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package rpc
import (
"encoding/json"
"fmt"
"reflect"
"github.com/ethereum/go-ethereum/jsre"
"github.com/ethereum/go-ethereum/rpc/codec"
"github.com/ethereum/go-ethereum/rpc/comms"
"github.com/ethereum/go-ethereum/rpc/shared"
"github.com/robertkrimen/otto"
)
type Jeth struct {
ethApi *EthereumApi
re *jsre.JSRE
ipcpath string
}
func NewJeth(ethApi *EthereumApi, re *jsre.JSRE, ipcpath string) *Jeth {
return &Jeth{ethApi, re, ipcpath}
}
func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id interface{}) (response otto.Value) {
rpcerr := &RpcErrorObject{code, msg}
call.Otto.Set("ret_jsonrpc", jsonrpcver)
call.Otto.Set("ret_id", id)
call.Otto.Set("ret_error", rpcerr)
response, _ = call.Otto.Run(`
ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error };
`)
return
}
func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
reqif, err := call.Argument(0).Export()
if err != nil {
return self.err(call, -32700, err.Error(), nil)
}
jsonreq, err := json.Marshal(reqif)
var reqs []RpcRequest
batch := true
err = json.Unmarshal(jsonreq, &reqs)
if err != nil {
reqs = make([]RpcRequest, 1)
err = json.Unmarshal(jsonreq, &reqs[0])
batch = false
}
call.Otto.Set("response_len", len(reqs))
call.Otto.Run("var ret_response = new Array(response_len);")
for i, req := range reqs {
var respif interface{}
err = self.ethApi.GetRequestReply(&req, &respif)
if err != nil {
fmt.Println("Error response:", err)
return self.err(call, -32603, err.Error(), req.Id)
}
call.Otto.Set("ret_jsonrpc", jsonrpcver)
call.Otto.Set("ret_id", req.Id)
res, _ := json.Marshal(respif)
call.Otto.Set("ret_result", string(res))
call.Otto.Set("response_idx", i)
response, err = call.Otto.Run(`
ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
`)
}
if !batch {
call.Otto.Run("ret_response = ret_response[0];")
}
if call.Argument(1).IsObject() {
call.Otto.Set("callback", call.Argument(1))
call.Otto.Run(`
if (Object.prototype.toString.call(callback) == '[object Function]') {
callback(null, ret_response);
}
`)
}
return
}
func (self *Jeth) SendIpc(call otto.FunctionCall) (response otto.Value) {
reqif, err := call.Argument(0).Export()
if err != nil {
return self.err(call, -32700, err.Error(), nil)
}
client, err := comms.NewIpcClient(comms.IpcConfig{self.ipcpath}, codec.JSON)
if err != nil {
fmt.Println("Unable to connect to geth.")
return self.err(call, -32603, err.Error(), -1)
}
defer client.Close()
jsonreq, err := json.Marshal(reqif)
var reqs []RpcRequest
batch := true
err = json.Unmarshal(jsonreq, &reqs)
if err != nil {
reqs = make([]RpcRequest, 1)
err = json.Unmarshal(jsonreq, &reqs[0])
batch = false
}
call.Otto.Set("response_len", len(reqs))
call.Otto.Run("var ret_response = new Array(response_len);")
for i, req := range reqs {
err := client.Send(&req)
if err != nil {
fmt.Println("Error send request:", err)
return self.err(call, -32603, err.Error(), req.Id)
}
respif, err := client.Recv()
if err != nil {
fmt.Println("Error recv response:", err)
return self.err(call, -32603, err.Error(), req.Id)
}
if res, ok := respif.(shared.SuccessResponse); ok {
call.Otto.Set("ret_id", res.Id)
call.Otto.Set("ret_jsonrpc", res.Jsonrpc)
resObj, _ := json.Marshal(res.Result)
call.Otto.Set("ret_result", string(resObj))
call.Otto.Set("response_idx", i)
response, err = call.Otto.Run(`
ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
`)
} else if res, ok := respif.(shared.ErrorResponse); ok {
fmt.Printf("Error: %s (%d)\n", res.Error.Message, res.Error.Code)
call.Otto.Set("ret_id", res.Id)
call.Otto.Set("ret_jsonrpc", res.Jsonrpc)
call.Otto.Set("ret_error", res.Error)
call.Otto.Set("response_idx", i)
response, _ = call.Otto.Run(`
ret_response = { jsonrpc: ret_jsonrpc, id: ret_id, error: ret_error };
`)
return
} else {
fmt.Printf("unexpected response\n", reflect.TypeOf(respif))
}
}
if !batch {
call.Otto.Run("ret_response = ret_response[0];")
}
if call.Argument(1).IsObject() {
call.Otto.Set("callback", call.Argument(1))
call.Otto.Run(`
if (Object.prototype.toString.call(callback) == '[object Function]') {
callback(null, ret_response);
}
`)
}
return
}
|
