static grpc_mdelem *client_recv_filter(void *user_data, grpc_mdelem *md) {
client_recv_filter_args *a = user_data;
if (md == GRPC_MDELEM_STATUS_200) {
return NULL;
} else if (md->key == GRPC_MDSTR_STATUS) {
char *message_string;
gpr_asprintf(&message_string, "Received http2 header with status: %s",
grpc_mdstr_as_c_string(md->value));
gpr_slice message = gpr_slice_from_copied_string(message_string);
gpr_free(message_string);
grpc_call_element_send_cancel_with_message(a->exec_ctx, a->elem,
GRPC_STATUS_CANCELLED, &message);
return NULL;
} else if (md == GRPC_MDELEM_CONTENT_TYPE_APPLICATION_SLASH_GRPC) {
return NULL;
} else if (md->key == GRPC_MDSTR_CONTENT_TYPE) {
const char *value_str = grpc_mdstr_as_c_string(md->value);
if (strncmp(value_str, EXPECTED_CONTENT_TYPE,
EXPECTED_CONTENT_TYPE_LENGTH) == 0 &&
(value_str[EXPECTED_CONTENT_TYPE_LENGTH] == '+' ||
value_str[EXPECTED_CONTENT_TYPE_LENGTH] == ';')) {
/* Although the C implementation doesn't (currently) generate them,
any custom +-suffix is explicitly valid. */
/* TODO(klempner): We should consider preallocating common values such
as +proto or +json, or at least stashing them if we see them. */
/* TODO(klempner): Should we be surfacing this to application code? */
} else {
/* TODO(klempner): We're currently allowing this, but we shouldn't
see it without a proxy so log for now. */
gpr_log(GPR_INFO, "Unexpected content-type '%s'", value_str);
}
return NULL;
}
return md;
}
// Timer callback.
static void timer_callback(grpc_exec_ctx* exec_ctx, void* arg,
grpc_error* error) {
grpc_call_element* elem = arg;
grpc_deadline_state* deadline_state = elem->call_data;
gpr_mu_lock(&deadline_state->timer_mu);
deadline_state->timer_pending = false;
gpr_mu_unlock(&deadline_state->timer_mu);
if (error != GRPC_ERROR_CANCELLED) {
gpr_slice msg = gpr_slice_from_static_string("Deadline Exceeded");
grpc_call_element_send_cancel_with_message(
exec_ctx, elem, GRPC_STATUS_DEADLINE_EXCEEDED, &msg);
gpr_slice_unref(msg);
}
GRPC_CALL_STACK_UNREF(exec_ctx, deadline_state->call_stack, "deadline_timer");
}
