fix: memory leak while uploading files by disabling base64 encoding of chunks

backend/src/file/file.controller.ts

@@ -27,17 +27,14 @@ export class FileController {
   @UseGuards(CreateShareGuard, ShareOwnerGuard)
   async create(
     @Query() query: any,
-
     @Body() body: string,
     @Param("shareId") shareId: string,
   ) {
     const { id, name, chunkIndex, totalChunks } = query;
 
     // Data can be empty if the file is empty
-    const data = body.toString().split(",")[1] ?? "";
-
     return await this.fileService.create(
-      data,
+      body,
       { index: parseInt(chunkIndex), total: parseInt(totalChunks) },
       { id, name },
       shareId,

frontend/src/components/upload/EditableUpload.tsx

@@ -1,22 +1,19 @@
 import { Button, Group } from "@mantine/core";
-import { useModals } from "@mantine/modals";
 import { cleanNotifications } from "@mantine/notifications";
 import { AxiosError } from "axios";
+import { useRouter } from "next/router";
 import pLimit from "p-limit";
-import { useEffect, useMemo, useState } from "react";
+import { useEffect, useMemo, useRef, useState } from "react";
 import { FormattedMessage } from "react-intl";
 import Dropzone from "../../components/upload/Dropzone";
 import FileList from "../../components/upload/FileList";
-import showCompletedUploadModal from "../../components/upload/modals/showCompletedUploadModal";
 import useConfig from "../../hooks/config.hook";
 import useTranslate from "../../hooks/useTranslate.hook";
 import shareService from "../../services/share.service";
 import { FileListItem, FileMetaData, FileUpload } from "../../types/File.type";
 import toast from "../../utils/toast.util";
-import { useRouter } from "next/router";
 
 const promiseLimit = pLimit(3);
-const chunkSize = 10 * 1024 * 1024; // 10MB
 let errorToastShown = false;
 
 const EditableUpload = ({
@@ -33,6 +30,8 @@ const EditableUpload = ({
   const router = useRouter();
   const config = useConfig();
 
+  const chunkSize = useRef(parseInt(config.get("share.chunkSize")));
+
   const [existingFiles, setExistingFiles] =
     useState<Array<FileMetaData & { deleted?: boolean }>>(savedFiles);
   const [uploadingFiles, setUploadingFiles] = useState<FileUpload[]>([]);
@@ -66,7 +65,7 @@ const EditableUpload = ({
     const fileUploadPromises = files.map(async (file, fileIndex) =>
       // Limit the number of concurrent uploads to 3
       promiseLimit(async () => {
-        let fileId: string;
+        let fileId: string | undefined;
 
         const setFileProgress = (progress: number) => {
           setUploadingFiles((files) =>
@@ -81,23 +80,20 @@ const EditableUpload = ({
 
         setFileProgress(1);
 
-        let chunks = Math.ceil(file.size / chunkSize);
+        let chunks = Math.ceil(file.size / chunkSize.current);
 
         // If the file is 0 bytes, we still need to upload 1 chunk
         if (chunks == 0) chunks++;
 
         for (let chunkIndex = 0; chunkIndex < chunks; chunkIndex++) {
-          const from = chunkIndex * chunkSize;
+          const from = chunkIndex * chunkSize.current;
-          const to = from + chunkSize;
+          const to = from + chunkSize.current;
           const blob = file.slice(from, to);
           try {
-            await new Promise((resolve, reject) => {
-              const reader = new FileReader();
-              reader.onload = async (event) =>
             await shareService
               .uploadFile(
                 shareId,
-                    event,
+                blob,
                 {
                   id: fileId,
                   name: file.name,
@@ -107,11 +103,6 @@ const EditableUpload = ({
               )
               .then((response) => {
                 fileId = response.id;
-                    resolve(response);
-                  })
-                  .catch(reject);
-
-              reader.readAsDataURL(blob);
               });
 
             setFileProgress(((chunkIndex + 1) / chunks) * 100);

frontend/src/pages/upload/index.tsx

@@ -3,7 +3,7 @@ import { useModals } from "@mantine/modals";
 import { cleanNotifications } from "@mantine/notifications";
 import { AxiosError } from "axios";
 import pLimit from "p-limit";
-import { useEffect, useState } from "react";
+import { useEffect, useRef, useState } from "react";
 import { FormattedMessage } from "react-intl";
 import Meta from "../../components/Meta";
 import Dropzone from "../../components/upload/Dropzone";
@@ -19,7 +19,6 @@ import { CreateShare, Share } from "../../types/share.type";
 import toast from "../../utils/toast.util";
 
 const promiseLimit = pLimit(3);
-const chunkSize = 10 * 1024 * 1024; // 10MB
 let errorToastShown = false;
 let createdShare: Share;
 
@@ -38,6 +37,8 @@ const Upload = ({
   const [files, setFiles] = useState<FileUpload[]>([]);
   const [isUploading, setisUploading] = useState(false);
 
+  const chunkSize = useRef(parseInt(config.get("share.chunkSize")));
+
   maxShareSize ??= parseInt(config.get("share.maxSize"));
 
   const uploadFiles = async (share: CreateShare, files: FileUpload[]) => {
@@ -54,7 +55,7 @@ const Upload = ({
     const fileUploadPromises = files.map(async (file, fileIndex) =>
       // Limit the number of concurrent uploads to 3
       promiseLimit(async () => {
-        let fileId: string;
+        let fileId;
 
         const setFileProgress = (progress: number) => {
           setFiles((files) =>
@@ -69,23 +70,20 @@ const Upload = ({
 
         setFileProgress(1);
 
-        let chunks = Math.ceil(file.size / chunkSize);
+        let chunks = Math.ceil(file.size / chunkSize.current);
 
         // If the file is 0 bytes, we still need to upload 1 chunk
         if (chunks == 0) chunks++;
 
         for (let chunkIndex = 0; chunkIndex < chunks; chunkIndex++) {
-          const from = chunkIndex * chunkSize;
+          const from = chunkIndex * chunkSize.current;
-          const to = from + chunkSize;
+          const to = from + chunkSize.current;
           const blob = file.slice(from, to);
           try {
-            await new Promise((resolve, reject) => {
-              const reader = new FileReader();
-              reader.onload = async (event) =>
             await shareService
               .uploadFile(
                 createdShare.id,
-                    event,
+                blob,
                 {
                   id: fileId,
                   name: file.name,
@@ -95,11 +93,6 @@ const Upload = ({
               )
               .then((response) => {
                 fileId = response.id;
-                    resolve(response);
-                  })
-                  .catch(reject);
-
-              reader.readAsDataURL(blob);
               });
 
             setFileProgress(((chunkIndex + 1) / chunks) * 100);

frontend/src/services/share.service.ts

@@ -77,7 +77,7 @@ const removeFile = async (shareId: string, fileId: string) => {
 
 const uploadFile = async (
   shareId: string,
-  readerEvent: ProgressEvent<FileReader>,
+  chunk: Blob,
   file: {
     id?: string;
     name: string;
@@ -85,10 +85,8 @@ const uploadFile = async (
   chunkIndex: number,
   totalChunks: number,
 ): Promise<FileUploadResponse> => {
-  const data = readerEvent.target!.result;
-
   return (
-    await api.post(`shares/${shareId}/files`, data, {
+    await api.post(`shares/${shareId}/files`, chunk, {
       headers: { "Content-Type": "application/octet-stream" },
       params: {
         id: file.id,