rpc: migrated the RPC insterface to a new reflection based RPC layer
This commit is contained in:
Bas van Kervel
committed by
Jeffrey Wilcke
Jeffrey Wilcke
parent
f2ab351e8d
commit
19b2640e89
323
cmd/utils/jeth.go
Normal file
323
cmd/utils/jeth.go
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@ -0,0 +1,323 @@
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// Copyright 2015 The go-ethereum Authors
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// This file is part of the go-ethereum library.
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//
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// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
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//
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// You should have received a copy of the GNU Lesser General Public License
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// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package utils
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import (
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"encoding/json"
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"fmt"
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"time"
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"github.com/ethereum/go-ethereum/jsre"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/robertkrimen/otto"
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)
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type Jeth struct {
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re *jsre.JSRE
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client rpc.Client
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}
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// NewJeth create a new backend for the JSRE console
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func NewJeth(re *jsre.JSRE, client rpc.Client) *Jeth {
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return &Jeth{re, client}
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}
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func (self *Jeth) err(call otto.FunctionCall, code int, msg string, id *int64) (response otto.Value) {
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m := rpc.JSONErrResponse{
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Version: "2.0",
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Id: id,
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Error: rpc.JSONError{
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Code: code,
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Message: msg,
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},
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}
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errObj, _ := json.Marshal(m.Error)
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errRes, _ := json.Marshal(m)
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call.Otto.Run("ret_error = " + string(errObj))
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res, _ := call.Otto.Run("ret_response = " + string(errRes))
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return res
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}
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// UnlockAccount asks the user for the password and than executes the jeth.UnlockAccount callback in the jsre
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func (self *Jeth) UnlockAccount(call otto.FunctionCall) (response otto.Value) {
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var cmd, account, passwd string
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timeout := int64(300)
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var ok bool
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if len(call.ArgumentList) == 0 {
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fmt.Println("expected address of account to unlock")
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return otto.FalseValue()
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}
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if len(call.ArgumentList) >= 1 {
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if accountExport, err := call.Argument(0).Export(); err == nil {
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if account, ok = accountExport.(string); ok {
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if len(call.ArgumentList) == 1 {
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fmt.Printf("Unlock account %s\n", account)
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passwd, err = PromptPassword("Passphrase: ", true)
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if err != nil {
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return otto.FalseValue()
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}
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}
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}
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}
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}
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if len(call.ArgumentList) >= 2 {
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if passwdExport, err := call.Argument(1).Export(); err == nil {
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passwd, _ = passwdExport.(string)
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}
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}
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if len(call.ArgumentList) >= 3 {
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if timeoutExport, err := call.Argument(2).Export(); err == nil {
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timeout, _ = timeoutExport.(int64)
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}
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}
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cmd = fmt.Sprintf("jeth.unlockAccount('%s', '%s', %d)", account, passwd, timeout)
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if val, err := call.Otto.Run(cmd); err == nil {
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return val
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}
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return otto.FalseValue()
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}
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// NewAccount asks the user for the password and than executes the jeth.newAccount callback in the jsre
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func (self *Jeth) NewAccount(call otto.FunctionCall) (response otto.Value) {
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if len(call.ArgumentList) == 0 {
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passwd, err := PromptPassword("Passphrase: ", true)
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if err != nil {
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return otto.FalseValue()
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}
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passwd2, err := PromptPassword("Repeat passphrase: ", true)
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if err != nil {
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return otto.FalseValue()
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}
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if passwd != passwd2 {
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fmt.Println("Passphrases don't match")
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return otto.FalseValue()
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}
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cmd := fmt.Sprintf("jeth.newAccount('%s')", passwd)
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if val, err := call.Otto.Run(cmd); err == nil {
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return val
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}
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} else {
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fmt.Println("New account doesn't expect argument(s), you will be prompted for a password")
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}
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return otto.FalseValue()
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}
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func (self *Jeth) Send(call otto.FunctionCall) (response otto.Value) {
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reqif, err := call.Argument(0).Export()
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if err != nil {
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return self.err(call, -32700, err.Error(), nil)
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}
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jsonreq, err := json.Marshal(reqif)
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var reqs []rpc.JSONRequest
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batch := true
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err = json.Unmarshal(jsonreq, &reqs)
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if err != nil {
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reqs = make([]rpc.JSONRequest, 1)
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err = json.Unmarshal(jsonreq, &reqs[0])
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batch = false
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}
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call.Otto.Set("response_len", len(reqs))
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call.Otto.Run("var ret_response = new Array(response_len);")
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for i, req := range reqs {
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err := self.client.Send(&req)
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if err != nil {
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return self.err(call, -32603, err.Error(), req.Id)
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}
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result := make(map[string]interface{})
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err = self.client.Recv(&result)
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if err != nil {
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return self.err(call, -32603, err.Error(), req.Id)
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}
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_, isSuccessResponse := result["result"]
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_, isErrorResponse := result["error"]
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if !isSuccessResponse && !isErrorResponse {
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return self.err(call, -32603, fmt.Sprintf("Invalid response"), new(int64))
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}
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id, _ := result["id"]
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call.Otto.Set("ret_id", id)
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jsonver, _ := result["jsonrpc"]
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call.Otto.Set("ret_jsonrpc", jsonver)
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var payload []byte
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if isSuccessResponse {
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payload, _ = json.Marshal(result["result"])
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} else if isErrorResponse {
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payload, _ = json.Marshal(result["error"])
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}
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call.Otto.Set("ret_result", string(payload))
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call.Otto.Set("response_idx", i)
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response, err = call.Otto.Run(`
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ret_response[response_idx] = { jsonrpc: ret_jsonrpc, id: ret_id, result: JSON.parse(ret_result) };
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`)
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}
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if !batch {
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call.Otto.Run("ret_response = ret_response[0];")
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}
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if call.Argument(1).IsObject() {
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call.Otto.Set("callback", call.Argument(1))
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call.Otto.Run(`
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if (Object.prototype.toString.call(callback) == '[object Function]') {
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callback(null, ret_response);
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}
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`)
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}
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return
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}
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/*
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// handleRequest will handle user agent requests by interacting with the user and sending
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// the user response back to the geth service
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func (self *Jeth) handleRequest(req *shared.Request) bool {
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var err error
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var args []interface{}
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if err = json.Unmarshal(req.Params, &args); err != nil {
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glog.V(logger.Info).Infof("Unable to parse agent request - %v\n", err)
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return false
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}
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switch req.Method {
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case useragent.AskPasswordMethod:
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return self.askPassword(req.Id, req.Jsonrpc, args)
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case useragent.ConfirmTransactionMethod:
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return self.confirmTransaction(req.Id, req.Jsonrpc, args)
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}
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return false
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}
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// askPassword will ask the user to supply the password for a given account
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func (self *Jeth) askPassword(id interface{}, jsonrpc string, args []interface{}) bool {
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var err error
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var passwd string
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if len(args) >= 1 {
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if account, ok := args[0].(string); ok {
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fmt.Printf("Unlock account %s\n", account)
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} else {
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return false
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}
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}
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passwd, err = PromptPassword("Passphrase: ", true)
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if err = self.client.Send(shared.NewRpcResponse(id, jsonrpc, passwd, err)); err != nil {
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glog.V(logger.Info).Infof("Unable to send user agent ask password response - %v\n", err)
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}
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return err == nil
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}
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func (self *Jeth) confirmTransaction(id interface{}, jsonrpc string, args []interface{}) bool {
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// Accept all tx which are send from this console
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return self.client.Send(shared.NewRpcResponse(id, jsonrpc, true, nil)) == nil
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}
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*/
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// throwJSExeception panics on an otto value, the Otto VM will then throw msg as a javascript error.
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func throwJSExeception(msg interface{}) otto.Value {
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p, _ := otto.ToValue(msg)
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panic(p)
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return p
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}
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// Sleep will halt the console for arg[0] seconds.
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func (self *Jeth) Sleep(call otto.FunctionCall) (response otto.Value) {
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if len(call.ArgumentList) >= 1 {
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if call.Argument(0).IsNumber() {
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sleep, _ := call.Argument(0).ToInteger()
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time.Sleep(time.Duration(sleep) * time.Second)
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return otto.TrueValue()
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}
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}
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return throwJSExeception("usage: sleep(<sleep in seconds>)")
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}
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// SleepBlocks will wait for a specified number of new blocks or max for a
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// given of seconds. sleepBlocks(nBlocks[, maxSleep]).
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func (self *Jeth) SleepBlocks(call otto.FunctionCall) (response otto.Value) {
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nBlocks := int64(0)
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maxSleep := int64(9999999999999999) // indefinitely
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nArgs := len(call.ArgumentList)
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if nArgs == 0 {
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throwJSExeception("usage: sleepBlocks(<n blocks>[, max sleep in seconds])")
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}
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if nArgs >= 1 {
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if call.Argument(0).IsNumber() {
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nBlocks, _ = call.Argument(0).ToInteger()
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} else {
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throwJSExeception("expected number as first argument")
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}
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}
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if nArgs >= 2 {
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if call.Argument(1).IsNumber() {
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maxSleep, _ = call.Argument(1).ToInteger()
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} else {
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throwJSExeception("expected number as second argument")
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}
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}
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// go through the console, this will allow web3 to call the appropriate
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// callbacks if a delayed response or notification is received.
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currentBlockNr := func() int64 {
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result, err := call.Otto.Run("eth.blockNumber")
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if err != nil {
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throwJSExeception(err.Error())
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}
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blockNr, err := result.ToInteger()
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if err != nil {
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throwJSExeception(err.Error())
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}
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return blockNr
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}
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targetBlockNr := currentBlockNr() + nBlocks
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deadline := time.Now().Add(time.Duration(maxSleep) * time.Second)
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for time.Now().Before(deadline) {
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if currentBlockNr() >= targetBlockNr {
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return otto.TrueValue()
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}
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time.Sleep(time.Second)
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}
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return otto.FalseValue()
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}
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