Question

I push [script]dosomething()[/script] tags into the iframe for my comet server using chunked data, but script tags just continues to accumulate forever. How do I wipe it after every script tag?

Answer 1

Wipe script tag

P.S: When you want to wipe script tags it is probably to follow Does comet server data in the iframe just accumulate?

I believe you should close the connection after sometime(no good, see Does comet server data in the iframe just accumulate? instead) which automatically frees up the memory associated with that request. You then off course need to reconnect. This page says something else even:

“Page Streaming” means the browser
discovers server changes almost
immediately. This opens up the
possibility of real-time updates in
the browser, and allows for
bi-directional information flow.
However, it’s quite a departure from
standard HTTP usage, which leads to
several problems. First, there are
unfortunate memory implications,
because the Javascript keep
accumulating, and the browser must
retain all of that in its page model.
In a rich application with lots of
updates, that model is going to grow
quickly, and at some point a page
refresh will be necessary in order to
avoid hard drive swapping, or a worse
fate.

This advices to reload the page which is also an option. But I think closing that connection(iframe) and reconnecting might also work.

Comet has a lot of problems you need to hack around:

• As you can read from this WIKI page it also has problems with “reliable error handling method, and the impossibility of tracking the state of the request calling process.”.
• Also Internet Explorer needs to sent some junk to get the process started(see http://cometdaily.com/2007/11/05/the-forever-frame-technique/)

That’s why I again recommend you to use socket.io(see below) which takes care of all this nonsense.

Socket.io

I advice you to use socket.io instead, which is very good product. It is supported by all major browsers. As you can see it support a lot of transport(XHR, Websockets, etc) and choices the best one available on your browser for the best performance.