Tag: web

ban ’em all

Posted on by mario

Ban all the attackers. Easier said than done. A website is constantly under attack as the whole server. One day I decided it was too difficult to maintain every single server and ban those attackers. Blocking IPs on the website level is too late. Also, it consumes a lot of resources. So I went for iptables. You can find it on github/JBlond/ban_em_all

DROP vs REJECT. Well, DROP is a bad option for debugging. Also, it is not the default behavior of the OS itself. Nothing is listing on a port? The OS sends a reject. Sadly I haven’t found a way to use REJECT when it comes to IPs. Using DROP on the other hand the automatic server/website scanners assume a firewall and it is more likely to continue the scan.

jQuery bind after ajax load

Posted on by mario

Sometimes it is needed to add a jQuery event listener to an element that isn’t present in the DOM at the creation of the page but created during runtime or the result of an ajax call.

What doesn’t work is

jQuery(document).ready(function () {
    jQuery('.selector').on({
        click: function  (event){
            event.preventDefault();
            console.log('I work only with existing elements');
        }
    });
});

However, there is a way to achieve that.

jQuery(document).ready(function () {
    jQuery(document).on('click', '.selector', function (event){
        event.preventDefault();
        console.log('I work with a dynamically created elements');
    });
});

JavaScript loop / foreach an object

Posted on by mario

Coming from PHP I wondered how do to a simple foreach() in JavaScript.

function loopObject($object) {
    for (const [$key, $value] of Object.entries($object)) {
        // dome something
    }
}

Not that once I found the entries function. Why I use the dollar sign $ for the variables? It is a habit and easier to read and it avoids conflicts with language reserved words.

HTML5 Tags in IE7, IE8

Posted on by mario

To get HTML5 Tags working in Internet Explorer 7 (IE7) and Internet Explorer 8 (IE8), there is a simple workaround. Before the html head  close tag add

<!--[if lt IE 9]>
        <script>
        document.createElement('header');
        document.createElement('nav');
        document.createElement('section');
        document.createElement('article');
        document.createElement('aside');
        document.createElement('footer');
        document.createElement('hgroup');
        </script>
        <![endif]-->
    </head>

and in your css in the very first line(s)

header, nav, section, article, aside, footer, hgroup {
    display: block;
}

 

Than most html5 stuff shall work. Yes, things like input types still don’t work. That’s for sure, but at least the design won’t be broken, if you are using html5.

Posts Tagged web

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