tree 2d6ac4e9372bc00155526cc593c0b5cf329af0a3
parent b559f7f67bcd0f4a07786441422eb21f237aec40
author Maxim Dounin <mdounin@mdounin.ru> 1630929287 +0300
committer Maxim Dounin <mdounin@mdounin.ru> 1630929287 +0300

HTTP/2: fixed window updates when buffering in filters.

In the body read handler, the window was incorrectly calculated
based on the full buffer size instead of the amount of free space
in the buffer.  If the request body is buffered by a filter, and
the buffer is not empty after the read event is generated by the
filter to resume request body processing, this could result in
"http2 negative window update" alerts.

Further, in the body ready handler and in ngx_http_v2_state_read_data()
the buffer wasn't cleared when the data were already written to disk,
so the client might stuck without window updates.