You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
261 lines
7.1 KiB
261 lines
7.1 KiB
package main
|
|
|
|
// A note on the origin of the name.
|
|
// http://en.wikipedia.org/wiki/Barak
|
|
// TODO: Nonrepudiable command log
|
|
|
|
import (
|
|
"errors"
|
|
"flag"
|
|
"fmt"
|
|
"io"
|
|
"net/http"
|
|
"os"
|
|
"reflect"
|
|
"time"
|
|
|
|
"github.com/tendermint/tendermint/binary"
|
|
. "github.com/tendermint/tendermint/cmd/barak/types"
|
|
. "github.com/tendermint/tendermint/common"
|
|
cfg "github.com/tendermint/tendermint/config"
|
|
pcm "github.com/tendermint/tendermint/process"
|
|
"github.com/tendermint/tendermint/rpc/server"
|
|
)
|
|
|
|
var Routes map[string]*rpcserver.RPCFunc
|
|
|
|
func init() {
|
|
Routes = map[string]*rpcserver.RPCFunc{
|
|
"status": rpcserver.NewRPCFunc(Status, []string{}),
|
|
"run": rpcserver.NewRPCFunc(Run, []string{"auth_command"}),
|
|
// NOTE: also, two special non-JSONRPC routes called "download" and "upload"
|
|
}
|
|
}
|
|
|
|
// Global instance
|
|
var barak_ *Barak
|
|
|
|
// Parse command-line options
|
|
func parseFlags() (optionsFile string) {
|
|
flag.StringVar(&optionsFile, "options-file", "", "Read options from file instead of stdin")
|
|
flag.Parse()
|
|
return
|
|
}
|
|
|
|
func main() {
|
|
fmt.Printf("New Barak Process (PID: %d)\n", os.Getpid())
|
|
|
|
// Apply bare tendermint/* configuration.
|
|
cfg.ApplyConfig(cfg.MapConfig(map[string]interface{}{"log_level": "info"}))
|
|
|
|
// Read options
|
|
optionsFile := parseFlags()
|
|
options := ReadBarakOptions(optionsFile)
|
|
|
|
// Init barak
|
|
barak_ = NewBarakFromOptions(options)
|
|
barak_.StartRegisterRoutine()
|
|
barak_.WritePidFile() // This should be last, before TrapSignal().
|
|
TrapSignal(func() {
|
|
fmt.Println("Barak shutting down")
|
|
})
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// RPC functions
|
|
|
|
func Status() (*ResponseStatus, error) {
|
|
barak_.mtx.Lock()
|
|
pid := barak_.pid
|
|
nonce := barak_.nonce
|
|
validators := barak_.validators
|
|
barak_.mtx.Unlock()
|
|
|
|
return &ResponseStatus{
|
|
Pid: pid,
|
|
Nonce: nonce,
|
|
Validators: validators,
|
|
}, nil
|
|
}
|
|
|
|
func Run(authCommand AuthCommand) (interface{}, error) {
|
|
command, err := parseValidateCommand(authCommand)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
log.Info(Fmt("Run() received command %v:\n%v", reflect.TypeOf(command), command))
|
|
// Issue command
|
|
switch c := command.(type) {
|
|
case CommandStartProcess:
|
|
return StartProcess(c.Wait, c.Label, c.ExecPath, c.Args, c.Input)
|
|
case CommandStopProcess:
|
|
return StopProcess(c.Label, c.Kill)
|
|
case CommandListProcesses:
|
|
return ListProcesses()
|
|
case CommandOpenListener:
|
|
return OpenListener(c.Addr)
|
|
case CommandCloseListener:
|
|
return CloseListener(c.Addr)
|
|
default:
|
|
return nil, errors.New("Invalid endpoint for command")
|
|
}
|
|
}
|
|
|
|
func parseValidateCommandStr(authCommandStr string) (Command, error) {
|
|
var err error
|
|
authCommand := binary.ReadJSON(AuthCommand{}, []byte(authCommandStr), &err).(AuthCommand)
|
|
if err != nil {
|
|
fmt.Printf("Failed to parse auth_command")
|
|
return nil, errors.New("AuthCommand parse error")
|
|
}
|
|
return parseValidateCommand(authCommand)
|
|
}
|
|
|
|
func parseValidateCommand(authCommand AuthCommand) (Command, error) {
|
|
commandJSONStr := authCommand.CommandJSONStr
|
|
signatures := authCommand.Signatures
|
|
// Validate commandJSONStr
|
|
if !validate([]byte(commandJSONStr), barak_.ListValidators(), signatures) {
|
|
fmt.Printf("Failed validation attempt")
|
|
return nil, errors.New("Validation error")
|
|
}
|
|
// Parse command
|
|
var err error
|
|
command := binary.ReadJSON(NoncedCommand{}, []byte(commandJSONStr), &err).(NoncedCommand)
|
|
if err != nil {
|
|
fmt.Printf("Failed to parse command")
|
|
return nil, errors.New("Command parse error")
|
|
}
|
|
// Prevent replays
|
|
barak_.CheckIncrNonce(command.Nonce)
|
|
return command.Command, nil
|
|
}
|
|
|
|
//------------------------------------------------------------------------------
|
|
// RPC base commands
|
|
// WARNING Not validated, do not export to routes.
|
|
|
|
func StartProcess(wait bool, label string, execPath string, args []string, input string) (*ResponseStartProcess, error) {
|
|
// First, see if there already is a process labeled 'label'
|
|
existing := barak_.GetProcess(label)
|
|
if existing != nil && existing.EndTime.IsZero() {
|
|
return nil, fmt.Errorf("Process already exists: %v", label)
|
|
}
|
|
|
|
// Otherwise, create one.
|
|
err := EnsureDir(barak_.RootDir() + "/outputs")
|
|
if err != nil {
|
|
return nil, fmt.Errorf("Failed to create outputs dir: %v", err)
|
|
}
|
|
outPath := Fmt("%v/outputs/%v_%v.out", barak_.RootDir(), label, time.Now().Format("2006_01_02_15_04_05_MST"))
|
|
proc, err := pcm.Create(pcm.ProcessModeDaemon, label, execPath, args, input, outPath)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
barak_.AddProcess(label, proc)
|
|
|
|
if wait {
|
|
<-proc.WaitCh
|
|
output := pcm.ReadOutput(proc)
|
|
fmt.Println("Read output", output)
|
|
if proc.ExitState == nil {
|
|
return &ResponseStartProcess{
|
|
Success: true,
|
|
Output: output,
|
|
}, nil
|
|
} else {
|
|
return &ResponseStartProcess{
|
|
Success: proc.ExitState.Success(), // Would be always false?
|
|
Output: output,
|
|
}, nil
|
|
}
|
|
} else {
|
|
return &ResponseStartProcess{
|
|
Success: true,
|
|
Output: "",
|
|
}, nil
|
|
}
|
|
}
|
|
|
|
func StopProcess(label string, kill bool) (*ResponseStopProcess, error) {
|
|
err := barak_.StopProcess(label, kill)
|
|
return &ResponseStopProcess{}, err
|
|
}
|
|
|
|
func ListProcesses() (*ResponseListProcesses, error) {
|
|
procs := barak_.ListProcesses()
|
|
return &ResponseListProcesses{
|
|
Processes: procs,
|
|
}, nil
|
|
}
|
|
|
|
func OpenListener(addr string) (*ResponseOpenListener, error) {
|
|
listener, err := barak_.OpenListener(addr)
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
return &ResponseOpenListener{
|
|
Addr: listener.Addr().String(),
|
|
}, nil
|
|
}
|
|
|
|
func CloseListener(addr string) (*ResponseCloseListener, error) {
|
|
barak_.CloseListener(addr)
|
|
return &ResponseCloseListener{}, nil
|
|
}
|
|
|
|
//--------------------------------------------------------------------------------
|
|
|
|
// Another barak instance registering its external
|
|
// address to a remote barak.
|
|
func RegisterHandler(w http.ResponseWriter, req *http.Request) {
|
|
registry, err := os.OpenFile(barak_.RootDir()+"/registry.log", os.O_RDWR|os.O_APPEND|os.O_CREATE, 0600)
|
|
if err != nil {
|
|
http.Error(w, "Could not open registry file. Please contact the administrator", 500)
|
|
return
|
|
}
|
|
// TODO: Also check the X-FORWARDED-FOR or whatever it's called.
|
|
registry.Write([]byte(Fmt("++ %v\n", req.RemoteAddr)))
|
|
registry.Close()
|
|
w.Header().Set("Content-Type", "application/json")
|
|
w.WriteHeader(200)
|
|
w.Write([]byte("Noted!"))
|
|
}
|
|
|
|
func ServeFileHandler(w http.ResponseWriter, req *http.Request) {
|
|
authCommandStr := req.FormValue("auth_command")
|
|
command, err := parseValidateCommandStr(authCommandStr)
|
|
if err != nil {
|
|
http.Error(w, Fmt("Invalid command: %v", err), 400)
|
|
}
|
|
serveCommand, ok := command.(CommandServeFile)
|
|
if !ok {
|
|
http.Error(w, "Invalid command", 400)
|
|
}
|
|
path := serveCommand.Path
|
|
if path == "" {
|
|
http.Error(w, "Must specify path", 400)
|
|
return
|
|
}
|
|
if path[0] == '.' {
|
|
// local paths must be explicitly local, e.g. "./xyz"
|
|
} else if path[0] != '/' {
|
|
// If not an absolute path, then is label
|
|
proc := barak_.GetProcess(path)
|
|
if proc == nil {
|
|
http.Error(w, Fmt("Unknown process label: %v", path), 400)
|
|
return
|
|
}
|
|
path = proc.OutputPath
|
|
}
|
|
file, err := os.Open(path)
|
|
if err != nil {
|
|
http.Error(w, Fmt("Error opening file: %v. %v", path, err), 400)
|
|
return
|
|
}
|
|
_, err = io.Copy(w, file)
|
|
if err != nil {
|
|
fmt.Fprintf(os.Stderr, Fmt("Error serving file: %v. %v", path, err))
|
|
return
|
|
}
|
|
}
|