WebLog

I found this header option repeating in many guidelines for securing the web application. By adding these headers to response, it restricts browser to load your page into an iFrame tag. ...read more

Before CSS3 coming out, if you needed to change the layout programatically when window size is changed you would have to write a small JavaScript or JQuery to handle window resize event and perform some action on the DOM to addapt your layout. In case you would use JQuery (which is most of the cases as I do not remember last time I wrotw plain JavaScript code) you would have to hook to window resize event and handle every resize. Based on your condition you would apply some CSS to specific element or strip style from it. ...read more

Social networks are in an expansion and more and more they are becoming part of the applications, especially online applications. Even .NET framework included authentication with social networks built in as an out of the box feature of .NET platform. However as social networks evolve they are changing mostly in the area of security and user data privacy. ...read more

String hardcoding it the worst way to generate your HTML. It makes code non-maintainable and hard to read. Lately in June I wrote an article how to generate HTML string without hard coding the string and using concatenation or string format...read more

I was always wondering where are additional properties for the image stored. Simply, when you click right click on the image in Windows and go to properties, in tab Details there are some more info than just file size and image dimensions. ...read more

Recently I'we been working with HTML canvas by using cropper jQuery plugin http://fengyuanchen.github.io/cropper. It was working fine until I had to load images from Facebook. As soon as I loaded image from facebook, script was crashing with a security error: ...read more

Although Lazy keyword and functionality was introduced in .net framework 4.0, not many people are using. It is not something that was not possible to be done later, but now it is available only oin one line. Basicaly what Lazy keyword enables is to create an instance only when it is invoked for the first time. ...read more

A lot of, especially desktop applications implement plugin approach in order to make application more expendable and allow other vendors to include their specific functionality related to applications with plugins. Usually plugins are available from some sort of repository from which user can select and download them directly to application...read more

Recently I was adding GitHub project section to my blog when I run into the following exception "The server committed a protocol violation. Section=ResponseStatusLine" After some time of Google-ing I found few solutions, but the most simplest one was actually the best one...read more

ASP.NET comes with built in login form both for WebForms or MVC, but sometimes you have to do it in a custom manner where permanent authentication cookie needs to be set from your code following your business logic. First thing you have to do is to set expiration time for authentication cookie in web.config. This is for done first to make sure that your cookie does not expire during your testing. ...read more

Recently I started a small project for image optimization which relies on public image optimization services available online. For now it supports Yahoo SmushIt and Compressor.io services, but it will be extended over the time. Project is open-source and hosted at GitHub https://github.com/dejanstojanovic/ImageOptimization. ...read more

Most popular social networks such is Facebook and Google+ are providing authentication for web applications with fancy javascript pop-ups. However this approach might not work in all browsers and most likely not on every device. For example this approach does not work on iPhone or iPad because browser itself does not allow pop-ups...read more

You can find a bunch of articles on internet about HONEYPOT implementation on web pages, but in short it is a replacement for CAPTCHA anti-bot security. In CAPTCHA scenario, user needs to enter hardly recognizable characters in order to prove that he is not a bot trying to submit data...read more

Data from form are sent to backend (whether code behing of page in WebForms or Controller Action in MVC) in Request.Form property. It is oragnized as collection of name and value and can be easily access by name. In some extreme cases, you need to make some modifications to posted form data. ...read more

Using reflection you can easily access any property, filed, methods, pretty much anything of any type in .NET. Reflection is never the most elegant way to do something, but sometime you just have to do it. In older versions of C#, to declare a simple property in a class you would have to declare a private field which will be exposed by the property outside the class ...read more