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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.
author Maxim Dounin <mdounin@mdounin.ru>
date Mon, 06 Sep 2021 14:54:47 +0300
parents 549b13cd793b
children
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


NGX_MAKEFILE=$NGX_OBJS/Makefile
NGX_MODULES_C=$NGX_OBJS/ngx_modules.c

NGX_AUTO_HEADERS_H=$NGX_OBJS/ngx_auto_headers.h
NGX_AUTO_CONFIG_H=$NGX_OBJS/ngx_auto_config.h

NGX_AUTOTEST=$NGX_OBJS/autotest
NGX_AUTOCONF_ERR=$NGX_OBJS/autoconf.err

# STUBs
NGX_ERR=$NGX_OBJS/autoconf.err
MAKEFILE=$NGX_OBJS/Makefile


NGX_PCH=
NGX_USE_PCH=


# check the echo's "-n" option and "\c" capability

if echo "test\c" | grep c >/dev/null; then

    if echo -n test | grep n >/dev/null; then
        ngx_n=
        ngx_c=

    else
        ngx_n=-n
        ngx_c=
    fi

else
    ngx_n=
    ngx_c='\c'
fi


# create Makefile

cat << END > Makefile

default:	build

clean:
	rm -rf Makefile $NGX_OBJS

.PHONY:	default clean
END