Example #1
0
func history(w http.ResponseWriter, r *http.Request) {
	if !basicAuth(w, r) {
		return
	}
	to := time.Now()
	from := to.Add(-1 * time.Hour)
	list := db.ReadDiffies(from, to)
	reply(w, list)
}
Example #2
0
func Graph(width int, height int) ([]Point, []Point, []Point, []Point) {
	to := time.Now()
	from := to.Add(-24 * time.Hour)
	list := db.ReadDiffies(from, to)

	user := make([]Point, 1)
	iowait := make([]Point, 1)
	temperature := make([]Point, 1)

	t0 := list[0].Timestamp.Unix()
	tf := list[len(list)-1].Timestamp.Unix()
	d := int(tf - t0)

	p0 := Point{x: 0, y: height}
	user[0], iowait[0], temperature[0] = p0, p0, p0

	xold := 0
	for _, diff := range list {
		xi := width * int(diff.Timestamp.Unix()-t0) / d
		if xi-xold > 10 {
			p1 := Point{x: xold, y: height}
			user, iowait, temperature = append(user, p1), append(iowait, p1), append(temperature, p1)
			p2 := Point{x: xi, y: height}
			user, iowait, temperature = append(user, p2), append(iowait, p2), append(temperature, p2)
		}
		user = append(user, Point{x: xi, y: height - int(diff.User/100.0*float64(height))})
		iowait = append(iowait, Point{x: xi, y: height - int(diff.Iowait/100.0*float64(height))})
		temperature = append(temperature, Point{x: xi, y: height - int(diff.Temperature/100.0*float64(height))})
		xold = xi
	}

	pf := Point{x: width, y: height}
	user, iowait, temperature = append(user, pf), append(iowait, pf), append(temperature, pf)

	box := []Point{Point{x: 0, y: 0}, Point{x: width, y: 0}, Point{x: width, y: height}, Point{x: 0, y: height}}

	return box, user, temperature, iowait
}