Hands-On Microservices with Rust

How JSON-RPC works

The JSON-RPC protocol uses JSON messages in the following format for a request:

{"jsonrpc": "2.0", "method": "substring", "params": [2, 6, \"string\"], "id": 1}

The preceding JSON message calls the substring remote method of a server that can return a result like this:

{"jsonrpc": "2.0", "result": "ring", "id": 1}

It's worth nothing that a client determines the identifier of the request and has to track those values. Servers are ID-agnostic and they use a connection to track requests.

There are two versions of the protocol—1.0 and 2.0. They are similar, but in the second version there is a separation of the client and the server. Also, it is transport independent, because the first version uses connection events to determine ...