Golang go-humanize.Bytes函數代碼示例

func (f *FetcherEnumerator) PrintStats() {
	var (
		start     = time.Now()
		then      = time.Now()
		lastStats stats
	)
	for _ = range time.Tick(10 * time.Second) {
		f.mu.Lock()
		now := time.Now()
		stats := f.stats
		f.mu.Unlock()

		elapsed := now.Sub(start)
		delta := uint64(now.Sub(then).Seconds())

		bytes := uint64(stats.bytes - lastStats.bytes)
		blobs := float64(stats.blobs - lastStats.blobs)
		hit := float64(stats.hit - lastStats.hit)
		miss := float64(stats.miss - lastStats.miss)

		fmt.Printf("%s: %s blobs (%s/sec); %s bytes (%s/sec); cache %[email protected]%.0f%% (cum %.0f%%)\n",
			elapsed,
			humanize.SI(float64(stats.blobs), ""), humanize.SI(blobs/float64(delta), ""),
			humanize.Bytes(stats.bytes), humanize.Bytes(bytes/uint64(delta)),
			humanize.SI(hit+miss, ""), 100*hit/(hit+miss),
			float64(100*stats.hit)/float64(stats.hit+stats.miss),
		)

		lastStats = stats
		then = now
	}
}

func main() {
	useSHA := flag.String("use-sha", "", "<default>=no hashing, 1=sha1, 256=sha256, 512=sha512, blake=blake2b")
	useBH := flag.Bool("use-bh", false, "whether we buzhash the bytes")
	flag.Parse()

	flag.Usage = func() {
		fmt.Printf("%s <big-file>\n", os.Args[0])
		flag.PrintDefaults()
		return
	}

	if len(flag.Args()) < 1 {
		flag.Usage()
		return
	}

	p := flag.Args()[0]
	bh := buzhash.NewBuzHash(64 * 8)
	f, _ := os.Open(p)
	defer f.Close()
	t0 := time.Now()
	buf := make([]byte, 4*1024)
	l := uint64(0)

	var h hash.Hash
	if *useSHA == "1" {
		h = sha1.New()
	} else if *useSHA == "256" {
		h = sha256.New()
	} else if *useSHA == "512" {
		h = sha512.New()
	} else if *useSHA == "blake" {
		h = blake2.NewBlake2B()
	}

	for {
		n, err := f.Read(buf)
		l += uint64(n)
		if err == io.EOF {
			break
		}
		s := buf[:n]
		if h != nil {
			h.Write(s)
		}
		if *useBH {
			bh.Write(s)
		}
	}

	t1 := time.Now()
	d := t1.Sub(t0)
	fmt.Printf("Read  %s in %s (%s/s)\n", humanize.Bytes(l), d, humanize.Bytes(uint64(float64(l)/d.Seconds())))
	digest := []byte{}
	if h != nil {
		fmt.Printf("%x\n", h.Sum(digest))
	}
}

func (m *Model) GetPinsStatusByFolder() map[string]string {
	result := make(map[string]string)

	m.fmut.RLock()
	defer m.fmut.RUnlock()

	for fldr, files := range m.pinnedFiles {
		pendingBytes := uint64(0)
		pendingFileCount := 0
		pinnedBytes := uint64(0)
		pinnedFileCount := 0
		fbc := m.blockCaches[fldr]
		tc := m.treeCaches[fldr]

		for _, file := range files {
			pending := false

			fileEntry, _ := tc.GetEntry(file)
			for _, block := range fileEntry.Blocks {
				if false == fbc.HasPinnedBlock(block.Hash) {
					pending = true
					pendingBytes += uint64(block.Size)
				} else {
					pinnedBytes += uint64(block.Size)
				}
			}

			if pending {
				pendingFileCount += 1
			} else {
				pinnedFileCount += 1
			}
		}

		if pendingFileCount > 0 {
			pendingByteComment := human.Bytes(pendingBytes)
			fileLabel := "files"
			if pendingFileCount == 1 {
				fileLabel = "file"
			}
			result[fldr] = fmt.Sprintf("%d %s (%s) pending", pendingFileCount, fileLabel, pendingByteComment)
		} else {
			if pinnedFileCount > 0 {
				pinnedByteComment := human.Bytes(pinnedBytes)
				fileLabel := "files"
				if pinnedFileCount == 1 {
					fileLabel = "file"
				}
				result[fldr] = fmt.Sprintf("%d %s (%s) pinned", pinnedFileCount, fileLabel, pinnedByteComment)
			}
		}
	}

	return result
}

func getStatusPrinter(expected uint64) progressreader.Callback {
	startTime := time.Now()
	return func(seen uint64) {
		percent := float64(seen) / float64(expected) * 100
		elapsed := time.Now().Sub(startTime)
		rate := float64(seen) / elapsed.Seconds()

		status.Printf("%.2f%% of %s (%s/s)...",
			percent,
			humanize.Bytes(expected),
			humanize.Bytes(uint64(rate)))
	}
}

func main() {
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "usage: %s <dataset> <file>\n", os.Args[0])
		flag.PrintDefaults()
	}

	spec.RegisterDatabaseFlags(flag.CommandLine)
	flag.Parse(true)

	if len(flag.Args()) != 2 {
		d.CheckError(errors.New("expected dataset and file flags"))
	}

	var blob types.Blob
	path := flag.Arg(0)
	if db, val, err := spec.GetPath(path); err != nil {
		d.CheckErrorNoUsage(err)
	} else if val == nil {
		d.CheckErrorNoUsage(fmt.Errorf("No value at %s", path))
	} else if b, ok := val.(types.Blob); !ok {
		d.CheckErrorNoUsage(fmt.Errorf("Value at %s is not a blob", path))
	} else {
		defer db.Close()
		blob = b
	}

	filePath := flag.Arg(1)
	if filePath == "" {
		d.CheckErrorNoUsage(errors.New("Empty file path"))
	}

	// Note: overwrites any existing file.
	file, err := os.OpenFile(filePath, os.O_WRONLY|os.O_CREATE, 0644)
	d.CheckErrorNoUsage(err)
	defer file.Close()

	expected := humanize.Bytes(blob.Len())
	start := time.Now()

	progReader := progressreader.New(blob.Reader(), func(seen uint64) {
		elapsed := time.Since(start).Seconds()
		rate := uint64(float64(seen) / elapsed)
		status.Printf("%s of %s written in %ds (%s/s)...", humanize.Bytes(seen), expected, int(elapsed), humanize.Bytes(rate))
	})

	io.Copy(file, progReader)
	status.Done()
}

func printStats() {
	statTimer := time.NewTicker(30 * time.Second)
	diskUsageWarning := false
	for {
		<-statTimer.C
		var memstats runtime.MemStats
		runtime.ReadMemStats(&memstats)
		log.Printf("stats [started: %s]\n", humanize.RelTime(time.Time{}, stratuxClock.Time, "ago", "from now"))
		log.Printf(" - Disk bytes used = %s (%.1f %%), Disk bytes free = %s (%.1f %%)\n", humanize.Bytes(usage.Used()), 100*usage.Usage(), humanize.Bytes(usage.Free()), 100*(1-usage.Usage()))
		log.Printf(" - CPUTemp=%.02f deg C, MemStats.Alloc=%s, MemStats.Sys=%s, totalNetworkMessagesSent=%s\n", globalStatus.CPUTemp, humanize.Bytes(uint64(memstats.Alloc)), humanize.Bytes(uint64(memstats.Sys)), humanize.Comma(int64(totalNetworkMessagesSent)))
		log.Printf(" - UAT/min %s/%s [maxSS=%.02f%%], ES/min %s/%s, Total traffic targets tracked=%s", humanize.Comma(int64(globalStatus.UAT_messages_last_minute)), humanize.Comma(int64(globalStatus.UAT_messages_max)), float64(maxSignalStrength)/10.0, humanize.Comma(int64(globalStatus.ES_messages_last_minute)), humanize.Comma(int64(globalStatus.ES_messages_max)), humanize.Comma(int64(len(seenTraffic))))
		log.Printf(" - Network data messages sent: %d total, %d nonqueueable.  Network data bytes sent: %d total, %d nonqueueable.\n", globalStatus.NetworkDataMessagesSent, globalStatus.NetworkDataMessagesSentNonqueueable, globalStatus.NetworkDataBytesSent, globalStatus.NetworkDataBytesSentNonqueueable)
		if globalSettings.GPS_Enabled {
			log.Printf(" - Last GPS fix: %s, GPS solution type: %d using %d satellites (%d/%d seen/tracked), NACp: %d, est accuracy %.02f m\n", stratuxClock.HumanizeTime(mySituation.LastFixLocalTime), mySituation.Quality, mySituation.Satellites, mySituation.SatellitesSeen, mySituation.SatellitesTracked, mySituation.NACp, mySituation.Accuracy)
			log.Printf(" - GPS vertical velocity: %.02f ft/sec; GPS vertical accuracy: %v m\n", mySituation.GPSVertVel, mySituation.AccuracyVert)
		}
		// Check if we're using more than 95% of the free space. If so, throw a warning (only once).
		if !diskUsageWarning && usage.Usage() > 95.0 {
			err_p := fmt.Errorf("Disk bytes used = %s (%.1f %%), Disk bytes free = %s (%.1f %%)", humanize.Bytes(usage.Used()), 100*usage.Usage(), humanize.Bytes(usage.Free()), 100*(1-usage.Usage()))
			addSystemError(err_p)
			diskUsageWarning = true
		}
		logStatus()
	}
}

func runSave(cmd *cobra.Command, args []string) (reterr error) {
	if len(args) == 0 {
		return errors.New("image reference missing")
	}

	output, err := cmd.Flags().GetString("output")
	if err != nil {
		return err
	}

	if output == "-" && terminal.IsTerminal(int(os.Stdout.Fd())) {
		return errors.New("refusing to output to terminal, specify output file")
	}

	client, err := engineapi.NewEnvClient()
	if err != nil {
		return err
	}

	ctx, cancel := context.WithCancel(context.Background())
	callOnSignal(ctx, cancel, syscall.SIGINT)
	defer cancel()

	graphdir, err := cmd.Flags().GetString("graph")
	if err != nil {
		return err
	}

	c, err := buildcache.New(client).Get(ctx, graphdir, args[0])
	if err != nil {
		return err
	}

	if output == "-" {
		_, err := io.Copy(os.Stdout, c)
		return err
	}

	f, err := ioutil.TempFile(filepath.Dir(output), ".buildcache-")
	if err != nil {
		return err
	}
	defer func() {
		if reterr != nil {
			os.RemoveAll(f.Name())
		}
	}()
	if n, err := io.Copy(f, c); err != nil {
		return err
	} else {
		logrus.Debugf("saving: %v", humanize.Bytes(uint64(n)))
	}
	if err := f.Sync(); err != nil {
		return err
	}
	if err := f.Close(); err != nil {
		return err
	}
	return os.Rename(f.Name(), output)
}

func (w *hexWriter) Write(p []byte) (n int, err error) {
	for _, v := range p {
		if w.count == 16 {
			if !w.sizeWritten {
				w.hrs.write("  // ")
				w.hrs.write(humanize.Bytes(w.size))
				w.sizeWritten = true
			}
			w.hrs.newLine()
			w.count = 0
		} else if w.count != 0 {
			w.hrs.write(" ")
		}
		if v < 0x10 {
			w.hrs.write("0")
		}
		w.hrs.write(strconv.FormatUint(uint64(v), 16))
		if w.hrs.err != nil {
			err = w.hrs.err
			return
		}
		n++
		w.count++
	}
	return
}

// pretty-print #files/#bytes transfer statistics
func fmtTransfer(numFiles, numBytes uint64, duration time.Duration) string {
	var s string

	if numFiles == 0 && numBytes == 0 {
		return "none"
	}
	s = fmt.Sprintf("%d file", numFiles)
	if numFiles != 1 {
		s += "s"
	}
	s = fmt.Sprintf("%s, %s", s, humanize.Bytes(numBytes))

	if duration > 0 {
		s = fmt.Sprintf("%s (%s/s)", s, humanize.Bytes(numBytes/uint64(duration.Seconds())))
	}
	return s
}

func writeEncodedValue(w io.Writer, v types.Value) error {
	if v.Type().Kind() != types.BlobKind {
		return types.WriteEncodedValue(w, v)
	}
	write(w, []byte("Blob ("))
	write(w, []byte(humanize.Bytes(v.(types.Blob).Len())))
	return write(w, []byte(")"))
}

func (mi *MetaInfo) String() string {
	s := ""
	if mi.Info != nil {
		s += fmt.Sprintf("info: %x(sha1)\n", mi.infoHash)
		s += fmt.Sprintf("\tpiece length: %d\n", mi.Info.PieceLength)
		s += fmt.Sprintf("\tpieces: suppressed\n")
		s += fmt.Sprintf("\tprivate: %d\n", mi.Info.Private)
		if mi.Info.Name != "" {
			s += fmt.Sprintf("\tname: %q", mi.Info.Name)
		}
		if mi.Info.Length > 0 {
			s += fmt.Sprintf(" (%s)\n", humanize.Bytes(mi.Info.Length))
		} else {
			s += "\n"
		}
		if len(mi.Info.Files) > 0 {
			s += fmt.Sprintf("\tfiles:\n")
		}
		for _, f := range mi.Info.Files {
			s += fmt.Sprintf("\t\tpath: %q (%s)\n", filepath.Join(f.Path...), humanize.Bytes(f.Length))
		}
	}
	if len(mi.Announce) > 0 {
		s += fmt.Sprintf("announce: %q\n", mi.Announce)
	}
	if len(mi.AnnounceList) > 0 {
		s += fmt.Sprintf("announce-list:\n")
	}
	for _, a := range mi.AnnounceList {
		s += fmt.Sprintf("\t%q\n", strings.Join(a, ","))
	}
	if mi.CreationDate > 0 {
		s += fmt.Sprintf("ceation date: %s\n", time.Unix(mi.CreationDate, 0))
	}
	if mi.Comment != "" {
		s += fmt.Sprintf("comment: %q\n", mi.Comment)
	}
	if mi.CreatedBy != "" {
		s += fmt.Sprintf("created by: %q\n", mi.CreatedBy)
	}
	if mi.Encoding != "" {
		s += fmt.Sprintf("encoding: %s\n", mi.Encoding)
	}
	return s
}

func main() {
	var policies []clcv2.SBSServerPolicy
	var day = time.Now()
	var date = flag.String("start", day.Format("2006-01-02"), "Day to query storage usage for")
	flag.Usage = func() {
		fmt.Fprintf(os.Stderr, "usage: %s [options]  <Server-Policy-ID | Server-Name>\n", path.Base(os.Args[0]))
		flag.PrintDefaults()
	}

	flag.Parse()
	if flag.NArg() != 1 {
		flag.Usage()
		os.Exit(0)
	}

	day, err := time.Parse("2006-01-02", *date)
	if err != nil {
		exit.Error("invalid backup query date %s (expected format: YYYY-MM-DD)", *date)
	}

	client, err := clcv2.NewCLIClient()
	if err != nil {
		exit.Fatal(err.Error())
	}

	// First look up the corresponding Server Policy or Policies, since the query needs the Account Policy ID.
	if utils.LooksLikeServerName(flag.Arg(0)) {
		policies, err = client.SBSgetServerPolicyDetails(flag.Arg(0))
		if err != nil {
			exit.Fatalf("failed to list SBS policies for server %s: %s", flag.Arg(0), err)
		}
	} else {
		p, err := client.SBSgetServerPolicy(flag.Arg(0))
		if err != nil {
			exit.Fatalf("failed to list SBS Server Policy %s: %s", flag.Arg(0), err)
		}
		policies = []clcv2.SBSServerPolicy{*p}
	}

	table := tablewriter.NewWriter(os.Stdout)
	table.SetAutoFormatHeaders(false)
	table.SetAlignment(tablewriter.ALIGN_CENTRE)
	table.SetAutoWrapText(false)
	table.SetHeader([]string{"Server",
		fmt.Sprintf("Usage on %s", day.Format("Mon, Jan 2 2006")),
		"Server Policy ID", "Account Policy ID",
	})

	for _, p := range policies {
		usage, err := client.SBSgetServerStorageUsage(p.AccountPolicyID, p.ID, day)
		if err != nil {
			exit.Fatalf("failed to obtain server %s storage use on %s: %s", p.ServerID, day.Format("2006-01-02"), err)
		}
		table.Append([]string{p.ServerID, humanize.Bytes(usage), p.ID, p.AccountPolicyID})
	}
	table.Render()
}

func (c *clusterClient) status(context *cli.Context) {
	c.clusterOptions(context)
	jsonOut := context.GlobalBool("json")
	outFd := os.Stdout
	fn := "status"

	cluster, err := c.manager.Enumerate()
	if err != nil {
		cmdError(context, fn, err)
		return
	}

	if jsonOut {
		fmtOutput(context, &Format{Cluster: &cluster})
	} else {
		fmt.Fprintf(outFd, "Cluster Information:\nCluster ID %s: Status: %v\n\n",
			cluster.Id, cluster.Status)

		fmt.Fprintf(outFd, "Load Information:\n")
		w := new(tabwriter.Writer)
		w.Init(outFd, 12, 12, 1, ' ', 0)

		fmt.Fprintln(w, "ID\t MGMT IP\t STATUS\t CPU\t MEM TOTAL\t MEM FREE")
		for _, n := range cluster.Nodes {
			status := ""
			if n.Status == api.Status_STATUS_INIT {
				status = "Initializing"
			} else if n.Status == api.Status_STATUS_OK {
				status = "OK"
			} else if n.Status == api.Status_STATUS_OFFLINE {
				status = "Off Line"
			} else {
				status = "Error"
			}

			fmt.Fprintln(w, n.Id, "\t", n.MgmtIp, "\t", status, "\t",
				n.Cpu, "\t", humanize.Bytes(n.MemTotal), "\t",
				humanize.Bytes(n.MemFree))
		}

		fmt.Fprintln(w)
		w.Flush()
	}
}

func getStatusPrinter(expectedLen int64) progressreader.Callback {
	return func(seenLen uint64) {
		var expected string
		if expectedLen < 0 {
			expected = "(unknown)"
		} else {
			expected = human.Bytes(uint64(expectedLen))
		}

		elapsed := time.Now().Sub(start)
		rate := uint64(float64(seenLen) / elapsed.Seconds())

		status.Printf("%s of %s written in %ds (%s/s)...",
			human.Bytes(seenLen),
			expected,
			uint64(elapsed.Seconds()),
			human.Bytes(rate))
	}
}

func GetSizes() string {
	kernel32, err := syscall.LoadDLL("kernel32.dll")

	if nil != err {
		abort("loadLibrary", err)
	}
	defer kernel32.Release()
	get, err := kernel32.FindProc("GetSystemFileCacheSize")
	if nil != err {
		abort("GetProcAddress", err)
	}
	var minFileCache uint64
	var maxFileCache uint64
	var lpFlags uint32
	res, _, err := get.Call(uintptr(unsafe.Pointer(&minFileCache)), uintptr(unsafe.Pointer(&maxFileCache)), uintptr(unsafe.Pointer(&lpFlags)))
	if res == 0 {
		abort("getSystemFileCacheSize", err)
	}
	return fmt.Sprintf("Min: %v Max: %v Flags: %v", human.Bytes(minFileCache), human.Bytes(maxFileCache), lpFlags)

}