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require File.expand_path(File.dirname(__FILE__) + "/library")
require 'cgi'

app = lambda do |env|
  case env['PATH_INFO']
  when '/'
    params = CGI.parse(env['QUERY_STRING'])
    if params['sleep_seconds'].first
      sleep params['sleep_seconds'].first.to_f
    end

    if File.exist?("front_page.txt")
      text_response(File.read("front_page.txt"))
    else
      text_response("front page")
    end
  when '/parameters'
    req = Rack::Request.new(env)
    method = env["REQUEST_METHOD"]
    first = req.params["first"]
    second = req.params["second"]
    text_response("Method: #{method}\nFirst: #{first}\nSecond: #{second}\n")
  when '/chunked'
    chunks = ["7\r\nchunk1\n\r\n", "7\r\nchunk2\n\r\n", "7\r\nchunk3\n\r\n", "0\r\n\r\n"]
    [200, { "Content-Type" => "text/html", "Transfer-Encoding" => "chunked" }, chunks]
  when '/pid'
    text_response(Process.pid)
  when /^\/env/
    body = ''
    env.sort.each do |key, value|
      body << "#{key} = #{value}\n"
    end
    text_response(body)
  when '/system_env'
    body = ''
    ENV.sort.each do |key, value|
      body << "#{key} = #{value}\n"
    end
    text_response(body)
  when '/touch_file'
    req = Rack::Request.new(env)
    filename = req.params["file"]
    File.open(filename, "w").close
    text_response("ok")
  when '/extra_header'
    [200, { "Content-Type" => "text/html", "X-Foo" => "Bar" }, ["ok"]]
  when '/cached'
    text_response("This is the uncached version of /cached")
  when '/upload_with_params'
    req = Rack::Request.new(env)
    name1 = binary_string(req.params["name1"])
    name2 = binary_string(req.params["name2"])
    file = req.params["data"][:tempfile]
    file.binmode
    text_response(
      "name 1 = #{name1}\n" <<
      "name 2 = #{name2}\n" <<
      "data = #{file.read}")
  when '/raw_upload_to_file'
    File.open(env['HTTP_X_OUTPUT'], 'w') do |f|
      while line = env['rack.input'].gets
        f.write(line)
        f.flush
      end
    end
    text_response("ok")
  when '/print_stderr'
    STDERR.puts "hello world!"
    text_response("ok")
  when '/print_stdout_and_stderr'
    STDOUT.puts "hello stdout!"
    sleep 0.1  # Give Passenger core some time to process stdout first.
    STDERR.puts "hello stderr!"
    text_response("ok")
  when '/switch_protocol'
    if env['HTTP_UPGRADE'] != 'raw' || env['HTTP_CONNECTION'].downcase != 'upgrade'
      return [500, { "Content-Type" => "text/plain" }, ["Invalid headers"]]
    end
    env['rack.hijack'].call
    io = env['rack.hijack_io']
    begin
      io.write("Status: 101 Switching Protocols\r\n")
      io.write("Upgrade: raw\r\n")
      io.write("Connection: Upgrade\r\n")
      io.write("\r\n")
      while !io.eof?
        line = io.readline
        io.write("Echo: #{line}")
        io.flush
      end
    ensure
      io.close
    end
  else
    [404, { "Content-Type" => "text/plain" }, ["Unknown URI"]]
  end
end

run app