236 lines
8.1 KiB
Go
236 lines
8.1 KiB
Go
package agent
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import (
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"context"
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"encoding/base64"
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"encoding/json"
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"errors"
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"io"
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"mime"
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"net/http"
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"os"
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"path/filepath"
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"runtime"
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"strconv"
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"strings"
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"time"
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"tea.chunkbyte.com/kato/go-worm/lib/command"
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"tea.chunkbyte.com/kato/go-worm/lib/config"
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"tea.chunkbyte.com/kato/go-worm/lib/files"
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"tea.chunkbyte.com/kato/go-worm/lib/helpers"
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"tea.chunkbyte.com/kato/go-worm/lib/models"
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"tea.chunkbyte.com/kato/go-worm/lib/screenshot"
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)
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func (a *Agent) handleIndex(w http.ResponseWriter, r *http.Request) {
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if r.URL.Path != "/" || r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusNotFound, "endpoint not found")
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return
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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_, _ = io.WriteString(w, `<!doctype html><html><head><meta charset="utf-8"><title>Local Management Agent</title><style>body{font:16px system-ui;max-width:900px;margin:3rem auto;color:#1f2937}code{background:#f3f4f6;padding:.15rem .3rem;border-radius:3px}li{margin:.5rem 0}</style></head><body><h1>Local Management Agent</h1><p>Version `+config.Version+`</p><h2>Endpoints</h2><ul><li><code>GET /health</code></li><li><code>GET /api/v1/status</code></li><li><code>GET /api/v1/files?path=C:\&depth=0</code></li><li><code>GET /api/v1/download?path=C:\path\file.txt</code></li><li><code>GET /api/v1/screenshot?format=png</code></li><li><code>POST /api/v1/exec</code></li></ul><h2>Examples</h2><p><code>curl http://HOST:5032/api/v1/status</code></p><p><code>curl -o screen.png http://HOST:5032/api/v1/screenshot?format=png</code></p><p><code>curl -X POST http://HOST:5032/api/v1/exec -H "Content-Type: application/json" -d "{\"command\":\"ipconfig /all\"}"</code></p></body></html>`)
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}
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func (a *Agent) handleHealth(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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helpers.WriteJSON(w, http.StatusOK, map[string]string{"status": "ok"})
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}
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func (a *Agent) handleOpenAPI(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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helpers.WriteJSON(w, http.StatusOK, map[string]any{
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"openapi": "3.0.3", "info": map[string]string{"title": "Local Management Agent", "version": config.Version},
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"paths": map[string]any{
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"/api/v1/status": map[string]any{"get": map[string]string{"summary": "Agent status"}},
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"/api/v1/files": map[string]any{"get": map[string]string{"summary": "List files"}},
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"/api/v1/download": map[string]any{"get": map[string]string{"summary": "Download file"}},
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"/api/v1/screenshot": map[string]any{"get": map[string]string{"summary": "Capture desktop"}},
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"/api/v1/exec": map[string]any{"post": map[string]string{"summary": "Run a command"}},
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},
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})
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}
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func (a *Agent) handleStatus(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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host, _ := os.Hostname()
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helpers.WriteJSON(w, http.StatusOK, map[string]any{
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"os": "windows", "architecture": runtime.GOARCH, "user": helpers.Username(), "hostname": host,
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"uptime_seconds": int64(time.Since(a.startedAt).Seconds()), "local_ips": helpers.LocalIPs(),
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"agent_version": config.Version, "listen_address": a.addr,
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})
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}
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func (a *Agent) handleFiles(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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depth, err := files.ParseDepth(r.URL.Query().Get("depth"))
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if err != nil {
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helpers.WriteError(w, http.StatusBadRequest, err.Error())
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return
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}
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path := r.URL.Query().Get("path")
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if path == "" {
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path, _ = os.UserHomeDir()
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}
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dir, err := files.AllowedPath(a.root, path, true)
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if err != nil {
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files.WritePathError(w, err)
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return
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}
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info, err := os.Stat(dir)
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if err != nil {
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files.WritePathError(w, err)
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return
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}
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if !info.IsDir() {
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helpers.WriteError(w, http.StatusBadRequest, "path is not a directory")
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return
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}
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entries, err := files.ListDirectory(dir, depth)
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if err != nil {
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files.WritePathError(w, err)
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return
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}
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helpers.WriteJSON(w, http.StatusOK, map[string]any{"path": dir, "depth": depth, "entries": entries})
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}
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func (a *Agent) handleDownload(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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path := r.URL.Query().Get("path")
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if path == "" {
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helpers.WriteError(w, http.StatusBadRequest, "path is required")
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return
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}
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file, err := files.AllowedPath(a.root, path, true)
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if err != nil {
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files.WritePathError(w, err)
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return
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}
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f, err := os.Open(file)
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if err != nil {
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files.WritePathError(w, err)
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return
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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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files.WritePathError(w, err)
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return
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}
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if info.IsDir() {
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helpers.WriteError(w, http.StatusBadRequest, "path is a directory")
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return
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}
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name := filepath.Base(file)
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contentType := mime.TypeByExtension(filepath.Ext(name))
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if contentType == "" {
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var sample [512]byte
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n, _ := f.Read(sample[:])
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contentType = http.DetectContentType(sample[:n])
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_, _ = f.Seek(0, io.SeekStart)
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}
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w.Header().Set("Content-Type", contentType)
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w.Header().Set("Content-Disposition", `attachment; filename="`+strings.ReplaceAll(name, `"`, "'")+`"`)
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w.Header().Set("Accept-Ranges", "bytes")
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http.ServeContent(w, r, name, info.ModTime(), f)
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}
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func (a *Agent) handleScreenshot(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodGet {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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format := strings.ToLower(strings.TrimSpace(r.URL.Query().Get("format")))
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if format == "" {
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format = "png"
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}
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if format != "png" && format != "jpeg" {
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helpers.WriteError(w, http.StatusBadRequest, "format must be png or jpeg")
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return
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}
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quality := 80
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if raw := r.URL.Query().Get("quality"); raw != "" {
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var err error
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quality, err = strconv.Atoi(raw)
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if err != nil || quality < 1 || quality > config.MaxImageQuality {
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helpers.WriteError(w, http.StatusBadRequest, "quality must be between 1 and 100")
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return
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}
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}
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images, err := screenshot.Capture(format, quality)
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if err != nil {
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helpers.Log.Printf("screenshot: %v", err)
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helpers.WriteError(w, http.StatusServiceUnavailable, "no interactive desktop is available")
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return
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}
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if len(images) == 1 {
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w.Header().Set("Content-Type", images[0].ContentType)
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w.Header().Set("Content-Length", strconv.Itoa(len(images[0].Data)))
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_, _ = w.Write(images[0].Data)
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return
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}
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response := models.ScreenshotResponse{Images: make([]models.ScreenshotImage, 0, len(images))}
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for i, item := range images {
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response.Images = append(response.Images, models.ScreenshotImage{
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Monitor: i,
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ContentType: item.ContentType,
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DataBase64: base64.StdEncoding.EncodeToString(item.Data),
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})
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}
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helpers.WriteJSON(w, http.StatusOK, response)
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}
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func (a *Agent) handleExec(w http.ResponseWriter, r *http.Request) {
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if r.Method != http.MethodPost {
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helpers.WriteError(w, http.StatusMethodNotAllowed, "method not allowed")
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return
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}
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r.Body = http.MaxBytesReader(w, r.Body, config.RequestBodyMax)
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defer r.Body.Close()
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var request models.ExecRequest
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decoder := json.NewDecoder(r.Body)
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decoder.DisallowUnknownFields()
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if err := decoder.Decode(&request); err != nil {
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helpers.WriteError(w, http.StatusBadRequest, "body must contain a command")
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return
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}
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cmdline := strings.TrimSpace(request.Command)
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if cmdline == "" {
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helpers.WriteError(w, http.StatusBadRequest, command.ErrEmptyCommand.Error())
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return
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}
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timeout, err := command.ResolveTimeout(request.TimeoutSec)
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if err != nil {
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helpers.WriteError(w, http.StatusBadRequest, err.Error())
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return
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}
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ctx, cancel := context.WithTimeout(r.Context(), timeout)
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defer cancel()
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result, err := command.Run(ctx, cmdline)
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if errors.Is(err, command.ErrTimeout) {
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helpers.WriteError(w, http.StatusGatewayTimeout, err.Error())
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return
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}
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if err != nil {
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helpers.Log.Printf("exec: %v", err)
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helpers.WriteError(w, http.StatusInternalServerError, "could not run command")
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return
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}
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helpers.WriteJSON(w, http.StatusOK, result)
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}
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