socket.send can send less data than provided #10002

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opened 2026-08-29 10:40:59 +00:00 by miguel · 0 comments

miguel commented

2026-08-29 10:40:59 +00:00

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When sending large payloads, the low-level socket.send function may decide to send only a portion of the data. The return value should be checked to see if some data was not sent.

Possible fix (not thread safe):

        length = len(out_data)
        while length > 0:
            length -= self.sock.send(out_data[-length:])

Reference: https://github.com/miguelgrinberg/simple-websocket/issues/45

When sending large payloads, the low-level `socket.send` function may decide to send only a portion of the data. The return value should be checked to see if some data was not sent. Possible fix (not thread safe): ```python length = len(out_data) while length > 0: length -= self.sock.send(out_data[-length:]) ``` Reference: https://github.com/miguelgrinberg/simple-websocket/issues/45

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2026-08-29 10:40:59 +00:00

miguel referenced this issue from a commit

2026-09-22 15:36:43 +00:00

Handle fragmented writes (Fixes #10002)

miguel closed this issue

2026-09-22 15:36:43 +00:00

miguel referenced this issue from a commit

2026-09-22 18:24:19 +00:00

Handle fragmented writes (Fixes #10002)