Hi everybody !!


How Ajax works internally??

once a brower sends for a page(say xyzzzzdomainxx.com/index.php)

page is loaded on my browser.

1>if page has a iframe

  and click on the button (which is in index.php) page
   will reload some contents of index.php(say content yyy)
  sync request

2>if ajax is used ,
   async request.


Question-

1>only sync request and async request is the key point with iframe request and ajax request
or there are other difference ??


2>how the ajax internally works,

3>is it uses the same instance of the browser
is it uses same ---->>>socket ,port....request.

4>one more question--how browser memory is internally assigned.
say for example my page is loaded with 512kb data,
when ajax is used to load some data ,does another chunk of memory is again assignd.

or if i m going for ajax based application ,client system memory will be a constraint for me?


Any suggestions/points are always welcome
Awaiting for your reply.

Thanks & Regards,
Vinod

__________________
Cheers :)

vinod

It justs initiates a request, GET for example, to the server and stores the response. If the response contains other content in frames nothing will happen, all that is taken care of normally by the browser. All the XMLHttpRequest sees is some textual content, it has no knowledge of what its structure is or means.
I'm not really sure about you questions about memory. Underneath the covers on Windows XMLHttpRequest uses URLMon.dll, as does IE.

--

Joe (Microsoft MVP - XML)

Client system memory will be a constraint if you are going to be bringing in huge amounts of data with your Ajax calls, I suppose, but not any more than if you had brought that data in via a typical page request in the first place.

Woody Z
http://www.learntoprogramnow.com
How to use a forum to help solve problems

Ofcourse client memory will be a constraint if heavy page/data is loaded using ajax.
i m still not sure to figure out how it exactly works, i m looking something low level architecture rather then simply sending http ,
i.e does it uses the same port/socket from where the original request has been sent?
it might be i m not correct , i want to go into detail, if any other resources or online tutorial? , it will help me .


Cheers :)

vinod

The HTTP request object acts as a browser in itself, responsible for creating Http request and handling responses.

Mujahid Khaleel
Web designing, development, E-commerce applications.