8000 gh-112020: socketserver: Add an example for keeping the connection open by talcs · Pull Request #112054 · python/cpython · GitHub
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gh-112020: socketserver: Add an example for keeping the connection open #112054

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gh-112020: socketserver: Add an example for keeping the connection open #112054

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272de5b
Update socketserver.rst
talcs Nov 14, 2023
8028b11
whitespace
AA-Turner Jan 12, 2024
6828277
Update Doc/library/socketserver.rst
talcs Feb 20, 2024
8dfe64a
Added while loop to the existing handler example
talcs Feb 20, 2024
d92bebb
updating readline example too
talcs Feb 20, 2024
93c7d86
solved conflicts
talcs Feb 20, 2024
9c6ad3c
fix while loops in handler
talcs Feb 21, 2024
d860d46
Update socketserver.rst
talcs Feb 21, 2024
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18 changes: 18 additions & 0 deletions Doc/library/socketserver.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -528,6 +528,24 @@ The difference is that the ``readline()`` call in the second handler will call
single ``recv()`` call in the first handler will just return what has been sent
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In the line above add "or ``recv()`` returns an empty bytes object" after "until it encounters a newline character"

from the client in one ``sendall()`` call.

The handlers presented above close the connection after handling a single request.
It is possible, however, to keep the connection open to handle many requests,
until the client hangs up::

class MyTCPHandler(socketserver.BaseRequestHandler):

def handle(self):
while True:
# self.request is the TCP socket connected to the client
self.data = self.request.recv(1024)
# `socket.recv` indicates that the client has hung up by returning 0 bytes
if len(self.data) == 0:
return
print("{} wrote:".format(self.client_address[0]))
print(self.data)
# just send back the same data, but upper-cased
self.request.sendall(self.data.upper())


This is the client side::

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