havenwood/stream_closing.rb

## stream_closing.rb
# frozen_string_literal: true

require 'trenni/template'

##
# Streaming template
TEMPLATE = Trenni::Template.load(<<~'HTML')
  <!DOCTYPE html>
  <html lang="en">
    <head>
      <title><?r Model::TITLE ?></title>
      <style>
        table {
          border-collapse: collapse;
          box-shadow: 0 0 20px Gainsboro;
          font-family: system-ui;
        }
        table tr:nth-of-type(even) {
          background-color: AliceBlue;
        }
        table td {
          padding: 1rem;
        }
      </style>
    </head>
    <body>
      <table>
      <?r Model.rows.each do |row| ?>
        <tr>
        <?r row.each do |column| ?>
          <?r sleep 1 ?>
          <td>#{column}</td>
        <?r end ?>
        </tr>
      <?r end ?>
      </table>
    </body>
  </html>
HTML

##
# Data for the template
module Model
  TITLE = 'Table of Numbers'

  def self.rows = Array.new(3) { Array.new(4) { rand 10..99 } }
end

##
# 404 page
NOT_FOUND_HTML = <<~'HTML'
  <!DOCTYPE html>
  <html lang="en">
    <head><title>Not Found</title></head>
    <body><h1>Not Found</h1></body>
  </html>
HTML

##
# Rack app
HEADERS = {'content-type' => 'text/html'}.freeze
BODY_NOT_FOUND = [NOT_FOUND_HTML].freeze

##
# With Falcon, this closes the stream. With Puma, it doesn't.
BODY = TEMPLATE.to_proc

##
# With Puma, this closes the stream. With Falcon, `stream` is an Integer.
BODY = TEMPLATE.to_proc >> ->(stream) { stream.close }

run do |env|
  case env.transform_keys { _1.to_sym.downcase }
  in {path_info: '/', request_method: 'GET' | 'HEAD'}
    [200, HEADERS.dup, BODY]
  else
    [404, HEADERS.dup, BODY_NOT_FOUND]
  end
end
	# frozen_string_literal: true

	require 'trenni/template'

	##
	# Streaming template
	TEMPLATE = Trenni::Template.load(<<~'HTML')
	<!DOCTYPE html>
	<html lang="en">
	<head>
	<title><?r Model::TITLE ?></title>
	<style>
	table {
	border-collapse: collapse;
	box-shadow: 0 0 20px Gainsboro;
	font-family: system-ui;
	}
	table tr:nth-of-type(even) {
	background-color: AliceBlue;
	}
	table td {
	padding: 1rem;
	}
	</style>
	</head>
	<body>
	<table>
	<?r Model.rows.each do \|row\| ?>
	<tr>
	<?r row.each do \|column\| ?>
	<?r sleep 1 ?>
	<td>#{column}</td>
	<?r end ?>
	</tr>
	<?r end ?>
	</table>
	</body>
	</html>
	HTML

	##
	# Data for the template
	module Model
	TITLE = 'Table of Numbers'

	def self.rows = Array.new(3) { Array.new(4) { rand 10..99 } }
	end

	##
	# 404 page
	NOT_FOUND_HTML = <<~'HTML'
	<!DOCTYPE html>
	<html lang="en">
	<head><title>Not Found</title></head>
	<body><h1>Not Found</h1></body>
	</html>
	HTML

	##
	# Rack app
	HEADERS = {'content-type' => 'text/html'}.freeze
	BODY_NOT_FOUND = [NOT_FOUND_HTML].freeze

	##
	# With Falcon, this closes the stream. With Puma, it doesn't.
	BODY = TEMPLATE.to_proc

	##
	# With Puma, this closes the stream. With Falcon, `stream` is an Integer.
	BODY = TEMPLATE.to_proc >> ->(stream) { stream.close }

	run do \|env\|
	case env.transform_keys { _1.to_sym.downcase }
	in {path_info: '/', request_method: 'GET' \| 'HEAD'}
	[200, HEADERS.dup, BODY]
	else
	[404, HEADERS.dup, BODY_NOT_FOUND]
	end
	end