handleRequest -- handle a JSON-RPC request

• Usage:

  handleRequest(server, str)

• Inputs:
  • server, a JSON-RPC server,
  • str, a string, a JSON-RPC 2.0 request object;
• Outputs:
  • a string or null, the response to the request or null if the request was a notification

i1 : server = new JSONRPCServer

o1 = server

o1 : JSONRPCServer

i2 : registerMethod(server, "sum", plus)

i3 : handleRequest(server, makeRequest("sum", {2, 3}, 1))

o3 = {"result": 5, "jsonrpc": "2.0", "id": 1}

i4 : handleRequest(server, makeRequest({("sum", {4, 5}, 2), ("sum", {6, 7}, 3)}))

o4 = [{"result": 9, "jsonrpc": "2.0", "id": 2}, {"result": 13, "jsonrpc":
     "2.0", "id": 3}]