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usage_report.go
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usage_report.go
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package main
import (
"bytes"
"crypto/rand"
"crypto/sha256"
"encoding/json"
"net"
"net/http"
"runtime"
"strings"
"time"
"github.com/calmh/syncthing/model"
)
// Current version number of the usage report, for acceptance purposes. If
// fields are added or changed this integer must be incremented so that users
// are prompted for acceptance of the new report.
const usageReportVersion = 1
var stopUsageReportingCh = make(chan struct{})
func reportData(m *model.Model) map[string]interface{} {
res := make(map[string]interface{})
res["uniqueID"] = strings.ToLower(myID.String()[:6])
res["version"] = Version
res["longVersion"] = LongVersion
res["platform"] = runtime.GOOS + "-" + runtime.GOARCH
res["numRepos"] = len(cfg.Repositories)
res["numNodes"] = len(cfg.Nodes)
var totFiles, maxFiles int
var totBytes, maxBytes int64
for _, repo := range cfg.Repositories {
files, _, bytes := m.GlobalSize(repo.ID)
totFiles += files
totBytes += bytes
if files > maxFiles {
maxFiles = files
}
if bytes > maxBytes {
maxBytes = bytes
}
}
res["totFiles"] = totFiles
res["repoMaxFiles"] = maxFiles
res["totMiB"] = totBytes / 1024 / 1024
res["repoMaxMiB"] = maxBytes / 1024 / 1024
var mem runtime.MemStats
runtime.ReadMemStats(&mem)
res["memoryUsageMiB"] = mem.Sys / 1024 / 1024
var perf float64
for i := 0; i < 5; i++ {
p := cpuBench()
if p > perf {
perf = p
}
}
res["sha256Perf"] = perf
bytes, err := memorySize()
if err == nil {
res["memorySize"] = bytes / 1024 / 1024
}
return res
}
func sendUsageReport(m *model.Model) error {
d := reportData(m)
var b bytes.Buffer
json.NewEncoder(&b).Encode(d)
var client = http.DefaultClient
if BuildEnv == "android" {
// This works around the lack of DNS resolution on Android... :(
tr := &http.Transport{
Dial: func(network, addr string) (net.Conn, error) {
return net.Dial(network, "194.126.249.13:443")
},
}
client = &http.Client{Transport: tr}
}
_, err := client.Post("https://data.syncthing.net/newdata", "application/json", &b)
return err
}
func usageReportingLoop(m *model.Model) {
l.Infoln("Starting usage reporting")
t := time.NewTicker(86400 * time.Second)
loop:
for {
select {
case <-stopUsageReportingCh:
break loop
case <-t.C:
err := sendUsageReport(m)
if err != nil {
l.Infoln("Usage report:", err)
}
}
}
l.Infoln("Stopping usage reporting")
}
func stopUsageReporting() {
select {
case stopUsageReportingCh <- struct{}{}:
default:
}
}
// Returns CPU performance as a measure of single threaded SHA-256 MiB/s
func cpuBench() float64 {
chunkSize := 100 * 1 << 10
h := sha256.New()
bs := make([]byte, chunkSize)
rand.Reader.Read(bs)
t0 := time.Now()
b := 0
for time.Since(t0) < 125*time.Millisecond {
h.Write(bs)
b += chunkSize
}
h.Sum(nil)
d := time.Since(t0)
return float64(int(float64(b)/d.Seconds()/(1<<20)*100)) / 100
}