From 809d4180185a12d9eff48562e81caea864b4f5b3 Mon Sep 17 00:00:00 2001
From: CGsama <CGsama@outlook.com>
Date: Sun, 16 Jul 2023 01:41:57 -0400
Subject: [PATCH] use gunzip-maybe tar-stream to replace exec

---
 packages/backend/package.json                 |  2 +
 .../backend/src/misc/process-masto-notes.ts   | 87 ++++++++++++++-----
 2 files changed, 67 insertions(+), 22 deletions(-)

diff --git a/packages/backend/package.json b/packages/backend/package.json
index fe8c078a0..6e9f82edd 100644
--- a/packages/backend/package.json
+++ b/packages/backend/package.json
@@ -65,6 +65,7 @@
 		"file-type": "17.1.6",
 		"fluent-ffmpeg": "2.1.2",
 		"got": "12.5.3",
+		"gunzip-maybe": "^1.4.2",
 		"hpagent": "0.1.2",
 		"ioredis": "5.3.2",
 		"ip-cidr": "3.1.0",
@@ -125,6 +126,7 @@
 		"summaly": "2.7.0",
 		"syslog-pro": "1.0.0",
 		"systeminformation": "5.17.17",
+		"tar-stream": "^3.1.6",
 		"tesseract.js": "^3.0.3",
 		"tinycolor2": "1.5.2",
 		"tmp": "0.2.1",
diff --git a/packages/backend/src/misc/process-masto-notes.ts b/packages/backend/src/misc/process-masto-notes.ts
index 1310748d2..2fe7c7a58 100644
--- a/packages/backend/src/misc/process-masto-notes.ts
+++ b/packages/backend/src/misc/process-masto-notes.ts
@@ -3,10 +3,11 @@ import Logger from "@/services/logger.js";
 import { createTemp, createTempDir } from "./create-temp.js";
 import { downloadUrl } from "./download-url.js";
 import { addFile } from "@/services/drive/add-file.js";
-import { exec } from "node:child_process";
 import { Users } from "@/models/index.js";
+import * as tar from 'tar-stream';
+import gunzip from "gunzip-maybe";
 
-const logger = new Logger("download-text-file");
+const logger = new Logger("process-masto-notes");
 
 export async function processMastoNotes(
 	url: string,
@@ -32,27 +33,69 @@ export async function processMastoNotes(
 function processMastoFile(fn: string, dir: string, uid: string) {
 	return new Promise(async (resolve, reject) => {
 		const user = await Users.findOneBy({ id: uid });
-		exec(
-			`tar -xf ${fn} -C ${dir}`,
-			async (error: any, stdout: string, stderr: string) => {
-				if (error) {
-					reject(error);
-				}
-				const outbox = JSON.parse(fs.readFileSync(`${dir}/outbox.json`));
-				for (const note of outbox.orderedItems) {
-					for (const attachment of note.object.attachment) {
-						const url = attachment.url.replace("..", "");
-						try {
-							const fpath = `${dir}${url}`;
-							const driveFile = await addFile({ user: user, path: fpath });
-							attachment.driveFile = driveFile;
-						} catch (e) {
-							logger.error(`Skipped adding file to drive: ${url}`);
-						}
+		try{
+			logger.info(`Start unzip ${fn}`);
+			await unzipTarGz(fn, dir);
+			logger.info(`Unzip to ${dir}`);
+			const outbox = JSON.parse(fs.readFileSync(`${dir}/outbox.json`));
+			for (const note of outbox.orderedItems) {
+				for (const attachment of note.object.attachment) {
+					const url = attachment.url.replace("..", "");
+					try {
+						const fpath = `${dir}${url}`;
+						const driveFile = await addFile({ user: user, path: fpath });
+						attachment.driveFile = driveFile;
+					} catch (e) {
+						logger.error(`Skipped adding file to drive: ${url}`);
 					}
 				}
-				resolve(outbox);
-			},
-		);
+			}
+			resolve(outbox);
+		}catch(e){
+			logger.error(`Error on extract masto note package: ${fn}`);
+			reject(e);
+		}
 	});
 }
+
+function createFileDir(fn: string){
+	if(!fs.existsSync(fn)){
+		fs.mkdirSync(fn, {recursive: true});
+		fs.rmdirSync(fn);
+	}
+}
+
+function unzipTarGz(fn: string, dir: string){
+	return new Promise(async (resolve, reject) => {
+		const onErr = (err: any) => {
+			logger.error(`pipe broken: ${err}`);
+			reject();
+		}
+		try{
+			const extract = tar.extract().on('error', onErr);
+			dir = dir.endsWith("/") ? dir : dir + "/";
+			const ls: string[] = [];
+			extract.on('entry', function (header: any, stream: any, next: any) {
+				try{
+					ls.push(dir + header.name);
+					createFileDir(dir + header.name);
+					stream.on('error', onErr).pipe(fs.createWriteStream(dir + header.name)).on('error', onErr);
+					next();
+				}catch(e){
+					logger.error(`create dir error:${e}`);
+					reject();
+				}
+			});
+
+			extract.on('finish', function () {
+			  resolve(ls);
+			});
+			
+			fs.createReadStream(fn).on('error', onErr).pipe(gunzip()).on('error', onErr).pipe(extract).on('error', onErr);
+			
+		}catch(e){
+			logger.error(`unzipTarGz error: ${e}`);
+			reject();
+		}
+	});
+}
\ No newline at end of file