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Upstream: u->conf->preserve_output flag.

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The flag can be used to continue sending request body even after we've
got a response from the backend.  In particular, this is needed for gRPC
proxying of bidirectional streaming RPCs, and also to send control frames
in other forms of RPCs.
This commit is contained in:
Maxim Dounin 2018-03-17 23:04:23 +03:00
parent 7be60194c1
commit c67124190c
2 changed files with 5 additions and 2 deletions
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6
src/http/ngx_http_upstream.c
View File

@ -2031,7 +2031,9 @@ ngx_http_upstream_send_request(ngx_http_request_t *r, ngx_http_upstream_t *u,
c->tcp_nopush = NGX_TCP_NOPUSH_UNSET;
}
u->write_event_handler = ngx_http_upstream_dummy_handler;
if (!u->conf->preserve_output) {
u->write_event_handler = ngx_http_upstream_dummy_handler;
}
if (ngx_handle_write_event(c->write, 0) != NGX_OK) {
ngx_http_upstream_finalize_request(r, u,
@ -2193,7 +2195,7 @@ ngx_http_upstream_send_request_handler(ngx_http_request_t *r,
#endif
if (u->header_sent) {
if (u->header_sent && !u->conf->preserve_output) {
u->write_event_handler = ngx_http_upstream_dummy_handler;
(void) ngx_handle_write_event(c->write, 0);

1
src/http/ngx_http_upstream.h
View File

@ -223,6 +223,7 @@ typedef struct {
unsigned intercept_404:1;
unsigned change_buffering:1;
unsigned pass_trailers:1;
unsigned preserve_output:1;
#if (NGX_HTTP_SSL || NGX_COMPAT)
ngx_ssl_t *ssl;