khaledosman’s gists

khaledosman / mongo-backup.sh

Last active October 15, 2018 09:00

bash script for taking daily mongo backups inside docker image

	#!/bin/bash

	export CONTAINER_NAME=""
	export DATABASE_NAME=""
	export BACKUP_LOCATION="/home/ec2-user/backups"
	export MONGO_USER=""
	export MONGO_PASSWORD=""
	export TIMESTAMP=$(date +'%Y%m%d%H%M%S')
	export DUMP_PATH=/data/${DATABASE_NAME}-backup-${TIMESTAMP}
	export ZIP_PATH=${DATABASE_NAME}-backup-${TIMESTAMP}.zip

khaledosman / getNextRecurringDate.js

Created August 1, 2018 08:44

	const getNextDate = (dateObj, recurringType) => {
	let pointerTime = dateObj.getTime()
	const generatedTimes = []
	while (pointerTime <= Date.now()) {
	let pointerDate = new Date(pointerTime)

	if (recurringType === 'daily') {
	pointerTime = pointerDate.setHours(pointerDate.getHours() + 24)
	} else if (recurringType === 'monthly') {
	pointerTime = pointerDate.setMonth(pointerDate.getMonth() + 1)

khaledosman / dynamodb-helpers.ts

Last active February 21, 2022 00:02

Simple CRUD operations for DynamoDB using NodeJS & Typescript

	import * as AWS from 'aws-sdk'
	import { DeleteItemOutput, DocumentClient, GetItemOutput, PutItemOutput, QueryOutput,
	ScanOutput, UpdateItemOutput } from 'aws-sdk/clients/dynamodb'

	AWS.config.update({ region: 'eu-central-1' })
	const { DynamoDB } = AWS
	const dynamoDB: DocumentClient = new DynamoDB.DocumentClient()

	export function query (attributeName: string, attributeValue: string): Promise<QueryOutput> {
	const params = {

khaledosman / s3-helpers.ts

Last active August 23, 2018 11:26

Wrappers around AWS S3 SDK for NodeJS & Typescript

	import { S3 } from 'aws-sdk'
	import { CreateBucketOutput, GetObjectOutput, HeadObjectOutput, ListObjectsV2Output,
	PutObjectOutput } from 'aws-sdk/clients/s3'

	const s3: S3 = new S3()
	const BUCKET_NAME: string = process.env.BUCKET_NAME

	export function appendToFile (params): Promise<PutObjectOutput> {
	const { Body, ...rest } = params
	return getFileContent(rest)

khaledosman / generate-zip-from-files.js

Last active April 17, 2023 05:26

recursively add specific files within a directory to a zipfile using NodeJS & JsZip

	const fs = require('fs')
	const path = require('path')
	const JSZip = require('jszip')
	const { promisify } = require('util')
	const readFile = promisify(fs.readFile)
	const readDir = promisify(fs.readdir)
	const lstat = promisify(fs.lstat)

	function addFilesToZip (jsZip, directoryPath, filesToInclude) {
	const promiseArr = filesToInclude.map(async file => {

khaledosman / calculate-great-circle-distance.ts

Created August 22, 2018 08:44

returns shortest distance between two geolocations

	interface Location {
	lat: number,
	long: number
	}

	// Converts from degrees to radians.
	function toRadians (degrees: number): number {
	return degrees * Math.PI / 180
	}

khaledosman / lambda-response.ts

Created August 23, 2018 11:28

aws lambda response w/ cors enabled for serverless

	export function lambdaResponse (body: any, statusCode = 200): any {
	return {
	body: JSON.stringify(body),
	headers: {
	'Access-Control-Allow-Credentials': true,
	'Access-Control-Allow-Headers': '*',
	'Access-Control-Allow-Origin': '*'
	},
	statusCode,
	isBase64Encoded: false

khaledosman / es6 modules in node.json

Last active February 11, 2019 14:15

package.json quick setup to work with es6 modules in node without using --experimental-modules and .mjs files or setting up a webpack.config

khaledosman / oath2-authorization-code.js

Created August 30, 2018 10:13

PubNub functions implementation of Google OAUTH2 w/ Authorization code flow

	// https://developers.google.com/actions/identity/oauth2?oauth=code
	const kvstore = require('kvstore')
	const base64 = require('codec/base64')

	const GOOGLE_CLIENT_ID = 'google-client-id'

	export default (request, response) => {
	let headersObject = request.headers
	let bodyString = request.body
	let paramsObject = request.params

khaledosman / convert-to-pem.sh

Created September 13, 2018 08:47

Converts *.key and *.crt files to pem format

	#Convert private key to em format
	openssl rsa -in domain.key -text > domain.pem

	#Convert .crt file to .pem format
	openssl x509 -in cert.crt -out cert.pem -outform PEM
	openssl x509 -in ca.crt -out ca.pem -outform PEM

Khaled Osman khaledosman