HTTP/2: enforce writing the sync request body buffer to file. The sync flag of HTTP/2 request body buffer is used when the size of request body is unknown or bigger than configured "client_body_buffer_size". In this case the buffer points to body data inside the global receive buffer that is used for reading all HTTP/2 connections in the worker process. Thus, when the sync flag is set, the buffer must be flushed to a temporary file, otherwise the request body data can be overwritten. Previously, the sync buffer wasn't flushed to a temporary file if the whole body was received in one DATA frame with the END_STREAM flag and wasn't copied into the HTTP/2 body preread buffer. As a result, the request body might be corrupted (ticket #1384). Now, setting r->request_body_in_file_only enforces writing the sync buffer to a temporary file in all cases.

# 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
END