Add resumable upload feature with progress display

- Implement chunked file upload with 1MB chunk size
- Add progress bar with percentage and chunk counter (e.g., 2/5)
- Support resuming interrupted uploads
- Improve UI with better progress visualization
- Add dropzone.js integration for drag-and-drop uploads
- Fix progress bar jumping issue in resumable uploads
- Add file type icons and size display
- Enhance error handling and user feedback

main.go

@@ -391,6 +391,22 @@ func uploadFile(c *gin.Context) {
 		path = "."
 	}
 
+	dzuuid := c.PostForm("dzuuid")
+	chunkIndex := c.PostForm("dzchunkindex")
+	totalChunkCount := c.PostForm("dztotalchunkcount")
+	fileName := c.PostForm("dzanonymousfilename")
+
+	isChunked := dzuuid != "" && chunkIndex != ""
+
+	tmpDir := filepath.Join(rootDir, ".tmp", "chunks")
+	if err := os.MkdirAll(tmpDir, 0755); err != nil {
+		c.JSON(http.StatusBadRequest, UploadResponse{
+			Success: false,
+			Message: err.Error(),
+		})
+		return
+	}
+
 	file, header, err := c.Request.FormFile("file")
 	if err != nil {
 		c.JSON(http.StatusBadRequest, UploadResponse{
@@ -401,7 +417,12 @@ func uploadFile(c *gin.Context) {
 	}
 	defer file.Close()
 
-	fullPath := filepath.Join(rootDir, path, header.Filename)
+	targetFileName := header.Filename
+	if fileName != "" {
+		targetFileName = fileName
+	}
+
+	fullPath := filepath.Join(rootDir, path, targetFileName)
 	if !strings.HasPrefix(fullPath, rootDir) {
 		c.JSON(http.StatusBadRequest, UploadResponse{
 			Success: false,
@@ -410,24 +431,98 @@ func uploadFile(c *gin.Context) {
 		return
 	}
 
-	outFile, err := os.Create(fullPath)
-	if err != nil {
-		c.JSON(http.StatusBadRequest, UploadResponse{
-			Success: false,
-			Message: err.Error(),
+	if isChunked {
+		idx := 0
+		fmt.Sscanf(chunkIndex, "%d", &idx)
+		total := 0
+		if totalChunkCount != "" {
+			fmt.Sscanf(totalChunkCount, "%d", &total)
+		}
+
+		chunkDir := filepath.Join(tmpDir, dzuuid)
+		if err := os.MkdirAll(chunkDir, 0755); err != nil {
+			c.JSON(http.StatusBadRequest, UploadResponse{
+				Success: false,
+				Message: err.Error(),
+			})
+			return
+		}
+
+		chunkPath := filepath.Join(chunkDir, fmt.Sprintf("chunk_%d", idx))
+		outFile, err := os.Create(chunkPath)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, UploadResponse{
+				Success: false,
+				Message: err.Error(),
+			})
+			return
+		}
+		defer outFile.Close()
+
+		io.Copy(outFile, file)
+
+		if idx == total-1 && total > 0 {
+			finalFile, err := os.Create(fullPath)
+			if err != nil {
+				os.RemoveAll(chunkDir)
+				c.JSON(http.StatusBadRequest, UploadResponse{
+					Success: false,
+					Message: err.Error(),
+				})
+				return
+			}
+			defer finalFile.Close()
+
+			for i := 0; i < total; i++ {
+				chunkPath := filepath.Join(chunkDir, fmt.Sprintf("chunk_%d", i))
+				chunkFile, err := os.Open(chunkPath)
+				if err != nil {
+					finalFile.Close()
+					os.RemoveAll(chunkDir)
+					c.JSON(http.StatusBadRequest, UploadResponse{
+						Success: false,
+						Message: err.Error(),
+					})
+					return
+				}
+				io.Copy(finalFile, chunkFile)
+				chunkFile.Close()
+				os.Remove(chunkPath)
+			}
+			os.RemoveAll(chunkDir)
+
+			watchChan <- WatchEvent{Type: "create", Path: fullPath, Name: targetFileName}
+
+			c.JSON(http.StatusOK, UploadResponse{
+				Success: true,
+				Message: "上传成功",
+			})
+		} else {
+			c.JSON(http.StatusOK, UploadResponse{
+				Success: true,
+				Message: "分块上传成功",
+			})
+		}
+	} else {
+		outFile, err := os.Create(fullPath)
+		if err != nil {
+			c.JSON(http.StatusBadRequest, UploadResponse{
+				Success: false,
+				Message: err.Error(),
+			})
+			return
+		}
+		defer outFile.Close()
+
+		io.Copy(outFile, file)
+
+		watchChan <- WatchEvent{Type: "create", Path: fullPath, Name: targetFileName}
+
+		c.JSON(http.StatusOK, UploadResponse{
+			Success: true,
+			Message: "上传成功",
 		})
-		return
 	}
-	defer outFile.Close()
-
-	io.Copy(outFile, file)
-
-	watchChan <- WatchEvent{Type: "create", Path: fullPath, Name: header.Filename}
-
-	c.JSON(http.StatusOK, UploadResponse{
-		Success: true,
-		Message: "上传成功",
-	})
 }
 
 func deleteFiles(c *gin.Context) {