It was a pleasant surprise, then, to discover that Ryan Bigg had posted Ubuntu, Ruby, RVM, Rails and You on Christmas Day. Tip: If you're still on 1.8, check out The Ruby 1.9 Walkthrough, a mega screencast aimed at Ruby 1.8.7 developers who want to learn all about what's new, what's gone, and what's different in Ruby 1.9.2 and 1.9.3.Ī few days ago I needed to produce a screencast on installing Ruby 1.9.2 on Ubuntu 10.10 for students in my forthcoming Ruby class to use. Back in 2009, I wrote a guide to installing a Ruby 1.8 stack on Ubuntu 8.10 so it was only a matter of time before I had to tackle 10.10 (Maverick Meerkat) and Ruby 1.9. It was used for 84% of the 2010 Rails Rumble projects, for example. Let's download the same image using Down.For better or worse, Ubuntu has become one of the most popular Linux variants on which to deploy Ruby and Rails apps. It allows you to avoid these issues to safely and efficiently download files. To solve all of this, Janko created the Down gem. doesn't let you limit redirects or file size.sometimes returns a Tempfile other times StringIO.leaves you vulnerable to remote code execution.Janko Marohnić discovered a bunch of these issues while working on Shrine. It also turns out that open-uri has some other quirks.

First up, the above code is not very memory efficient, it loads the entire image into memory and then writes to disk. The thing is, using open-uri like this is not ideal. Plus, there's a bunch of other potential issues with using open-uri. In practice you would want to handle potential errors, such as a 404 error for a missing image. This is a success, but this was a straightforward example. In the directory in which you opened IRB you will now find the image you downloaded.

Download ruby rails