alt Hacker NewsNo, I was referencing the example in the article in literally the very first section showing and explaining how POST endpoints are used for fetching data when GET endpoints are too limited. This is literally their motivating impetus for the QUERY request type.
When considered abstractly, POST is just a request body and a response body. This is obviously powerful enough to define any behavior you want; it is just a channel flowing a nearly arbitrary amount of opaque data between the client and server.
However, this kind of sucks because it does not define or constrain the behavior of the client or the server. QUERY says that the server is intended to interpret the request body as fetch parameters and return a response body as the fetched data, and further guarantee that the fetch is safe/idempotent. This is very useful.
My disagreement is that there is no good reason for the client request format to care. You should “POST” to a “QUERY” endpoint. The fact that this endpoint guarantees QUERY behavior is just part of the documented server interface in the same way that certain endpoints may not support PUT. This is a server constraint, not a client constraint so should not change the client transport format.
Requiring a new Client request type to agree with a new Server endpoint type is just unnecessary and mixes up server versus client responsibility and interface design.
I'm not following how this is different from not even using HTTP verbs. We didn't define them because it's the only possible way to declare client intent. They're cognitively useful for setting expectations, organization, announcing abilities, separation of concerns, etc. The fact that POST is today sometimes used in practice as a safe+idempotent query (i.e. a GET with a body) seems like the black sheep violating those useful qualities.