JsonRpcClient 1.0.1

JSON RPC 2.0 Client

Provides classes for creating JSON RPC 2.0 clients in C#.

Usage

Supposing the JSON RPC server defines the methods "add", "subtract", and "divide", expecting requests like this:

{
  "id": 1,
  "method": "add",
  "params": [2, 3],
  "jsonrpc": "2.0"
}

{
  "id": 2,
  "method": "subtract",
  "params": [2, 3],
  "jsonrpc": "2.0"
}

{
  "id": 3,
  "method": "divide",
  "params": [3, 2],
  "jsonrpc": "2.0"
}

Defining and using the corresponding client would look like this:

using System.Collections.Generic;
using System.Threading.Tasks;
using JsonRpcClient.Clients;
using Newtonsoft.Json;

namespace MathJsonRpcClient
{
    public class MathClientDriver()
    {
        public void main(string[] args)
        {
            var client = new MathClient("http://localhost:5000/api/v1");
            client.add(2, 3);
            client.subtract(2, 3);
            client.divide(3, 2);
        }
    }

    public class MathClient : RpcHttpClient
    {
        public async Task<int> Add(int a, int b)
        {
            return await Call("add", new List<int>{a, b});
        }

        public async Task<int> Subtract(int a, int b)
        {
            return await Call("subtract", new List<int>{a, b});
        }

        public async Task<float> Divide(int a, int b)
        {
            return await Call("divide", new List<int>{a, b});
        }
    }
}

This client will form request bodies, send them to the server and return the result.

Errors

If the server responds with an error, an RpcError is thrown. There is an RpcError for each standard JSON RPC 2.0 error, each of them extends RpcError.

public void main(string[] args)
{
    var client = new MathClient("http://localhost:5000/api/v1");

    try
    {
        client.add("two", "three");
    }
    catch (InvalidParams e)
    {
        Console.WriteLine(e);
    }

    try
    {
        client.divide(0, 0);
    }
    catch (ServerError e)
    {
        Console.WriteLine(e);
    }
}