Hi Stuart,

Indeed, in order to create a chat, you need to be able to push messages
from the server to the browser.
There are several techniques in order to do that.
One is the long polling technique (or Reverse Ajax). It requires a lot of
The other is going through a Flash server.

In both cases, it is quite time consuming to implement correctly those,
especially for all browsers.
I would advice you to use existing libraries or services in order to
implement your chat.

Here are 2 solutions:

You can try Xaja (http://www.thecodingmachine.com/ext/xaja). This is an
open-source Reverse Ajax framework.

Or you can use Apideo (http://www.apideo.com). This is service including a
Javascript library that can be used to send events across browsers. The
service is free for non commercial use.

Disclaimer: I've been involved in both project, so this is not a definitive
list. There might be other projects allowing you to do so.


On Tue, 21 Apr 2009 11:57:08 +0100, Stuart <stut...@gmail.com> wrote:
> 2009/4/20 Nitsan Bin-Nun <nit...@binnun.co.il>:
>> Hi Guys,
>> I have created few chats in the past, but I'm trying to create a new one
>> which saves on HTTP requests and do not become an overkill to the server
>> as
>> more users get in.
>> The chat is a one on one, I'm trying to achieve this:
>> * A user sends a message
>> * The message is not saved/save temporarily on the server
>> * The message is showed to the other user
>> Any ideas how i should implement this?
>> I have no idea how to build it in the most efficiency way, any notes or
>> recommendations or
>> anything that I should pay attention to during development will be very
>> appreciated.
> Not sure what you mean by "chats" but is it anything like this...
>     http://pnotes.org/
> If so then I'm happy to talk about how I implemented it. Unfortunately
> I can't release the code because it was developed for a client, but
> it's pretty simple in concept.
> -Stuart
> -- 
> http://stut.net/

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