Values returned by XmlHttpRequest

When it comes to returning data from an XmlHttpRequest, there are several options to consider. Here's a breakdown:

  • Plain HTML: The request can format the data and return it in a user-friendly way.
    Advantage: Easy for the calling page to consume.
    Disadvantage: Limited flexibility due to fixed layout.

  • XML: The request can return XML which can be formatted using XSLT on the calling page.
    Advantage: Can easily be consumed by other sources.
    Disadvantage: Dependence on browser support for XSLT.

  • JSON: The request can return JSON which can be consumed and rendered in HTML using Javascript.
    Advantage: Easier to organize javascript code.
    Disadvantage: May not be as straightforward as the other options.

I have also considered combining option one with abstracting the view logic in the called service to allow for easy switching of layouts. Personally, I believe this is the most compatible option.

Another idea that crossed my mind is whether it would be beneficial to accommodate all three response formats based on a parameter added to the request. What do you think?

javascriptajax

Answer №1

If you're in search of a quick fix that is compatible with most frameworks out there, my recommendation would be to opt for JSON. It's simple to get started with and gets the job done.

However, if you're embarking on a project that is expected to grow significantly (either in size or through the development of your own API for third-party extensions), I would suggest going with XML. While it is possible to create a proxy to deliver information in JSON or HTML as well, having XML as the primary source definitely pays off in terms of time and effort invested in building the application.

As @John Topley rightly pointed out: it all depends on the specific requirements of your project.

Answer №2

I concur with the viewpoint expressed by John Topley - the choice between formats really hinges on the specific application being developed. For further insights into the pros and cons of each format, I recommend checking out a comprehensive article on quirksmode that delves into this topic: http://www.quirksmode.org/blog/archives/2005/12/the_ajax_respon.html

Answer №3

The extent of "ajaxyness" in your application will dictate the best approach to take. For a front end resembling a "rich client" like Gmail, opting for the JSON solution is advisable, considering the need to handle client-side view generation. On the other hand, if you are using ajax sparingly for simple user messages and occasional field updates, sticking with option 1 may be more suitable since a significant amount of view logic already resides on the server.

Answer №4

Attempting to utilize XmlHttpRequest can be quite a headache, unless you enjoy that kind of challenge - essentially reinventing the wheel. However, some individuals find joy in recreating existing solutions just for the satisfaction of accomplishing it. Personally, I prefer to avoid such endeavors...

My recommendation would be to opt for a framework like prototype or Extjs, which come equipped with numerous data loading functions tailored for XML and JSON. This not only ensures more predictable outcomes but also offers support for different browsers, along with event handlers to manage successful or failed XmlHttpRequests.

Answer №5

Creating a unique response format shouldn't pose much of a challenge. JSON is my preferred choice as I enjoy utilizing OO in js, and parsing XML isn't exactly my strong suit :)

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