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-rw-r--r--Lib/asynchat.py3
-rw-r--r--Lib/test/test_asynchat.py16
-rw-r--r--Misc/NEWS3
3 files changed, 22 insertions, 0 deletions
diff --git a/Lib/asynchat.py b/Lib/asynchat.py
index ac83eea..e5337f7 100644
--- a/Lib/asynchat.py
+++ b/Lib/asynchat.py
@@ -181,6 +181,9 @@ class async_chat (asyncore.dispatcher):
self.close()
def push (self, data):
+ if not isinstance(data, (bytes, bytearray, memoryview)):
+ raise TypeError('data argument must be byte-ish (%r)',
+ type(data))
sabs = self.ac_out_buffer_size
if len(data) > sabs:
for i in range(0, len(data), sabs):
diff --git a/Lib/test/test_asynchat.py b/Lib/test/test_asynchat.py
index 55e0d2a..23944d7 100644
--- a/Lib/test/test_asynchat.py
+++ b/Lib/test/test_asynchat.py
@@ -250,6 +250,22 @@ class TestAsynchat(unittest.TestCase):
# (which could still result in the client not having received anything)
self.assertGreater(len(s.buffer), 0)
+ def test_push(self):
+ # Issue #12523: push() should raise a TypeError if it doesn't get
+ # a bytes string
+ s, event = start_echo_server()
+ c = echo_client(b'\n', s.port)
+ data = b'bytes\n'
+ c.push(data)
+ c.push(bytearray(data))
+ c.push(memoryview(data))
+ self.assertRaises(TypeError, c.push, 10)
+ self.assertRaises(TypeError, c.push, 'unicode')
+ c.push(SERVER_QUIT)
+ asyncore.loop(use_poll=self.usepoll, count=300, timeout=.01)
+ s.join(timeout=TIMEOUT)
+ self.assertEqual(c.contents, [b'bytes', b'bytes', b'bytes'])
+
class TestAsynchat_WithPoll(TestAsynchat):
usepoll = True
diff --git a/Misc/NEWS b/Misc/NEWS
index af1fe3a..ce35e3e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -108,6 +108,9 @@ Core and Builtins
Library
-------
+- Issue #12523: asynchat.async_chat.push() now raises a TypeError if it doesn't
+ get a bytes string
+
- Issue #21707: Add missing kwonlyargcount argument to
ModuleFinder.replace_paths_in_code().