static void on_initial_md_ready(grpc_exec_ctx *exec_ctx, void *user_data, grpc_error *err) { grpc_call_element *elem = (grpc_call_element *)user_data; call_data *calld = (call_data *)elem->call_data; if (err == GRPC_ERROR_NONE) { if (calld->recv_initial_metadata->idx.named.path != NULL) { calld->service_method = grpc_slice_ref_internal( GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.path->md)); calld->have_service_method = true; } else { err = grpc_error_add_child( err, GRPC_ERROR_CREATE_FROM_STATIC_STRING("Missing :path header")); } if (calld->recv_initial_metadata->idx.named.lb_token != NULL) { calld->initial_md_string = grpc_slice_ref_internal( GRPC_MDVALUE(calld->recv_initial_metadata->idx.named.lb_token->md)); calld->have_initial_md_string = true; grpc_metadata_batch_remove( exec_ctx, calld->recv_initial_metadata, calld->recv_initial_metadata->idx.named.lb_token); } } else { GRPC_ERROR_REF(err); } calld->ops_recv_initial_metadata_ready->cb( exec_ctx, calld->ops_recv_initial_metadata_ready->cb_arg, err); GRPC_ERROR_UNREF(err); }
static grpc_error *process_send_initial_metadata( grpc_exec_ctx *exec_ctx, grpc_call_element *elem, grpc_metadata_batch *initial_metadata, bool *has_compression_algorithm) { call_data *calld = elem->call_data; channel_data *channeld = elem->channel_data; *has_compression_algorithm = false; /* Parse incoming request for compression. If any, it'll be available * at calld->compression_algorithm */ if (initial_metadata->idx.named.grpc_internal_encoding_request != NULL) { grpc_mdelem md = initial_metadata->idx.named.grpc_internal_encoding_request->md; if (!grpc_compression_algorithm_parse(GRPC_MDVALUE(md), &calld->compression_algorithm)) { char *val = grpc_slice_to_c_string(GRPC_MDVALUE(md)); gpr_log(GPR_ERROR, "Invalid compression algorithm: '%s' (unknown). Ignoring.", val); gpr_free(val); calld->compression_algorithm = GRPC_COMPRESS_NONE; } if (!GPR_BITGET(channeld->enabled_algorithms_bitset, calld->compression_algorithm)) { char *val = grpc_slice_to_c_string(GRPC_MDVALUE(md)); gpr_log(GPR_ERROR, "Invalid compression algorithm: '%s' (previously disabled). " "Ignoring.", val); gpr_free(val); calld->compression_algorithm = GRPC_COMPRESS_NONE; } *has_compression_algorithm = true; grpc_metadata_batch_remove( exec_ctx, initial_metadata, initial_metadata->idx.named.grpc_internal_encoding_request); } else { /* If no algorithm was found in the metadata and we aren't * exceptionally skipping compression, fall back to the channel * default */ calld->compression_algorithm = channeld->default_compression_algorithm; *has_compression_algorithm = true; } grpc_error *error = GRPC_ERROR_NONE; /* hint compression algorithm */ if (calld->compression_algorithm != GRPC_COMPRESS_NONE) { error = grpc_metadata_batch_add_tail( exec_ctx, initial_metadata, &calld->compression_algorithm_storage, grpc_compression_encoding_mdelem(calld->compression_algorithm)); } if (error != GRPC_ERROR_NONE) return error; /* convey supported compression algorithms */ error = grpc_metadata_batch_add_tail( exec_ctx, initial_metadata, &calld->accept_encoding_storage, GRPC_MDELEM_ACCEPT_ENCODING_FOR_ALGORITHMS( channeld->supported_compression_algorithms)); return error; }