Class: ResolveURL

Inherits:
Object
  • Object
show all
Defined in:
lib/argh_ss/resolve_url.rb

Class Method Summary collapse

Class Method Details

.resolve(url) ⇒ Object 



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# File 'lib/argh_ss/resolve_url.rb', line 3

def self.resolve(url)
  if url_redirects(url).is_a?(String)
    return url_redirects(url)
  elsif rss_redirect(url).is_a?(String)
    return rss_redirect(url)
  else
    return nil
  end
end

.rss_redirect(url) ⇒ Object 



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# File 'lib/argh_ss/resolve_url.rb', line 33

def self.rss_redirect(url)
  begin
    rss = RSS::Parser.parse(url)
    case rss.feed_type
    when 'rss'
      rss.channel.link
    when 'atom'
      rss.id.content
    end
  rescue
    nil
  end
end

.url_redirects(uri_str, limit = 10) ⇒ Object 



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# File 'lib/argh_ss/resolve_url.rb', line 13

def self.url_redirects(uri_str, limit = 10)
  begin
    raise ArgumentError, 'Too many redirects!' if limit == 0

    response = Net::HTTP.get_response(URI(uri_str))

    case response
    when Net::HTTPSuccess then
      uri_str
    when Net::HTTPRedirection then
      location = response['location']
      url_redirects(location, limit - 1)
    else
      uri_str
    end
  rescue
    nil
  end
end