programming

Reading binary data using jQuery Ajax

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jQuery is an excellent tool to make web development easy and straightforward. It helps while doing DOM manipulation and makes Ajax requests painless across different browsers and platforms. But if you want make an Ajax request, which is giving binary data as a response, you will discover that it does not work for jQuery, at least for now. Changing “dataType” parameter to “text”, does not help, neither changing it to any other jQuery supported Ajax data type.

Problem here is that jQuery still does not support HTML5 XMLHttpRequest Level 2 binary data type requests – there is even a bug in jQuery bug tracker, which asks for this feature. Although there is a long discussion about this subject on the GitHub, it seems that this feature will not become part of jQuery soon.

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Creating basic JavaScript encryption between Frontend and Backend.

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One big problem with JavaScript is that it is very hard for a developer to hide JavaScript code and to create secure data transfer between browser and server. It is always possible for someone to check XHR transfers and this makes data transfer very unsecure.

I had to deal this problem, because I had to develop sweepstakes application , which gave prizes to the user live. To make this happen I had to make secure session exchange between browser and server to synchronize FrontEnd and BackEnd.

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Watch out for hidden SPAM on your WordPress site!

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Recently I had a case where my client reported me about suspicious links on his corporate website which was built using WordPress. Immediately I was thinking that site got hacked and I was preparing myself for gruesome backup tasks.

Luckily this attack was easy, although very clever. It just changed header file and included another file which was masqueraded as part of WordPress and it was placed into wp-includes directory. File name was class-ajax.php, which is very similar to another files in this directory.

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