Simple JSON-RPC

SRPC is a high level and asynchronous JSON-RPC client and server library which aims for ease of use. It only supports transportation over TCP sockets for now.

Note

SRPC is in the early development phase.

Usage

Server side

use srpc::server::Server;
use std::sync::Arc;

struct StrService {
    // Some server data
};

#[srpc::service]
#[allow(unused)]
impl StrService {
    // 'self' and 'context' params are reserved. They are not transferred.
    // 'self' is used for local server data.
    // 'context' contains address of the caller.
    // Reserved params are optional.
    async fn foo(self: Arc<Self>, context: Arc<Context>, x: i32, y: i32) -> i32 {
    	x + y
    }

    async fn bar(is_cool: bool) {
        println!("Is cool? {}", is_cool);
    }
}

#[tokio::main]
async fn main() {
    let server = Server::new(StrService{ /* data */ }, StrService::caller);
    let _ = server.serve("127.0.0.1:8080").await;
}

Client side

 use {
     srpc::{client::Client, transport::Transport},
     std::sync::Arc,
 };
 
 #[srpc::client]
 trait StrService {
     // Define an RPC call, that expects and waits for a response.
     // Note that reserved params does not exist in the client side.
     async fn foo(x: i32, y: i32) -> i32;
     
     // Define an RPC notification that does not wait for a response.
     #[notification] 
     async fn bar(is_cool: bool);
 }
 
 #[tokio::main]
 async fn main() {
     let transporter = Arc::new(Transport::new());
     let client = Client::new(([127, 0, 0, 1], 8080).into(), transporter.clone());

          
     let _ = StrService::foo(&client, true).await;
     let res = StrService::bar(&client, 3, 5)
                 .await
                 .unwrap();
     println!("{}", res);
 }

Current Version Supports (0.1.0)

• JSON-RPC 2.0
• Persistent connection
• Batched requests on the server side
• Asyncronous RPC methods
• Tokio as runtime

Future Releases

• Batched requests on the client side (0.2.0)
• Blocking annotation for blocking RPC methods (0.2.0)
• Executor agnostic (0.3.0)
• Data framing over TCP (0.3.0)
• JSON-RPC 1.0 (after 0.3.0)

Contribution

I don't have a contribution guideline yet, so feel free to go to issues, pick one and send a PR :) Easy ones are marked with "good first issue" label.