mirror of
https://github.com/xjasonlyu/tun2socks.git
synced 2025-10-07 01:33:15 +08:00
185 lines
4.8 KiB
Go
185 lines
4.8 KiB
Go
package session
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import (
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"bufio"
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"errors"
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"fmt"
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"io"
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"net"
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"net/http"
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"runtime"
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"sort"
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"sync"
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"sync/atomic"
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"time"
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C "github.com/xjasonlyu/tun2socks/constant"
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)
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const maxCompletedSessions = 100
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type Server struct {
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sync.Mutex
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*http.Server
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ServeAddr string
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ServePath string
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trafficUp int64
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trafficDown int64
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activeSessionMap sync.Map
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completedSessions []Session
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}
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func New(addr string) *Server {
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return &Server{
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ServeAddr: addr,
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ServePath: "/session/plain",
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}
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}
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func (s *Server) handler(resp http.ResponseWriter, req *http.Request) {
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// Slice of active sessions
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var activeSessions []Session
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s.activeSessionMap.Range(func(key, value interface{}) bool {
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session := value.(*Session)
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activeSessions = append(activeSessions, *session)
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return true
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})
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// Slice of completed sessions
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s.Lock()
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completedSessions := append([]Session(nil), s.completedSessions...)
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s.Unlock()
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tablePrint := func(w io.Writer, sessions []Session) {
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// Sort by session start time.
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sort.Slice(sessions, func(i, j int) bool {
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return sessions[i].SessionStart.After(sessions[j].SessionStart)
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})
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_, _ = fmt.Fprintf(w, "<table style=\"border=4px solid\">")
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_, _ = fmt.Fprintf(w, "<tr><th>Process</th><th>Network</th><th>Date</th><th>Duration</th><th>Client Addr</th><th>Target Addr</th><th>Upload</th><th>Download</th></tr>\n")
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for _, session := range sessions {
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_, _ = fmt.Fprintf(w, "<tr><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td></tr>\n",
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session.Process,
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session.Network,
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date(session.SessionStart),
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duration(session.SessionStart, session.SessionClose),
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// session.DialerAddr,
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session.ClientAddr,
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session.TargetAddr,
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byteCountSI(session.UploadBytes),
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byteCountSI(session.DownloadBytes),
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)
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}
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_, _ = fmt.Fprintf(w, "</table>")
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}
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w := bufio.NewWriter(resp)
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// Html head
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_, _ = fmt.Fprintf(w, "<html>")
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_, _ = fmt.Fprintf(w, `<head><style>
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table, th, td {
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border: 1px solid black;
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border-collapse: collapse;
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text-align: right;
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padding: 4;
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}</style><title>Go-tun2socks Monitor</title></head>`)
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_, _ = fmt.Fprintf(w, "<h2>Go-tun2socks %s</h2>", C.Version)
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// Statistics table
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_, _ = fmt.Fprintf(w, "<p>Statistics (%d)</p>", runtime.NumGoroutine())
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_, _ = fmt.Fprintf(w, "<table style=\"border=4px solid\">")
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_, _ = fmt.Fprintf(w, "<tr><th>Last Refresh Time</th><th>Platform Version</th><th>CPU</th><th>MEM</th><th>Uptime</th><th>Total</th><th>Upload</th><th>Download</th></tr>\n")
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// calculate traffic
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trafficUp := atomic.LoadInt64(&s.trafficUp)
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trafficDown := atomic.LoadInt64(&s.trafficDown)
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for _, session := range activeSessions {
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trafficUp += session.UploadBytes
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trafficDown += session.DownloadBytes
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}
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_, _ = fmt.Fprintf(w, "<tr><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td><td>%v</td></tr>\n",
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date(time.Now()),
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platform(),
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cpu(),
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mem(),
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uptime(),
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byteCountSI(trafficUp+trafficDown),
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byteCountSI(trafficUp),
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byteCountSI(trafficDown),
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)
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runtime.NumGoroutine()
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_, _ = fmt.Fprintf(w, "</table>")
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// Session table
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_, _ = fmt.Fprintf(w, "<p>Active sessions: %d</p>", len(activeSessions))
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tablePrint(w, activeSessions)
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_, _ = fmt.Fprintf(w, "<p>Recently completed sessions: %d</p>", len(completedSessions))
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tablePrint(w, completedSessions)
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_, _ = fmt.Fprintf(w, "</html>")
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_ = w.Flush()
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}
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func (s *Server) Start() error {
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if s.ServePath == "" || s.ServePath == "/" {
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return errors.New("invalid serve path")
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}
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_, port, err := net.SplitHostPort(s.ServeAddr)
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if port == "0" || port == "" || err != nil {
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return errors.New("address format error")
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}
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tcpAddr, err := net.ResolveTCPAddr("tcp", s.ServeAddr)
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if err != nil {
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return err
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}
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c, err := net.ListenTCP("tcp", tcpAddr)
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if err != nil {
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return err
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}
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mux := http.NewServeMux()
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mux.HandleFunc("/", func(w http.ResponseWriter, r *http.Request) {
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http.Redirect(w, r, s.ServePath, 301)
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})
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mux.HandleFunc(s.ServePath, s.handler)
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s.Server = &http.Server{Addr: s.ServeAddr, Handler: mux}
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go func() {
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s.Serve(c)
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}()
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return nil
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}
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func (s *Server) Stop() error {
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return s.Close()
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}
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func (s *Server) AddSession(key interface{}, session *Session) {
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if session != nil {
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s.activeSessionMap.Store(key, session)
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}
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}
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func (s *Server) RemoveSession(key interface{}) {
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if item, ok := s.activeSessionMap.Load(key); ok {
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session := item.(*Session)
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// delete first
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s.activeSessionMap.Delete(key)
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// record up & down traffic
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atomic.AddInt64(&s.trafficUp, atomic.LoadInt64(&session.UploadBytes))
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atomic.AddInt64(&s.trafficDown, atomic.LoadInt64(&session.DownloadBytes))
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// move to completed sessions
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s.Lock()
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s.completedSessions = append(s.completedSessions, *session)
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if len(s.completedSessions) > maxCompletedSessions {
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s.completedSessions = s.completedSessions[1:]
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}
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s.Unlock()
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}
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}
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