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package widgets
import (
"fmt"
"log"
"strings"
"time"
"github.com/prometheus/client_golang/prometheus"
psNet "github.com/shirou/gopsutil/net"
ui "github.com/xxxserxxx/gotop/v3/termui"
"github.com/xxxserxxx/gotop/v3/utils"
)
const (
NET_INTERFACE_ALL = "all"
NET_INTERFACE_VPN = "tun0"
)
type NetWidget struct {
*ui.SparklineGroup
updateInterval time.Duration
// used to calculate recent network activity
totalBytesRecv uint64
totalBytesSent uint64
NetInterface []string
sentMetric prometheus.Counter
recvMetric prometheus.Counter
Mbps bool
}
// TODO: state:merge #169 % option for network use (jrswab/networkPercentage)
func NewNetWidget(netInterface string) *NetWidget {
recvSparkline := ui.NewSparkline()
recvSparkline.Data = []int{}
sentSparkline := ui.NewSparkline()
sentSparkline.Data = []int{}
spark := ui.NewSparklineGroup(recvSparkline, sentSparkline)
self := &NetWidget{
SparklineGroup: spark,
updateInterval: time.Second,
NetInterface: strings.Split(netInterface, ","),
}
self.Title = " Network Usage "
if netInterface != "all" {
self.Title = fmt.Sprintf(" Network Usage: %s ", netInterface)
}
self.update()
go func() {
for range time.NewTicker(self.updateInterval).C {
self.Lock()
self.update()
self.Unlock()
}
}()
return self
}
func (b *NetWidget) EnableMetric() {
b.recvMetric = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "gotop",
Subsystem: "net",
Name: "recv",
})
prometheus.MustRegister(b.recvMetric)
b.sentMetric = prometheus.NewCounter(prometheus.CounterOpts{
Namespace: "gotop",
Subsystem: "net",
Name: "sent",
})
prometheus.MustRegister(b.sentMetric)
}
func (self *NetWidget) update() {
interfaces, err := psNet.IOCounters(true)
if err != nil {
log.Printf("failed to get network activity from gopsutil: %v", err)
return
}
var totalBytesRecv uint64
var totalBytesSent uint64
interfaceMap := make(map[string]bool)
// Default behaviour
interfaceMap[NET_INTERFACE_ALL] = true
interfaceMap[NET_INTERFACE_VPN] = false
// Build a map with wanted status for each interfaces.
for _, iface := range self.NetInterface {
if strings.HasPrefix(iface, "!") {
interfaceMap[strings.TrimPrefix(iface, "!")] = false
} else {
// if we specify a wanted interface, remove capture on all.
delete(interfaceMap, NET_INTERFACE_ALL)
interfaceMap[iface] = true
}
}
for _, _interface := range interfaces {
wanted, ok := interfaceMap[_interface.Name]
if wanted && ok { // Simple case
totalBytesRecv += _interface.BytesRecv
totalBytesSent += _interface.BytesSent
} else if ok { // Present but unwanted
continue
} else if interfaceMap[NET_INTERFACE_ALL] { // Capture other
totalBytesRecv += _interface.BytesRecv
totalBytesSent += _interface.BytesSent
}
}
var recentBytesRecv uint64
var recentBytesSent uint64
if self.totalBytesRecv != 0 { // if this isn't the first update
recentBytesRecv = totalBytesRecv - self.totalBytesRecv
recentBytesSent = totalBytesSent - self.totalBytesSent
if int(recentBytesRecv) < 0 {
log.Printf("error: negative value for recently received network data from gopsutil. recentBytesRecv: %v", recentBytesRecv)
// recover from error
recentBytesRecv = 0
}
if int(recentBytesSent) < 0 {
log.Printf("error: negative value for recently sent network data from gopsutil. recentBytesSent: %v", recentBytesSent)
// recover from error
recentBytesSent = 0
}
self.Lines[0].Data = append(self.Lines[0].Data, int(recentBytesRecv))
self.Lines[1].Data = append(self.Lines[1].Data, int(recentBytesSent))
if self.sentMetric != nil {
self.sentMetric.Add(float64(recentBytesSent))
self.recvMetric.Add(float64(recentBytesRecv))
}
}
// used in later calls to update
self.totalBytesRecv = totalBytesRecv
self.totalBytesSent = totalBytesSent
rx, tx := "RX/s", "TX/s"
if self.Mbps {
rx, tx = "mbps", "mbps"
}
format := " %s: %9.1f %2s/s"
var total, recent uint64
var label, unitRecent, rate string
var recentConverted float64
// render widget titles
for i := 0; i < 2; i++ {
if i == 0 {
total, label, rate, recent = totalBytesRecv, "RX", rx, recentBytesRecv
} else {
total, label, rate, recent = totalBytesSent, "TX", tx, recentBytesSent
}
totalConverted, unitTotal := utils.ConvertBytes(total)
if self.Mbps {
recentConverted, unitRecent, format = float64(recent)*0.000008, "", " %s: %11.3f %2s"
} else {
recentConverted, unitRecent = utils.ConvertBytes(recent)
}
self.Lines[i].Title1 = fmt.Sprintf(" Total %s: %5.1f %s", label, totalConverted, unitTotal)
self.Lines[i].Title2 = fmt.Sprintf(format, rate, recentConverted, unitRecent)
}
}
|