🐛 fix conn dropped issue occurring in 2.11.900

CHANGES.rst

@@ -1,3 +1,10 @@
+2.11.91 (2024-10-21)
+=====================
+
+- Fixed error in ``is_connected`` for a Connection. The logic is no longer applicable due to how urllib3-future grows.
+  We no longer use the function ``wait_for_read``. Also we stopped using MSG_PEEK for our discrete incoming data watcher
+  due to suspicious behavior noticed. Finally we shielded any exception from attempting to close a broken socket.
+
 2.11.900 (2024-10-21)
 =====================
 

src/urllib3/_async/connection.py

@@ -281,7 +281,6 @@ def is_closed(self) -> bool:
     def is_connected(self) -> bool:
         if self.sock is None:
             return False
-        # wait_for_read: not functional with multiplexed connection!
         if self._promises or self._pending_responses:
             return True
         return self._protocol is not None and self._protocol.has_expired() is False

src/urllib3/_version.py

@@ -1,4 +1,4 @@
 # This file is protected via CODEOWNERS
 from __future__ import annotations
 
-__version__ = "2.11.900"
+__version__ = "2.11.901"

src/urllib3/backend/_async/hface.py

@@ -720,7 +720,6 @@ async def peek_and_react(self) -> bool:
         bck_timeout = self.sock.gettimeout()
         # either there is data ready for us, or there's nothing and we stop waiting
         # almost instantaneously.
-        # we can't use socket.MSG_PEEK in asyncio socket wrapper, it is non-functional.
         self.sock.settimeout(0.001)
 
         try:
@@ -1597,7 +1596,10 @@ async def close(self) -> None:  # type: ignore[override]
                         ):  # don't want our goodbye, never mind then!
                             break
 
-            self.sock.close()
+            try:
+                self.sock.close()
+            except OSError:
+                pass
 
         self._protocol = None
         self._stream_id = None

src/urllib3/backend/hface.py

@@ -768,39 +768,22 @@ def peek_and_react(self) -> bool:
         if self.sock is None or self._protocol is None:
             return False
 
-        try:
-            self.sock.setblocking(False)
-        except OSError:  # disconnected!
-            return False
+        bck_timeout = self.sock.gettimeout()
 
-        # SSLSocket can't support non-zero flag for read.
-        # so, we'll improvise!
-        if isinstance(self.sock, ssl.SSLSocket):
-            try:
-                sock = socket.socket(fileno=self.sock.fileno())
-            except (OSError, AttributeError):
-                # Defensive: that means we can't go further, sock is not standard or don't implement fileno
-                return False
+        self.sock.settimeout(0.001)
 
-            try:
-                peek_data = sock.recv(self.blocksize, socket.MSG_PEEK)
-            except OSError:
-                return False
-            finally:
-                self.sock.setblocking(True)
-        else:
-            try:
-                peek_data = self.sock.recv(self.blocksize, socket.MSG_PEEK)
-            except OSError:
-                return False
-            finally:
-                self.sock.setblocking(True)
+        try:
+            peek_data = self.sock.recv(self.blocksize)
+        except (OSError, TimeoutError, socket.timeout):
+            return False
+        finally:
+            self.sock.settimeout(bck_timeout)
 
         if not peek_data:
             return False
 
         try:
-            self._protocol.bytes_received(self.sock.recv(self.blocksize))
+            self._protocol.bytes_received(peek_data)
         except self._protocol.exceptions():
             return False
 
@@ -1669,7 +1652,10 @@ def close(self) -> None:
                         ):  # don't want our goodbye, never mind then!
                             break
 
-            self.sock.close()
+            try:
+                self.sock.close()
+            except OSError:
+                pass
 
         self._protocol = None
         self._stream_id = None

src/urllib3/connection.py

@@ -27,7 +27,6 @@
 from .response import HTTPResponse
 from .util.timeout import _DEFAULT_TIMEOUT, Timeout
 from .util.util import to_str
-from .util.wait import wait_for_read
 
 try:  # Compiled with SSL?
     import ssl
@@ -291,15 +290,9 @@ def is_closed(self) -> bool:
     def is_connected(self) -> bool:
         if self.sock is None:
             return False
-        # wait_for_read: not functional with multiplexed connection!
         if self._promises or self._pending_responses:
             return True
-        # wait_for_read: not functional w/ UDP!
-        if self._svn == HttpVersion.h3:
-            return self._protocol is not None and self._protocol.has_expired() is False
-        if self._protocol is not None and self._protocol.has_expired() is True:
-            return False
-        return not wait_for_read(self.sock, timeout=0.0)
+        return self._protocol is not None and self._protocol.has_expired() is False
 
     @property
     def has_connected_to_proxy(self) -> bool: