From 302efc19ea970c3737f088d21b69f440d7f440e3 Mon Sep 17 00:00:00 2001
From: dongmao zhang <deanraccoon@gmail.com>
Date: Thu, 9 Aug 2012 02:04:02 +0800
Subject: [PATCH] add youku support

---
 youtube_dl/InfoExtractors.py | 118 +++++++++++++++++++++++++++++++++++
 youtube_dl/__init__.py       |   1 +
 2 files changed, 119 insertions(+)

diff --git a/youtube_dl/InfoExtractors.py b/youtube_dl/InfoExtractors.py
index ddb4aa16b..e1fc93b6b 100644
--- a/youtube_dl/InfoExtractors.py
+++ b/youtube_dl/InfoExtractors.py
@@ -13,6 +13,8 @@ import urllib
 import urllib2
 import email.utils
 import xml.etree.ElementTree
+import random
+import math
 from urlparse import parse_qs
 
 try:
@@ -2955,3 +2957,119 @@ class MTVIE(InfoExtractor):
 		}
 
 		return [info]
+
+
+
+class YoukuIE(InfoExtractor):
+
+	_VALID_URL =  r'(?:http://)?v\.youku\.com/v_show/id_(?P<ID>[A-Za-z0-9]+)\.html'
+	IE_NAME = u'Youku'
+
+	def __init__(self, downloader=None):
+		InfoExtractor.__init__(self, downloader)
+
+	def report_download_webpage(self, file_id):
+		"""Report webpage download."""
+		self._downloader.to_screen(u'[Youku] %s: Downloading webpage' % file_id)
+
+	def report_extraction(self, file_id):
+		"""Report information extraction."""
+		self._downloader.to_screen(u'[Youku] %s: Extracting information' % file_id)
+
+	def _gen_sid(self):
+		nowTime = int(time.time() * 1000)
+		random1 = random.randint(1000,1998)
+		random2 = random.randint(1000,9999)
+
+		return "%d%d%d" %(nowTime,random1,random2)
+
+	def _get_file_ID_mix_string(self, seed):
+		mixed = []
+		source = list("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ/\:._-1234567890")
+		seed = float(seed)
+		for i in range(len(source)):
+			seed  =  (seed * 211 + 30031 ) % 65536
+			index  =  math.floor(seed / 65536 * len(source) )
+			mixed.append(source[int(index)])
+			source.remove(source[int(index)])
+		#return ''.join(mixed)
+		return mixed
+
+
+	def _get_file_id(self, fileId, seed):
+		mixed = self._get_file_ID_mix_string(seed)
+		ids = fileId.split('*')
+		realId = []
+		for ch in ids:
+			if ch is not '':
+				realId.append(mixed[int(ch)])
+		return ''.join(realId)
+
+	def _gen_key(self, key1, key2):
+		pass
+
+
+
+
+	def _real_extract(self, url):
+		mobj = re.match(self._VALID_URL, url)
+		if mobj is None:
+			self._downloader.trouble(u'ERROR: invalid URL: %s' % url)
+			return
+		video_id = mobj.group('ID')
+
+		info_url = 'http://v.youku.com/player/getPlayList/VideoIDS/' + video_id
+		print info_url
+
+		request = urllib2.Request(info_url, None, std_headers)
+		try:
+			self.report_download_webpage(video_id)
+			jsondata = urllib2.urlopen(request).read()
+		except (urllib2.URLError, httplib.HTTPException, socket.error) as err:
+			self._downloader.trouble(u'ERROR: Unable to retrieve video webpage: %s' % str(err))
+			return
+
+		self.report_extraction(video_id)
+		try:
+			config = json.loads(jsondata)
+
+			video_title =  config['data'][0]['title']
+			seed = config['data'][0]['seed']
+			#choose format flv first
+			format = 'flv'
+
+			fileid = config['data'][0]['streamfileids'][format]
+			seg_number = len(config['data'][0]['segs'][format])
+			keys=[]
+			for i in xrange(seg_number):
+				keys.append(config['data'][0]['segs'][format][i]['k'])
+
+			#TODO check error
+			#youku only could be viewed from mainland china
+		except:
+			self._downloader.trouble(u'ERROR: unable to extract info section')
+			return
+
+		files_info=[]
+		sid = self._gen_sid()
+		fileid = self._get_file_id(fileid, seed)
+
+		#column 8,9 of fileid represent the segment number
+		#fileid[7:9] should be changed
+		for index, key in enumerate(keys):
+
+			temp_fileid = '%s%02x%s' % (fileid[0:8], index, fileid[10:])
+			download_url = 'http://f.youku.com/player/getFlvPath/sid/%s_%02x/st/flv/fileid/%s?k=%s' % (sid, index, temp_fileid, key)
+			print download_url
+			info = {
+				'id': '%s_part%02x' % (video_id, index),
+				'url': download_url,
+				'uploader': None,
+				'title': '%s_part%02x' % (video_title, index),
+				'ext': u'flv',
+				'format': u'NA'
+			}
+			files_info.append(info)
+
+		return files_info
+# vim: tabstop=4 shiftwidth=4 softtabstop=4 noexpandtab
diff --git a/youtube_dl/__init__.py b/youtube_dl/__init__.py
index 86951840d..84b972d51 100644
--- a/youtube_dl/__init__.py
+++ b/youtube_dl/__init__.py
@@ -351,6 +351,7 @@ def gen_extractors():
 		MixcloudIE(),
 		StanfordOpenClassroomIE(),
 		MTVIE(),
+		YoukuIE(),
 
 		GenericIE()
 	]