JSON-RPC 2.0

Golang implementation of JSON-RPC 2.0 server with generics.

Go 1.18+ required

Features:

• HTTP/HTTPS transport
• TCP transport
• WebSocket transport

Usage (http transport)

1. Create JSON-RPC server:

    import "go.neonxp.dev/jsonrpc2/rpc"
    ...
    s := rpc.New()

2. Add required transport(s):

    import "go.neonxp.dev/jsonrpc2/transport"
    ...
    s.AddTransport(&transport.HTTP{Bind: ":8000"})
    s.AddTransport(&transport.TCP{Bind: ":3000"})

3. Write handler:

    func Multiply(ctx context.Context, args *Args) (int, error) {
        return args.A * args.B, nil
    }

Handler must have exact two arguments (context and input of any json serializable type) and exact two return values (output of any json serializable type and error) 3. Wrap handler with rpc.Wrap method and register it in server:

    s.Register("multiply", rpc.H(Multiply))

4. Run RPC server:

    s.Run(ctx)

Custom transport

Any transport must implement simple interface transport.Transport:

type Transport interface {
	Run(ctx context.Context, resolver Resolver) error
}

Complete example

Full code

package main

import (
   "context"

   "go.neonxp.dev/jsonrpc2/rpc"
   "go.neonxp.dev/jsonrpc2/transport"
)

func main() {
   s := rpc.New()

   s.AddTransport(&transport.HTTP{Bind: ":8000"}) // HTTP transport
   s.AddTransport(&transport.TCP{Bind: ":3000"}) // TCP transport

   s.Register("multiply", rpc.H(Multiply))
   s.Register("divide", rpc.H(Divide))

   s.Run(context.Background())
}

func Multiply(ctx context.Context, args *Args) (int, error) {
    //...
}

func Divide(ctx context.Context, args *Args) (*Quotient, error) {
    //...
}

type Args struct {
	A int `json:"a"`
	B int `json:"b"`
}

type Quotient struct {
	Quo int `json:"quo"`
	Rem int `json:"rem"`
}

Author

Alexander Kiryukhin i@neonxp.dev

License