Currently embarking on my journey to develop an AJAX application with server side push. My choice of tools includes Grizzly Comet on Glassfish V2. While exploring sample applications, I've noticed that most utilize IFrames for content updates on the client side. However, I am determined to stick solely to JavaScript. Do you happen to know of any sample applications that align with this preference, ideally those without dependency on a JavaScript library?
One key aspect of the push is that the HTTP request remains open indefinitely, which not all client implementations are equipped to handle correctly. While it may be possible to achieve this using pure javascript in Firefox due to its extensive API, the XMLHTTPRequest object would likely timeout and fail to stream the content.
IFrames can be a reliable option, and you may also consider utilizing the object tag for improved standard compliance.
Before XMLHTTPRequest and Ajax were established terminologies, accessing server data through IFrames was a common practice.
My approach to enabling push functionality using only JavaScript and PHP was quite an interesting journey.
Firstly, I utilized JavaScript to make an initial call and load the content into a specific div element. Subsequently, I configured the JavaScript code to communicate with the PHP script, which would then go into a sleep mode until it detects a new update. Once the update is recognized, the PHP script distributes the data to all relevant parties before going back to sleep.
By implementing this system, it effectively allows for long polling while preventing frequent consecutive calls. Personally, I set a time delay of between 5 to 30 minutes on the PHP side to manage this process efficiently.
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