Is there anything in the header of an HTTP request that would allow me to differentiate between an AJAX call and a direct browser request from a given client? Are the user agent strings usually the same regardless?
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Is there anything in the header of an HTTP request that would allow me to differentiate between an AJAX call and a direct browser request from a given client? Are the user agent strings usually the same regardless?
If you use Prototype, jQuery, Mootools or YUI you should find a X-Requested-With:XMLHttpRequest header which will do the trick for you. It should be possible to insert whatever header you like with other libraries.
At the lowest level, given a XMLHttpRequest or XMLHTTP object, you can set this header with the setRequestHeader method as follows: