240 lines
7.2 KiB
Go
240 lines
7.2 KiB
Go
package main
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import (
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"context"
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"crypto/tls"
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"encoding/json"
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"errors"
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"flag"
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"io"
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"log"
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"net/http"
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"os"
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"runtime"
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"sync"
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"time"
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"github.com/gorilla/websocket"
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"github.com/wjyhk/vps-commander/internal/cluster"
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"github.com/wjyhk/vps-commander/internal/executor"
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"github.com/wjyhk/vps-commander/internal/sysinfo"
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)
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func main() {
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hub := flag.String("hub", "", "Hub WebSocket URL")
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name := flag.String("name", "", "device name")
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token := flag.String("token", os.Getenv("VPS_COMMANDER_CLUSTER_SECRET"), "cluster secret")
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insecure := flag.Bool("insecure", false, "skip TLS verification")
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flag.Parse()
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if *hub == "" || *name == "" || *token == "" {
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log.Fatal("-hub, -name and -token are required")
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}
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backoff := time.Second
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for {
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if err := run(*hub, *name, *token, *insecure); err != nil {
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log.Printf("agent connection: %v", err)
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}
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time.Sleep(backoff)
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if backoff < 30*time.Second {
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backoff *= 2
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if backoff > 30*time.Second {
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backoff = 30 * time.Second
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}
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}
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}
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}
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func run(hub, name, token string, insecure bool) error {
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u := hub + "?device_name=" + name
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dialer := websocket.DefaultDialer
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if insecure {
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dialer = &websocket.Dialer{TLSClientConfig: &tls.Config{InsecureSkipVerify: true}}
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}
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header := http.Header{}
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header.Set("Authorization", "Bearer "+token)
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c, _, err := dialer.Dial(u, header)
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if err != nil {
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return err
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}
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defer c.Close()
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var writeMu sync.Mutex
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writeJSON := func(msg cluster.Message) error {
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writeMu.Lock()
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defer writeMu.Unlock()
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if err := c.SetWriteDeadline(time.Now().Add(10 * time.Second)); err != nil {
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return err
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}
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return c.WriteJSON(msg)
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}
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if err := c.SetReadDeadline(time.Now().Add(75 * time.Second)); err != nil {
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return err
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}
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exec := executor.Local{MaxOutput: 1024 * 1024}
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mcpRuntime := cluster.NewMCPRuntime()
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// 初始握手附带画像
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initProf := sysinfo.Collect("APPLICATION")
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if err := writeJSON(cluster.Message{Event: "hello", Device: name, Arch: runtime.GOARCH, OS: runtime.GOOS, Profile: &initProf, TS: time.Now().Unix()}); err != nil {
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return err
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}
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stopPing := make(chan struct{})
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defer close(stopPing)
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go func() {
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t := time.NewTicker(15 * time.Second)
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defer t.Stop()
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for {
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select {
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case <-t.C:
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prof := sysinfo.Collect("APPLICATION")
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_ = writeJSON(cluster.Message{Event: "ping", Device: name, Arch: runtime.GOARCH, OS: runtime.GOOS, Profile: &prof, TS: time.Now().Unix()})
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case <-stopPing:
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return
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}
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}
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}()
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for {
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var msg cluster.Message
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if err := c.ReadJSON(&msg); err != nil {
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return err
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}
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_ = c.SetReadDeadline(time.Now().Add(75 * time.Second))
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if msg.Event == "registered" {
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continue
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}
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if msg.Event == "mcp_sync" {
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var services []cluster.MCPService
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if err := decodePayload(msg.Payload, &services); err != nil {
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log.Printf("mcp sync failed: %v", err)
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} else {
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mcpRuntime.Sync(services)
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log.Printf("MCP services synced: %d", len(services))
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}
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continue
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}
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if msg.Event == "revoked" {
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log.Printf("device revoked by admin: %s", msg.Error)
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return errors.New("revoked by admin")
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}
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if msg.Event == "ping" {
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prof := sysinfo.Collect("APPLICATION")
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if err := writeJSON(cluster.Message{Event: "pong", Device: name, Arch: runtime.GOARCH, OS: runtime.GOOS, Profile: &prof, TS: msg.TS}); err != nil {
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return err
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}
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continue
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}
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if msg.Action == "" || msg.ID == "" {
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continue
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}
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go func(msg cluster.Message) {
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if err := handle(writeJSON, exec, mcpRuntime, msg); err != nil {
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log.Printf("request %s failed: %v", msg.ID, err)
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_ = c.Close()
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}
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}(msg)
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}
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}
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func handle(writeJSON func(cluster.Message) error, exec executor.Local, mcpRuntime *cluster.MCPRuntime, msg cluster.Message) error {
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switch msg.Action {
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case "mcp_list":
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return writeJSON(cluster.Message{ID: msg.ID, Status: "success", Payload: mcpRuntime.List()})
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case "mcp_call":
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var p struct {
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Server string `json:"server"`
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Tool string `json:"tool"`
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Args any `json:"args"`
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}
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if err := decodePayload(msg.Payload, &p); err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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if p.Server == "" || p.Tool == "" {
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return sendError(writeJSON, msg.ID, errors.New("server and tool required"))
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}
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ctx, cancel := context.WithTimeout(context.Background(), 300*time.Second)
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defer cancel()
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start := time.Now()
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result, err := mcpRuntime.Call(ctx, p.Server, p.Tool, p.Args)
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duration := time.Since(start).Milliseconds()
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if err != nil {
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_ = writeJSON(cluster.Message{ID: msg.ID, Status: "error", Error: err.Error(), Payload: map[string]any{"server": p.Server, "tool": p.Tool, "duration_ms": duration}})
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return nil
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}
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return writeJSON(cluster.Message{ID: msg.ID, Status: "success", Payload: map[string]any{"server": p.Server, "tool": p.Tool, "result": result, "duration_ms": duration}})
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case "exec":
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var p cluster.ExecPayload
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if err := decodePayload(msg.Payload, &p); err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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timeout := p.Timeout
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if timeout <= 0 {
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timeout = 30
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}
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if timeout > 300 {
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timeout = 300
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}
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ctx, cancel := context.WithTimeout(context.Background(), time.Duration(timeout)*time.Second)
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res := exec.Run(ctx, p.Command, p.Workdir)
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cancel()
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return writeJSON(cluster.Message{ID: msg.ID, Status: "success", ExitCode: res.ExitCode, Stdout: res.Stdout, Stderr: res.Stderr, DurationMS: res.DurationMS})
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case "file_read":
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var p cluster.FileReadPayload
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if err := decodePayload(msg.Payload, &p); err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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if p.Offset < 0 {
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return sendError(writeJSON, msg.ID, errors.New("negative offset"))
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}
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f, err := os.Open(p.Path)
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if err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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defer f.Close()
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info, err := f.Stat()
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if err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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if _, err = f.Seek(p.Offset, io.SeekStart); err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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limit := p.Limit
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if limit <= 0 || limit > 1024*1024 {
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limit = 256 * 1024
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}
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buf := make([]byte, limit)
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n, err := io.ReadFull(f, buf)
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eof := err == io.EOF || err == io.ErrUnexpectedEOF
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if err != nil && !eof {
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return sendError(writeJSON, msg.ID, err)
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}
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return writeJSON(cluster.Message{ID: msg.ID, Status: "success", Payload: map[string]any{"content": string(buf[:n]), "bytes": n, "total_size": info.Size(), "has_more": p.Offset+int64(n) < info.Size(), "eof": eof}})
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case "file_write":
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var p cluster.FileWritePayload
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if err := decodePayload(msg.Payload, &p); err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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if len(p.Content) > 1024*1024 {
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return sendError(writeJSON, msg.ID, errors.New("content too large"))
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}
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if err := os.WriteFile(p.Path, []byte(p.Content), 0644); err != nil {
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return sendError(writeJSON, msg.ID, err)
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}
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return writeJSON(cluster.Message{ID: msg.ID, Status: "success", Payload: map[string]any{"bytes": len(p.Content)}})
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default:
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return sendError(writeJSON, msg.ID, errors.New("unsupported action"))
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}
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}
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func decodePayload(v any, out any) error {
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b, err := json.Marshal(v)
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if err != nil {
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return err
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}
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return json.Unmarshal(b, out)
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}
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func sendError(writeJSON func(cluster.Message) error, id string, err error) error {
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return writeJSON(cluster.Message{ID: id, Status: "error", Error: err.Error()})
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}
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