require_relative "helper"

class TestPersistent < Minitest::Test

  HOST = "127.0.0.1"

  def setup
    @valid_request  = "GET / HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\n\r\n"
    @close_request  = "GET / HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\nConnection: close\r\n\r\n"
    @http10_request = "GET / HTTP/1.0\r\nHost: test.com\r\nContent-Type: text/plain\r\n\r\n"
    @keep_request   = "GET / HTTP/1.0\r\nHost: test.com\r\nContent-Type: text/plain\r\nConnection: Keep-Alive\r\n\r\n"

    @valid_post    = "POST / HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\nContent-Length: 5\r\n\r\nhello"
    @valid_no_body  = "GET / HTTP/1.1\r\nHost: test.com\r\nX-Status: 204\r\nContent-Type: text/plain\r\n\r\n"

    @headers = { "X-Header" => "Works" }
    @body = ["Hello"]
    @inputs = []

    @simple = lambda do |env|
      @inputs << env['rack.input']
      status = Integer(env['HTTP_X_STATUS'] || 200)
      [status, @headers, @body]
    end

    opts = {max_threads: 1}
    @server = Puma::Server.new @simple, nil, opts
    @port = (@server.add_tcp_listener HOST, 0).addr[1]
    @server.run
    sleep 0.15 if Puma.jruby?
    @client = TCPSocket.new HOST, @port
  end

  def teardown
    @client.close
    @server.stop(true)
  end

  def lines(count, s=@client)
    str = +''
    Timeout.timeout(5) do
      count.times { str << (s.gets || "") }
    end
    str
  end

  def test_one_with_content_length
    @client << @valid_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)
  end

  def test_two_back_to_back
    @client << @valid_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)

    @client << @valid_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)
  end

  def test_post_then_get
    @client << @valid_post
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)

    @client << @valid_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)
  end

  def test_no_body_then_get
    @client << @valid_no_body
    assert_equal "HTTP/1.1 204 No Content\r\nX-Header: Works\r\n\r\n", lines(3)

    @client << @valid_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)
  end

  def test_chunked
    @body << "Chunked"
    @body = @body.to_enum

    @client << @valid_request

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nHello\r\n7\r\nChunked\r\n0\r\n\r\n", lines(10)
  end

  def test_chunked_with_empty_part
    @body << ""
    @body << "Chunked"
    @body = @body.to_enum

    @client << @valid_request

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nHello\r\n7\r\nChunked\r\n0\r\n\r\n", lines(10)
  end

  def test_no_chunked_in_http10
    @body << "Chunked"
    @body = @body.to_enum

    @client << @http10_request

    assert_equal "HTTP/1.0 200 OK\r\nX-Header: Works\r\n\r\n", lines(3)
    assert_equal "HelloChunked", @client.read
  end

  def test_hex
    str = "This is longer and will be in hex"
    @body << str
    @body = @body.to_enum

    @client << @valid_request

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nHello\r\n#{str.size.to_s(16)}\r\n#{str}\r\n0\r\n\r\n", lines(10)

  end

  def test_client11_close
    @client << @close_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nConnection: close\r\nContent-Length: #{sz}\r\n\r\n", lines(5)
    assert_equal "Hello", @client.read(5)
  end

  def test_client10_close
    @client << @http10_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.0 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)
  end

  def test_one_with_keep_alive_header
    @client << @keep_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.0 200 OK\r\nX-Header: Works\r\nConnection: Keep-Alive\r\nContent-Length: #{sz}\r\n\r\n", lines(5)
    assert_equal "Hello", @client.read(5)
  end

  def test_persistent_timeout
    @server.instance_variable_set(:@persistent_timeout, 1)
    @client << @valid_request
    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)

    sleep 2

    assert_raises EOFError do
      @client.read_nonblock(1)
    end
  end

  def test_app_sets_content_length
    @body = ["hello", " world"]
    @headers['Content-Length'] = "11"

    @client << @valid_request

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: 11\r\n\r\n",
                 lines(4)
    assert_equal "hello world", @client.read(11)
  end

  def test_allow_app_to_chunk_itself
    @headers = {'Transfer-Encoding' => "chunked" }

    @body = ["5\r\nhello\r\n0\r\n\r\n"]

    @client << @valid_request

    assert_equal "HTTP/1.1 200 OK\r\nTransfer-Encoding: chunked\r\n\r\n5\r\nhello\r\n0\r\n\r\n", lines(7)
  end


  def test_two_requests_in_one_chunk
    @server.instance_variable_set(:@persistent_timeout, 3)

    req = @valid_request.to_s
    req += "GET /second HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\n\r\n"

    @client << req

    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)
  end

  def test_second_request_not_in_first_req_body
    @server.instance_variable_set(:@persistent_timeout, 3)

    req = @valid_request.to_s
    req += "GET /second HTTP/1.1\r\nHost: test.com\r\nContent-Type: text/plain\r\n\r\n"

    @client << req

    sz = @body[0].size.to_s

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4)
    assert_equal "Hello", @client.read(5)

    assert_kind_of Puma::NullIO, @inputs[0]
    assert_kind_of Puma::NullIO, @inputs[1]
  end

  def test_keepalive_doesnt_starve_clients
    sz = @body[0].size.to_s

    @client << @valid_request

    c2 = TCPSocket.new HOST, @port
    c2 << @valid_request

    assert c2.wait_readable(1), "2nd request starved"

    assert_equal "HTTP/1.1 200 OK\r\nX-Header: Works\r\nContent-Length: #{sz}\r\n\r\n", lines(4, c2)
    assert_equal "Hello", c2.read(5)
  ensure
    c2.close
  end

end