Class: SC::Rack::Service

Inherits:
Object
  • Object
show all
Defined in:
lib/sproutcore/rack/service.rb

Overview

Configures a standard set of Rack adaptors for serving SproutCore apps. Based on your config settings, this will configure appropriate middlewear apps for each incoming project. Requests are then cascaded through the projects to find one that can service the request.

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(*projects) ⇒ Service

Returns a new instance of Service.



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# File 'lib/sproutcore/rack/service.rb', line 90

def initialize(*projects)
  @projects = projects.flatten

  # Get apps for each project & cascade if needed
  @apps = @projects.map { |project| middleware_for(project) }
  @app = @apps.size == 1 ? @apps.first : ::Rack::Cascade.new(@apps)

  # Now put it behind some useful general optimizers...
  @app = ::Rack::Recursive.new(@app)
  @app = ::Rack::ConditionalGet.new(@app)
  #@app = ::Rack::Deflater.new(@app)
  
end

Class Method Details

.start(opts = {}) ⇒ Object

Convenience method to start the rack service as a server. You must pass at least a :project => foo, or :projects => [foo, bar] option to this method, but you may also pass a number of other config optios including:

Options

:host:: the hostname to listen on (default 0.0.0.0) :port:: the portname to listen on (default 4020) :daemonize:: if true, service will be run as daemon :pid:: if daemonizing, this is the path of the file to write pid to



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# File 'lib/sproutcore/rack/service.rb', line 29

def self.start(opts = {})
  
  # load rack
  begin
    require 'rack'
  rescue LoadError => e
    gem 'rack'
    require 'rack'
  end
  
  # Guess.
  if ENV.include?("PHP_FCGI_CHILDREN")
    server = ::Rack::Handler::FastCGI

    # We already speak FastCGI
    options.delete :File
    options.delete :Port
  elsif ENV.include?("REQUEST_METHOD")
    server = ::Rack::Handler::CGI
  else
    begin
      server = ::Rack::Handler::Mongrel
    rescue LoadError => e
      server = ::Rack::Handler::WEBrick
    end
  end

  projects = opts.delete(:projects) || [opts.delete(:project)].compact
  app = self.new(*projects)
  
  opts[:Host] ||= opts[:host] # allow either case.
  opts[:Port] ||= opts[:port] || '4020'
  
  # If daemonize is set, do it...
  if opts[:daemonize]
    SC.logger.info "Daemonizing..."
    pid = opts[:pid]
    
    if RUBY_VERSION < "1.9"
      return if fork
      Process.setsid
      return if fork
      Dir.chdir "/"
      File.umask 0000
      STDIN.reopen "/dev/null"
      STDOUT.reopen "/dev/null", "a"
      STDERR.reopen "/dev/null", "a"
    else
      Process.daemon
    end

    if pid
      File.open(pid, 'w'){ |f| f.write("#{Process.pid}") }
      at_exit { File.delete(pid) if File.exist?(pid) }
    end
  end
  
  SC.logger << "Starting server at http://#{opts[:Host] || '0.0.0.0'}:#{opts[:Port]} in #{SC.build_mode} mode\n"
  server.run app, opts
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/sproutcore/rack/service.rb', line 104

def call(env); @app.call(env); end

#middleware_for(project) ⇒ Object

Construct new middleware for the named project



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# File 'lib/sproutcore/rack/service.rb', line 107

def middleware_for(project)
  apps = []

  # setup some conditional items...
  config = project.config
  #if config.serve_test_runner || config.serve_docs
    apps << SC::Rack::Dev.new(project) 
  #end
  if project.buildfile.proxies.size > 0
    apps << SC::Rack::Proxy.new(project) 
  end

  # Add builder for the project itself
  apps  << SC::Rack::Builder.new(project)
  
  # serve files out of the public directory if serve_public is 
  # configures && the public directory exists
  if config.serve_public
    pubdir = File.join(project.project_root, 'public')
    apps  << ::Rack::File.new(pubdir) if File.directory?(pubdir)
  end
  
  # Wrap'em in a cascade if needed.  This will return the first
  # app that does not return nil
  app = apps.size == 1 ? apps.first : ::Rack::Cascade.new(apps) 
  
  # Add show exceptions handler if enabled
  app = ::Rack::ShowExceptions.new(app) if config.serve_exceptions
  
  return app # done!
end