jsonrpc++
Leightweight C++ JSON-RPC 2.0 library
What it is
jsonrpc++ parses and constructs JSON-RPC 2.0 objects, like
Example: Parsing a request
jsonrpcpp::entity_ptr entity = jsonrpcpp::Parser::do_parse(R"({"jsonrpc": "2.0", "method": "subtract", "params": {"subtrahend": 23, "minuend": 42}, "id": 3})");
if (entity->is_request())
{
jsonrpcpp::request_ptr request = dynamic_pointer_cast<jsonrpcpp::Request>(entity);
if (request->method() == "subtract")
{
int result = request->params().get<int>("minuend") - request->params().get<int>("subtrahend");
jsonrpcpp::Response response(*request, result);
cout << " Response: " << response.to_json().dump() << "\n";
//will print: {"jsonrpc": "2.0", "result": 19, "id": 3}
}
else
throw jsonrpcpp::MethodNotFoundException(*request);
}What it not is
jsonrpc++ is completely transport agnostic, i.e. it doesn't care about transportation of the messages and there is no TCP client or server component shipped with this library.
As JSON backbone JSON for Modern C++ is used.
Some code example
jsonrpcpp::entity_ptr entity =
jsonrpcpp::Parser::do_parse(R"({"jsonrpc": "2.0", "method": "subtract", "params": {"subtrahend": 23, "minuend": 42}, "id": 3})");
if (entity && entity->is_request())
{
jsonrpcpp::request_ptr request = dynamic_pointer_cast<jsonrpcpp::Request>(entity);
cout << " Request: " << request->method() << ", id: " << request->id() << ", has params: " << !request->params().is_null() << "\n";
if (request->method() == "subtract")
{
int result;
if (request->params().is_array())
result = request->params().get<int>(0) - request->params().get<int>(1);
else
result = request->params().get<int>("minuend") - request->params().get<int>("subtrahend");
jsonrpcpp::Response response(*request, result);
cout << " Response: " << response.to_json().dump() << "\n";
}
else if (request->method() == "sum")
{
int result = 0;
for (const auto& summand : request->params().param_array)
result += summand.get<int>();
jsonrpcpp::Response response(*request, result);
cout << " Response: " << response.to_json().dump() << "\n";
}
else
{
throw jsonrpcpp::MethodNotFoundException(*request);
}
}