Class: RackRscript

Inherits:
Object
  • Object
show all
Includes:
AppRoutes
Defined in:
lib/rack-rscript.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(raw_opts = {}) ⇒ RackRscript

Returns a new instance of RackRscript.



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# File 'lib/rack-rscript.rb', line 27

def initialize(raw_opts={})
  @params = {}
  @templates = {}
  
  @rrscript = RScript.new
  
  opts = {logfile: '', logrotate: 'daily', pkg_src: '', sps_port: 59000}\
    .merge(raw_opts)
  @url_base = opts[:pkg_src] # web server serving the RSF files
  @url_base += '/' unless @url_base[-1] == '/'
  
  @log = false

  if opts[:logfile].length > 0 then
    @log = true
    @logger = Logger.new(opts[:logfile], opts[:logrotate])    
  end

  super() # required for app-routes initialize method to exectue
  default_routes(@env, @params)

  if opts[:sps_address] then

    c = WebSocket::EventMachine::Client

    Thread.new do   

      EM.run do

        @ws = c.connect(uri: "ws://%s:%s" % [opts[:sps_address], opts[:sps_port]])

        @ws.onopen do
          puts "Client connected"          
        end

        @ws.onclose do
          puts "Client disconnected"
        end

        EventMachine.error_handler{ |e|
          puts "Error raised during event loop: #{e.message}"
        
        }
    
      end
     
    end
  end  
end

Instance Attribute Details

#ws ⇒ Object (readonly)

Returns the value of attribute ws.



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# File 'lib/rack-rscript.rb', line 25

def ws
  @ws
end

Instance Method Details

#call(env) ⇒ Object 



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# File 'lib/rack-rscript.rb', line 77

def call(env)
  @env = env
  request = env['REQUEST_URI'][/https?:\/\/[^\/]+(.*)/,1]

  log "_: " + env.keys.inspect
  log Time.now.to_s + "_: " + env.inspect
  req = Rack::Request.new(env)

  @req_params = req.params
  default_routes(env,@params)
  content, content_type, status_code = run_route(request, env['REQUEST_METHOD'])

  if content.is_a? Redirect then
    redirectx = content
    res = Rack::Response.new
    res.redirect(redirectx.to_url)
    res.finish      
  else

    e = $!

    if e then
      content, status_code = e, 500
      log(e)      
    elsif content.nil? then
      content, status_code  = "404: page not found", 404             
    end      

    tilt_proc = lambda do |s, content_type| 
      type = content_type[/[^\/]+$/]
      s = [s,{}] unless s.is_a? Array
      content, options = s
      [Tilt[type].new() {|x| content}.render(self, options), 'text/html']
    end
    
    passthru_proc = lambda{|c, ct| [c,ct]}
    
    ct_list = {
      'text/html' => passthru_proc,
      'text/haml' => tilt_proc,
      'text/slim' => tilt_proc,
      'text/plain' => passthru_proc,
      'text/xml' => passthru_proc,
      'application/xml' => passthru_proc,
      'image/png' => passthru_proc,
      'image/jpeg' => passthru_proc
    }
    content_type ||= 'text/html'
    status_code ||= 200                  
    proc = ct_list[content_type]
    proc ||= passthru_proc
    content, content_type = proc.call(content, content_type)      
    
    [status_code, {"Content-Type" => content_type}, [content]]
  end
end

#clear_cache ⇒ Object 



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# File 'lib/rack-rscript.rb', line 134

def clear_cache()
  @rrscript.reset
end

#haml(name, options = {}) ⇒ Object 



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# File 'lib/rack-rscript.rb', line 182

def haml(name,options={})    
  render name, :haml, options
end

#log(msg) ⇒ Object 



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# File 'lib/rack-rscript.rb', line 172

def log(msg)
  if @log == true then
    @logger.debug msg
  end
end

#redirect(url) ⇒ Object 



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# File 'lib/rack-rscript.rb', line 178

def redirect(url)
  Redirect.new url
end

#run_job(url, jobs, params = {}, *qargs) ⇒ Object 



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# File 'lib/rack-rscript.rb', line 138

def run_job(url, jobs, params={}, *qargs)

  if @params[:splat] then
    @params.each do  |k,v|
      @params.delete k unless k == :splat or k == :package or k == :job or k == :captures
    end
  end  
  
  if @params[:splat] and @params[:splat].length > 0 then
    h = @params[:splat].first[1..-1].split('&').inject({}) do |r,x| 
      k, v = x.split('=')
      v ? r.merge(k[/\w+$/].to_sym => Rack::Utils.unescape(v)) : r
    end
    @params.merge! h
  end
  
  @params.merge! @req_params
  result, args = @rrscript.read([url, jobs.split(/\s/), \
    qargs].flatten)

  rws = self
  
  begin
    r = eval result
    return r

  rescue Exception => e  
    @params = {}
    err_label = e.message.to_s + " :: \n" + e.backtrace.join("\n")      
    log(err_label)
  end
  
end

#slim(name, options = {}) ⇒ Object 



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# File 'lib/rack-rscript.rb', line 186

def slim(name,options={})
  render name, :slim, options
end