From: Brian Candler <b.candler@...>
Date: 2009-03-08T05:26:30+09:00
Subject: Re: CGI newbie

Thanks Listening wrote:
>>> I'm going to say Sinatra and Ruby 1.9.1 are probably what you want.
>> 
>> I second that. The HTML form processing is already included.
> 
> Since this was a newbie question about writing CGI apps with ruby: If 
> I'm not mistaken Sinatra is supposed to work as CGI script via rack -- 
> at least that's what the blurb says. Does anyone happen to know a 
> Sinatra newbie + rack for CGI tutorial? The last time I tried I didn't 
> get the impression this was something anyone has ever tried to do 
> before. Is it possible? Is it useful?

I tried it. It works, but:

- you need the most recent Sinatra (0.9.1)

- you need rack HEAD from git

- you need to add
    set :server,"cgi"
  since CGI isn't (yet) autodetected

- you need to beware that your links are relative to your CGI, so 
instead of

    %form{:action=>"/update", ...}
you need
    %form{:action=>"/cgi-bin/first-sinatra.rb/update", ...}

This is where having a link helper method which prepends 
env["SCRIPT_NAME"] is useful.

- startup time can be improved by removing 'require "rubygems"' and 
explicitly adding paths:

$:.unshift "/path/to/sinatra/lib"
$:.unshift "/path/to/rack/lib"
$:.unshift "/path/to/haml/lib"
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