michiel

#
# Wide-open CORS config for nginx
#
location / {

     if ($request_method = 'OPTIONS') {

        add_header 'Access-Control-Allow-Origin' '*';
        
        #

realmyst

function declOfNum(number, titles) {  
    cases = [2, 0, 1, 1, 1, 2];  
    return titles[ (number%100>4 && number%100<20)? 2 : cases[(number%10<5)?number%10:5] ];  
}

use:
declOfNum(count, ['найдена', 'найдено', 'найдены']);

githiro

if (!Array.prototype.forEach)
{
	Array.prototype.forEach = function(fn, scope)
	{
		for(var i = 0, len = this.length; i < len; ++i)
		{
			fn.call(scope, this[i], i, this);
		}
	}
}

soheilhy

Virtual Hosts on nginx (CSC309)

When hosting our web applications, we often have one public IP address (i.e., an IP address visible to the outside world) using which we want to host multiple web apps. For example, one may wants to host three different web apps respectively for example1.com, example2.com, and example1.com/images on the same machine using a single IP address.

How can we do that? Well, the good news is Internet browsers

hufyhang

/*
 * forEach Polyfill
 *
 * 2015-12-27
 *
 * By Feifei Hang, http://feifeihang.info
 * Public Domain.
 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
 */
'use strict';

pirate

function getUrlParams(search) {
    const hashes = search.slice(search.indexOf('?') + 1).split('&')
    const params = {}
    hashes.map(hash => {
        const [key, val] = hash.split('=')
        params[key] = decodeURIComponent(val)
    })
    return params
}

saulshanabrook

This is a working example on how to store CryptoKeys locally in your browser. We are able to save the objects, without serializing them. This means we can keep them not exportable (which might be more secure?? not sure what attack vectors this prevents).

To try out this example, first make sure you are in a browser that has support for async...await and indexedDB (latest chrome canary with chrome://flags "Enable Experimental Javascript" works). Load some page and copy and paste this code into the console. Then call encryptDataSaveKey(). This will create a private/public key pair and encrypted some random data with the private key. Then save both of them. Now reload the page, copy in the code, and run loadKeyDecryptData(). It will load the keys and encrypted data and decrypt it. You should see the same data logged both times.

zmts

Про токены, JSON Web Tokens (JWT), аутентификацию и авторизацию. Token-Based Authentication

Last major update: 25.08.2020

• Что такое авторизация/аутентификация
• Где хранить токены
• Как ставить куки ?
• Процесс логина
• Процесс рефреш токенов
• Кража токенов/Механизм контроля токенов

jaredpalmer

import React from 'react';
import axios from 'axios';

// This is a Higher Order Component that abstracts duplicated data fetching
// on the server and client.
export default function SSR(Page) {
  class SSR extends React.Component {
    static getInitialData(ctx) {
      // Need to call the wrapped components getInitialData if it exists
      return Page.getInitialData

YozhEzhi

Рассмотрим перебор массива с коллбэком:
const BEATLES = ['john', 'paul', 'george', 'ringo'];

// Обычный цикл for:
for (let i = 0; i < BEATLES.length; ++i) {
  console.log(BEATLES[i]);
}

// Метод Array.forEach:
BEATLES.forEach(beatle => console.log(beatle));