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gRPC: special handling of "trailer only" responses. The gRPC protocol makes a distinction between HEADERS frame with the END_STREAM flag set, and a HEADERS frame followed by an empty DATA frame with the END_STREAM flag. The latter is not permitted, and results in errors not being propagated through nginx. Instead, gRPC clients complain that "server closed the stream without sending trailers" (seen in grpc-go) or "13: Received RST_STREAM with error code 2" (seen in grpc-c). To fix this, nginx now returns HEADERS with the END_STREAM flag if the response length is known to be 0, and we are not expecting any trailer headers to be added. And the response length is explicitly set to 0 in the gRPC proxy if we see initial HEADERS frame with the END_STREAM flag set.
author Maxim Dounin <mdounin@mdounin.ru>
date Sat, 17 Mar 2018 23:04:26 +0300
parents d620f497c50f
children
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# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


# Compaq C V6.5-207

ngx_include_opt="-I"

# warnings

CFLAGS="$CFLAGS -msg_enable level6 -msg_fatal level6"

CFLAGS="$CFLAGS -msg_disable unknownmacro"
CFLAGS="$CFLAGS -msg_disable unusedincl"
CFLAGS="$CFLAGS -msg_disable unnecincl"
CFLAGS="$CFLAGS -msg_disable nestincl"
CFLAGS="$CFLAGS -msg_disable strctpadding"
CFLAGS="$CFLAGS -msg_disable ansialiascast"
CFLAGS="$CFLAGS -msg_disable inlinestoclsmod"
CFLAGS="$CFLAGS -msg_disable cxxkeyword"
CFLAGS="$CFLAGS -msg_disable longlongsufx"
CFLAGS="$CFLAGS -msg_disable valuepres"

# STUB
CFLAGS="$CFLAGS -msg_disable truncintcast"
CFLAGS="$CFLAGS -msg_disable trunclongcast"

CFLAGS="$CFLAGS -msg_disable truncintasn"
CFLAGS="$CFLAGS -msg_disable trunclongint"
CFLAGS="$CFLAGS -msg_disable intconcastsgn"
CFLAGS="$CFLAGS -msg_disable intconstsign"
CFLAGS="$CFLAGS -msg_disable switchlong"
CFLAGS="$CFLAGS -msg_disable subscrbounds2"

CFLAGS="$CFLAGS -msg_disable hexoctunsign"

CFLAGS="$CFLAGS -msg_disable ignorecallval"
CFLAGS="$CFLAGS -msg_disable nonstandcast"
CFLAGS="$CFLAGS -msg_disable embedcomment"
CFLAGS="$CFLAGS -msg_disable unreachcode"
CFLAGS="$CFLAGS -msg_disable questcompare2"
CFLAGS="$CFLAGS -msg_disable unusedtop"
CFLAGS="$CFLAGS -msg_disable unrefdecl"

CFLAGS="$CFLAGS -msg_disable bitnotint"