Fix some issues, improve documentation

client/command.py

@@ -41,11 +41,13 @@ class AbstractCommand(ABC):
     host: str
     path: str
     port: int
+    sub_request: bool
 
     def __init__(self, uri: str, port):
         self.uri = uri
         self.host, _, self.path = parser.parse_uri(uri)
         self.port = int(port)
+        self.sub_request = False
 
     @property
     @abstractmethod
@@ -53,6 +55,7 @@ class AbstractCommand(ABC):
         pass
 
     def execute(self, sub_request=False):
+        self.sub_request = sub_request
         (host, path) = self.parse_uri()
 
         client = sockets.get(host)
@@ -169,9 +172,10 @@ class GetCommand(AbstractCommand):
         (version, status, msg) = parser.parse_status_line(next(lines))
         headers = parser.parse_headers(lines)
 
-        logging.debug("---response begin---\r\n%s---response end---", "".join(retriever.buffer))
+        buffer = retriever.buffer
+        logging.debug("---response begin---\r\n%s---response end---", "".join(buffer))
 
-        return Message(version, status, msg, headers, retriever.buffer)
+        return Message(version, status, msg, headers, buffer)
 
     def _await_response(self, client, retriever):
         msg = self._get_preamble(retriever)