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msgpack: Allow notifications to execute commands.

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Consider: `let vim = rpcstart('nvim', ['--embed'])`

Allows `rpcnotify(vim, ...)` to work like an asynchronous
`rpcrequest(nvim, ...)`.

Helped-by: Michael Reed <m.reed@mykolab.com>
Helped-by: Justin M. Keyes <>
This commit is contained in:
Scott Prager
2014-11-10 13:58:37 -05:00
parent 8d59e74f6c
commit 676133aa9b
4 changed files with 116 additions and 32 deletions
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71
src/nvim/msgpack_rpc/helpers.c
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@@ -351,49 +351,86 @@ void msgpack_rpc_serialize_response(uint64_t response_id,
}
}
static bool msgpack_rpc_is_notification(msgpack_object *req)
{
return req->via.array.ptr[0].via.u64 == 2;
}
msgpack_object *msgpack_rpc_method(msgpack_object *req)
{
msgpack_object *obj = req->via.array.ptr
+ (msgpack_rpc_is_notification(req) ? 1 : 2);
return obj->type == MSGPACK_OBJECT_STR || obj->type == MSGPACK_OBJECT_BIN ?
obj : NULL;
}
msgpack_object *msgpack_rpc_args(msgpack_object *req)
{
msgpack_object *obj = req->via.array.ptr
+ (msgpack_rpc_is_notification(req) ? 2 : 3);
return obj->type == MSGPACK_OBJECT_ARRAY ? obj : NULL;
}
static msgpack_object *msgpack_rpc_msg_id(msgpack_object *req)
{
if (msgpack_rpc_is_notification(req)) {
return NULL;
}
msgpack_object *obj = &req->via.array.ptr[1];
return obj->type == MSGPACK_OBJECT_POSITIVE_INTEGER ? obj : NULL;
}
void msgpack_rpc_validate(uint64_t *response_id,
msgpack_object *req,
Error *err)
{
// response id not known yet
*response_id = 0;
*response_id = NO_RESPONSE;
// Validate the basic structure of the msgpack-rpc payload
if (req->type != MSGPACK_OBJECT_ARRAY) {
api_set_error(err, Validation, _("Request is not an array"));
api_set_error(err, Validation, _("Message is not an array"));
return;
}
if (req->via.array.size != 4) {
api_set_error(err, Validation, _("Request array size should be 4"));
if (req->via.array.size == 0) {
api_set_error(err, Validation, _("Message is empty"));
return;
}
if (req->via.array.ptr[1].type != MSGPACK_OBJECT_POSITIVE_INTEGER) {
api_set_error(err, Validation, _("Id must be a positive integer"));
return;
}
// Set the response id, which is the same as the request
*response_id = req->via.array.ptr[1].via.u64;
if (req->via.array.ptr[0].type != MSGPACK_OBJECT_POSITIVE_INTEGER) {
api_set_error(err, Validation, _("Message type must be an integer"));
return;
}
if (req->via.array.ptr[0].via.u64 != 0) {
api_set_error(err, Validation, _("Message type must be 0"));
uint64_t type = req->via.array.ptr[0].via.u64;
if (type != kMessageTypeRequest && type != kMessageTypeNotification) {
api_set_error(err, Validation, _("Unknown message type"));
return;
}
if (req->via.array.ptr[2].type != MSGPACK_OBJECT_BIN
&& req->via.array.ptr[2].type != MSGPACK_OBJECT_STR) {
if ((type == kMessageTypeRequest && req->via.array.size != 4) ||
(type == kMessageTypeNotification && req->via.array.size != 3)) {
api_set_error(err, Validation, _("Request array size should be 4 (request) "
"or 3 (notification)"));
return;
}
if (type == kMessageTypeRequest) {
msgpack_object *id_obj = msgpack_rpc_msg_id(req);
if (!id_obj) {
api_set_error(err, Validation, _("ID must be a positive integer"));
return;
}
*response_id = id_obj->via.u64;
}
if (!msgpack_rpc_method(req)) {
api_set_error(err, Validation, _("Method must be a string"));
return;
}
if (req->via.array.ptr[3].type != MSGPACK_OBJECT_ARRAY) {
if (!msgpack_rpc_args(req)) {
api_set_error(err, Validation, _("Parameters must be an array"));
return;
}