@@ -3,6 +3,7 @@ from __future__ import unicode_literals
 
 import hashlib
 import math
+import os.path
 import random
 import re
 import time
@@ -11,7 +12,10 @@ import zlib
 
 from .common import InfoExtractor
 from ..compat import compat_urllib_parse
-from ..utils import ExtractorError
+from ..utils import (
+    ExtractorError,
+    url_basename,
+)
 
 
 class IqiyiIE(InfoExtractor):
@@ -207,12 +211,20 @@ class IqiyiIE(InfoExtractor):
         return raw_data
 
     def get_enc_key(self, swf_url, video_id):
+        filename, _ = os.path.splitext(url_basename(swf_url))
+        enc_key_json = self._downloader.cache.load('iqiyi-enc-key', filename)
+        if enc_key_json is not None:
+            return enc_key_json[0]
+
         req = self._request_webpage(
             swf_url, video_id, note='download swf content')
         cn = req.read()
         cn = zlib.decompress(cn[8:])
         pt = re.compile(b'MixerRemote\x08(?P<enc_key>.+?)\$&vv')
         enc_key = self._search_regex(pt, cn, 'enc_key').decode('utf8')
+
+        self._downloader.cache.store('iqiyi-enc-key', filename, [enc_key])
+
         return enc_key
 
     def _real_extract(self, url):