130 lines
3.3 KiB
Go
130 lines
3.3 KiB
Go
// Copyright (C) 2015 Audrius Butkevicius and Contributors.
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package main
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import (
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"encoding/json"
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"log"
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"net/http"
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"net/http/pprof"
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"runtime"
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"sync/atomic"
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"time"
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"github.com/syncthing/syncthing/lib/build"
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)
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var rc *rateCalculator
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func statusService(addr string) {
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rc = newRateCalculator(360, 10*time.Second, &bytesProxied)
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handler := http.NewServeMux()
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handler.HandleFunc("/status", getStatus)
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if pprofEnabled {
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handler.HandleFunc("/debug/pprof/", pprof.Index)
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}
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srv := http.Server{
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Addr: addr,
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Handler: handler,
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ReadTimeout: 15 * time.Second,
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}
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srv.SetKeepAlivesEnabled(false)
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if err := srv.ListenAndServe(); err != nil {
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log.Fatal(err)
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}
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}
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func getStatus(w http.ResponseWriter, _ *http.Request) {
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w.Header().Set("Access-Control-Allow-Origin", "*")
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status := make(map[string]interface{})
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sessionMut.Lock()
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// This can potentially be double the number of pending sessions, as each session has two keys, one for each side.
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status["version"] = build.Version
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status["buildHost"] = build.Host
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status["buildUser"] = build.User
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status["buildDate"] = build.Date
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status["startTime"] = rc.startTime
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status["uptimeSeconds"] = time.Since(rc.startTime) / time.Second
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status["numPendingSessionKeys"] = len(pendingSessions)
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status["numActiveSessions"] = len(activeSessions)
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sessionMut.Unlock()
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status["numConnections"] = numConnections.Load()
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status["numProxies"] = numProxies.Load()
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status["bytesProxied"] = bytesProxied.Load()
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status["goVersion"] = runtime.Version()
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status["goOS"] = runtime.GOOS
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status["goArch"] = runtime.GOARCH
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status["goMaxProcs"] = runtime.GOMAXPROCS(-1)
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status["goNumRoutine"] = runtime.NumGoroutine()
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status["kbps10s1m5m15m30m60m"] = []int64{
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rc.rate(1) * 8 / 1000, // each interval is 10s
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rc.rate(60/10) * 8 / 1000,
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rc.rate(5*60/10) * 8 / 1000,
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rc.rate(15*60/10) * 8 / 1000,
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rc.rate(30*60/10) * 8 / 1000,
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rc.rate(60*60/10) * 8 / 1000,
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}
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status["options"] = map[string]interface{}{
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"network-timeout": networkTimeout / time.Second,
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"ping-interval": pingInterval / time.Second,
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"message-timeout": messageTimeout / time.Second,
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"per-session-rate": sessionLimitBps,
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"global-rate": globalLimitBps,
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"pools": pools,
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"provided-by": providedBy,
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}
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bs, err := json.MarshalIndent(status, "", " ")
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if err != nil {
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http.Error(w, err.Error(), http.StatusInternalServerError)
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return
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}
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w.Header().Set("Content-Type", "application/json")
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w.Write(bs)
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}
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type rateCalculator struct {
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counter *atomic.Int64
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rates []int64
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prev int64
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startTime time.Time
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}
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func newRateCalculator(keepIntervals int, interval time.Duration, counter *atomic.Int64) *rateCalculator {
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r := &rateCalculator{
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rates: make([]int64, keepIntervals),
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counter: counter,
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startTime: time.Now(),
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}
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go r.updateRates(interval)
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return r
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}
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func (r *rateCalculator) updateRates(interval time.Duration) {
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for {
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now := time.Now()
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next := now.Truncate(interval).Add(interval)
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time.Sleep(next.Sub(now))
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cur := r.counter.Load()
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rate := int64(float64(cur-r.prev) / interval.Seconds())
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copy(r.rates[1:], r.rates)
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r.rates[0] = rate
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r.prev = cur
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}
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}
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func (r *rateCalculator) rate(periods int) int64 {
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var tot int64
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for i := 0; i < periods; i++ {
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tot += r.rates[i]
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}
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return tot / int64(periods)
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}
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