class Puma::Client

def parser_execute
  @parser.execute(@env, @buffer, @parsed_bytes)
rescue => e
  @env[HTTP_CONNECTION] = 'close'
  raise e unless HttpParserError === e && e.message.include?('non-SSL')
  req, _ = @buffer.split "\r\n\r\n"
  request_line, headers = req.split "\r\n", 2
  # below checks for request issues and changes error message accordingly
  if !@env.key? REQUEST_METHOD
    if request_line.count(' ') != 2
       # maybe this is an SSL connection ?
      raise e
    else
      method = request_line[/\A[^ ]+/]
      raise e, "Invalid HTTP format, parsing fails. Bad method #{method}"
    end
  elsif !@env.key? REQUEST_PATH
    path = request_line[/\A[^ ]+ +([^ ?\r\n]+)/, 1]
    raise e, "Invalid HTTP format, parsing fails. Bad path #{path}"
  elsif request_line.match?(/\A[^ ]+ +[^ ?\r\n]+\?/) && !@env.key?(QUERY_STRING)
    query = request_line[/\A[^ ]+ +[^? ]+\?([^ ]+)/, 1]
    raise e, "Invalid HTTP format, parsing fails. Bad query #{query}"
  elsif !@env.key? SERVER_PROTOCOL
    # protocol is bad
    text = request_line[/[^ ]*\z/]
    raise HttpParserError, "Invalid HTTP format, parsing fails. Bad protocol #{text}"
  elsif !headers.empty?
    # headers are bad
    hdrs = headers.split("\r\n").map { |h| h.gsub "\n", '\n'}.join "\n"
    raise HttpParserError, "Invalid HTTP format, parsing fails. Bad headers\n#{hdrs}"
  end
end