upload_file.go

package event

// Author j
import (
	"context"
	"encoding/json"
	"math"
	"math/rand"
	"net/http"
	"strconv"
	"strings"
	"time"

	"github.com/pkg/errors"
	"google.golang.org/protobuf/proto"

	"github.com/stratosnet/sds/framework/client/cf"
	"github.com/stratosnet/sds/framework/core"
	"github.com/stratosnet/sds/framework/crypto"
	"github.com/stratosnet/sds/framework/crypto/encryption"
	"github.com/stratosnet/sds/framework/crypto/encryption/hdkey"
	"github.com/stratosnet/sds/framework/msg/header"
	fwtypes "github.com/stratosnet/sds/framework/types"
	"github.com/stratosnet/sds/framework/utils"
	"github.com/stratosnet/sds/pp"
	"github.com/stratosnet/sds/pp/api/rpc"
	"github.com/stratosnet/sds/pp/file"
	"github.com/stratosnet/sds/pp/metrics"
	"github.com/stratosnet/sds/pp/p2pserver"
	"github.com/stratosnet/sds/pp/requests"
	"github.com/stratosnet/sds/pp/setting"
	"github.com/stratosnet/sds/pp/task"
	"github.com/stratosnet/sds/sds-msg/protos"
)

var (
	isCover bool
)

// RequestUploadFile request to SP for upload file
func RequestUploadFile(ctx context.Context, path string, isEncrypted, isVideoStream bool, desiredTier uint32, allowHigherTier bool,
	walletAddr string, walletPubkey, wsign []byte) {
	pp.DebugLog(ctx, "______________path", path)
	if !setting.CheckLogin() {
		return
	}

	isFile, err := file.IsFile(path)
	if err != nil {
		pp.ErrorLog(ctx, err)
		return
	}
	if !isFile {
		pp.ErrorLog(ctx, "the provided path indicates a directory, not a file")
		return
	}
	encryptionTag := ""
	if isEncrypted {
		encryptionTag = utils.GetRandomString(8)
	}
	uploadFileHandler := GetUploadFileHandler(isVideoStream)
	fileInfo, slices, err := uploadFileHandler.PreUpload(ctx, path, encryptionTag)
	if err != nil {
		pp.ErrorLog(ctx, "failed to slice file before upload ", err)
		return
	}

	reqTime := time.Now().Unix()
	p := requests.RequestUploadFileData(ctx, fileInfo, slices, desiredTier, allowHigherTier, walletAddr, walletPubkey, wsign, reqTime)
	if err = ReqGetWalletOzForUpload(ctx, setting.WalletAddress, task.LOCAL_REQID, p); err != nil {
		pp.ErrorLog(ctx, err)
	}
}

func ScheduleReqBackupStatus(ctx context.Context, fileHash string) {
	time.AfterFunc(5*time.Minute, func() {
		ReqBackupStatus(ctx, fileHash)
	})
}

func ReqBackupStatus(ctx context.Context, fileHash string) {
	p := &protos.ReqBackupStatus{
		FileHash: fileHash,
		Address:  p2pserver.GetP2pServer(ctx).GetPPInfo(),
	}
	p2pserver.GetP2pServer(ctx).SendMessageToSPServer(ctx, p, header.ReqFileBackupStatus)
}

// RspUploadFile response of upload file event, SP -> upgrader, upgrader -> dest PP
func RspUploadFile(ctx context.Context, _ core.WriteCloser) {
	pp.DebugLog(ctx, "get rspUploadFile")
	target := &protos.RspUploadFile{}
	if err := VerifyMessage(ctx, header.RspUploadFile, target); err != nil {
		utils.ErrorLog("failed verifying the message, ", err.Error())
		return
	}
	if !requests.UnmarshalData(ctx, target) {
		pp.ErrorLog(ctx, "unmarshal error")
		return
	}

	metrics.UploadPerformanceLogNow(target.FileHash + ":RCV_RSP_UPLOAD_SP")

	// SPAM check
	if time.Now().Unix()-target.TimeStamp > setting.SpamThresholdSpSignLatency {
		pp.ErrorLog(ctx, "sp's upload file response was expired")
		return
	}

	// upload file to PP based on the PP info provided by SP
	if target.Result == nil {
		pp.ErrorLog(ctx, "target.Result is nil")
		return
	}

	if target.Result.State != protos.ResultState_RES_SUCCESS {
		if strings.Contains(target.Result.Msg, "Same file with the name") {
			pp.ErrorLog(ctx, target.Result.Msg)
		} else {
			pp.ErrorLog(ctx, "upload failed: ", target.Result.Msg)
		}

		if file.IsFileRpcRemote(target.FileHash) {
			_ = file.SetRemoteFileResult(target.FileHash, rpc.Result{Return: target.Result.Msg})
		} else {
			file.ClearFileMap(target.FileHash)
		}
		return
	}

	task.UploadTaskIdMap.Store(target.FileHash, target.TaskId)

	if len(target.Slices) != 0 {
		// create the upload file task
		uploadTask := task.CreateUploadFileTask(target, uploadTaskHelper)
		p2pserver.GetP2pServer(ctx).CleanUpConnMap(target.FileHash)
		task.UploadFileTaskMap.Store(target.FileHash, uploadTask)

		go startUploadTask(ctx, target.FileHash, uploadTask)
	} else {
		pp.Log(ctx, "file upload successful！  fileHash", target.FileHash)
		//var p float32 = 100
		//ProgressMap.Store(target.FileHash, p)
		task.UploadProgressMap.Delete(target.FileHash)
	}

	// tell the rpc client, uploading to sds network has successfully started.
	if file.IsFileRpcRemote(target.FileHash) {
		_ = file.SetRemoteFileResult(target.FileHash, rpc.Result{Return: rpc.SUCCESS})
	}

	if isCover {
		pp.DebugLog(ctx, "is_cover")
	}
}

func RspBackupStatus(ctx context.Context, _ core.WriteCloser) {
	pp.DebugLog(ctx, "get RspBackupStatus")
	target := &protos.RspBackupStatus{}
	if err := VerifyMessage(ctx, header.RspFileBackupStatus, target); err != nil {
		utils.ErrorLog("failed verifying the message, ", err.Error())
		return
	}
	if !requests.UnmarshalData(ctx, target) {
		pp.ErrorLog(ctx, "unmarshal error")
		return
	}

	// SPAM check
	if time.Now().Unix()-target.TimeStamp > setting.SpamThresholdSpSignLatency {
		pp.ErrorLog(ctx, "sp's backup file response was expired,", time.Now().Unix(), ",", target.TimeStamp)
		return
	}

	spP2pPubkey, err := requests.GetSpPubkey(target.SpP2PAddress)
	if err != nil {
		pp.ErrorLog(ctx, "failed to get sp pubkey")
		return
	}

	// verify sp address
	if !fwtypes.VerifyP2pAddrBytes(spP2pPubkey.Bytes(), target.SpP2PAddress) {
		pp.ErrorLog(ctx, "failed verifying sp's p2p address")
		return
	}

	if target.Result.State == protos.ResultState_RES_FAIL {
		pp.Log(ctx, "Backup status check failed", target.Result.Msg)
		return
	}

	pp.Logf(ctx, "Backup status for file %s: current_replica is %d, desired_replica is %d, ongoing_backups is %d, delete_origin is %v, need_reupload is %v",
		target.FileHash, target.Replicas, target.DesiredReplicas, target.OngoingBackups,
		strconv.FormatBool(target.DeleteOriginTmp), strconv.FormatBool(target.NeedReupload))
	if target.DeleteOriginTmp {
		pp.Logf(ctx, "Backup is finished for file %s, delete all the temporary slices", target.FileHash)
		file.DeleteTmpFileSlices(ctx, target.FileHash)
		return
	}

	if target.NeedReupload {
		pp.Logf(ctx, "No available replicas remains for the file %s, re-upload it if you still want to use it, "+
			"please be kindly noted that you won't be charged for re-uploading this file", target.FileHash)
		return
	}
	pp.Logf(ctx, "No need to re-upload slices for the file  %s", target.FileHash)
}

func startUploadTask(ctx context.Context, fileHash string, uploadTask *task.UploadFileTask) {
	uploadTaskHelper(ctx, fileHash)
	uploadTask.SetScheduledJob(func() { uploadTaskHelper(ctx, fileHash) })
}

func uploadResult(ctx context.Context, filehash string, err error) {
	pp.Log(ctx, "******************************************************")
	if errors.Is(err, task.UploadFinished) {
		pp.Log(ctx, "* File ", filehash)
		pp.Log(ctx, "* has been sent to destinations")
	}

	if errors.Is(err, task.UploadErrMaxRetries) {
		pp.Log(ctx, "* The task to upload file ", filehash)
		pp.Log(ctx, "* has failed, tried too many times")
	}

	if errors.Is(err, task.UploadErrFatalError) {
		pp.Log(ctx, "* The task to upload file ", filehash)
		pp.Log(ctx, "* has failed, fatal error occurred")
	}

	if errors.Is(err, task.UploadErrNoUploadTask) {
		pp.Log(ctx, "* Upload task to upload file ", filehash)
		pp.Log(ctx, "* has failed, can't find the task")
	}

	pp.Log(ctx, "******************************************************")
}

func uploadTaskHelper(ctx context.Context, fileHash string) {
	err := uploadTaskHandler(ctx, fileHash)
	if err != nil {
		uploadResult(ctx, fileHash, err)
	}
	if errors.Is(err, task.UploadErrMaxRetries) || errors.Is(err, task.UploadFinished) || errors.Is(err, task.UploadErrFatalError) {
		task.StopRepeatedUploadTaskJob(fileHash)
		task.UploadFileTaskMap.Delete(fileHash)
		return
	}
	if errors.Is(err, task.UploadErrNoUploadTask) {
		task.StopRepeatedUploadTaskJob(fileHash)
		return
	}
}

func uploadTaskHandler(ctx context.Context, fileHash string) error {
	value, ok := task.UploadFileTaskMap.Load(fileHash)
	if !ok {
		utils.DebugLog("upload task for file", fileHash, "failed, can't find the task data")
		return task.UploadErrNoUploadTask
	}
	uploadTask := value.(*task.UploadFileTask)
	// trigger retry
	if time.Since(uploadTask.GetLastTouch()) > task.UPLOAD_WAIT_TIMEOUT*time.Second {
		utils.DebugLog("upload wait timeout")
		slicesToReUpload, _ := uploadTask.SliceFailuresToReport()
		if len(slicesToReUpload) > 0 {
			uploadTask.Touch()
			uploadTask.UpdateRetryCount()
			if !uploadTask.CanRetry() {
				utils.DebugLog("upload task for file", fileHash, "failed, retried too many times.")
				return task.UploadErrMaxRetries
			}
			if uploadTask.GetState() == task.STATE_DONE {
				uploadTask.SetState(task.STATE_PAUSED)
			}
			uploadTask.Pause()
			utils.DebugLog("request upload retry", len(slicesToReUpload), "slices")
		}
	}

	if uploadTask.GetState() == task.STATE_PAUSED {
		uploadTask.SetState(task.STATE_NOT_STARTED)
		uploadTask.Continue()
		slicesToReUpload, failedSlices := uploadTask.SliceFailuresToReport()
		p2pserver.GetP2pServer(ctx).SendMessageToSPServer(ctx, requests.ReqUploadSlicesWrong(ctx, uploadTask, slicesToReUpload, failedSlices), header.ReqUploadSlicesWrong)
		return nil
	}

	if uploadTask.IsFinished() {
		utils.DebugLog("upload task for file", fileHash, "finished")
		return task.UploadFinished
	}

	if err := uploadTask.IsFatal(); err != nil {
		utils.DebugLog("upload task for file", fileHash, "failed", err.Error())
		return task.UploadErrFatalError
	}

	// Start uploading to next destination
	uploadTask.UploadToDestination(ctx, UploadFileSlice)
	return nil
}

func UploadPause(ctx context.Context, fileHash, reqID string, w http.ResponseWriter) {
	p2pserver.GetP2pServer(ctx).RangeCachedConn("upload#"+fileHash, func(k, v interface{}) bool {
		conn := v.(*cf.ClientConn)
		conn.ClientClose(true)
		pp.DebugLog(ctx, "UploadPause", conn)
		return true
	})
	p2pserver.GetP2pServer(ctx).CleanUpConnMap(fileHash)
	task.UploadFileTaskMap.Delete(fileHash)
	task.UploadProgressMap.Delete(fileHash)
}

func encryptSliceData(rawData []byte) ([]byte, error) {
	hdKeyNonce := rand.Uint32()
	if hdKeyNonce > hdkey.HardenedKeyStart {
		hdKeyNonce -= hdkey.HardenedKeyStart
	}
	aesNonce := rand.Uint64()

	key, err := hdkey.MasterKeyForSliceEncryption(setting.WalletPrivateKey.Bytes(), hdKeyNonce)
	if err != nil {
		return nil, err
	}

	encryptedData, err := encryption.EncryptAES(key.PrivateKey(), rawData, aesNonce)
	if err != nil {
		return nil, err
	}

	encryptedSlice := &protos.EncryptedSlice{
		HdkeyNonce: hdKeyNonce,
		AesNonce:   aesNonce,
		Data:       encryptedData,
		RawSize:    uint64(len(rawData)),
	}
	return proto.Marshal(encryptedSlice)
}

func GetUploadFileHandler(isVideoStream bool) UploadFileHandler {
	if isVideoStream {
		return UploadStreamFileHandler{}
	}
	return UploadRawFileHandler{}
}

type UploadFileHandler interface {
	PreUpload(ctx context.Context, filePath, encryptionTag string) (*protos.FileInfo, []*protos.SliceHashAddr, error)
}

type UploadStreamFileHandler struct {
}

type UploadRawFileHandler struct {
}

func (UploadStreamFileHandler) PreUpload(ctx context.Context, filePath, encryptionTag string) (*protos.FileInfo, []*protos.SliceHashAddr, error) {
	info, err := file.GetFileInfo(filePath)
	if err != nil {
		pp.ErrorLog(ctx, "wrong filePath", err.Error())
		return nil, nil, err
	}

	duration, err := file.GetVideoDuration(filePath)
	if err != nil {
		pp.ErrorLog(ctx, "Failed to get the length of the video: ", err)
		return nil, nil, err
	}

	fileName := info.Name()
	fileSize := uint64(info.Size())
	fileHash := file.GetFileHashForVideoStream(filePath, encryptionTag)

	videoSegmentNum := math.Sqrt(10*math.Max(1, float64(fileSize)/float64(setting.DefaultSliceBlockSize)) - 9)
	sliceDuration := math.Ceil(float64(duration) / videoSegmentNum)
	sliceCount := uint64(math.Ceil(float64(duration)/sliceDuration)) + setting.DefaultHlsSegmentBuffer + 1

	file.VideoToHls(ctx, fileHash, file.GetFilePath(fileHash), int(sliceDuration))

	hlsInfo, err := file.GetHlsInfo(fileHash, sliceCount)
	if err != nil {
		pp.ErrorLog(ctx, "Hls transformation failed: ", err)
		return nil, nil, err
	}
	videoFolder := file.GetVideoTmpFolder(fileHash)

	var totalSize int64
	var slices []*protos.SliceHashAddr
	for sliceNumber := uint64(1); sliceNumber <= sliceCount; sliceNumber++ {
		var rawData []byte
		var sliceSize int64
		if sliceNumber == 1 {
			jsonStr, _ := json.Marshal(hlsInfo)
			rawData = jsonStr
			sliceSize = int64(len(rawData))
		} else if sliceNumber < hlsInfo.StartSliceNumber {
			rawData = file.GetDumpySliceData(fileHash, sliceNumber)
			sliceSize = int64(len(rawData))
		} else {
			sliceName := hlsInfo.SliceToSegment[sliceNumber]
			slicePath := videoFolder + "/" + sliceName
			fileInfo, err := file.GetFileInfo(slicePath)
			if err != nil {
				return nil, nil, errors.New("wrong file path")
			}
			rawData, err = file.GetWholeFileData(slicePath)
			if err != nil {
				return nil, nil, errors.New("failed getting whole file data")
			}
			sliceSize = fileInfo.Size()
		}

		data := rawData
		if encryptionTag != "" {
			data, err = encryptSliceData(rawData)
			if err != nil {
				return nil, nil, errors.Wrap(err, "Couldn't encrypt slice data")
			}
		}
		sliceHash, err := crypto.CalcSliceHash(data, fileHash, sliceNumber)
		if err != nil {
			return nil, nil, errors.Wrap(err, "failed to calc slice hash")
		}

		err = file.SaveTmpSliceData(fileHash, sliceHash, data)
		if err != nil {
			return nil, nil, errors.Wrap(err, "failed to save to temp file")
		}

		slice := &protos.SliceHashAddr{
			SliceHash:   sliceHash,
			SliceNumber: sliceNumber,
			SliceSize:   uint64(sliceSize),
			SliceOffset: &protos.SliceOffset{
				SliceOffsetStart: 0,
				SliceOffsetEnd:   uint64(sliceSize),
			},
		}
		slices = append(slices, slice)
		totalSize += sliceSize
		err = file.SaveTmpSliceData(fileHash, sliceHash, data)
		if err != nil {
			return nil, nil, err
		}
	}
	file.DeleteTmpHlsFolder(ctx, fileHash)
	fileInfo := &protos.FileInfo{
		FileSize:           uint64(totalSize),
		FileName:           fileName,
		FileHash:           fileHash,
		StoragePath:        filePath,
		EncryptionTag:      encryptionTag,
		Duration:           duration,
		OwnerWalletAddress: setting.WalletAddress,
	}

	return fileInfo, slices, nil
}

func (UploadRawFileHandler) PreUpload(ctx context.Context, filePath, encryptionTag string) (*protos.FileInfo, []*protos.SliceHashAddr, error) {
	info, err := file.GetFileInfo(filePath)
	if err != nil {
		pp.ErrorLog(ctx, "wrong filePath", err.Error())
		return nil, nil, err
	}
	fileName := info.Name()
	fileSize := uint64(info.Size())
	fileHash := file.GetFileHash(filePath, encryptionTag)
	sliceSize := uint64(setting.DefaultSliceBlockSize)
	sliceCount := uint64(math.Ceil(float64(info.Size()) / float64(sliceSize)))

	metrics.UploadPerformanceLogNow(fileHash + ":RCV_CMD_START:")

	var slices []*protos.SliceHashAddr
	for sliceNumber := uint64(1); sliceNumber <= sliceCount; sliceNumber++ {
		sliceOffset := requests.GetSliceOffset(sliceNumber, sliceCount, sliceSize, fileSize)

		rawData, err := file.GetFileData(filePath, sliceOffset)
		if err != nil {
			return nil, nil, errors.New("Failed reading data from file")

		}

		// Encrypt slice data if required
		data := rawData
		if encryptionTag != "" {
			data, err = encryptSliceData(rawData)
			if err != nil {
				return nil, nil, errors.Wrap(err, "Couldn't encrypt slice data")
			}
		}
		sliceHash, err := crypto.CalcSliceHash(data, fileHash, sliceNumber)
		if err != nil {
			return nil, nil, errors.Wrap(err, "failed to calc slice hash")
		}
		err = file.SaveTmpSliceData(fileHash, sliceHash, data)
		if err != nil {
			return nil, nil, errors.Wrap(err, "failed to save to temp file")
		}

		SliceHashAddr := &protos.SliceHashAddr{
			SliceHash:   sliceHash,
			SliceSize:   sliceOffset.SliceOffsetEnd - sliceOffset.SliceOffsetStart,
			SliceNumber: sliceNumber,
			SliceOffset: sliceOffset,
		}

		slices = append(slices, SliceHashAddr)
	}

	fileInfo := &protos.FileInfo{
		FileSize:           uint64(info.Size()),
		FileName:           fileName,
		FileHash:           fileHash,
		StoragePath:        filePath,
		EncryptionTag:      encryptionTag,
		OwnerWalletAddress: setting.WalletAddress,
	}

	return fileInfo, slices, nil
}