Comments on: Canonical URLs with Rack and Heroku

By: Derick Bailey

Derick Bailey — Tue, 27 Sep 2011 03:19:00 +0000

thank you jimmy! just saved me hours of trying to figure this out

Dale Smith — Sat, 25 Sep 2010 22:10:26 +0000

How to resolve problems running Sinatra 1.0 on Ruby 1.9.2 -p0:

I’m running Ruby 1.9.2 on Windows 7. When I tried to run through the Hello World example on the sinatra site, I got the following error:

C:/Ruby192/lib/ruby/gems/1.9.1/gems/sinatra-1.0/lib/sinatra/base.rb:753:in `read’: Invalid argument – (Errno::EINVAL)

Turns out this is a known issue with Sinatra 1.0 and will be fixed in the next release:

but in the meantime, you can edit base.rb in

[ruby 1.9.2 root]\lib\ruby\gems\1.9.1\gems\sinatra-1.0\lib\sinatra

adding the following line to the CALLERS_TO_IGNORE variable:

The link above shows exactly where to add it. I added it to mine, and I’m up and running now.

Vijay Santhanam — Fri, 24 Sep 2010 07:30:13 +0000

Thanks Jimmy, you make Heroku + Ruby + all these libraries sound like a lot of fun.

Any chance you can open source a demo website so we can see how you’ve set stuff up with all the tech and gems.

Bill Beckelman — Fri, 24 Sep 2010 04:04:57 +0000

Thanks Jimmy. This has been on my list to figure out for a few days now. I can’t believe how easy this stuff is with Sinatra and Heroku.