Ruby Net::HTTP time out

Question

I'm trying to write my first Ruby program, but have a problem. The code has to download 32 MP3 files over HTTP. It actually downloads a few, then times-out.

I tried setting a timeout period, but it makes no difference. Running the code under Windows, Cygwin and Mac OS X has the same result.

This is the code:

require 'rubygems'
require 'open-uri'
require 'nokogiri'
require 'set'
require 'net/http'
require 'uri'

 puts "\n Up and running!\n\n"

 links_set = {}

 pages = ['http://www.vimeo.com/siai/videos/sort:oldest',
   'http://www.vimeo.com/siai/videos/page:2/sort:oldest',
   'http://www.vimeo.com/siai/videos/page:3/sort:oldest']

 pages.each do |page|
  doc = Nokogiri::HTML(open(page))
  doc.search('//*[@href]').each do |m|
   video_id = m[:href]
   if video_id.match(/^\/(\d+)$/i)
     links_set[video_id[/\d+/]] = m.children[0].to_s.split(" at ")[0].split(" -- ")[0]
    end
   end
 end

 links = links_set.to_a

 p links

 cookie = ''
 file_name = ''

 open("http://www.tubeminator.com") {|f|
   cookie = f.meta['set-cookie'].split(';')[0]
 }

 links.each do |link|
  open("http://www.tubeminator.com/ajax.php?function=downloadvideo&url=http%3A%2F%2Fwww.vimeo.com%2F" + link[0],
   "Cookie" => cookie) {|f|
      puts f.read
  } 

  open("http://www.tubeminator.com/ajax.php?function=convertvideo&start=0&duration=1120&size=0&format=mp3&vq=high&aq=high",
   "Cookie" => cookie) {|f|
      file_name = f.read
   }
  puts file_name

  Net::HTTP.start("www.tubeminator.com") { |http|
   #http.read_timeout = 3600 # 1 hour
     resp = http.get("/download-video-" + file_name)
     open(link[1] + ".mp3", "wb") { |file|
        file.write(resp.body)
     }
    }  
 end 

 puts "\n Yay!!"

And this is the exception:

/Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:140:in `rescue in rbuf_fill': Timeout::Error (Timeout::Error)
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:134:in `rbuf_fill'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:116:in `readuntil'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/protocol.rb:126:in `readline'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:2138:in `read_status_line'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:2127:in `read_new'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:1120:in `transport_request'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:1106:in `request'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:312:in `block in open_http'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/net/http.rb:564:in `start'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:306:in `open_http'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:767:in `buffer_open'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:203:in `block in open_loop'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:201:in `catch'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:201:in `open_loop'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:146:in `open_uri'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:669:in `open'
 from /Users/test/.rvm/rubies/ruby-1.9.2-preview1/lib/ruby/1.9.1/open-uri.rb:33:in `open'
 from test.rb:38:in `block in <main>'
 from test.rb:37:in `each'
 from test.rb:37:in `<main>'

I'd also appreciate your comments on the rest of the code.

Answer 1

Your timeout isn't in the code you set the timeout for. It's here, where you use open-uri:

open("http://www.tubeminator.com/ajax.php?function=downloadvideo&url=http%3A%2F%2Fwww.vimeo.com%2F" + link[0],

You can set a read timeout for open-uri like so:

#!/usr/bin/ruby1.9

require 'open-uri'

open('http://stackoverflow.com', 'r', :read_timeout=>0.01) do |http|
  http.read
end

# => /usr/lib/ruby/1.9.0/net/protocol.rb:135:in `sysread': \
# => execution expired (Timeout::Error)
# => ...
# =>         from /tmp/foo.rb:5:in `<main>'

:read_timeout is new for Ruby 1.9 (it's not in Ruby 1.8). 0 or nil means "no timeout."

Answer 2

For Ruby 1.8 I used this to solve my time-out issues. Extending the Net::HTTP class in my code and re-initialized with default parameters including an initialization of my own read_timeout should keep things sane I think.

require 'net/http'

# Lengthen timeout in Net::HTTP
module Net
    class HTTP
        alias old_initialize initialize

        def initialize(*args)
            old_initialize(*args)
            @read_timeout = 5*60     # 5 minutes
        end
    end
end