Sinatra on Rack under Passenger returning 0-byte pages

I'm trying to write a Sinatra app that will run on a sh开发者_如何学JAVAared Passenger server. For now, I'd be happy just getting a "hello world", but something isn't working quite right. I have:

config.ru

require 'vendor/sinatra-lib/sinatra.rb'
set :environment, :production
disable :run

require 'myapp.rb'
run Sinatra::Application

myapp.rb

get '/' do
  "Hello world!"
end

and of course all the support libs I need for sinatra are under /vendor/sinatra-lib. I can rackup this exact load on my local machine, and it runs like a champ. However, on the remote machine, I get 0-byte responses for any URL I try to visit. Note that I have a /public directory, and I can view pages out of that successfully, so I guess Rack is still responding. Also, I can run a basic Rack app without any problems, so Rack must be configured correctly (at least, correctly for running Rack apps).

At this point, the only thing I can think of is to check the version of Rack, etc, on the remote server. I don't have full control over the box, so I don't really have log output to share. I can try to chase it down, if it's important, but I'm hoping something will jump out at somebody.

I think the problem is that the other sinatra files isn't in the load dir. Try to rename vendor/sinatra-lib into vendor/sinatra, and if it still doesn't work, try to add this in the top of your config.ru, in stead of require 'vendor/...'

$: << 'vendor/sinatra'
require 'sinatra'

A little side note: You are not required to pass the file extension (.rb) to require, so you could do require 'myapp' instead of require 'myapp.rb'.

Thank you all for playing, turned out to be a dependency issue -- the server I was deployed to was running a version of Rack that was too old to support Sinatra. Lots of good other stuff to think about, though.