Class: Rufus::Sixjo::Context

Inherits:
Object
  • Object
show all
Includes:
Erb
Defined in:
lib/rufus/sixjo.rb

Overview

The context in which an HTTP request is handled

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Methods included from Erb

#erb

Constructor Details

#initialize(app, env) ⇒ Context

Returns a new instance of Context.



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# File 'lib/rufus/sixjo.rb', line 227

def initialize (app, env)

  @application = app
  @request = env.delete('_rack_request') || Rack::Request.new(env)
  @response = Rack::Response.new

  @params = @request.params.merge(@request.env['_ROUTE_PARAMS'])
  @params = @params.inject({}) { |r, (k, v)| r[k.to_sym] = v; r }
end

Instance Attribute Details

#application ⇒ Object (readonly)

Returns the value of attribute application.



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# File 'lib/rufus/sixjo.rb', line 224

def application
  @application
end

#request ⇒ Object (readonly)

Returns the value of attribute request.



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# File 'lib/rufus/sixjo.rb', line 225

def request
  @request
end

#response ⇒ Object (readonly)

Returns the value of attribute response.



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# File 'lib/rufus/sixjo.rb', line 225

def response
  @response
end

Class Method Details

.service(app, block, helpers, env) ⇒ Object 



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# File 'lib/rufus/sixjo.rb', line 237

def self.service (app, block, helpers, env)

  r = self.new(app, env)

  helpers.each { |h| r.instance_eval &h }

  r.metaclass.instance_eval { define_method :call, &block }

  begin

    caught = catch :done do
      r.response.body = r.call || []
      nil
    end

    if caught
      caught = Array(caught)
      r.response.status = caught[0]
      r.response.body = caught[1]
    end

  rescue Exception => e

    r.response.status = 500
    r.response.content_type = 'text/plain'
    r.response.body = e.to_s + "\n" + e.backtrace.join("\n")
  end

  r.response.finish
end

Instance Method Details

#h(text) ⇒ Object 



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# File 'lib/rufus/sixjo.rb', line 272

def h (text)
  Rack::Utils.escape_html(text)
end

#metaclass ⇒ Object 



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# File 'lib/rufus/sixjo.rb', line 218

def metaclass
  class << self
    self
  end
end

#params ⇒ Object 



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# File 'lib/rufus/sixjo.rb', line 268

def params
  @params
end

#redirect(path, status = 303, body = nil) ⇒ Object 



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# File 'lib/rufus/sixjo.rb', line 276

def redirect (path, status=303, body=nil)
  @response.status = status
  @response.location = path
  @response.body = body || "#{status} redirecting to #{path}"
  throw :done
end

#set_etag(t, weak = false) ⇒ Object

throws 304 as needed



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# File 'lib/rufus/sixjo.rb', line 286

def set_etag (t, weak=false)

  t = '"%s"' % t
  t = weak ? "W/#{t}" : t

  @response.header['ETag'] = t

  etags = @request.etags

  if etags.include?(t) or etags.include?('*')
    throw(:done, 304) if @request.get? or @request.head?
    throw(:done, 412) # precondition failed
  end
end

#set_last_modified(t) ⇒ Object

throws 304 as needed



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# File 'lib/rufus/sixjo.rb', line 304

def set_last_modified (t)

  t = Time.local(*t.to_a) # flatten milliseconds

  @response.header['Last-Modified'] = t.httpdate

  sin = @request.env['HTTP_IF_MODIFIED_SINCE']

  return unless sin

  # taken from the "Ruby Cookbook" by
  # Lucas Carlson and Leonard Richardson
  #
  sin = DateTime.parse(sin)
  sin = sin.new_offset(DateTime.now.offset - sin.offset)
  sin = Time.local(
    sin.year, sin.month, sin.day, sin.hour, sin.min, sin.sec, 0)

  if sin >= t
    throw(:done, 304) if @request.get? or @request.head?
    throw(:done, 412) # precondition failed
  end
end