afraz-khan

import { Middleware, ExpressMiddlewareInterface } from 'routing-controllers';
import express from 'express';

/**
 * Regular expression pattern for whitelisting request paths.
 * Each pattern represents an allowed HTTP method and path.
 */
const whiteListedPathsPattern = new RegExp(
  [
    `^GET /api/user$`,

afraz-khan

import crypto from 'crypto';

export class JwtTokenVerifier {
  verifyToken(token: string) {
    const [headerEncoded, payloadEncoded, signature] = token.split('.');
    const header = this.decodeBase64ToAscii(headerEncoded);
    const payload = this.decodeBase64ToAscii(payloadEncoded);
    
    // Other validation checks here
    

afraz-khan

const ONE_DAY_INTERVAL = 24 * 60 * 60;

/**
 * This method restricts any given moment in time(seconds) to pre midnight like "23:59" or "11:59pm".
 */
export trimTo24HourLimit(
    timestamp: number // in seconds
  ) {
    if (timestamp >= ONE_DAY_INTERVAL || timestamp <= -ONE_DAY_INTERVAL) {
      timestamp %= ONE_DAY_INTERVAL;

afraz-khan

1. On the source server(remote/local), export the backup first:

pg_dump -U {username} -h {host} -p {port} -f {output-file-path}.sql {dbname to backup}

copy the backup file to the target server.

2. On the target server(remote/local), log into the postgres using below command.

afraz-khan

1. Open a terminal and login to your database using below command (LINUX)

$ psql -h [HOST-STRING] -d [DATABASE-NAME] -U [USERNAME]

2. Now use below command to export data from your database to CSV file

$ \copy (Table/Query) to [path-to-csvfile] csv header

Examples:

afraz-khan

// E.164 Notation for Phone Numbers
const phonePattern = /^\+[0-9]{7,14}$/;

const phoneNumber = '+2312323231321';

if (!phonePattern.test(phoneNumber)) {
		const message =
      "Phone number must start with '+' symbol, must have numerical digits only, " +
      'min 7 digits and max 15 digits allowed';
    

afraz-khan

import jwkToPem from 'jwk-to-pem';
import jwt, {JwtPayload, VerifyCallback, VerifyOptions} from 'jsonwebtoken';
import {AppConfig} from '../AppConfig';
import JsonWebTokenException from '../../exception/JsonWebTokenException';

export class CognitoJWTVerifier {

  /*
    This is application config object having all cognito params.
  */

afraz-khan

import * as jwt from 'jsonwebtoken';

export class PastJWTGenerator {
  protected jwtSecret: string = 'jwt-secret';
  protected expiresIn: number = 60 * 60 * 3; // three hours

  // secondsInPast: number of seconds to move back in the past from where token must be issued.
  generate(claims: any, secondsInPast: number, secondsToExpireIn?: number) {
    const data = {
      ...claims,

afraz-khan

import {scryptSync, randomBytes, createCipheriv, createDecipheriv} from 'crypto';

export class Encrypter {
  private algorithm: string = 'aes-192-cbc';

  // encryption key for the cipher
  private key: string;

  constructor(key: string) {
    this.key = key;

afraz-khan

Log into your RDS Instance

• Open a terminal into your local machine.
• Get hold of credentials of any existing database in your RDS instance.
• Log into the instance with those DB credentials using below command:

    psql \
     --host=<DB instance endpoint> \
     --port=<port> \
     --username=<master username> \
  

--password \