# HG changeset patch
# User Pavel Pautov
# Date 1605753676 28800
# Node ID 88eca63261c3dca2dcc6185cadc82ec9d549f9a0
# Parent f57a478aa16d2d91eca9ff9726b0503ebbaa0295
gRPC: RST_STREAM(NO_ERROR) handling after "trailer only" responses.
Similarly to the problem fixed in 2096b21fcd10 (ticket #1792),
when a "trailer only" gRPC response (that is, a response with the
END_STREAM flag in the HEADERS frame) was immediately followed by
RST_STREAM(NO_ERROR) in the data preread along with the response
header, RST_STREAM wasn't properly skipped and caused "upstream
rejected request with error 0" errors.
Observed with "unknown service" gRPC errors returned by grpc-go.
Fix is to set ctx->done if we are going to parse additional data,
so the RST_STREAM(NO_ERROR) is properly skipped. Additionally, now
ngx_http_grpc_filter() will complain about frames sent for closed
stream if there are any.
diff -r f57a478aa16d -r 88eca63261c3 src/http/modules/ngx_http_grpc_module.c
--- a/src/http/modules/ngx_http_grpc_module.c Thu Nov 19 17:15:22 2020 +0000
+++ b/src/http/modules/ngx_http_grpc_module.c Wed Nov 18 18:41:16 2020 -0800
@@ -1969,6 +1969,7 @@
}
u->length = 0;
+ ctx->done = 1;
} else {
u->length = 1;