Module: Sinatra::RespondTo

Defined in:
lib/sinatra/respond_to.rb,
lib/sinatra/respond_to/version.rb

Defined Under Namespace

Modules: Helpers Classes: MissingTemplate, UnhandledFormat

Constant Summary collapse

Version = 
'0.9.0'

Class Method Summary collapse

Class Method Details

.registered(app) ⇒ Object 



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# File 'lib/sinatra/respond_to.rb', line 10

def self.registered(app)
  app.helpers RespondTo::Helpers

  app.set :default_content, :html
  app.set :assume_xhr_is_js, true

  # We remove the trailing extension so routes
  # don't have to be of the style
  #
  #   get '/resouce.:format'
  #
  # They can instead be of the style
  #
  #   get '/resource'
  #
  # and the format will automatically be available in <tt>format</tt>
  app.before do
    # Let through sinatra image urls in development
    next if self.class.development? && request.path_info =~ %r{/__sinatra__/.*?.png}

    unless settings.static? && settings.public_folder? && (request.get? || request.head?) && static_file?(request.path_info)
      if request.params.has_key? 'format'
        format params['format']

        # Rewrite the accept header with the determined format to allow
        # downstream middleware to make use the the mime type
        env['HTTP_ACCEPT'] = ::Sinatra::Base.mime_type(format)
        request.accept.replace [env['HTTP_ACCEPT']]
      else
        # Consider first Accept type as default, otherwise
        # fall back to settings.default_content
        default_content = Rack::Mime::MIME_TYPES.invert[request.accept.first]
        default_content = default_content ? default_content[1..-1] : settings.default_content
        
        # Special case, as the specified default_content may use a different symbol than that
        # found through lookup based on Content-Type
        default_content = settings.default_content if
          default_content != settings.default_content &&
          ::Sinatra::Base.mime_type(default_content) == ::Sinatra::Base.mime_type(settings.default_content)

        ext = $1 if request.path_info.match(%r{\.([^\./]+)$})
        if ext
          # Sinatra relies on a side-effect from path_info= to determine
          # its routes. A direct string change (e.g., sub!) would bypass
          # that and fail to have the effect we're looking for.
          request.path_info = request.path_info[0..-(ext.length+2)]

          format ext

          # Rewrite the accept header with the determined format to allow
          # downstream middleware to make use the the mime type
          env['HTTP_ACCEPT'] = ::Sinatra::Base.mime_type(format)
          request.accept.replace [env['HTTP_ACCEPT']]
        else
          format(request.xhr? && settings.assume_xhr_is_js? ? :js : default_content)
        end
      end
    end
  end

  app.configure :development do |dev|
    dev.error UnhandledFormat do
      content_type :html, :charset => 'utf-8'

      (<<-HTML).gsub(/^ {10}/, '')
      <!DOCTYPE html>
      <html>
      <head>
        <style type="text/css">
        body { text-align:center;font-family:helvetica,arial;font-size:22px;
          color:#888;margin:20px}
        #c {margin:0 auto;width:500px;text-align:left}
        </style>
      </head>
      <body>
        <h2>Sinatra doesn't know this ditty.</h2>
        <img src='/__sinatra__/404.png'>
        <div id="c">
          Try this:
          <pre>#{request.request_method.downcase} '#{request.path_info}' do\n  respond_to do |wants|\n    wants.#{format} { "Hello World" }\n  end\nend</pre>
        </div>
      </body>
      </html>
      HTML
    end

    dev.error MissingTemplate do
      content_type :html, :charset => 'utf-8'
      response.status = 500

      engine = request.env['sinatra.error'].message.split('.').last
      engine = 'haml' unless ['haml', 'builder', 'erb'].include? engine

      path = File.basename(request.path_info)
      path = "root" if path.nil? || path.empty?

      format = engine == 'builder' ? 'xml' : 'html'

      layout = case engine
               when 'haml' then "!!!\n%html\n  %body= yield"
               when 'erb' then "<html>\n  <body>\n    <%= yield %>\n  </body>\n</html>"
               when 'builder' then "xml << yield"
               end

      layout = "<small>app.#{format}.#{engine}</small>\n<pre>#{escape_html(layout)}</pre>"

      (<<-HTML).gsub(/^ {10}/, '')
      <!DOCTYPE html>
      <html>
      <head>
        <style type="text/css">
        body { text-align:center;font-family:helvetica,arial;font-size:22px;
          color:#888;margin:20px}
        #c {margin:0 auto;width:500px;text-align:left;}
        small {float:right;clear:both;}
        pre {clear:both;}
        </style>
      </head>
      <body>
        <h2>Sinatra can't find #{request.env['sinatra.error'].message}</h2>
        <img src='/__sinatra__/500.png'>
        <div id="c">
          Try this:<br />
          #{layout}
          <small>#{path}.#{format}.#{engine}</small>
          <pre>Hello World!</pre>
          <small>application.rb</small>
          <pre>#{request.request_method.downcase} '#{request.path_info}' do\n  respond_to do |wants|\n    wants.#{engine == 'builder' ? 'xml' : 'html'} { #{engine} :#{path}#{",\n#{' '*32}layout => :app" if layout} }\n  end\nend</pre>
        </div>
      </body>
      </html>
      HTML
    end
  end
end