Class: Volt::HttpResponseRenderer

Inherits:
Object
  • Object
show all
Defined in:
lib/volt/server/rack/http_response_renderer.rb

Overview

Renders responses for HttpController actions

Class Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Class Attribute Details

.renderers ⇒ Object (readonly)

Returns the value of attribute renderers.



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# File 'lib/volt/server/rack/http_response_renderer.rb', line 10

def renderers
  @renderers
end

Class Method Details

.register_renderer(name, content_type, proc) ⇒ Object

Register renderers.



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# File 'lib/volt/server/rack/http_response_renderer.rb', line 14

def self.register_renderer(name, content_type, proc)
  @renderers[name.to_sym] = { proc: proc, content_type: content_type }
end

Instance Method Details

#render(content) ⇒ Object

Iterate through @renderes to find a matching renderer for the given content and call the given proc. Other params from the content are returned as additional headers Returns an empty string if no renderer could be found



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# File 'lib/volt/server/rack/http_response_renderer.rb', line 26

def render(content)
  content = content.symbolize_keys
  self.class.renderers.keys.each do |renderer_name|
    if content.key?(renderer_name)
      renderer = self.class.renderers[renderer_name]
      to_render = content.delete(renderer_name)
      rendered = renderer[:proc].call(to_render)

      # Unwrap a promise if we got one back
      if rendered.is_a?(Promise)
        rendered = rendered.sync
      end

      return [rendered, content.merge(content_type: renderer[:content_type])]
    end
  end

  # If we couldn't find a renderer - just render an empty string
  ["Error: render only supports #{self.class.renderers.keys.join(', ')}", content_type: 'text/plain']
end