From: Eric Hodel <drbrain@...7.net>
Date: 2003-10-22T13:25:09-07:00
Subject: Re: Webrick for IOWA?


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Kirk Haines (khaines@enigo.com) wrote:

> IOWA's basic architecture has the IOWA application running as a standalone
> process.  When the webserver receives a request that is to be handled by
> the IOWA application, a connection is made to the IOWA process via either
> a CGI program or (currently) a mod_ruby handler.  The request is
> encapsulated in a serialized object that looks and acts a lot like an
> Apache::Request.  The IOWA app does its thing, and returns back to its
> caller (the cgi program or mod_ruby handler) the Apache::Request with http
> headers and content, ready to push on back out to the browser.

> Since webrick is now a standard component of Ruby, what I am wondering,
> really, is exactly what webrick provides?  Would it be
> worthwhile/practical for me to look at changing IOWA so that webrick
> provides the framework for the communications conduit?

Webrick provides servlet stubs and everything else, so it would be
practical, probably trivial, to port IOWA to it.

Here's what I use for Borges, all the work happens in do_GET/do_POST,
and the majority of that work is simply mapping WEBrick Request/Response
to a Borges request/response.  (With a little work, I may be able
to use a webrick request/response inside Borges, I haven't looked
into it yet.)

require 'webrick'

class BorgesServer < WEBrick::HTTPServlet::AbstractServlet

  attr_accessor :handler=20

  def initialize(server, options =3D {})
    super @handler =3D options[:Handler] || WADispatcher.default
  end

  ##
  # WEBrick HTTP GET handler=20

  def do_GET(req, res)
    request =3D WARequest.new(req.path, req.header, req.query, req.cookies)
    response =3D @handler.handle_request(request)

    res.status =3D response.status
    res.body =3D response.contents

    response.headers.each do |k,v|
      res[k] =3D v=20
    end
  end

  ##
  # WEBrick HTTP POST handler (same as GET)

  alias do_POST do_GET

  ##
  # Create a new Borges Server=20

  def self.create(options)
    options[:BindAddress] ||=3D '0.0.0.0'
    options[:Listen] ||=3D [['::', 7000]]
    options[:Port] ||=3D 7000

    server =3D WEBrick::HTTPServer.new(options)
    server.mount("/borges", BorgesServer, options)

    return server=20
  end

  ##
  # Start a new BorgesServer with a SIGINT handler=20

  def self.start(options =3D {})
    server =3D self.create(options)
    trap("INT") do server.shutdown end
    server.start

    return server=20
  end

end

--=20
Eric Hodel - drbrain@segment7.net - http://segment7.net
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