begin conversion to rpc over http

Per specification at
https://github.com/ethereum/wiki/wiki/Generic-JSON-RPC

rpc/json.go

@@ -3,6 +3,7 @@ package rpc
 import (
 	"encoding/json"
 	"io"
+	"net/http"
 )
 
 type jsonWrapper struct{}
@@ -11,10 +12,76 @@ func (self jsonWrapper) Send(writer io.Writer, v interface{}) (n int, err error)
 	var payload []byte
 	payload, err = json.Marshal(v)
 	if err != nil {
+		jsonlogger.Fatalln("Error marshalling JSON", err)
 		return 0, err
 	}
+	jsonlogger.Infof("Sending payload: %s", payload)
 
 	return writer.Write(payload)
 }
 
+func (self jsonWrapper) ParseRequestBody(req *http.Request) (RpcRequest, error) {
+	var reqParsed RpcRequest
+
+	// Convert JSON to native types
+	d := json.NewDecoder(req.Body)
+	// d.UseNumber()
+	defer req.Body.Close()
+	err := d.Decode(&reqParsed)
+
+	if err != nil {
+		jsonlogger.Errorln("Error decoding JSON: ", err)
+		return reqParsed, err
+	}
+	jsonlogger.DebugDetailf("Parsed request: %s", reqParsed)
+
+	return reqParsed, nil
+}
+
+func (self jsonWrapper) GetRequestReply(xeth *EthereumApi, req *RpcRequest, reply *interface{}) error {
+	// call function for request method
+	jsonlogger.DebugDetailf("%T %s", req.Params, req.Params)
+	switch req.Method {
+	case "eth_coinbase":
+		return xeth.GetCoinbase(reply)
+	case "eth_listening":
+		return xeth.GetIsListening(reply)
+	case "eth_mining":
+		return xeth.GetIsMining(reply)
+	case "eth_peerCount":
+		return xeth.GetPeerCount(reply)
+	case "eth_countAt":
+		args, err := req.ToGetTxCountArgs()
+		if err != nil {
+			return err
+		}
+		return xeth.GetTxCountAt(args, reply)
+	// case "eth_codeAt":
+	// return nil
+	case "eth_balanceAt":
+		args, err := req.ToGetBalanceArgs()
+		if err != nil {
+			return err
+		}
+		return xeth.GetBalanceAt(args, reply)
+	case "eth_stateAt":
+		args, err := req.ToGetStorageArgs()
+		if err != nil {
+			return err
+		}
+		return xeth.GetStorageAt(args, reply)
+	case "eth_blockByNumber", "eth_blockByHash":
+		args, err := req.ToGetBlockArgs()
+		if err != nil {
+			return err
+		}
+		return xeth.GetBlock(args, reply)
+	default:
+		return NewErrorResponse(ErrorNotImplemented)
+	}
+
+	jsonlogger.DebugDetailf("Reply: %T %s", reply, reply)
+	return nil
+}
+
 var JSON jsonWrapper