[Python-checkins] cpython (3.2): Issue #15842: the SocketIO.{readable,writable,seekable} methods now raise

Fri Sep 14 17:34:18 CEST 2012

http://hg.python.org/cpython/rev/fad797916266
changeset: 79026:fad797916266
branch: 3.2
parent: 79023:b01eb870f84f
user: Antoine Pitrou <solipsis at pitrou.net>
date: Fri Sep 14 17:28:10 2012 +0200
summary:
 Issue #15842: the SocketIO.{readable,writable,seekable} methods now raise ValueError when the file-like object is closed.
Patch by Alessandro Moura.
files:
 Lib/socket.py | 15 +++++++++++++--
 Lib/test/test_socket.py | 11 +++++++++++
 Misc/NEWS | 4 ++++
 3 files changed, 28 insertions(+), 2 deletions(-)

diff --git a/Lib/socket.py b/Lib/socket.py
--- a/Lib/socket.py
+++ b/Lib/socket.py
@@ -315,12 +315,23 @@
 def readable(self):
 """True if the SocketIO is open for reading.
 """
- return self._reading and not self.closed
+ if self.closed:
+ raise ValueError("I/O operation on closed socket.")
+ return self._reading
 
 def writable(self):
 """True if the SocketIO is open for writing.
 """
- return self._writing and not self.closed
+ if self.closed:
+ raise ValueError("I/O operation on closed socket.")
+ return self._writing
+
+ def seekable(self):
+ """True if the SocketIO is open for seeking.
+ """
+ if self.closed:
+ raise ValueError("I/O operation on closed socket.")
+ return super().seekable()
 
 def fileno(self):
 """Return the file descriptor of the underlying socket.
diff --git a/Lib/test/test_socket.py b/Lib/test/test_socket.py
--- a/Lib/test/test_socket.py
+++ b/Lib/test/test_socket.py
@@ -839,6 +839,17 @@
 fp.close()
 self.assertEqual(repr(fp), "<_io.BufferedReader name=-1>")
 
+ def test_unusable_closed_socketio(self):
+ with socket.socket() as sock:
+ fp = sock.makefile("rb", buffering=0)
+ self.assertTrue(fp.readable())
+ self.assertFalse(fp.writable())
+ self.assertFalse(fp.seekable())
+ fp.close()
+ self.assertRaises(ValueError, fp.readable)
+ self.assertRaises(ValueError, fp.writable)
+ self.assertRaises(ValueError, fp.seekable)
+
 def testListenBacklog0(self):
 srv = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
 srv.bind((HOST, 0))
diff --git a/Misc/NEWS b/Misc/NEWS
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -120,6 +120,10 @@
 Library
 -------
 
+- Issue #15842: the SocketIO.{readable,writable,seekable} methods now
+ raise ValueError when the file-like object is closed. Patch by Alessandro
+ Moura.
+
 - Issue #15881: Fixed atexit hook in multiprocessing. Original patch
 by Chris McDonough.
 
-- 
Repository URL: http://hg.python.org/cpython
