Module: N::Render

Included in:
Context, Controller
Defined in:
lib/nitro/render.rb

Overview

The rendering mixin.

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#context ⇒ Object Also known as: ctx

The context.



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# File 'lib/nitro/render.rb', line 178

def context
  @context
end

#out ⇒ Object

The outbut buffer. The output of a script/action is accumulated in this buffer.



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# File 'lib/nitro/render.rb', line 174

def out
  @out
end

#rendering_errors ⇒ Object

An array holding the rendering errors for this request.



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# File 'lib/nitro/render.rb', line 189

def rendering_errors
  @rendering_errors
end

#request ⇒ Object

Alias for context.



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# File 'lib/nitro/render.rb', line 184

def request
  @request
end

Instance Method Details

#initialize(context, base) ⇒ Object

Initialize the render.

context

A parent render/controller acts as the context.



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# File 'lib/nitro/render.rb', line 196

def initialize(context, base)
	@request = @context = context
	@out = context.out
	@base = base
end

#log_error(str) ⇒ Object

Log a rendering error.



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# File 'lib/nitro/render.rb', line 254

def log_error(str)
	@rendering_errors ||= []
	@rendering_errors << str

	# gmosx: Hmm perhaps this should not be logged 
	# to avoid DOS attacks.

	Logger.error str
end

#redirect(url, status = 303) ⇒ Object

Send a redirect response.

Raises:



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# File 'lib/nitro/render.rb', line 238

def redirect(url, status = 303)
	@context.status = status
	@context.out = "<html><a href=\"#{url.to_s}\">#{url.to_s}</a>.</html>\n"
	@context.response_headers['location'] = url.to_s

	raise RenderExit
end

#redirect_referer(postfix = nil, status = 303) ⇒ Object

Redirect to the referer of this method.



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# File 'lib/nitro/render.rb', line 248

def redirect_referer(postfix = nil, status = 303)
	redirect("#{@context.referer}#{postfix}", status)
end

#render(path) ⇒ Object

Renders the action denoted by path. The path is resolved by the dispatcher to get the correct controller.



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# File 'lib/nitro/render.rb', line 206

def render(path)
	Logger.debug "Rendering '#{path}'." if $DBG
	
	klass, action, base, ctype = @context.dispatcher.dispatch(path, @context)

	@context.content_type = ctype

	raise 'No controller for action' unless klass
	
	if self.class == klass 
		self.send(action)
	else
		klass.new(self, base).send(action)
	end

rescue RenderExit => e

	# Just stop rendering.
	# For example called by redirects.
	
rescue Exception, StandardError => e
	log_error "Error while handling '#{path}'."
	log_error pp_exception(e)
	
	# More fault tolerant, only flags the erroneous box with 
	# error not the full page.
	
	@out << '(error)'
end

#session ⇒ Object

Convenience method to lookup the session.



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# File 'lib/nitro/render.rb', line 266

def session
	@context.session
end