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Re: chat on web, Ajax ? [message #177165 is a reply to message #177157]

Fri, 24 February 2012 15:48

The Natural Philosoph
Messages: 993
Registered: September 2010

Karma:

Senior Member

sl@exabyte wrote:
> Hi folks.
>
> I thought I have gathered all pieces I need, then suddenly I realise there
> is still one problem.
>
> I am implementing chat on the web, ie on a browse. On browser, I can only
> use javascript.
You coudl poll the server using a whole page or a framethereof.

Thats all javascript does, but it does it a bit more efficiently.

So the problem is what method to use to listen for incoming
> data.
>
> Ajax ? I am just wondering; Ajax does not seem to bother about port, I mean
> the standard method is "open socket at server, port 8888...".
>
so?
> Of course, when data is sent to a php file on server, it must be port 80.
>

not always.

Yiu can specify any port you want in a url.

General form of url is

"Http:" - the protocol to use
"Mywebserverg.org" a resolvable dns location on the internet.
"/mydirectory.myfile.ext" where on the server teh file is (virtually)
located and some hints in ext as to how the file is to be processed
before being sent
"?param=value&param2=valeu2..." GET variables to be passed to the script
if any
":port number" the port to connect to at the remote end.

So you can set up a web server on any port you like and access it with a
special URL.

> Is this the only way on a browser ?
>

All methods are essentially polling and client initiated. The
differences lie in what mechanism you use to poll, and how much of the
page or frame you download.

So at the crudest end a meta refresh tag will reload the whole page, or
a frame within a page. A javsacript reload can do te same, but it can
request and even smaller block of data and rebuild part of te page with it.

Ajax is just a way of doing that with a bit less overhead IIRC.

All can be vectored to any server port you like.

> Thanks.
>
>

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[Message index]

		chat on web, Ajax ? By: SL on Fri, 24 February 2012 13:59
		Re: chat on web, Ajax ? By: SL on Fri, 24 February 2012 14:15
		Re: chat on web, Ajax ? By: Captain Paralytic on Fri, 24 February 2012 14:20
		Re: chat on web, Ajax ? By: SL on Fri, 24 February 2012 15:52
		Re: chat on web, Ajax ? By: The Natural Philosoph on Fri, 24 February 2012 15:59
		Re: chat on web, Ajax ? By: SL on Fri, 24 February 2012 16:23
		Re: chat on web, Ajax ? By: Doug Miller on Fri, 24 February 2012 16:52
		Re: chat on web, Ajax ? By: SL on Sat, 25 February 2012 02:01
		Re: chat on web, Ajax ? By: M. Strobel on Fri, 24 February 2012 15:22
		Re: chat on web, Ajax ? By: Erwin Moller on Fri, 24 February 2012 14:28
		Re: chat on web, Ajax ? By: Tim Streater on Fri, 24 February 2012 14:51
		Re: chat on web, Ajax ? By: The Natural Philosoph on Fri, 24 February 2012 15:54
		Re: chat on web, Ajax ? By: Tim Streater on Fri, 24 February 2012 19:02
		Re: chat on web, Ajax ? By: The Natural Philosoph on Fri, 24 February 2012 21:06
		Re: chat on web, Ajax ? By: Tim Streater on Fri, 24 February 2012 21:38
		Re: chat on web, Ajax ? By: The Natural Philosoph on Fri, 24 February 2012 21:51
		Re: chat on web, Ajax ? By: Tim Streater on Fri, 24 February 2012 22:26
		Re: chat on web, Ajax ? By: The Natural Philosoph on Sat, 25 February 2012 13:15
		Re: chat on web, Ajax ? By: Tim Streater on Sat, 25 February 2012 13:20
		Re: chat on web, Ajax ? By: The Natural Philosoph on Sat, 25 February 2012 13:33
		Re: chat on web, Ajax ? By: Tim Streater on Sat, 25 February 2012 13:42
		Re: chat on web, Ajax ? By: SL on Fri, 24 February 2012 16:31
		Re: chat on web, Ajax ? By: The Natural Philosoph on Fri, 24 February 2012 15:48
		Re: chat on web, Ajax ? By: Thomas 'PointedEars' on Fri, 24 February 2012 16:27
		Re: chat on web, Ajax ? By: Jeff North on Sat, 25 February 2012 13:13
		Re: chat on web, Ajax ? By: Arno Welzel on Sun, 26 February 2012 03:54

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