/
main.go
157 lines (132 loc) · 3.26 KB
/
main.go
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package main
import (
"runtime"
"reflect"
"log"
"fmt"
"time"
"net/http"
"github.com/shirou/gopsutil/disk"
"github.com/shirou/gopsutil/mem"
"github.com/shirou/gopsutil/cpu"
"github.com/davecgh/go-spew/spew"
"github.com/ant0ine/go-json-rest/rest"
// "github.com/oleiade/reflections"
)
type Message struct {
Body string
}
type Data struct {
Memory Memory `json:"memory"`
CPU CPU `json:"cpu"`
Disk Disk `json:"disk"`
}
type Memory struct {
Total string `json:"total"`
Free string `json:"free"`
}
type CPU struct {
Count int32 `json:"count"`
Idle float64 `json:"idle"`
}
type Disk struct {
MountPoint string `json:"mount_point"`
Device string `json:"device"`
Total uint64 `json:"total"`
Free uint64 `json:"free"`
}
var v *mem.VirtualMemoryStat
var ct []cpu.CPUTimesStat
var ci []cpu.CPUInfoStat
var disks []disk.DiskPartitionStat
var disksUsage *disk.DiskUsageStat
var err error
func updateMemory() {
v, err = mem.VirtualMemory()
log.Printf("updateMemory(): %v", spew.Sdump(v))
if err != nil { log.Fatal(err) }
}
func updateCPUTimes() {
ct, err = cpu.CPUTimes(false)
log.Printf("updateCPUTimes(): %v", spew.Sdump(ct))
if err != nil { log.Fatal(err) }
}
func updateCPUInfo() {
ci, err = cpu.CPUInfo()
log.Printf("updateCPUInfo(): %v", spew.Sdump(ci))
if err != nil { log.Fatal(err) }
}
func updateDisk() {
disks, err = disk.DiskPartitions(true)
log.Printf("updateDisk(): %v", spew.Sdump(disks))
if err != nil { log.Fatal(err) }
disksUsage, err = disk.DiskUsage("/")
log.Printf("updateDisk(): %v", spew.Sdump(disksUsage))
if err != nil { log.Fatal(err) }
}
func nameOf(f interface{}) string {
v := reflect.ValueOf(f)
if v.Kind() == reflect.Func {
if rf := runtime.FuncForPC(v.Pointer()); rf != nil {
return rf.Name()
}
}
return v.String()
}
func refreshData(what func(), x time.Duration) {
for _ = range time.Tick(time.Second * x) {
log.Printf("Running %v()..", nameOf(what))
what()
}
}
func data() Data {
d := Data{
Memory: Memory{
Total: fmt.Sprintf("%d", v.Available),
Free: fmt.Sprintf("%d", v.Free),
},
CPU: CPU{
Count: ci[0].Cores,
Idle: ct[0].Idle,
},
Disk: Disk{
MountPoint: disks[0].Mountpoint,
Device: disks[0].Device,
Total: disksUsage.Total,
Free: disksUsage.Free,
},
}
return d
}
func main() {
log.Printf("Starting up..")
updateMemory()
updateCPUTimes()
updateCPUInfo()
updateDisk()
api := rest.NewApi()
api.Use(rest.DefaultDevStack...)
go refreshData(updateMemory, 15)
go refreshData(updateCPUTimes, 15)
go refreshData(updateDisk, 60)
router, err := rest.MakeRouter(
rest.Get("/", func(w rest.ResponseWriter, req *rest.Request) {
d := data()
w.WriteJson(d)
}),
// rest.Get("/#key", func(w rest.ResponseWriter, req *rest.Request) {
// data := data()
// extractedData, err := reflections.GetField(data, req.PathParam("key"))
//
// if err != nil {
// rest.Error(w, err.Error(), http.StatusInternalServerError)
// return
// }
//
// w.WriteJson(extractedData)
// }),
)
if err != nil { log.Fatal(err) }
api.SetApp(router)
log.Fatal(http.ListenAndServe(":8080", api.MakeHandler()))
}