Class: Atig::IFilter::ExpandUrl

Inherits:
Object
  • Object
show all
Includes:
Util
Defined in:
lib/atig/ifilter/expand_url.rb

Instance Method Summary collapse

Methods included from ExceptionUtil

daemon, safe

Constructor Details

#initialize(context) ⇒ ExpandUrl

Returns a new instance of ExpandUrl.



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# File 'lib/atig/ifilter/expand_url.rb', line 11

def initialize(context)
  @log  = context.log
  @opts = context.opts
  @http = Atig::Http.new @log
  @cache = Atig::SizedHash.new 100
end

Instance Method Details

#call(status) ⇒ Object 



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# File 'lib/atig/ifilter/expand_url.rb', line 18

def call(status)
  target = if @opts.untiny_whole_urls then
             URI.regexp(%w[http https])
           else
             %r{
			http:// (?:
				(?: bit\.ly | (?: tin | rub) yurl\.com | j\.mp | t\.co
                            | htn.to
| is\.gd | cli\.gs | tr\.im | u\.nu | airme\.us
| ff\.im | twurl.nl | bkite\.com | tumblr\.com
| pic\.gd | sn\.im | digg\.com | goo\.gl)
				/ [0-9a-z=-]+ |
				blip\.fm/~ (?> [0-9a-z]+) (?! /) |
				flic\.kr/[a-z0-9/]+
			)
		   }ix
           end

  status.merge :text => status.text.gsub(target) {|url|
    x = @cache[url]
    if x then
      x
    else
      @cache[url] = resolve_http_redirect(URI(url)).to_s || url
    end
  }
end

#resolve_http_redirect(uri, limit = 3) ⇒ Object 



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# File 'lib/atig/ifilter/expand_url.rb', line 46

def resolve_http_redirect(uri, limit = 3)
  return uri if limit.zero? or uri.nil?
  log :debug, uri.inspect
  req = @http.req :head, uri
  @http.http(uri, 3, 2).request(req) do |res|
    break if not res.is_a?(Net::HTTPRedirection) or
      not res.key?("Location")
    begin
      location = URI(res["Location"])
    rescue URI::InvalidURIError
    end
    unless location.is_a? URI::HTTP
      begin
        location = URI.join(uri.to_s, res["Location"])
      rescue URI::InvalidURIError, URI::BadURIError
        # FIXME
      end
    end
    uri = resolve_http_redirect(location, limit - 1)
  end

  uri
rescue Errno::ETIMEDOUT, IOError, Timeout::Error, Errno::ECONNRESET => e
  log :error, e.inspect
  uri
end