feat(unzipper): initial commit

unzipper/.gitignore

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+.env*

unzipper/README.md

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+## Overview
+zip and unzip files
+
+## Preparation
+
+Run the following command in your favorite terminal to install dependenies.
+```
+npm i
+```
+
+## Development setup
+
+Run the following command in your favorite terminal if you fancy log messages for debugging.
+```
+export DEBUG=$DEBUG,zip,debug
+```
+
+Run the following command in your favorite terminal to start the service in development mode.
+```
+npm run dev
+```

unzipper/README.md.license

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+/*
+ * SPDX-FileCopyrightText: 2022 Stefan Begerad <stefan@begerad.de>
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */

unzipper/index.js

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+const debug=require('debug')('debug');
+const fs = require('fs');
+const pathInput='/home/begerad/git/sib/sandbox-node/request';
+const fileInput='connect-top-dhid-1654514173016.zip';
+debug('fileInput: '+fileInput);
+const filePathInput=pathInput+'/'+fileInput;
+debug('filePathInput: '+filePathInput);
+const fileInputNoType=fileInput.slice(0,fileInput.length-4);
+debug('fileInputNoType: '+fileInputNoType);
+const pathOutput='/tmp'+'/'+fileInputNoType;
+debug('pathOutput: '+pathOutput);
+
+//create new folder on demand
+let isUnzipped=false;
+try {
+    //check if folder already exists
+    if (!fs.existsSync(pathOutput)) {
+        fs.mkdirSync(pathOutput);
+        debug("Directory is created.");
+    } else {
+        debug("Directory already exists.");
+	isUnzipped=true;
+    }
+} catch (err) {
+    debug(err);
+}
+
+//double check if output path exists
+if (fs.existsSync(pathOutput)) {
+    debug('Directory exists!');
+} else {
+    debug('Directory not found.');
+}
+
+if(!isUnzipped){
+    debug('unzip');
+    const unzipper=require('./unzipper');
+    (async () => {
+	try {
+	    await unzipper.unzip(filePathInput,pathOutput);
+	} catch (err) {
+	    console.error(err);
+	}
+    })();
+}else{
+    debug('unzip already done');
+}
+debug('done.');

unzipper/package.json

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+{
+    "private": true,
+    "name": "unzipper",
+    "version": "0.0.1",
+    "description": "",
+    "main": "index.js",
+    "scripts": {
+        "dev": "nodemon index.js",
+        "test": "echo \"Error: no test specified\" && exit 1"
+    },
+    "author": "Stefan Begerad",
+    "license": "GPL-3.0",
+    "devDependencies": {
+        "nodemon": "^2.0.7"
+    },
+    "dependencies": {
+        "fs": "0.0.1-security",
+        "http": "0.0.1-security",
+        "request": "^2.88.2",
+        "unzipper": "^0.10.11"
+    }
+}

unzipper/unzipper.js

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+const debug=require('debug')('unzipper');
+const {Parse} = require('unzipper');
+const {createWriteStream, createReadStream} = require('fs');
+
+const unzip = (pathInput,pathOutput) => {
+    debug('pathInput: '+pathInput);
+    const stream=createReadStream(pathInput).pipe(Parse());
+    return new Promise((resolve, reject) => {
+	debug('pathOutput: '+pathOutput);
+	stream.on('entry', (entry) => {
+	    let file=`${pathOutput}/${entry.path}`;
+	    debug('file: '+file);
+	    const writeStream=createWriteStream(file);
+	    return entry.pipe(writeStream);
+	});
+	stream.on('finish', () => resolve());
+	stream.on('error', (error) => reject(error));
+    });
+};
+
+module.exports={
+    unzip
+}