func printEntries(writer io.Writer, entries []stats_entry.Entry) error {
sort.Sort(stats_entry.EntryByTimestampDesc(entries))
for i := 0; i < len(entries)-1; i++ {
b := entries[i]
a := entries[i+1]
hourDiff := float64(a.Timestamp-b.Timestamp) / float64(time.Hour)
valueDiff := a.Value - b.Value
diff := float64(valueDiff) / hourDiff
t := time.Unix(0, a.Timestamp)
fmt.Fprintf(writer, "%s %s %s %s/h\n", timeToString(t), extendToLength(fmt.Sprintf("%d", a.Value), 12), extendToLength(fmt.Sprintf("%d", valueDiff), 12), extendToLength(fmt.Sprintf("%.2f", diff), 12))
}
return nil
}
func (h *handler) serveHTTP(responseWriter http.ResponseWriter, request *http.Request) error {
var err error
var limit int
if limit, err = strconv.Atoi(request.FormValue("limit")); err != nil {
limit = -1
}
var list []stats_entry.Entry
if limit > 0 {
if list, err = h.service.ListLimited(limit); err != nil {
return err
}
} else {
if list, err = h.service.List(); err != nil {
return err
}
}
sort.Sort(stats_entry.EntryByTimestampDesc(list))
j := json_handler.NewJsonHandler(list)
j.ServeHTTP(responseWriter, request)
return nil
}