gh-130902 Add optional socket shutdown to close method of HTTPConnection class in http/client.py

Doc/library/socket.rst

@@ -1485,28 +1485,36 @@
    .. availability:: not WASI.
 
 
-.. method:: socket.close()
+.. method:: socket.close(shutdown=False)
 
-   Mark the socket closed.  The underlying system resource (e.g. a file
-   descriptor) is also closed when all file objects from :meth:`makefile`
-   are closed.  Once that happens, all future operations on the socket
-   object will fail. The remote end will receive no more data (after
-   queued data is flushed).
+   Mark the socket closed. The underlying system resource (e.g., a file descriptor) is also
+   closed when all file objects from :meth:`makefile` are closed. Once that happens, all future
+   operations on the socket object will fail. The remote end will receive no more data
+   (after queued data is flushed).
+
+   If the ``shutdown`` parameter is set to ``True``, the socket will first be
+   shut down before closing, ensuring that no further data can be sent or received.
+   This is useful for properly releasing resources and preventing issues like lingering
+   connections or reset by peer (RST) errors in some network conditions. If the parameter is
+   ommited or set to false, the function will continue its normal behavior
 
    Sockets are automatically closed when they are garbage-collected, but
    it is recommended to :meth:`close` them explicitly, or to use a
    :keyword:`with` statement around them.
 
+   .. versionadded:: 3.14
+      Added an optional ``shutdown`` parameter to allow explicit socket shutdown before closing.
+
    .. versionchanged:: 3.6
       :exc:`OSError` is now raised if an error occurs when the underlying
       :c:func:`close` call is made.
 
    .. note::
 
-      :meth:`close` releases the resource associated with a connection but
-      does not necessarily close the connection immediately.  If you want
-      to close the connection in a timely fashion, call :meth:`shutdown`
-      before :meth:`close`.
+      :meth:`close` releases the resource associated with a connection
+      but does not necessarily close the connection immediately. If you want to close the connection in a
+      timely fashion, call :meth:`shutdown` before :meth:`close`, or
+      use this function with the shutdown parameter like this ``socket.close(shutdown=True)``
 
 
 .. method:: socket.connect(address)

Lib/http/client.py

@@ -1012,19 +1012,39 @@ def connect(self):
         if self._tunnel_host:
             self._tunnel()
 
-    def close(self):
-        """Close the connection to the HTTP server."""
+    def close(self, shutdown=False):
+        """Close the connection to the HTTP server.
+        :param shutdown: If True, perform an explicit shutdown of the socket before closing. Defaults to False.
+        :type shutdown: bool, optional
+        """
         self.__state = _CS_IDLE
         try:
             sock = self.sock
             if sock:
                 self.sock = None
-                sock.close()   # close it manually... there may be other refs
+                if shutdown:
+                    try:
+                        sock.shutdown(socket.SHUT_RDWR)
+                    except OSError as e:
+                        print(f"Socket shutdown error: {e}", file=sys.stderr)
+                    except Exception as e:
+                        print(f"Unexpected error during socket shutdown: {e}", file=sys.stderr)
+                try:
+                    sock.close()
+                except OSError as e:
+                    print(f"Socket close error: {e}", file=sys.stderr)
+                except Exception as e:
+                    print(f"Unexpected error during socket close: {e}", file=sys.stderr)
         finally:
             response = self.__response
             if response:
                 self.__response = None
-                response.close()
+                try:
+                    response.close()
+                except OSError as e:
+                    print(f"Response close error: {e}", file=sys.stderr)
+                except Exception as e:
+                    print(f"Unexpected error during response close: {e}", file=sys.stderr)
 
     def send(self, data):
         """Send 'data' to the server.

Lib/test/test_httplib.py

@@ -1,12 +1,15 @@
 import enum
 import errno
 from http import client, HTTPStatus
+from http.client import HTTPConnection
 import io
+from io import StringIO
 import itertools
 import os
 import array
 import re
 import socket
+import sys
 import threading
 
 import unittest
@@ -16,6 +19,7 @@
 from test import support
 from test.support import os_helper
 from test.support import socket_helper
+from unittest.mock import MagicMock
 
 support.requires_working_socket(module=True)
 
@@ -2525,5 +2529,75 @@ def _create_connection(address, timeout=None, source_address=None):
         self.assertTrue(sock.file_closed)
 
 
+
+class TestHTTPSocketShutdown(TestCase):
+    def test_close_with_shutdown(self):
+        mock_socket = MagicMock()
+        mock_socket.close = MagicMock()
+        mock_socket.shutdown = MagicMock()
+        connection = HTTPConnection('www.example.com')
+        connection.sock = mock_socket
+        original_stderr = sys.stderr
+        sys.stderr = StringIO()
+        try:
+            connection.close(shutdown=True)
+            mock_socket.shutdown.assert_called_once_with(2)  # SHUT_RDWR
+            mock_socket.close.assert_called_once()
+            error_output = sys.stderr.getvalue()
+            self.assertEqual(error_output, "")
+        finally:
+            sys.stderr = original_stderr
+
+    def test_close_without_shutdown(self):
+        mock_socket = MagicMock()
+        mock_socket.close = MagicMock()
+        mock_socket.shutdown = MagicMock()
+        connection = HTTPConnection('www.example.com')
+        connection.sock = mock_socket
+        original_stderr = sys.stderr
+        sys.stderr = StringIO()
+        try:
+            connection.close(shutdown=False)
+            mock_socket.shutdown.assert_not_called()
+            mock_socket.close.assert_called_once()
+            error_output = sys.stderr.getvalue()
+            self.assertEqual(error_output, "")
+        finally:
+            sys.stderr = original_stderr
+
+    def test_close_shutdown_error(self):
+        mock_socket = MagicMock()
+        mock_socket.close = MagicMock()
+        mock_socket.shutdown = MagicMock(side_effect=OSError("Shutdown error"))
+        connection = HTTPConnection('www.example.com')
+        connection.sock = mock_socket
+        original_stderr = sys.stderr
+        sys.stderr = StringIO()
+        try:
+            connection.close(shutdown=True)
+            mock_socket.shutdown.assert_called_once_with(2)  # SHUT_RDWR
+            mock_socket.close.assert_called_once()
+            error_output = sys.stderr.getvalue()
+            self.assertIn("Socket shutdown error: Shutdown error", error_output)
+        finally:
+            sys.stderr = original_stderr
+
+    def test_close_unexpected_error(self):
+        mock_socket = MagicMock()
+        mock_socket.close = MagicMock()
+        mock_socket.shutdown = MagicMock(side_effect=Exception("Unexpected error"))
+        connection = HTTPConnection('www.example.com')
+        connection.sock = mock_socket
+        original_stderr = sys.stderr
+        sys.stderr = StringIO()
+        try:
+            connection.close(shutdown=True)
+            mock_socket.shutdown.assert_called_once_with(2)  # SHUT_RDWR
+            mock_socket.close.assert_called_once()
+            error_output = sys.stderr.getvalue()
+            self.assertIn("Unexpected error during socket shutdown: Unexpected error", error_output)
+        finally:
+            sys.stderr = original_stderr
+
 if __name__ == '__main__':
     unittest.main(verbosity=2)

Misc/NEWS.d/next/Library/2025-03-06-16-31-08.gh-issue-130902.mHAtcq.rst

@@ -0,0 +1,4 @@
+Issue: :gh:`130902`
+
+
+Modifies the :meth:`http.client.HTTPConnection.close` of :class:`http.client.HTTPConnection` to include an optional socket ``shutdown``, improving functionality with error handling.