class Puma::Client

def setup_body
  @body_read_start = Process.clock_gettime(Process::CLOCK_MONOTONIC, :float_millisecond)
  if @env[HTTP_EXPECT] == CONTINUE
    # TODO allow a hook here to check the headers before
    # going forward
    @io << HTTP_11_100
    @io.flush
  end
  @read_header = false
  body = @parser.body
  te = @env[TRANSFER_ENCODING2]
  if te
    te_lwr = te.downcase
    if te.include? ','
      te_ary = te_lwr.split ','
      te_count = te_ary.count CHUNKED
      te_valid = te_ary[0..-2].all? { |e| ALLOWED_TRANSFER_ENCODING.include? e }
      if te_ary.last == CHUNKED && te_count == 1 && te_valid
        @env.delete TRANSFER_ENCODING2
        return setup_chunked_body body
      elsif te_count >= 1
        raise HttpParserError   , "#{TE_ERR_MSG}, multiple chunked: '#{te}'"
      elsif !te_valid
        raise HttpParserError501, "#{TE_ERR_MSG}, unknown value: '#{te}'"
      end
    elsif te_lwr == CHUNKED
      @env.delete TRANSFER_ENCODING2
      return setup_chunked_body body
    elsif ALLOWED_TRANSFER_ENCODING.include? te_lwr
      raise HttpParserError     , "#{TE_ERR_MSG}, single value must be chunked: '#{te}'"
    else
      raise HttpParserError501  , "#{TE_ERR_MSG}, unknown value: '#{te}'"
    end
  end
  @chunked_body = false
  cl = @env[CONTENT_LENGTH]
  if cl
    # cannot contain characters that are not \d, or be empty
    if CONTENT_LENGTH_VALUE_INVALID.match?(cl) || cl.empty?
      raise HttpParserError, "Invalid Content-Length: #{cl.inspect}"
    end
  else
    @buffer = body.empty? ? nil : body
    @body = EmptyBody
    set_ready
    return true
  end
  remain = cl.to_i - body.bytesize
  if remain <= 0
    @body = StringIO.new(body)
    @buffer = nil
    set_ready
    return true
  end
  if remain > MAX_BODY
    @body = Tempfile.new(Const::PUMA_TMP_BASE)
    @body.unlink
    @body.binmode
    @tempfile = @body
  else
    # The body[0,0] trick is to get an empty string in the same
    # encoding as body.
    @body = StringIO.new body[0,0]
  end
  @body.write body
  @body_remain = remain
  false
end