overflow_api_service/grpc/grpc.proto

syntax = "proto3";
package gwrpc;

import "google/api/annotations.proto";

message ServiceInput {
    string serviceName = 1;
    string methodName = 2;
    map<string,string> param = 3;
}

message ServiceOutput {
    string resultStr = 1;
}

service OverflowGateway {
    rpc ExecServices(ServiceInput) returns (ServiceOutput) {
        option (google.api.http) = {
            post: "/v1/overflow/services"
            body: "*"
        };
    }
}