Is there a specific purpose for identifying ajax requests by adding a GET parameter (such as 'ajax=1') instead of solely relying on checking the 'X-Requested-With' header on the server side?
This method may be practical if there is uncertainty about whether the client's JS framework passes the header, but are there any benefits if we are certain it does? Are there specific scenarios where this approach could be advantageous?
Essentially, there is no distinguishable difference between an AJAX request and a traditional page refresh initiated by a browser to the server.
If you're curious, you could use a tool such as Fiddler to observe that both types of requests appear very similar.
To accurately identify an AJAX request, the most dependable method is to explicitly include a specific value in the request. This value can be included in the URL, a custom HTTP header, or within the request body for POST requests.
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