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 # Needed to download the video XML file, which is in turn
  22 # needed because it contains the junk we need to construct
  23 # the video URL.
  24 require 'net/http'
  25 require 'uri'
  26
  27
  28 class Vimeo < Website
  29
  30   VALID_VIMEO_URL_REGEX = /^(http:\/\/)?(www\.)?vimeo\.com\/(moogaloop\.swf\?clip_id=)?(\d+)/
  31
  32   def self.owns_url?(url)
  33     return url =~ VALID_VIMEO_URL_REGEX
  34   end
  35
  36
  37   def get_video_url(url)
  38     # First, figure out the video id from the URL.
  39     # Then, use the video id to construct the video details URL.
  40     # Get the video details page, and parse the resulting XML for
  41     # the junk we need to construct the video URL. Note that the file
  42     # URL given in the XML is *not* valid.
  43     video_id = parse_video_id(url)
  44     details_url = "http://www.vimeo.com/moogaloop/load/clip:#{video_id}/local"
  45     details_data = get_page_data(details_url)
  46
  47
  48     request_signature = parse_request_signature(details_data)
  49     request_signature_expires = parse_request_signature_expires(details_data)
  50     quality = parse_quality(details_data)
  51
  52     # Being slightly explicit about what we're doing here...
  53     video_url = "http://www.vimeo.com/moogaloop/play/clip:#{video_id}/#{request_signature}/#{request_signature_expires}/?q=#{quality}"
  54
  55     return video_url
  56   end
  57
  58
  59   protected;
  60
  61   def parse_video_id(url)
  62     video_id = nil
  63
  64     # First, try to get the video id from the end of the URL.
  65     video_id_regex = /\/(\d+)$/
  66     matches = video_id_regex.match(url)
  67
  68     if matches.nil?
  69       # If that didn't work, the URL must be of the clip_id= form.
  70       video_id_regex = /clip_id\=(\d+)/
  71       matches = video_id_regex.match(url)
  72       video_id = matches[1] if not (matches.nil? || matches.length < 1)
  73     else
  74       video_id = matches[1] if not (matches.nil? || matches.length < 1)
  75     end
  76
  77     return video_id
  78   end
  79
  80
  81   def parse_request_signature(page_data)
  82     # It's XML.
  83     rs_regex = /<request_signature>(.*?)<\/request_signature>/
  84     matches = rs_regex.match(page_data)
  85     request_signature = matches[1] if not (matches.nil? || matches.length < 1)
  86
  87     return request_signature
  88   end
  89
  90
  91   def parse_request_signature_expires(page_data)
  92     rse_regex = /<request_signature_expires>(.*?)<\/request_signature_expires>/
  93     matches = rse_regex.match(page_data)
  94     request_signature_expires = matches[1] if not (matches.nil? || matches.length < 1)
  95
  96     return request_signature_expires
  97   end
  98
  99
 100   def parse_quality(page_data)
 101     quality_regex = /<isHD>([01])<\isHD>/
 102     matches = quality_regex.match(page_data)
 103     is_hd = matches[1] if not (matches.nil? || matches.length < 1)
 104
 105     if is_hd == '1' then
 106        # High-definition
 107       return "hd"
 108     else
 109       # Standard-definition
 110       return "sd"
 111     end
 112   end
 113
 114
 115   def get_page_data(url)
 116     uri = URI.parse(url)
 117
 118     response = Net::HTTP.start(uri.host, uri.port) do |http|
 119       http.get(uri.path)
 120     end
 121
 122     return response.body
 123   end
 124
 125 end