Shouldn't throw exception when preview fetching timeouts

[oddlyfunctional]

@lunks
How to test it:

• Open a IRB or Pry console
• Run the following code

require 'webrick'

server = WEBrick::HTTPServer.new :Port => 8000
server.mount_proc '/' do |req, res|
  sleep 9999
end
server.start

• Try to create a media with the URL "http://localhost:8000"

[lunks]

IMHO it's taking too long. Can we reduce the time net persistent times out?

[lunks]

Also, there are at least one more error that can happen as well: http://bucket.dunnoapp.com/apps/54da0cd06432310009000000/problems/54fec4bf663133000f840000

[oddlyfunctional]

That's funny, the Net::OpenTimeout error is addressed as the cause for the Net::HTTP::Persistent::Error. I'll try to catch it directly.

How many seconds do you think it's appropriate to wait before the timeout? 5?

[oddlyfunctional]

Oops, actually the addressed cause is the Net::ReadTimeout.

[lunks]

There is an ongoing issue about this. It seems it is rescuing this timeout error and it shouldn't, but there is probably somewhere else raising this error as well. We should rescue it. I think 5s is more than enough.

[oddlyfunctional]

There's no way to configure the read timeout for this gem, only the open timeout :/
Should I monkey patch the class or fork the project?

[lunks]

Fork it, add the option, and issue a PR.

[oddlyfunctional]

Done

[lunks]