PHP Classes

Traffic Jam: Block unwanted bots based on access speed

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traffic-jam 0.1GNU General Publi...5HTTP, PHP 5, Security


This class can be used to block unwanted bots based on access speed.

It keeps track of the history of accesses of bots based on their IP address. The accesses information is stored in a history file named based on the IP address.

If the bot accesses more than a given number per second, it will be blocked for a given period of time.

The class can be configured with a whitelist to allow accesses of given user agents that will not be throttled.

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Sometimes sites are abused by bots that crawl them and extract their content.

Since bot scripts often send too many requests to the site servers, that may cause server overload. The site owner may also not be happy with the possibility that other sites that may be stealing their content.

This class may help fighting this kind of abuse by keeping track of the frequency of the accesses performed by bots. It can be used to block bots that are sending requests at a frequency above an acceptable limit.

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//traffic jam class 0.1 beta

$tJam = new trafficJam();

$jamCode = $tJam->jamTraffic();

if( !empty(
$jamCode) ){
        <title>Traffic Jam Example</title>
        <a href="example.php">Click Me</a>
        <p>To test, click link as a normal human would and then click as quickly as possible. Depending on your humanSpeed and jamTime settings, you should get jammed.</p>
        <p>Once jammed, you can refresh the page or visit again later to see countdown to when you will be allowed back in</p>

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