perf(backend): file api for ls and download

backend/internal/api/controller/file.go

@@ -5,7 +5,11 @@ import (
 	"io"
 	"io/fs"
 	"net/http"
+	"os"
 	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
 
 	"github.com/gin-gonic/gin"
 	"github.com/samber/lo"
@@ -13,13 +17,43 @@ import (
 	"go.uber.org/zap"
 
 	"github.com/veops/oneterm/internal/acl"
+	"github.com/veops/oneterm/internal/guacd"
 	"github.com/veops/oneterm/internal/model"
+	"github.com/veops/oneterm/internal/repository"
 	"github.com/veops/oneterm/internal/service"
 	gsession "github.com/veops/oneterm/internal/session"
+	dbpkg "github.com/veops/oneterm/pkg/db"
 	"github.com/veops/oneterm/pkg/errors"
 	"github.com/veops/oneterm/pkg/logger"
 )
 
+func isPermissionError(err error) bool {
+	if err == nil {
+		return false
+	}
+
+	errStr := strings.ToLower(err.Error())
+	permissionKeywords := []string{
+		"permission denied",
+		"access denied",
+		"unauthorized",
+		"forbidden",
+		"not authorized",
+		"insufficient privileges",
+		"operation not permitted",
+		"sftp: permission denied",
+		"ssh: permission denied",
+	}
+
+	for _, keyword := range permissionKeywords {
+		if strings.Contains(errStr, keyword) {
+			return true
+		}
+	}
+
+	return false
+}
+
 // GetFileHistory godoc
 //
 //	@Tags		file
@@ -31,13 +65,13 @@ import (
 //	@Param		end			query		string	false	"end, RFC3339"
 //	@Param		uid			query		int		false	"uid"
 //	@Param		asset_id	query		int		false	"asset id"
-//	@Param		accout_id	query		int		false	"account id"
+//	@Param		account_id	query		int		false	"account id"
 //	@Param		client_ip	query		string	false	"client_ip"
 //	@Success	200			{object}	HttpResponse{data=ListData{list=[]model.Session}}
 //	@Router		/file/history [get]
 func (c *Controller) GetFileHistory(ctx *gin.Context) {
 	// Create filter conditions
-	filters := make(map[string]interface{})
+	filters := make(map[string]any)
 
 	// Get user permissions
 	currentUser, _ := acl.GetSessionFromCtx(ctx)
@@ -112,8 +146,9 @@ func (c *Controller) GetFileHistory(ctx *gin.Context) {
 //	@Param		asset_id	path		int		true	"asset_id"
 //	@Param		account_id	path		int		true	"account_id"
 //	@Param		dir			query		string	true	"dir"
+//	@Param		show_hidden	query		bool	false	"show hidden files (default: false)"
 //	@Success	200			{object}	HttpResponse
-//	@Router		/file/ls/:asset_id/:account_id [post]
+//	@Router		/file/ls/:asset_id/:account_id [GET]
 func (c *Controller) FileLS(ctx *gin.Context) {
 	sess := &gsession.Session{
 		Session: &model.Session{
@@ -133,27 +168,52 @@ func (c *Controller) FileLS(ctx *gin.Context) {
 	// Use global file service
 	info, err := service.DefaultFileService.ReadDir(ctx, sess.Session.AssetId, sess.Session.AccountId, ctx.Query("dir"))
 	if err != nil {
+		if isPermissionError(err) {
+			ctx.AbortWithError(http.StatusForbidden, fmt.Errorf("permission denied"))
+		} else {
 			ctx.AbortWithError(http.StatusBadRequest, &errors.ApiError{Code: errors.ErrInvalidArgument, Data: map[string]any{"err": err}})
+		}
 		return
 	}
 
+	// Filter hidden files unless show_hidden is true
+	showHidden := cast.ToBool(ctx.Query("show_hidden"))
+	if !showHidden {
+		info = lo.Filter(info, func(f fs.FileInfo, _ int) bool {
+			return !strings.HasPrefix(f.Name(), ".")
+		})
+	}
+
 	res := &ListData{
 		Count: int64(len(info)),
 		List: lo.Map(info, func(f fs.FileInfo, _ int) any {
+			var target string
+			if f.Mode()&os.ModeSymlink != 0 {
+				cli, err := service.GetFileManager().GetFileClient(sess.Session.AssetId, sess.Session.AccountId)
+				if err == nil {
+					linkPath := filepath.Join(ctx.Query("dir"), f.Name())
+					if linkTarget, err := cli.ReadLink(linkPath); err == nil {
+						target = linkTarget
+					}
+				}
+			}
 			return &service.FileInfo{
 				Name:    f.Name(),
 				IsDir:   f.IsDir(),
 				Size:    f.Size(),
 				Mode:    f.Mode().String(),
+				IsLink:  f.Mode()&os.ModeSymlink != 0,
+				Target:  target,
+				ModTime: f.ModTime().Format(time.RFC3339),
 			}
 		}),
 	}
 	ctx.JSON(http.StatusOK, NewHttpResponseWithData(res))
 }
 
-// FileMkdir file
+// FileMkdir godoc
 //
-//	@Tags		account
+//	@Tags		file
 //	@Param		asset_id	path		int		true	"asset_id"
 //	@Param		account_id	path		int		true	"account_id"
 //	@Param		dir			query		string	true	"dir "
@@ -276,8 +336,7 @@ func (c *Controller) FileUpload(ctx *gin.Context) {
 //	@Param		asset_id	path		int		true	"asset_id"
 //	@Param		account_id	path		int		true	"account_id"
 //	@Param		dir			query		string	true	"dir"
-//	@Param		filename	query		string	true	"filename"
+//	@Param		names	query		string	true	"names (comma-separated for multiple files)"
-//	@Param		file		formData	string	true	"file field name"
 //	@Success	200			{object}	HttpResponse
 //	@Router		/file/download/:asset_id/:account_id [get]
 func (c *Controller) FileDownload(ctx *gin.Context) {
@@ -298,22 +357,38 @@ func (c *Controller) FileDownload(ctx *gin.Context) {
 		return
 	}
 
-	// Use global file service
+	filenameParam := ctx.Query("names")
-	rf, err := service.DefaultFileService.Open(ctx, sess.Session.AssetId, sess.Session.AccountId, filepath.Join(ctx.Query("dir"), ctx.Query("filename")))
+	if filenameParam == "" {
+		ctx.AbortWithError(http.StatusBadRequest, &errors.ApiError{Code: errors.ErrInvalidArgument, Data: map[string]any{"err": "names parameter is required"}})
+		return
+	}
+
+	filenames := lo.Filter(
+		lo.Map(strings.Split(filenameParam, ","), func(name string, _ int) string {
+			return strings.TrimSpace(name)
+		}),
+		func(name string, _ int) bool {
+			return name != ""
+		},
+	)
+
+	if len(filenames) == 0 {
+		ctx.AbortWithError(http.StatusBadRequest, &errors.ApiError{Code: errors.ErrInvalidArgument, Data: map[string]any{"err": "no valid filenames provided"}})
+		return
+	}
+
+	reader, downloadFilename, fileSize, err := service.DefaultFileService.DownloadMultiple(ctx, sess.Session.AssetId, sess.Session.AccountId, ctx.Query("dir"), filenames)
 	if err != nil {
+		if isPermissionError(err) {
+			ctx.AbortWithError(http.StatusForbidden, &errors.ApiError{Code: errors.ErrNoPerm, Data: map[string]any{"err": err}})
+		} else {
 			ctx.AbortWithError(http.StatusInternalServerError, &errors.ApiError{Code: errors.ErrInvalidArgument, Data: map[string]any{"err": err}})
+		}
 		return
 	}
+	defer reader.Close()
 
-	defer rf.Close()
+	// Record file operation history
-
-	content, err := io.ReadAll(rf)
-	if err != nil {
-		ctx.AbortWithError(http.StatusInternalServerError, &errors.ApiError{Code: errors.ErrInternal, Data: map[string]any{"err": err}})
-		return
-	}
-
-	// Create history record
 	h := &model.FileHistory{
 		Uid:       currentUser.GetUid(),
 		UserName:  currentUser.GetUserName(),
@@ -322,16 +397,421 @@ func (c *Controller) FileDownload(ctx *gin.Context) {
 		ClientIp:  ctx.ClientIP(),
 		Action:    model.FILE_ACTION_DOWNLOAD,
 		Dir:       ctx.Query("dir"),
-		Filename:  ctx.Query("filename"),
+		Filename:  strings.Join(filenames, ","),
+		CreatedAt: time.Now(),
+	}
+	service.DefaultFileService.AddFileHistory(ctx, h)
+
+	// Set response headers for file download
+	ctx.Header("Content-Type", "application/octet-stream")
+	ctx.Header("Content-Disposition", fmt.Sprintf("attachment; filename=%s", downloadFilename))
+	ctx.Header("Cache-Control", "no-cache, no-store, must-revalidate")
+	ctx.Header("Pragma", "no-cache")
+	ctx.Header("Expires", "0")
+
+	// Set content length if known
+	if fileSize > 0 {
+		ctx.Header("Content-Length", fmt.Sprintf("%d", fileSize))
 	}
 
-	if err = service.DefaultFileService.AddFileHistory(ctx, h); err != nil {
+	// Stream file content directly to response
-		logger.L().Error("record download failed", zap.Error(err), zap.Any("history", h))
+	ctx.Status(http.StatusOK)
+
+	// Use streaming copy with buffer to handle large files efficiently
+	buffer := make([]byte, 32*1024) // 32KB buffer for optimal performance
+	_, err = io.CopyBuffer(ctx.Writer, reader, buffer)
+	if err != nil {
+		logger.L().Error("File transfer failed", zap.Error(err))
+	}
 }
 
-	rw := ctx.Writer
+// RDP File Transfer Methods
-	rw.Header().Set("Content-Disposition", fmt.Sprintf("attachment; filename=%s", ctx.Query("filename")))
+
-	rw.Header().Set("Content-Type", "application/octet-stream")
+// RDPFileInfo represents file information for RDP sessions
-	rw.Header().Set("Content-Length", fmt.Sprintf("%d", len(content)))
+type RDPFileInfo struct {
-	rw.Write(content)
+	Name    string `json:"name"`
+	Size    int64  `json:"size"`
+	IsDir   bool   `json:"is_dir"`
+	ModTime string `json:"mod_time"`
+}
+
+// RDPMkdirRequest represents directory creation request for RDP
+type RDPMkdirRequest struct {
+	Path string `json:"path" binding:"required"`
+}
+
+// RDPFileList lists files in RDP session drive
+// @Summary List RDP session files
+// @Description Get file list for RDP session drive
+// @Tags RDP File
+// @Param session_id path string true "Session ID"
+// @Param path query string false "Directory path"
+// @Success	200			{object}	HttpResponse
+// @Router /api/v1/rdp/sessions/{session_id}/files [get]
+func (c *Controller) RDPFileList(ctx *gin.Context) {
+	sessionId := ctx.Param("session_id")
+	path := ctx.DefaultQuery("path", "/")
+
+	// Check if session exists and user has permission
+	if !c.hasRDPSessionPermission(ctx, sessionId) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "No permission to access this session",
+		})
+		return
+	}
+
+	// Get session tunnel
+	tunnel := c.getRDPSessionTunnel(sessionId)
+	if tunnel == nil {
+		ctx.JSON(http.StatusNotFound, HttpResponse{
+			Code:    http.StatusNotFound,
+			Message: "Session not found or not active",
+		})
+		return
+	}
+
+	// Check if RDP drive is enabled
+	if !c.isRDPDriveEnabled(tunnel) {
+		ctx.JSON(http.StatusBadRequest, HttpResponse{
+			Code:    http.StatusBadRequest,
+			Message: "RDP drive is not enabled for this session",
+		})
+		return
+	}
+
+	// Send file list request through Guacamole protocol
+	files, err := c.requestRDPFileList(tunnel, path)
+	if err != nil {
+		logger.L().Error("Failed to get RDP file list", zap.Error(err))
+		ctx.JSON(http.StatusInternalServerError, HttpResponse{
+			Code:    http.StatusInternalServerError,
+			Message: "Failed to get file list",
+		})
+		return
+	}
+
+	ctx.JSON(http.StatusOK, HttpResponse{
+		Code:    0,
+		Message: "ok",
+		Data:    files,
+	})
+}
+
+// RDPFileUpload uploads file to RDP session drive
+// @Summary Upload file to RDP session
+// @Description Upload file to RDP session drive
+// @Tags RDP File
+// @Accept multipart/form-data
+// @Param session_id path string true "Session ID"
+// @Param file formData file true "File to upload"
+// @Param path formData string false "Target directory path"
+// @Success 200 {object} HttpResponse
+// @Router /api/v1/rdp/sessions/{session_id}/files/upload [post]
+func (c *Controller) RDPFileUpload(ctx *gin.Context) {
+	sessionId := ctx.Param("session_id")
+	targetPath := ctx.DefaultPostForm("path", "/")
+
+	// Check permission
+	if !c.hasRDPSessionPermission(ctx, sessionId) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "No permission to access this session",
+		})
+		return
+	}
+
+	// Get uploaded file
+	file, header, err := ctx.Request.FormFile("file")
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, HttpResponse{
+			Code:    http.StatusBadRequest,
+			Message: "Failed to get uploaded file",
+		})
+		return
+	}
+	defer file.Close()
+
+	// Get session tunnel
+	tunnel := c.getRDPSessionTunnel(sessionId)
+	if tunnel == nil {
+		ctx.JSON(http.StatusNotFound, HttpResponse{
+			Code:    http.StatusNotFound,
+			Message: "Session not found or not active",
+		})
+		return
+	}
+
+	// Check if upload is allowed
+	if !c.isRDPUploadAllowed(tunnel) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "File upload is disabled for this session",
+		})
+		return
+	}
+
+	// Read file content
+	content, err := io.ReadAll(file)
+	if err != nil {
+		ctx.JSON(http.StatusInternalServerError, HttpResponse{
+			Code:    http.StatusInternalServerError,
+			Message: "Failed to read file content",
+		})
+		return
+	}
+
+	// Send upload request through Guacamole protocol
+	fullPath := filepath.Join(targetPath, header.Filename)
+	err = c.uploadRDPFile(tunnel, fullPath, content)
+	if err != nil {
+		logger.L().Error("Failed to upload file to RDP session", zap.Error(err))
+		ctx.JSON(http.StatusInternalServerError, HttpResponse{
+			Code:    http.StatusInternalServerError,
+			Message: "Failed to upload file",
+		})
+		return
+	}
+
+	// Record file operation history
+	c.recordRDPFileHistory(ctx, sessionId, "upload", fullPath, int64(len(content)))
+
+	ctx.JSON(http.StatusOK, HttpResponse{
+		Code:    0,
+		Message: "ok",
+		Data: gin.H{
+			"message": "File uploaded successfully",
+			"path":    fullPath,
+			"size":    len(content),
+		},
+	})
+}
+
+// RDPFileDownload downloads file from RDP session drive
+// @Summary Download file from RDP session
+// @Description Download file from RDP session drive
+// @Tags RDP File
+// @Accept json
+// @Produce application/octet-stream
+// @Param session_id path string true "Session ID"
+// @Param path query string true "File path"
+// @Success 200 {file} binary
+// @Router /api/v1/rdp/sessions/{session_id}/files/download [get]
+func (c *Controller) RDPFileDownload(ctx *gin.Context) {
+	sessionId := ctx.Param("session_id")
+	filePath := ctx.Query("path")
+
+	if filePath == "" {
+		ctx.JSON(http.StatusBadRequest, HttpResponse{
+			Code:    http.StatusBadRequest,
+			Message: "File path is required",
+		})
+		return
+	}
+
+	// Check permission
+	if !c.hasRDPSessionPermission(ctx, sessionId) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "No permission to access this session",
+		})
+		return
+	}
+
+	// Get session tunnel
+	tunnel := c.getRDPSessionTunnel(sessionId)
+	if tunnel == nil {
+		ctx.JSON(http.StatusNotFound, HttpResponse{
+			Code:    http.StatusNotFound,
+			Message: "Session not found or not active",
+		})
+		return
+	}
+
+	// Check if download is allowed
+	if !c.isRDPDownloadAllowed(tunnel) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "File download is disabled for this session",
+		})
+		return
+	}
+
+	// Request file download through Guacamole protocol
+	content, err := c.downloadRDPFile(tunnel, filePath)
+	if err != nil {
+		logger.L().Error("Failed to download file from RDP session", zap.Error(err))
+		ctx.JSON(http.StatusInternalServerError, HttpResponse{
+			Code:    http.StatusInternalServerError,
+			Message: "Failed to download file",
+		})
+		return
+	}
+
+	// Record file operation history
+	c.recordRDPFileHistory(ctx, sessionId, "download", filePath, int64(len(content)))
+
+	// Set response headers
+	filename := filepath.Base(filePath)
+	ctx.Header("Content-Disposition", fmt.Sprintf("attachment; filename=\"%s\"", filename))
+	ctx.Header("Content-Type", "application/octet-stream")
+	ctx.Header("Content-Length", strconv.Itoa(len(content)))
+
+	ctx.Data(http.StatusOK, "application/octet-stream", content)
+}
+
+// RDPFileMkdir creates directory in RDP session drive
+// @Summary Create directory in RDP session
+// @Description Create directory in RDP session drive
+// @Tags RDP File
+// @Accept json
+// @Produce json
+// @Param session_id path string true "Session ID"
+// @Param request body RDPMkdirRequest true "Directory creation request"
+// @Success 200 {object} HttpResponse
+// @Router /api/v1/rdp/sessions/{session_id}/files/mkdir [post]
+func (c *Controller) RDPFileMkdir(ctx *gin.Context) {
+	sessionId := ctx.Param("session_id")
+
+	var req RDPMkdirRequest
+	if err := ctx.ShouldBindJSON(&req); err != nil {
+		ctx.JSON(http.StatusBadRequest, HttpResponse{
+			Code:    http.StatusBadRequest,
+			Message: "Invalid request parameters",
+		})
+		return
+	}
+
+	// Check permission
+	if !c.hasRDPSessionPermission(ctx, sessionId) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "No permission to access this session",
+		})
+		return
+	}
+
+	// Get session tunnel
+	tunnel := c.getRDPSessionTunnel(sessionId)
+	if tunnel == nil {
+		ctx.JSON(http.StatusNotFound, HttpResponse{
+			Code:    http.StatusNotFound,
+			Message: "Session not found or not active",
+		})
+		return
+	}
+
+	// Check if upload is allowed (mkdir is considered an upload operation)
+	if !c.isRDPUploadAllowed(tunnel) {
+		ctx.JSON(http.StatusForbidden, HttpResponse{
+			Code:    http.StatusForbidden,
+			Message: "Directory creation is disabled for this session",
+		})
+		return
+	}
+
+	// Send mkdir request through Guacamole protocol
+	err := c.createRDPDirectory(tunnel, req.Path)
+	if err != nil {
+		logger.L().Error("Failed to create directory in RDP session", zap.Error(err))
+		ctx.JSON(http.StatusInternalServerError, HttpResponse{
+			Code:    http.StatusInternalServerError,
+			Message: "Failed to create directory",
+		})
+		return
+	}
+
+	// Record file operation history
+	c.recordRDPFileHistory(ctx, sessionId, "mkdir", req.Path, 0)
+
+	ctx.JSON(http.StatusOK, HttpResponse{
+		Code:    0,
+		Message: "ok",
+		Data: gin.H{
+			"message": "Directory created successfully",
+			"path":    req.Path,
+		},
+	})
+}
+
+// RDP Helper methods
+
+func (c *Controller) hasRDPSessionPermission(ctx *gin.Context, sessionId string) bool {
+	// TODO: Implement proper session permission check
+	// This should verify that the current user has access to the specified session
+	return true
+}
+
+func (c *Controller) getRDPSessionTunnel(sessionId string) *guacd.Tunnel {
+	// TODO: Implement session tunnel retrieval
+	// This should get the active Guacamole tunnel for the session
+	return nil
+}
+
+func (c *Controller) isRDPDriveEnabled(tunnel *guacd.Tunnel) bool {
+	// Check if RDP drive is enabled in tunnel configuration
+	return tunnel.Config.Parameters["enable-drive"] == "true"
+}
+
+func (c *Controller) isRDPUploadAllowed(tunnel *guacd.Tunnel) bool {
+	return tunnel.Config.Parameters["disable-upload"] != "true"
+}
+
+func (c *Controller) isRDPDownloadAllowed(tunnel *guacd.Tunnel) bool {
+	return tunnel.Config.Parameters["disable-download"] != "true"
+}
+
+func (c *Controller) requestRDPFileList(tunnel *guacd.Tunnel, path string) ([]RDPFileInfo, error) {
+	// TODO: Implement Guacamole protocol communication for file listing
+	// This would involve sending appropriate Guacamole instructions and parsing responses
+	return nil, fmt.Errorf("not implemented: RDP file listing through Guacamole protocol")
+}
+
+func (c *Controller) uploadRDPFile(tunnel *guacd.Tunnel, path string, content []byte) error {
+	// TODO: Implement Guacamole protocol communication for file upload
+	// This would involve sending file-upload instruction with base64 encoded content
+	return fmt.Errorf("not implemented: RDP file upload through Guacamole protocol")
+}
+
+func (c *Controller) downloadRDPFile(tunnel *guacd.Tunnel, path string) ([]byte, error) {
+	// TODO: Implement Guacamole protocol communication for file download
+	// This would involve sending file-download instruction and receiving file data
+	return nil, fmt.Errorf("not implemented: RDP file download through Guacamole protocol")
+}
+
+func (c *Controller) createRDPDirectory(tunnel *guacd.Tunnel, path string) error {
+	// TODO: Implement Guacamole protocol communication for directory creation
+	return fmt.Errorf("not implemented: RDP directory creation through Guacamole protocol")
+}
+
+func (c *Controller) recordRDPFileHistory(ctx *gin.Context, sessionId, operation, path string, size int64) {
+	// Record file operation in history
+	history := &model.FileHistory{
+		Uid:       0,  // TODO: Get current user ID
+		UserName:  "", // TODO: Get current user name
+		AssetId:   0,  // TODO: Get asset ID from session
+		AccountId: 0,  // TODO: Get account ID from session
+		ClientIp:  ctx.ClientIP(),
+		Action:    c.getRDPActionCode(operation),
+		Dir:       filepath.Dir(path),
+		Filename:  filepath.Base(path),
+	}
+
+	fileService := service.NewFileService(repository.NewFileRepository(dbpkg.DB))
+	if err := fileService.AddFileHistory(ctx, history); err != nil {
+		logger.L().Error("Failed to record RDP file history", zap.Error(err))
+	}
+}
+
+func (c *Controller) getRDPActionCode(operation string) int {
+	switch operation {
+	case "upload":
+		return model.FILE_ACTION_UPLOAD
+	case "download":
+		return model.FILE_ACTION_DOWNLOAD
+	case "mkdir":
+		return model.FILE_ACTION_MKDIR
+	default:
+		return model.FILE_ACTION_LS
+	}
 }

backend/internal/service/file.go

@@ -1,21 +1,25 @@
 package service
 
 import (
+	"archive/zip"
 	"context"
 	"fmt"
 	"io"
 	"io/fs"
+	"path/filepath"
+	"strings"
 	"sync"
 	"time"
 
 	"github.com/google/uuid"
 	"github.com/pkg/sftp"
-	"golang.org/x/crypto/ssh"
-
 	"github.com/veops/oneterm/internal/model"
 	"github.com/veops/oneterm/internal/repository"
 	"github.com/veops/oneterm/internal/tunneling"
 	dbpkg "github.com/veops/oneterm/pkg/db"
+	"github.com/veops/oneterm/pkg/logger"
+	"go.uber.org/zap"
+	"golang.org/x/crypto/ssh"
 )
 
 var (
@@ -65,6 +69,9 @@ type FileInfo struct {
 	IsDir   bool   `json:"is_dir"`
 	Size    int64  `json:"size"`
 	Mode    string `json:"mode"`
+	IsLink  bool   `json:"is_link"`
+	Target  string `json:"target"`
+	ModTime string `json:"mod_time"`
 }
 
 func GetFileManager() *FileManager {
@@ -122,8 +129,16 @@ type IFileService interface {
 	MkdirAll(ctx context.Context, assetId, accountId int, dir string) error
 	Create(ctx context.Context, assetId, accountId int, path string) (io.WriteCloser, error)
 	Open(ctx context.Context, assetId, accountId int, path string) (io.ReadCloser, error)
+	Stat(ctx context.Context, assetId, accountId int, path string) (fs.FileInfo, error)
+	DownloadMultiple(ctx context.Context, assetId, accountId int, dir string, filenames []string) (io.ReadCloser, string, int64, error)
 	AddFileHistory(ctx context.Context, history *model.FileHistory) error
 	GetFileHistory(ctx context.Context, filters map[string]interface{}) ([]*model.FileHistory, int64, error)
+
+	// RDP file transfer methods
+	RDPReadDir(ctx context.Context, sessionId, dir string) ([]fs.FileInfo, error)
+	RDPMkdirAll(ctx context.Context, sessionId, dir string) error
+	RDPUploadFile(ctx context.Context, sessionId, filename string, content []byte) error
+	RDPDownloadFile(ctx context.Context, sessionId, filename string) ([]byte, error)
 }
 
 // File service implementation
@@ -161,6 +176,7 @@ func (s *FileService) Create(ctx context.Context, assetId, accountId int, path s
 	if err != nil {
 		return nil, err
 	}
+
 	return cli.Create(path)
 }
 
@@ -170,9 +186,159 @@ func (s *FileService) Open(ctx context.Context, assetId, accountId int, path str
 	if err != nil {
 		return nil, err
 	}
+
 	return cli.Open(path)
 }
 
+// Stat gets file/directory information
+func (s *FileService) Stat(ctx context.Context, assetId, accountId int, path string) (fs.FileInfo, error) {
+	cli, err := GetFileManager().GetFileClient(assetId, accountId)
+	if err != nil {
+		return nil, err
+	}
+
+	return cli.Stat(path)
+}
+
+// DownloadMultiple handles downloading single file or multiple files/directories as ZIP
+func (s *FileService) DownloadMultiple(ctx context.Context, assetId, accountId int, dir string, filenames []string) (io.ReadCloser, string, int64, error) {
+	cli, err := GetFileManager().GetFileClient(assetId, accountId)
+	if err != nil {
+		return nil, "", 0, err
+	}
+
+	// Validate and sanitize all filenames for security
+	var sanitizedFilenames []string
+	for _, filename := range filenames {
+		sanitized, err := sanitizeFilename(filename)
+		if err != nil {
+			return nil, "", 0, fmt.Errorf("invalid filename '%s': %v", filename, err)
+		}
+
+		sanitizedFilenames = append(sanitizedFilenames, sanitized)
+	}
+
+	// If only one file, check if it's a regular file first
+	if len(sanitizedFilenames) == 1 {
+		fullPath := filepath.Join(dir, sanitizedFilenames[0])
+		fileInfo, err := cli.Stat(fullPath)
+		if err != nil {
+			return nil, "", 0, err
+		}
+
+		// If it's a regular file, return directly
+		if !fileInfo.IsDir() {
+			reader, err := cli.Open(fullPath)
+			if err != nil {
+				return nil, "", 0, err
+			}
+			return reader, sanitizedFilenames[0], fileInfo.Size(), nil
+		}
+	}
+
+	// Multiple files or contains directory, create ZIP
+	return s.createZipArchive(cli, dir, sanitizedFilenames)
+}
+
+// createZipArchive creates a ZIP archive containing the specified files/directories
+func (s *FileService) createZipArchive(cli *sftp.Client, baseDir string, filenames []string) (io.ReadCloser, string, int64, error) {
+	// Generate ZIP filename
+	var zipName string
+	if len(filenames) == 1 {
+		zipName = filenames[0] + ".zip"
+	} else {
+		zipName = "download.zip"
+	}
+
+	// Use pipe for true streaming without memory buffering
+	pipeReader, pipeWriter := io.Pipe()
+
+	// Create ZIP in a separate goroutine
+	go func() {
+		defer pipeWriter.Close()
+
+		zipWriter := zip.NewWriter(pipeWriter)
+		defer zipWriter.Close()
+
+		// Add each file/directory to ZIP
+		for _, filename := range filenames {
+			fullPath := filepath.Join(baseDir, filename)
+
+			if err := s.addToZip(cli, zipWriter, baseDir, filename, fullPath); err != nil {
+				logger.L().Error("Failed to add file to ZIP", zap.String("path", fullPath), zap.Error(err))
+				pipeWriter.CloseWithError(err)
+				return
+			}
+		}
+	}()
+
+	// Return pipe reader for streaming, size unknown (-1)
+	return pipeReader, zipName, -1, nil
+}
+
+// addToZip recursively adds files/directories to ZIP archive
+func (s *FileService) addToZip(cli *sftp.Client, zipWriter *zip.Writer, baseDir, relativePath, fullPath string) error {
+	fileInfo, err := cli.Stat(fullPath)
+	if err != nil {
+		return err
+	}
+
+	if fileInfo.IsDir() {
+		// Add directory
+		return s.addDirToZip(cli, zipWriter, fullPath, relativePath)
+	} else {
+		// Add file
+		return s.addFileToZip(cli, zipWriter, fullPath, relativePath)
+	}
+}
+
+// addFileToZip adds a single file to ZIP archive
+func (s *FileService) addFileToZip(cli *sftp.Client, zipWriter *zip.Writer, fullPath, relativePath string) error {
+	// Open remote file
+	file, err := cli.Open(fullPath)
+	if err != nil {
+		return err
+	}
+	defer file.Close()
+
+	// Create file in ZIP
+	zipFile, err := zipWriter.Create(relativePath)
+	if err != nil {
+		return err
+	}
+
+	// Copy file content
+	_, err = io.Copy(zipFile, file)
+	return err
+}
+
+// addDirToZip recursively adds a directory to ZIP archive
+func (s *FileService) addDirToZip(cli *sftp.Client, zipWriter *zip.Writer, fullPath, relativePath string) error {
+	// Read directory contents
+	entries, err := cli.ReadDir(fullPath)
+	if err != nil {
+		return err
+	}
+
+	// If directory is empty, create directory entry
+	if len(entries) == 0 {
+		_, err := zipWriter.Create(relativePath + "/")
+		return err
+	}
+
+	// Recursively add each entry in the directory
+	for _, entry := range entries {
+		entryFullPath := filepath.Join(fullPath, entry.Name())
+		entryRelativePath := filepath.Join(relativePath, entry.Name())
+
+		if err := s.addToZip(cli, zipWriter, fullPath, entryRelativePath, entryFullPath); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 // AddFileHistory adds a file history record
 func (s *FileService) AddFileHistory(ctx context.Context, history *model.FileHistory) error {
 	return s.repo.AddFileHistory(ctx, history)
@@ -182,3 +348,65 @@ func (s *FileService) AddFileHistory(ctx context.Context, history *model.FileHis
 func (s *FileService) GetFileHistory(ctx context.Context, filters map[string]interface{}) ([]*model.FileHistory, int64, error) {
 	return s.repo.GetFileHistory(ctx, filters)
 }
+
+// RDP file transfer methods implementation
+
+// RDPReadDir reads directory contents for RDP session
+func (s *FileService) RDPReadDir(ctx context.Context, sessionId, dir string) ([]fs.FileInfo, error) {
+	// Get session tunnel to access file transfer manager
+	tunnel := tunneling.GetTunnelBySessionId(sessionId)
+	if tunnel == nil {
+		return nil, fmt.Errorf("session not found: %s", sessionId)
+	}
+
+	// For RDP sessions, we need to check if drive is enabled
+	// This would need to be implemented based on the actual session configuration
+	// For now, return an error indicating RDP file operations need to be handled differently
+	return nil, fmt.Errorf("RDP file operations should be handled through Guacamole protocol")
+}
+
+// RDPMkdirAll creates directory for RDP session
+func (s *FileService) RDPMkdirAll(ctx context.Context, sessionId, dir string) error {
+	tunnel := tunneling.GetTunnelBySessionId(sessionId)
+	if tunnel == nil {
+		return fmt.Errorf("session not found: %s", sessionId)
+	}
+
+	return fmt.Errorf("RDP file operations should be handled through Guacamole protocol")
+}
+
+// RDPUploadFile uploads file for RDP session
+func (s *FileService) RDPUploadFile(ctx context.Context, sessionId, filename string, content []byte) error {
+	tunnel := tunneling.GetTunnelBySessionId(sessionId)
+	if tunnel == nil {
+		return fmt.Errorf("session not found: %s", sessionId)
+	}
+
+	return fmt.Errorf("RDP file operations should be handled through Guacamole protocol")
+}
+
+// RDPDownloadFile downloads file for RDP session
+func (s *FileService) RDPDownloadFile(ctx context.Context, sessionId, filename string) ([]byte, error) {
+	tunnel := tunneling.GetTunnelBySessionId(sessionId)
+	if tunnel == nil {
+		return nil, fmt.Errorf("session not found: %s", sessionId)
+	}
+
+	return nil, fmt.Errorf("RDP file operations should be handled through Guacamole protocol")
+}
+
+func sanitizeFilename(filename string) (string, error) {
+	// Remove any path traversal attempts
+	if strings.Contains(filename, "..") ||
+		strings.Contains(filename, "/") ||
+		strings.Contains(filename, "\\") {
+		return "", fmt.Errorf("invalid filename: path traversal detected")
+	}
+
+	// Remove null bytes and control characters
+	if strings.ContainsAny(filename, "\x00\x01\x02\x03\x04\x05\x06\x07\x08\x09\x0a\x0b\x0c\x0d\x0e\x0f") {
+		return "", fmt.Errorf("invalid filename: control characters detected")
+	}
+
+	return filename, nil
+}