fix: File attachments have no content when exporting room messages as file

.changeset/lucky-vans-develop.md

@@ -0,0 +1,5 @@
+---
+"@rocket.chat/meteor": patch
+---
+
+Fixed issue with file attachments in rooms' messages export having no content

apps/meteor/app/file-upload/server/config/AmazonS3.ts

@@ -32,12 +32,15 @@ const get: FileUploadClass['get'] = async function (this: FileUploadClass, file,
 
 const copy: FileUploadClass['copy'] = async function (this: FileUploadClass, file, out) {
 	const fileUrl = await this.store.getRedirectURL(file);
-	if (fileUrl) {
-		const request = /^https:/.test(fileUrl) ? https : http;
-		request.get(fileUrl, (fileRes) => fileRes.pipe(out));
-	} else {
+	if (!fileUrl) {
 		out.end();
+		return;
 	}
+
+	const request = /^https:/.test(fileUrl) ? https : http;
+	return new Promise((resolve) => {
+		request.get(fileUrl, (fileRes) => fileRes.pipe(out).on('finish', () => resolve()));
+	});
 };
 
 const AmazonS3Uploads = new FileUploadClass({

apps/meteor/app/file-upload/server/config/GoogleStorage.ts

@@ -32,12 +32,15 @@ const get: FileUploadClass['get'] = async function (this: FileUploadClass, file,
 const copy: FileUploadClass['copy'] = async function (this: FileUploadClass, file, out) {
 	const fileUrl = await this.store.getRedirectURL(file, false);
 
-	if (fileUrl) {
-		const request = /^https:/.test(fileUrl) ? https : http;
-		request.get(fileUrl, (fileRes) => fileRes.pipe(out));
-	} else {
+	if (!fileUrl) {
 		out.end();
+		return;
 	}
+
+	const request = /^https:/.test(fileUrl) ? https : http;
+	return new Promise((resolve) => {
+		request.get(fileUrl, (fileRes) => fileRes.pipe(out).on('finish', () => resolve()));
+	});
 };
 
 const GoogleCloudStorageUploads = new FileUploadClass({

apps/meteor/app/file-upload/server/config/Webdav.ts

@@ -19,7 +19,9 @@ const get: FileUploadClass['get'] = async function (this: FileUploadClass, file,
 };
 
 const copy: FileUploadClass['copy'] = async function (this: FileUploadClass, file, out) {
-	(await this.store.getReadStream(file._id, file)).pipe(out);
+	return new Promise(async (resolve) => {
+		(await this.store.getReadStream(file._id, file)).pipe(out).on('finish', () => resolve());
+	});
 };
 
 const WebdavUploads = new FileUploadClass({

apps/meteor/server/lib/dataExport/sendFile.ts

@@ -64,9 +64,11 @@ export const sendFile = async (data: ExportFile, user: IUser): Promise<void> =>
 
 	await exportMessages();
 
+	const promises: Promise<void>[] = [];
 	for await (const attachmentData of fullFileList) {
-		await copyFileUpload(attachmentData, assetsPath);
+		promises.push(copyFileUpload(attachmentData, assetsPath));
 	}
+	await Promise.all(promises);
 
 	const exportFile = `${baseDir}-export.zip`;
 	await makeZipFile(exportPath, exportFile);