Class: Grape::Middleware::Formatter

Inherits:
Base
  • Object
show all
Includes:
Formats
Defined in:
lib/grape/middleware/formatter.rb

Instance Attribute Summary

Attributes inherited from Base

#app, #env, #options

Instance Method Summary collapse

Methods inherited from Base

#call, #call!, #initialize, #request, #response

Constructor Details

This class inherits a constructor from Grape::Middleware::Base

Instance Method Details

#after ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 82

def after
  status, headers, bodies = *@app_response
  formatter = formatter_for env['api.format']
  bodymap = bodies.collect do |body|
    formatter.call(body)
  end
  headers['Content-Type'] = content_types[env['api.format']] unless headers['Content-Type']
  Rack::Response.new(bodymap, status, headers).to_a
end

#before ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 21

def before
  fmt = format_from_extension || options[:format] || format_from_header || options[:default_format]
  if content_types.key?(fmt)
    if !env['rack.input'].nil? and (body = env['rack.input'].read).strip.length != 0
      parser = parser_for fmt
      unless parser.nil?
        begin
          fmt = mime_types[request.media_type] if request.media_type
          if content_type_for(fmt)
            parser = parser_for fmt
            unless parser.nil?
              begin
                body = parser.call body
                env['rack.request.form_hash'] = !env['rack.request.form_hash'].nil? ? env['rack.request.form_hash'].merge(body) : body
                env['rack.request.form_input'] = env['rack.input']
              rescue
                # It's possible that it's just regular POST content -- just back off
              end
            end
          else
            throw :error, :status => 406, :message => 'The requested content-type is not supported.'
          end
        ensure
          env['rack.input'].rewind
        end
      end
      env['rack.input'].rewind
    end
    env['api.format'] = fmt
  else
    throw :error, :status => 406, :message => 'The requested format is not supported.'
  end
end

#default_options ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 8

def default_options
  {
    :default_format => :txt,
    :formatters => {},
    :content_types => {},
    :parsers => {}
  }
end

#format_from_extension ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 55

def format_from_extension
  parts = request.path.split('.')
  extension = parts.last.to_sym

  if parts.size > 1 && content_types.key?(extension)
    return extension
  end
  nil
end

#format_from_header ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 65

def format_from_header
  mime_array.each do |t|
    if mime_types.key?(t)
      return mime_types[t]
    end
  end
  nil
end

#headers ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 17

def headers
  env.dup.inject({}){|h,(k,v)| h[k.to_s.downcase[5..-1]] = v if k.to_s.downcase.start_with?('http_'); h}
end

#mime_array ⇒ Object 



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# File 'lib/grape/middleware/formatter.rb', line 74

def mime_array
  accept = headers['accept'] or return []

  accept.gsub(/\b/,'').scan(%r((\w+/[\w+.-]+)(?:(?:;[^,]*?)?;\s*q=([\d.]+))?)).sort_by { |_, q| -q.to_f }.map {|mime, _|
    mime.sub(%r(vnd\.[^+]+\+), '')
  }
end