Javascript Archives - Codes And Notes

Published on 31 March 2020

WebSocket-based Notification System using Spring

By Diego , In Angular, Code, Java, Javascript, Spring

In this post I’ll examine how to implement a simple WebSocket-based notification system built on top of Spring. We’ll use the Stomp protocol over SockJS to communicate with either a JQuery-based client or an Angular application.

Published on 11 June 2019

Elliptic Curve Cryptography with OpenPGP.js

By Diego , In Code, Javascript

PGP encryption is not only about RSA keys. Elliptic Curve Cryptography (ECC) offers another twist on the subject, requiring smaller key sizes to provide an equivalent level of security.

Published on 29 March 2019

OpenPGP Integration (Java and JavaScript): PGP exchange between Java and JavaScript

By Diego , In Code, Java, Javascript

At last! It was about time! Allow me to bring a conclusion to our experiments in encryption. Let’s use what we previously learned about working with PGP on Java and JavaScript and make the two exchange PGP messages.

Published on 10 November 2018

OpenPGP Integration (Java and JavaScript): OpenPGP.js

By Diego , In Code, Java, Javascript

So far in this series of posts we have examined how to handle PGP encryption’s core tasks in Java. We now move to the front end side and examine the incredible power of OpenPGP.js !

Published on 06 July 2017

Writing and testing custom Angular validators: the “passwords matching” case

By codesandnotes_ , In Angular, Code, Javascript

You always end up coming to it. It’s inevitable. It cannot be helped. Yep, it’s time to write a custom validator for your shiny new Angular application. So how do you do that in Angular 4? And more importantly: how do you test it?

Published on 06 September 2016

Jasmine test on AngularJS promise-returning function keeps on timing out

By codesandnotes_ , In Code, gotcha!, Javascript

Being the test-driven developer that you are, you are writing a Jasmine test for your AngularJS factory function, which returns a promise generated by our beloved $q. You know how to test an asynchronous response with Jasmine. You confidently run the test and… bam, you get an error message “Timeout – Async callback was not invoked within timeout specified by jasmine.DEFAULT_TIMEOUT_INTERVAL”

Published on 30 March 2016

403 Forbidden on web clients against cookie-based secured REST services

By codesandnotes_ , In Code, gotcha!, Java, Javascript

You are developing your web client (AngularJS or any other) against your REST services’ server, secured using cookies-based sessions and CSRF tokens sent as cookies. You’ve done everything by the book, followed the tutorials to make your security work, especially CORS and CSRF tokens. And yet you still get a pesky 403 when trying to login!

Published on 04 September 2015

AngularJS web apps for Spring-based REST services security: the client side

By codesandnotes_ , In Code, Javascript

After a summer break we return to our secure web client / REST-based solution: in this post we examine how our AngularJS-based web client should behave in order to comply with the security measures we’ve enforced on the server side.

Published on 12 July 2015

AngularJS web apps for Spring-based REST services security: the server side part 1

By codesandnotes_ , In Code, Java, Javascript, Spring

A full, secure implementation of a solution for web-client, REST-based systems using AngularJS and Spring and addressing authentication, CORS and CSRF aspects. The full, working code is available on GitHub. In this part, we setup the project and examine how CORS is configured on the server side.

Published on 31 March 2015

AngularJS conditional “require” validation

By codesandnotes_ , In Code, Javascript

It’s might not be a well-know feature, but AngularJS allows you to use the ng-required argument on input and textarea fields. And that can be quite handy!

Category: Javascript