feat: create new file page with improved UI, combine upload and download functionality

handler/file/upload/upload.go

@@ -0,0 +1,97 @@
+package uploadHandler
+
+import (
+	"fmt"
+	"github.com/fossyy/filekeeper/app"
+	"github.com/fossyy/filekeeper/types"
+	"io"
+	"net/http"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+)
+
+func POST(w http.ResponseWriter, r *http.Request) {
+	fileID := r.PathValue("id")
+	if err := r.ParseMultipartForm(32 << 20); err != nil {
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	userSession := r.Context().Value("user").(types.User)
+
+	uploadDir := "uploads"
+	if _, err := os.Stat(uploadDir); os.IsNotExist(err) {
+		if err := os.Mkdir(uploadDir, os.ModePerm); err != nil {
+			app.Server.Logger.Error("error getting upload info: " + err.Error())
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+	}
+
+	file, err := app.Server.Service.GetFile(fileID)
+	if err != nil {
+		app.Server.Logger.Error("error getting upload info: " + err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	rawIndex := r.FormValue("index")
+	index, err := strconv.Atoi(rawIndex)
+	if err != nil {
+		return
+	}
+
+	currentDir, err := os.Getwd()
+	if err != nil {
+		app.Server.Logger.Error("unable to get current directory")
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	basePath := filepath.Join(currentDir, uploadDir)
+	cleanBasePath := filepath.Clean(basePath)
+
+	saveFolder := filepath.Join(cleanBasePath, userSession.UserID.String(), file.ID.String(), file.Name)
+
+	cleanSaveFolder := filepath.Clean(saveFolder)
+
+	if !strings.HasPrefix(cleanSaveFolder, cleanBasePath) {
+		app.Server.Logger.Error("invalid path")
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	if _, err := os.Stat(saveFolder); os.IsNotExist(err) {
+		if err := os.MkdirAll(saveFolder, os.ModePerm); err != nil {
+			app.Server.Logger.Error("error creating save folder: " + err.Error())
+			w.WriteHeader(http.StatusInternalServerError)
+			return
+		}
+	}
+
+	fileByte, _, err := r.FormFile("chunk")
+	if err != nil {
+		app.Server.Logger.Error("error getting upload info: " + err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+	defer fileByte.Close()
+
+	dst, err := os.OpenFile(filepath.Join(saveFolder, fmt.Sprintf("chunk_%d", index)), os.O_WRONLY|os.O_APPEND|os.O_CREATE, 0666)
+	if err != nil {
+		app.Server.Logger.Error("error making upload folder: " + err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	defer dst.Close()
+	if _, err := io.Copy(dst, fileByte); err != nil {
+		app.Server.Logger.Error("error copying byte to file dst: " + err.Error())
+		w.WriteHeader(http.StatusInternalServerError)
+		return
+	}
+
+	return
+}