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

   1 import requests_cache
   2 from common import grab_html, grab_json, grab_xml, download_hls, download_mpd, Node, append_to_qs
   3
   4 import json
   5 import logging
   6 import sys
   7
   8 BASE = "https://www.sbs.com.au"
   9 FULL_VIDEO_LIST = BASE + "/api/video_feed/f/Bgtm9B/sbs-section-programs/"
  10 VIDEO_URL = BASE + "/ondemand/video/single/%s"
  11
  12 NS = {
  13     "smil": "http://www.w3.org/2005/SMIL21/Language",
  14 }
  15
  16
  17 class SbsVideoNode(Node):
  18     def __init__(self, title, parent, url):
  19         Node.__init__(self, title, parent)
  20         self.video_id = url.split("/")[-1]
  21         self.can_download = True
  22
  23     def download(self):
  24         with requests_cache.disabled():
  25             doc = grab_html(VIDEO_URL % self.video_id)
  26         player_params = self.get_player_params(doc)
  27
  28         error = player_params.get("error", None)
  29         if error:
  30             print("Cannot download:", error)
  31             return False
  32
  33         release_url = player_params["releaseUrls"]["html"]
  34         filename = self.title + ".ts"
  35
  36         hls_url = self.get_hls_url(release_url)
  37         if hls_url:
  38             return download_hls(filename, hls_url)
  39         else:
  40             return download_mpd(filename, release_url)
  41
  42     def get_player_params(self, doc):
  43         for script in doc.xpath("//script"):
  44             if not script.text:
  45                 continue
  46             for line in script.text.split("\n"):
  47                 s = "var playerParams = {"
  48                 if s in line:
  49                     p1 = line.find(s) + len(s) - 1
  50                     p2 = line.find("};", p1) + 1
  51                     if p1 >= 0 and p2 > 0:
  52                         return json.loads(line[p1:p2])
  53         raise Exception("Unable to find player params for %s: %s" % (self.video_id, self.title))
  54
  55     def get_hls_url(self, release_url):
  56         with requests_cache.disabled():
  57             doc = grab_xml("https:" + release_url.replace("http:", "").replace("https:", ""))
  58             video = doc.xpath("//smil:video", namespaces=NS)
  59             if not video:
  60                 return
  61             video_url = video[0].attrib["src"]
  62             return video_url
  63
  64 class SbsNavNode(Node):
  65     def create_video_node(self, entry_data):
  66         SbsVideoNode(entry_data["title"], self, entry_data["id"])
  67
  68     def find_existing_child(self, path):
  69         for child in self.children:
  70             if child.title == path:
  71                 return child
  72
  73 class SbsRootNode(SbsNavNode):
  74     def __init__(self, parent):
  75         Node.__init__(self, "SBS", parent)
  76
  77     def fill_children(self):
  78         all_video_entries = self.load_all_video_entries()
  79         category_and_entry_data = self.explode_videos_to_unique_categories(all_video_entries)
  80         for category_path, entry_data in category_and_entry_data:
  81             nav_node = self.create_nav_node(self, category_path)
  82             nav_node.create_video_node(entry_data)
  83
  84     def load_all_video_entries(self):
  85         channels = [
  86             "Channel/SBS1",
  87             "Channel/SBS Food",
  88             "Channel/SBS VICELAND",
  89             "Channel/SBS World Movies",
  90             "Channel/Web Exclusive",
  91         ]
  92
  93         all_entries = {}
  94         for channel in channels:
  95             self.load_all_video_entries_for_channel(all_entries, channel)
  96
  97         all_entries = list(all_entries.values())
  98         print(" SBS fetched", len(all_entries))
  99         return all_entries
 100
 101     def load_all_video_entries_for_channel(self, all_entries, channel):
 102         offset = 1
 103         page_size = 500
 104         duplicate_warning = False
 105
 106         while True:
 107             entries = self.fetch_entries_page(channel, offset, page_size)
 108             if len(entries) == 0:
 109                 break
 110
 111             for entry in entries:
 112                 guid = entry["guid"]
 113                 if guid in entries and not duplicate_warning:
 114                     # https://bitbucket.org/delx/webdl/issues/102/recent-sbs-series-missing
 115                     logging.warn("SBS returned a duplicate response, data is probably missing. Try decreasing page_size.")
 116                     duplicate_warning = True
 117
 118                 all_entries[guid] = entry
 119
 120             offset += page_size
 121             if os.isatty(sys.stdout.fileno()):
 122                 sys.stdout.write(".")
 123                 sys.stdout.flush()
 124
 125     def fetch_entries_page(self, channel, offset, page_size):
 126         url = append_to_qs(FULL_VIDEO_LIST, {
 127             "range": "%s-%s" % (offset, offset+page_size-1),
 128             "byCategories": channel,
 129         })
 130         data = grab_json(url)
 131         if "entries" not in data:
 132             raise Exception("Missing data in SBS response", data)
 133         return data["entries"]
 134
 135     def explode_videos_to_unique_categories(self, all_video_entries):
 136         for entry_data in all_video_entries:
 137             for category_data in entry_data["media$categories"]:
 138                 category_path = self.calculate_category_path(
 139                     category_data["media$scheme"],
 140                     category_data["media$name"],
 141                 )
 142                 if category_path:
 143                     yield category_path, entry_data
 144
 145     def calculate_category_path(self, scheme, name):
 146         if not scheme:
 147             return
 148         if scheme == name:
 149             return
 150         name = name.split("/")
 151         if name[0] != scheme:
 152             name.insert(0, scheme)
 153         return name
 154
 155     def create_nav_node(self, parent, category_path):
 156         if not category_path:
 157             return parent
 158
 159         current_path = category_path[0]
 160         current_node = parent.find_existing_child(current_path)
 161         if not current_node:
 162             current_node = SbsNavNode(current_path, parent)
 163         return self.create_nav_node(current_node, category_path[1:])
 164
 165 def fill_nodes(root_node):
 166     SbsRootNode(root_node)