Harish Karumuthil harish2704

Nodejs developer

harish2704 / reflection-middleware.js

Created August 7, 2017 07:09

Simple Nodejs-Express reflection API

	module.exports = function( app ){
	app.post('/__reflection', function( req, res, next ){
	const ip = req.headers[ 'x-forwarded-for' ] \|\| req.connection.remoteAddress;
	console.log( 'IP', ip );
	if( ip !== '::ffff:127.0.0.1' ){
	return next();
	}
	let fn;
	try {
	eval( 'fn = ' + req.body.code );

harish2704 / repl-log-promise.js

Created July 19, 2017 15:19

Log promise in Node js repl. This will add a command ".log" which can be used like ".log Promise.resolve(123)" Raw


	function logSuccess( a, b, c ){ console.log('Success'); global.uu = arguments; global.aa = a; global.bb = b; global.cc = c; }
	function logError( e ){ console.log( 'Error'); global.ee = e; }
	function log( promise ){ promise.then(logSuccess).catch(logError); }
	function doLog( task ){ var cmd =`log(${task})`; this.outputStream.write(cmd); this.context.vm.runInThisContext(cmd); this.displayPrompt();}
	repl.repl.defineCommand('log', doLog);

harish2704 / sequelize-forEach-batch.js

Created July 7, 2017 21:09

Do any task using all the items in a Sequlize model. Just write the task alone. ItemMaper will take care about batch execution and limit

	class ItemMaper{
	constructor( { model, batchSize, limit }, sequelizeOpts ){
	this.model = model;
	this.batchSize = batchSize \|\| 10;
	this.limit = limit \|\| Infinity;
	this.sequelizeOpts = sequelizeOpts \|\| {};
	}

	async forEachBatch( fn ){
	let offset = -this.batchSize,

harish2704 / DataBuffer.js

Created July 7, 2017 20:59

An in-memory data buffer class for Sequelize models. Can be used for buffering findOrCreate / create / upsert queries

	/* ഓം ബ്രഹ്മാർപ്പണം. */

	/*
	* DataBuffer.js
	* Created: Fri Jul 07 2017 23:14:58 GMT+0530 (IST)
	* Copyright 2017 Harish.K<[email protected]>
	*/

	/**
	* DataBuffer

harish2704 / sendmail.js

Last active May 14, 2022 10:55

Psudo sendmail script for testing

	#!/usr/bin/env node
	const fs = require('fs');
	const path = require('path');
	const mailDir = path.join( __dirname, '..', '..', 'test-mails' );

	const {stdin} = process;

	async function getStdin() {
	let result = '';

harish2704 / catch-if.js

Created June 22, 2017 06:52

catchIf syntax sugar for ES6 Promise. can be applied to any Promise library

	/*
	Adds a catchIf method to Promise.
	Usage

	Promise.reject( new TypeError() )
	.catchIf( TypeError, function handler(err){ console.log('TypeError handled')} )
	.catchIf( RangeError, function handler(err){ console.log('RangeError handled')} )
	*/
	function addCatchIf ( promiseClass ){
	promiseClass.prototype.catchIf = function(){

harish2704 / multiline-to-js.js

Last active June 20, 2017 06:08

multiline-to-js.js

	const getStdin = require('get-stdin');
	/* Usage */
	/*
	>> cat file.html \| node multiline-to-js.js
	*/

	/* Input */
	/*
	<div class="tab-pane active" >
	<div class="card-box">

harish2704 / example.my.cnf

Last active February 16, 2024 07:26

local mysql server for testing

harish2704 / generate-certificate-openssl.sh

Created June 16, 2017 09:40

Generate Root CA and self-singed certificate using openssl

	#!/usr/bin/env bash

	DomainName="yourdomain.example.com";

	echo "Generating Root CA key"
	[[ -f rootCA.key ]] \|\| openssl genrsa -des3 -out rootCA.key 2048


	echo "Generating Root CA certificate"
	[[ -f rootCA.pem ]] \|\| openssl req -x509 -new -nodes -key rootCA.key -sha256 -days 1024 -out rootCA.pem

harish2704 / grub.cfg

Created May 1, 2017 05:41

Boot ubuntu iso file

	set menu_color_normal=white/black
	set menu_color_highlight=black/light-gray

	# File name of ISO file
	set ubu_path=/ubuntu-16.04-desktop-amd64.iso



	menuentry "Try Ubuntu without installing Failsafe" {
	# Search for iso file in all paritions and set the partition as root