diff options
Diffstat (limited to 'src/core/ext/filters/load_reporting/load_reporting_filter.c')
| -rw-r--r-- | src/core/ext/filters/load_reporting/load_reporting_filter.c | 27 |
1 files changed, 26 insertions, 1 deletions
diff --git a/src/core/ext/filters/load_reporting/load_reporting_filter.c b/src/core/ext/filters/load_reporting/load_reporting_filter.c index 57b25d0651..75a9a56687 100644 --- a/src/core/ext/filters/load_reporting/load_reporting_filter.c +++ b/src/core/ext/filters/load_reporting/load_reporting_filter.c @@ -48,6 +48,8 @@ typedef struct call_data { intptr_t id; /**< an id unique to the call */ + bool have_trailing_md_string; + grpc_slice trailing_md_string; bool have_initial_md_string; grpc_slice initial_md_string; bool have_service_method; @@ -140,6 +142,9 @@ static void destroy_call_elem(grpc_exec_ctx *exec_ctx, grpc_call_element *elem, if (calld->have_initial_md_string) { grpc_slice_unref_internal(exec_ctx, calld->initial_md_string); } + if (calld->have_trailing_md_string) { + grpc_slice_unref_internal(exec_ctx, calld->trailing_md_string); + } if (calld->have_service_method) { grpc_slice_unref_internal(exec_ctx, calld->service_method); } @@ -183,6 +188,18 @@ static void destroy_channel_elem(grpc_exec_ctx *exec_ctx, */ } +static grpc_filtered_mdelem lr_trailing_md_filter(grpc_exec_ctx *exec_ctx, + void *user_data, + grpc_mdelem md) { + grpc_call_element *elem = user_data; + call_data *calld = elem->call_data; + if (grpc_slice_eq(GRPC_MDKEY(md), GRPC_MDSTR_LB_COST_BIN)) { + calld->trailing_md_string = GRPC_MDVALUE(md); + return GRPC_FILTERED_REMOVE(); + } + return GRPC_FILTERED_MDELEM(md); +} + static void lr_start_transport_stream_op_batch( grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_transport_stream_op_batch *op) { @@ -190,13 +207,21 @@ static void lr_start_transport_stream_op_batch( call_data *calld = elem->call_data; if (op->recv_initial_metadata) { + /* substitute our callback for the higher callback */ calld->recv_initial_metadata = op->payload->recv_initial_metadata.recv_initial_metadata; - /* substitute our callback for the higher callback */ calld->ops_recv_initial_metadata_ready = op->payload->recv_initial_metadata.recv_initial_metadata_ready; op->payload->recv_initial_metadata.recv_initial_metadata_ready = &calld->on_initial_md_ready; + } else if (op->send_trailing_metadata) { + GRPC_LOG_IF_ERROR( + "grpc_metadata_batch_filter", + grpc_metadata_batch_filter( + exec_ctx, + op->payload->send_trailing_metadata.send_trailing_metadata, + lr_trailing_md_filter, elem, + "LR trailing metadata filtering error")); } grpc_call_next_op(exec_ctx, elem, op); |