Library import 16 (#2433)

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1 files changed, 98 insertions, 0 deletions

diff --git a/contrib/tools/python3/Lib/asyncio/trsock.py b/contrib/tools/python3/Lib/asyncio/trsock.py
new file mode 100644
index 0000000000..c1f20473b3
--- /dev/null
+++ b/contrib/tools/python3/Lib/asyncio/trsock.py
@@ -0,0 +1,98 @@
+import socket
+
+
+class TransportSocket:
+
+    """A socket-like wrapper for exposing real transport sockets.
+
+    These objects can be safely returned by APIs like
+    `transport.get_extra_info('socket')`.  All potentially disruptive
+    operations (like "socket.close()") are banned.
+    """
+
+    __slots__ = ('_sock',)
+
+    def __init__(self, sock: socket.socket):
+        self._sock = sock
+
+    @property
+    def family(self):
+        return self._sock.family
+
+    @property
+    def type(self):
+        return self._sock.type
+
+    @property
+    def proto(self):
+        return self._sock.proto
+
+    def __repr__(self):
+        s = (
+            f"<asyncio.TransportSocket fd={self.fileno()}, "
+            f"family={self.family!s}, type={self.type!s}, "
+            f"proto={self.proto}"
+        )
+
+        if self.fileno() != -1:
+            try:
+                laddr = self.getsockname()
+                if laddr:
+                    s = f"{s}, laddr={laddr}"
+            except socket.error:
+                pass
+            try:
+                raddr = self.getpeername()
+                if raddr:
+                    s = f"{s}, raddr={raddr}"
+            except socket.error:
+                pass
+
+        return f"{s}>"
+
+    def __getstate__(self):
+        raise TypeError("Cannot serialize asyncio.TransportSocket object")
+
+    def fileno(self):
+        return self._sock.fileno()
+
+    def dup(self):
+        return self._sock.dup()
+
+    def get_inheritable(self):
+        return self._sock.get_inheritable()
+
+    def shutdown(self, how):
+        # asyncio doesn't currently provide a high-level transport API
+        # to shutdown the connection.
+        self._sock.shutdown(how)
+
+    def getsockopt(self, *args, **kwargs):
+        return self._sock.getsockopt(*args, **kwargs)
+
+    def setsockopt(self, *args, **kwargs):
+        self._sock.setsockopt(*args, **kwargs)
+
+    def getpeername(self):
+        return self._sock.getpeername()
+
+    def getsockname(self):
+        return self._sock.getsockname()
+
+    def getsockbyname(self):
+        return self._sock.getsockbyname()
+
+    def settimeout(self, value):
+        if value == 0:
+            return
+        raise ValueError(
+            'settimeout(): only 0 timeout is allowed on transport sockets')
+
+    def gettimeout(self):
+        return 0
+
+    def setblocking(self, flag):
+        if not flag:
+            return
+        raise ValueError(
+            'setblocking(): transport sockets cannot be blocking')