99 lines
2.1 KiB
Go
99 lines
2.1 KiB
Go
package widgets
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import (
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"fmt"
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"time"
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"github.com/cjbassi/gotop/utils"
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ui "github.com/cjbassi/termui"
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psNet "github.com/shirou/gopsutil/net"
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)
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type Net struct {
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*ui.Sparklines
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interval time.Duration
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// used to calculate recent network activity
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recvTotal uint64
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sentTotal uint64
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}
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func NewNet() *Net {
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recv := ui.NewSparkline()
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recv.Data = []int{0}
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sent := ui.NewSparkline()
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sent.Data = []int{0}
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spark := ui.NewSparklines(recv, sent)
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self := &Net{
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Sparklines: spark,
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interval: time.Second,
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}
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self.Label = "Network Usage"
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go self.update()
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ticker := time.NewTicker(self.interval)
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go func() {
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for range ticker.C {
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self.update()
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}
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}()
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return self
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}
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func (self *Net) update() {
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// `false` causes psutil to group all network activity
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interfaces, _ := psNet.IOCounters(false)
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recvTotal := interfaces[0].BytesRecv
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sentTotal := interfaces[0].BytesSent
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if self.recvTotal != 0 { // if this isn't the first update
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recvRecent := recvTotal - self.recvTotal
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sentRecent := sentTotal - self.sentTotal
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self.Lines[0].Data = append(self.Lines[0].Data, int(recvRecent))
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self.Lines[1].Data = append(self.Lines[1].Data, int(sentRecent))
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}
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// used in later calls to update
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self.recvTotal = recvTotal
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self.sentTotal = sentTotal
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// renders net widget titles
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for i := 0; i < 2; i++ {
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var method string // either 'Rx' or 'Tx'
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var total float64
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recent := self.Lines[i].Data[len(self.Lines[i].Data)-1]
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unitTotal := "B"
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unitRecent := "B"
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if i == 0 {
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total = float64(recvTotal)
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method = "Rx"
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} else {
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total = float64(sentTotal)
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method = "Tx"
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}
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if recent >= 1000000 {
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recent = int(utils.BytesToMB(uint64(recent)))
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unitRecent = "MB"
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} else if recent >= 1000 {
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recent = int(utils.BytesToKB(uint64(recent)))
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unitRecent = "kB"
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}
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if total >= 1000000000 {
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total = utils.BytesToGB(uint64(total))
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unitTotal = "GB"
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} else if total >= 1000000 {
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total = utils.BytesToMB(uint64(total))
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unitTotal = "MB"
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}
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self.Lines[i].Title1 = fmt.Sprintf(" Total %s: %5.1f %s", method, total, unitTotal)
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self.Lines[i].Title2 = fmt.Sprintf(" %s/s: %9d %2s/s", method, recent, unitRecent)
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}
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}
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