package trafficlogger
import (
"encoding/json"
"net/http"
"strconv"
"sync"
"github.com/apernet/hysteria/core/server"
)
const (
indexHTML = `<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>Hysteria Traffic Stats API Server</title> <style>body{font-family: Arial, sans-serif; display: flex; justify-content: center; align-items: center; height: 100vh; margin: 0; padding: 0; background-color: #f4f4f4;}.container{padding: 20px; background-color: #fff; box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1); border-radius: 5px;}</style></head><body> <div class="container"> <p>This is a Hysteria Traffic Stats API server.</p><p>Check the documentation for usage.</p></div></body></html>`
)
// TrafficStatsServer implements both server.TrafficLogger and http.Handler
// to provide a simple HTTP API to get the traffic stats per user.
type TrafficStatsServer interface {
server.TrafficLogger
http.Handler
}
func NewTrafficStatsServer(secret string) TrafficStatsServer {
return &trafficStatsServerImpl{
StatsMap: make(map[string]*trafficStatsEntry),
KickMap: make(map[string]struct{}),
Secret: secret,
}
}
type trafficStatsServerImpl struct {
Mutex sync.RWMutex
StatsMap map[string]*trafficStatsEntry
KickMap map[string]struct{}
Secret string
}
type trafficStatsEntry struct {
Tx uint64 `json:"tx"`
Rx uint64 `json:"rx"`
}
func (s *trafficStatsServerImpl) Log(id string, tx, rx uint64) (ok bool) {
s.Mutex.Lock()
defer s.Mutex.Unlock()
_, ok = s.KickMap[id]
if ok {
delete(s.KickMap, id)
return false
}
entry, ok := s.StatsMap[id]
if !ok {
entry = &trafficStatsEntry{}
s.StatsMap[id] = entry
}
entry.Tx += tx
entry.Rx += rx
return true
}
func (s *trafficStatsServerImpl) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if s.Secret != "" && r.Header.Get("Authorization") != s.Secret {
http.Error(w, "unauthorized", http.StatusUnauthorized)
return
}
if r.Method == http.MethodGet && r.URL.Path == "/" {
_, _ = w.Write([]byte(indexHTML))
return
}
if r.Method == http.MethodGet && r.URL.Path == "/traffic" {
s.getTraffic(w, r)
return
}
if r.Method == http.MethodPost && r.URL.Path == "/kick" {
s.kick(w, r)
return
}
http.NotFound(w, r)
}
func (s *trafficStatsServerImpl) getTraffic(w http.ResponseWriter, r *http.Request) {
bClear, _ := strconv.ParseBool(r.URL.Query().Get("clear"))
var jb []byte
var err error
if bClear {
s.Mutex.Lock()
jb, err = json.Marshal(s.StatsMap)
s.StatsMap = make(map[string]*trafficStatsEntry)
s.Mutex.Unlock()
} else {
s.Mutex.RLock()
jb, err = json.Marshal(s.StatsMap)
s.Mutex.RUnlock()
}
if err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
return
}
w.Header().Set("Content-Type", "application/json; charset=utf-8")
_, _ = w.Write(jb)
}
func (s *trafficStatsServerImpl) kick(w http.ResponseWriter, r *http.Request) {
var ids []string
err := json.NewDecoder(r.Body).Decode(&ids)
if err != nil {
http.Error(w, err.Error(), http.StatusBadRequest)
return
}
s.Mutex.Lock()
for _, id := range ids {
s.KickMap[id] = struct{}{}
}
s.Mutex.Unlock()
w.WriteHeader(http.StatusOK)
}