code.delx.au - webdl/blob - sbs.py

   1 #!/usr/bin/env python
   2
   3 from common import grab_html, grab_json, grab_xml, download_hls, Node, append_to_qs
   4
   5 import json
   6
   7 BASE = "http://www.sbs.com.au"
   8 FULL_VIDEO_LIST = BASE + "/api/video_search/v2/?m=1&filters={section}{Programs}"
   9 VIDEO_URL = BASE + "/ondemand/video/single/%s"
  10
  11 NS = {
  12     "smil": "http://www.w3.org/2005/SMIL21/Language",
  13 }
  14
  15
  16 class SbsVideoNode(Node):
  17     def __init__(self, title, parent, url):
  18         Node.__init__(self, title, parent)
  19         self.video_id = url.split("/")[-1]
  20         self.can_download = True
  21
  22     def download(self):
  23         doc = grab_html(VIDEO_URL % self.video_id, 0)
  24         player_params = self.get_player_params(doc)
  25         release_url = player_params["releaseUrls"]["html"]
  26
  27         doc = grab_xml(release_url, 0)
  28         video = doc.xpath("//smil:video", namespaces=NS)[0]
  29         video_url = video.attrib["src"]
  30         if not video_url:
  31             raise Exception("Unsupported video %s: %s" % (self.video_id, self.title))
  32         filename = self.title + ".ts"
  33         return download_hls(filename, video_url)
  34
  35     def get_player_params(self, doc):
  36         for script in doc.xpath("//script"):
  37             if not script.text:
  38                 continue
  39             for line in script.text.split("\n"):
  40                 s = "var playerParams = {"
  41                 if s in line:
  42                     p1 = line.find(s) + len(s) - 1
  43                     p2 = line.find("};", p1) + 1
  44                     if p1 >= 0 and p2 > 0:
  45                         return json.loads(line[p1:p2])
  46         raise Exception("Unable to find player params for %s: %s" % (self.video_id, self.title))
  47
  48
  49 class SbsNavNode(Node):
  50     def create_video_node(self, entry_data):
  51         SbsVideoNode(entry_data["title"], self, entry_data["id"])
  52
  53     def find_existing_child(self, path):
  54         for child in self.children:
  55             if child.title == path:
  56                 return child
  57
  58 class SbsRootNode(SbsNavNode):
  59     def __init__(self, parent):
  60         Node.__init__(self, "SBS", parent)
  61
  62     def fill_children(self):
  63         all_video_entries = self.load_all_video_entries()
  64         category_and_entry_data = self.explode_videos_to_unique_categories(all_video_entries)
  65         for category_path, entry_data in category_and_entry_data:
  66             nav_node = self.create_nav_node(self, category_path)
  67             nav_node.create_video_node(entry_data)
  68
  69     def load_all_video_entries(self):
  70         offset = 1
  71         amount = 500
  72         while True:
  73             url = append_to_qs(FULL_VIDEO_LIST, {"range": "%s-%s" % (offset, offset+amount)})
  74             data = grab_json(url, 3600)
  75             entries = data["entries"]
  76             if len(entries) == 0:
  77                 break
  78             for entry in entries:
  79                 yield entry
  80             offset += amount
  81
  82     def explode_videos_to_unique_categories(self, all_video_entries):
  83         for entry_data in all_video_entries:
  84             for category_data in entry_data["media$categories"]:
  85                 category_path = self.calculate_category_path(
  86                     category_data["media$scheme"],
  87                     category_data["media$name"],
  88                 )
  89                 if category_path:
  90                     yield category_path, entry_data
  91
  92     def calculate_category_path(self, scheme, name):
  93         if not scheme:
  94             return
  95         if scheme == name:
  96             return
  97         name = name.split("/")
  98         if name[0] != scheme:
  99             name.insert(0, scheme)
 100         return name
 101
 102     def create_nav_node(self, parent, category_path):
 103         if not category_path:
 104             return parent
 105
 106         current_path = category_path[0]
 107         current_node = parent.find_existing_child(current_path)
 108         if not current_node:
 109             current_node = SbsNavNode(current_path, parent)
 110         return self.create_nav_node(current_node, category_path[1:])
 111
 112 def fill_nodes(root_node):
 113     SbsRootNode(root_node)