454 lines
11 KiB
Go
454 lines
11 KiB
Go
// Copyright (c) 2013-2014, Jeffrey Wilcke. All rights reserved.
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//
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// This library is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public
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// License as published by the Free Software Foundation; either
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// version 2.1 of the License, or (at your option) any later version.
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//
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// This 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 GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this library; if not, write to the Free Software
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// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
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// MA 02110-1301 USA
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package main
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import (
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"bufio"
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"fmt"
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"math/big"
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"os"
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"os/signal"
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"path/filepath"
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"strings"
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"encoding/json"
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"sort"
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"github.com/codegangsta/cli"
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"github.com/ethereum/go-ethereum/cmd/utils"
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"github.com/ethereum/go-ethereum/common/docserver"
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re "github.com/ethereum/go-ethereum/jsre"
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"github.com/ethereum/go-ethereum/rpc"
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"github.com/ethereum/go-ethereum/rpc/api"
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"github.com/ethereum/go-ethereum/rpc/codec"
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"github.com/ethereum/go-ethereum/rpc/comms"
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"github.com/ethereum/go-ethereum/rpc/shared"
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"github.com/peterh/liner"
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"github.com/robertkrimen/otto"
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)
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type prompter interface {
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AppendHistory(string)
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Prompt(p string) (string, error)
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PasswordPrompt(p string) (string, error)
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}
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type dumbterm struct{ r *bufio.Reader }
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func (r dumbterm) Prompt(p string) (string, error) {
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fmt.Print(p)
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line, err := r.r.ReadString('\n')
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return strings.TrimSuffix(line, "\n"), err
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}
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func (r dumbterm) PasswordPrompt(p string) (string, error) {
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fmt.Println("!! Unsupported terminal, password will echo.")
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fmt.Print(p)
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input, err := bufio.NewReader(os.Stdin).ReadString('\n')
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fmt.Println()
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return input, err
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}
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func (r dumbterm) AppendHistory(string) {}
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type jsre struct {
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re *re.JSRE
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wait chan *big.Int
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ps1 string
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atexit func()
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datadir string
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prompter
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}
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var (
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loadedModulesMethods map[string][]string
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)
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func loadAutoCompletion(js *jsre, ipcpath string) {
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modules, err := js.suportedApis(ipcpath)
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if err != nil {
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utils.Fatalf("Unable to determine supported modules - %v", err)
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}
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loadedModulesMethods = make(map[string][]string)
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for module, _ := range modules {
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loadedModulesMethods[module] = api.AutoCompletion[module]
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}
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}
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func keywordCompleter(line string) []string {
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results := make([]string, 0)
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if strings.Contains(line, ".") {
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elements := strings.Split(line, ".")
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if len(elements) == 2 {
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module := elements[0]
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partialMethod := elements[1]
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if methods, found := loadedModulesMethods[module]; found {
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for _, method := range methods {
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if strings.HasPrefix(method, partialMethod) { // e.g. debug.se
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results = append(results, module+"."+method)
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}
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}
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}
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}
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} else {
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for module, methods := range loadedModulesMethods {
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if line == module { // user typed in full module name, show all methods
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for _, method := range methods {
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results = append(results, module+"."+method)
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}
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} else if strings.HasPrefix(module, line) { // partial method name, e.g. admi
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results = append(results, module)
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}
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}
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}
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return results
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}
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func apiWordCompleter(line string, pos int) (head string, completions []string, tail string) {
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if len(line) == 0 {
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return "", nil, ""
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}
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i := 0
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for i = pos - 1; i > 0; i-- {
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if line[i] == '.' || (line[i] >= 'a' && line[i] <= 'z') || (line[i] >= 'A' && line[i] <= 'Z') {
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continue
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}
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if i >= 3 && line[i] == '3' && line[i-3] == 'w' && line[i-2] == 'e' && line[i-1] == 'b' {
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continue
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}
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i += 1
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break
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}
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begin := line[:i]
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keyword := line[i:pos]
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end := line[pos:]
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completionWords := keywordCompleter(keyword)
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return begin, completionWords, end
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}
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func newJSRE(libPath, ipcpath string) *jsre {
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js := &jsre{ps1: "> "}
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js.wait = make(chan *big.Int)
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// update state in separare forever blocks
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js.re = re.New(libPath)
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js.apiBindings(ipcpath)
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if !liner.TerminalSupported() {
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js.prompter = dumbterm{bufio.NewReader(os.Stdin)}
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} else {
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lr := liner.NewLiner()
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js.withHistory(func(hist *os.File) { lr.ReadHistory(hist) })
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lr.SetCtrlCAborts(true)
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loadAutoCompletion(js, ipcpath)
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lr.SetWordCompleter(apiWordCompleter)
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lr.SetTabCompletionStyle(liner.TabPrints)
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js.prompter = lr
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js.atexit = func() {
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js.withHistory(func(hist *os.File) { hist.Truncate(0); lr.WriteHistory(hist) })
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lr.Close()
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close(js.wait)
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}
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}
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return js
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}
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func (js *jsre) apiBindings(ipcpath string) {
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ethApi := rpc.NewEthereumApi(nil)
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jeth := rpc.NewJeth(ethApi, js.re, ipcpath)
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js.re.Set("jeth", struct{}{})
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t, _ := js.re.Get("jeth")
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jethObj := t.Object()
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jethObj.Set("send", jeth.SendIpc)
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jethObj.Set("sendAsync", jeth.SendIpc)
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err := js.re.Compile("bignumber.js", re.BigNumber_JS)
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if err != nil {
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utils.Fatalf("Error loading bignumber.js: %v", err)
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}
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err = js.re.Compile("ethereum.js", re.Web3_JS)
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if err != nil {
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utils.Fatalf("Error loading web3.js: %v", err)
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}
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_, err = js.re.Eval("var web3 = require('web3');")
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if err != nil {
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utils.Fatalf("Error requiring web3: %v", err)
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}
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_, err = js.re.Eval("web3.setProvider(jeth)")
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if err != nil {
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utils.Fatalf("Error setting web3 provider: %v", err)
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}
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apis, err := js.suportedApis(ipcpath)
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if err != nil {
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utils.Fatalf("Unable to determine supported api's: %v", err)
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}
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// load only supported API's in javascript runtime
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shortcuts := "var eth = web3.eth; "
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for apiName, _ := range apis {
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if apiName == api.Web3ApiName || apiName == api.EthApiName {
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continue // manually mapped
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}
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if err = js.re.Compile(fmt.Sprintf("%s.js", apiName), api.Javascript(apiName)); err == nil {
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shortcuts += fmt.Sprintf("var %s = web3.%s; ", apiName, apiName)
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} else {
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utils.Fatalf("Error loading %s.js: %v", apiName, err)
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}
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}
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_, err = js.re.Eval(shortcuts)
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if err != nil {
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utils.Fatalf("Error setting namespaces: %v", err)
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}
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js.re.Eval(globalRegistrar + "registrar = GlobalRegistrar.at(\"" + globalRegistrarAddr + "\");")
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}
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var ds, _ = docserver.New("/")
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/*
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func (self *jsre) ConfirmTransaction(tx string) bool {
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if self.ethereum.NatSpec {
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notice := natspec.GetNotice(self.xeth, tx, ds)
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fmt.Println(notice)
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answer, _ := self.Prompt("Confirm Transaction [y/n]")
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return strings.HasPrefix(strings.Trim(answer, " "), "y")
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} else {
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return true
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}
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}
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func (self *jsre) UnlockAccount(addr []byte) bool {
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fmt.Printf("Please unlock account %x.\n", addr)
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pass, err := self.PasswordPrompt("Passphrase: ")
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if err != nil {
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return false
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}
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// TODO: allow retry
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if err := self.ethereum.AccountManager().Unlock(common.BytesToAddress(addr), pass); err != nil {
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return false
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} else {
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fmt.Println("Account is now unlocked for this session.")
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return true
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}
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}
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*/
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func (self *jsre) exec(filename string) error {
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if err := self.re.Exec(filename); err != nil {
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self.re.Stop(false)
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return fmt.Errorf("Javascript Error: %v", err)
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}
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self.re.Stop(true)
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return nil
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}
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func (self *jsre) suportedApis(ipcpath string) (map[string]string, error) {
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config := comms.IpcConfig{
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Endpoint: ipcpath,
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}
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client, err := comms.NewIpcClient(config, codec.JSON)
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if err != nil {
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return nil, err
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}
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req := shared.Request{
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Id: 1,
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Jsonrpc: "2.0",
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Method: "modules",
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}
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err = client.Send(req)
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if err != nil {
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return nil, err
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}
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res, err := client.Recv()
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if err != nil {
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return nil, err
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}
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if sucRes, ok := res.(shared.SuccessResponse); ok {
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data, _ := json.Marshal(sucRes.Result)
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apis := make(map[string]string)
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err = json.Unmarshal(data, &apis)
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if err == nil {
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return apis, nil
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}
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}
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return nil, fmt.Errorf("Unable to determine supported API's")
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}
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// show summary of current geth instance
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func (self *jsre) welcome(ipcpath string) {
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self.re.Eval(`console.log('instance: ' + web3.version.client);`)
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self.re.Eval(`console.log(' datadir: ' + admin.datadir);`)
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self.re.Eval(`console.log("coinbase: " + eth.coinbase);`)
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self.re.Eval(`var lastBlockTimestamp = 1000 * eth.getBlock(eth.blockNumber).timestamp`)
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self.re.Eval(`console.log("at block: " + eth.blockNumber + " (" + new Date(lastBlockTimestamp).toLocaleDateString()
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+ " " + new Date(lastBlockTimestamp).toLocaleTimeString() + ")");`)
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if modules, err := self.suportedApis(ipcpath); err == nil {
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loadedModules := make([]string, 0)
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for api, version := range modules {
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loadedModules = append(loadedModules, fmt.Sprintf("%s:%s", api, version))
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}
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sort.Strings(loadedModules)
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self.re.Eval(fmt.Sprintf("var modules = '%s';", strings.Join(loadedModules, " ")))
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self.re.Eval(`console.log(" modules: " + modules);`)
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}
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}
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func (self *jsre) batch(args cli.Args) {
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statement := strings.Join(args, " ")
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val, err := self.re.Run(statement)
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if err != nil {
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fmt.Printf("error: %v", err)
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} else if val.IsDefined() {
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fmt.Printf("%v", val)
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}
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if self.atexit != nil {
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self.atexit()
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}
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self.re.Stop(false)
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}
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func (self *jsre) interactive(ipcpath string) {
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self.welcome(ipcpath)
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// Read input lines.
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prompt := make(chan string)
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inputln := make(chan string)
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go func() {
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defer close(inputln)
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for {
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line, err := self.Prompt(<-prompt)
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if err != nil {
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return
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}
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inputln <- line
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}
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}()
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// Wait for Ctrl-C, too.
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sig := make(chan os.Signal, 1)
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signal.Notify(sig, os.Interrupt)
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defer func() {
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if self.atexit != nil {
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self.atexit()
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}
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self.re.Stop(false)
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}()
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for {
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prompt <- self.ps1
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select {
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case <-sig:
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fmt.Println("caught interrupt, exiting")
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return
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case input, ok := <-inputln:
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if !ok || indentCount <= 0 && input == "exit" {
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return
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}
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if input == "" {
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continue
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}
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str += input + "\n"
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self.setIndent()
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if indentCount <= 0 {
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hist := str[:len(str)-1]
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self.AppendHistory(hist)
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self.parseInput(str)
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str = ""
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}
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}
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}
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}
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func (self *jsre) withHistory(op func(*os.File)) {
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hist, err := os.OpenFile(filepath.Join(self.datadir, "history"), os.O_RDWR|os.O_CREATE, os.ModePerm)
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if err != nil {
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fmt.Printf("unable to open history file: %v\n", err)
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return
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}
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op(hist)
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hist.Close()
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}
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func (self *jsre) parseInput(code string) {
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defer func() {
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if r := recover(); r != nil {
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fmt.Println("[native] error", r)
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}
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}()
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value, err := self.re.Run(code)
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if err != nil {
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if ottoErr, ok := err.(*otto.Error); ok {
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fmt.Println(ottoErr.String())
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} else {
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fmt.Println(err)
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}
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return
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}
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self.printValue(value)
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}
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var indentCount = 0
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var str = ""
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func (self *jsre) setIndent() {
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open := strings.Count(str, "{")
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open += strings.Count(str, "(")
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closed := strings.Count(str, "}")
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closed += strings.Count(str, ")")
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indentCount = open - closed
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if indentCount <= 0 {
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self.ps1 = "> "
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} else {
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self.ps1 = strings.Join(make([]string, indentCount*2), "..")
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self.ps1 += " "
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}
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}
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func (self *jsre) printValue(v interface{}) {
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val, err := self.re.PrettyPrint(v)
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if err == nil {
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fmt.Printf("%v", val)
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}
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}
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