src/websites/vimeo.rb

   1 #
   2 # Copyright Michael Orlitzky
   3 #
   4 # http://michael.orlitzky.com/
   5 #
   6 # This program is free software: you can redistribute it and/or modify
   7 # it under the terms of the GNU General Public License as published by
   8 # the Free Software Foundation, either version 3 of the License, or
   9 # (at your option) any later version.
  10 #
  11 # This program is distributed in the hope that it will be useful,
  12 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  13 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  14 # GNU General Public License for more details.
  15 #
  16 # http://www.fsf.org/licensing/licenses/gpl.html
  17 #
  18
  19 require 'src/website'
  20
  21
  22 class Vimeo < Website
  23
  24   VALID_VIMEO_URL_REGEX = /^(http:\/\/)?(www\.)?vimeo\.com\/(moogaloop\.swf\?clip_id=)?(\d+)/
  25
  26   def self.owns_url?(url)
  27     return url =~ VALID_VIMEO_URL_REGEX
  28   end
  29
  30
  31   def get_video_url()
  32     # First, figure out the video id from the URL.
  33     # Then, use the video id to construct the video details URL.
  34     # Get the video details page, and parse the resulting XML for
  35     # the junk we need to construct the video URL. Note that the file
  36     # URL given in the XML is *not* valid.
  37     video_id = self.parse_video_id()
  38     details_url = "http://vimeo.com/moogaloop/load/clip:#{video_id}/local"
  39     details_data = get_page_data(details_url)
  40
  41     request_signature = parse_request_signature(details_data)
  42     request_signature_expires = parse_request_signature_expires(details_data)
  43     quality = parse_quality(details_data)
  44
  45     referer = "http://a.vimeocdn.com/p/flash/moogaloop/5.1.15/moogaloop.swf"
  46     referer += "?v=1.0.0"
  47     referer += "&time=#{request_signature_expires}"
  48     self.headers['Referer'] = referer
  49
  50     video_url = "http://player.vimeo.com/play_redirect?clip_id=#{video_id}"
  51     video_url += "&sig=#{request_signature}"
  52     video_url += "&time=#{request_signature_expires}"
  53     video_url += "&quality=#{quality}"
  54     video_url += "&codecs=H264,VP8,VP6"
  55
  56     return video_url
  57   end
  58
  59
  60   def get_video_filename()
  61     # The default behavior is no good here, use the video
  62     # id with an extension tacked onto it.
  63     return (self.parse_video_id() + '.flv')
  64   end
  65
  66
  67   protected;
  68
  69   def parse_video_id()
  70     video_id = nil
  71
  72     # First, try to get the video id from the end of the URL.
  73     video_id_regex = /\/(\d+)$/
  74     matches = video_id_regex.match(@url)
  75
  76     if matches.nil?
  77       # If that didn't work, the URL must be of the clip_id= form.
  78       video_id_regex = /clip_id\=(\d+)/
  79       matches = video_id_regex.match(@url)
  80       video_id = matches[1] if not matches.nil? || matches.length < 1
  81     else
  82       video_id = matches[1] if not matches.nil? || matches.length < 1
  83     end
  84
  85     return video_id
  86   end
  87
  88
  89   def parse_request_signature(page_data)
  90     # It's XML.
  91     rs_regex = /<request_signature>(.*?)<\/request_signature>/
  92     matches = rs_regex.match(page_data)
  93     request_signature = matches[1] if not matches.nil? || matches.length < 1
  94
  95     return request_signature
  96   end
  97
  98
  99   def parse_request_signature_expires(page_data)
 100     rse_regex = /<request_signature_expires>(.*?)<\/request_signature_expires>/
 101     matches = rse_regex.match(page_data)
 102     rse = matches[1] if not matches.nil? || matches.length < 1
 103
 104     return rse
 105   end
 106
 107
 108   def parse_quality(page_data)
 109     quality_regex = /<isHD>([01])<\/isHD>/
 110     matches = quality_regex.match(page_data)
 111     is_hd = matches[1] if not matches.nil? || matches.length < 1
 112
 113     if is_hd == '1' then
 114        # High-definition
 115       return "hd"
 116     else
 117       # Standard-definition
 118       return "sd"
 119     end
 120   end
 121
 122
 123 end