The Cappuccino Blog - Latest Comments in XMLHTTPRequest, JSONP & Cappuccino

Re: XMLHTTPRequest, JSONP & Cappuccino

@joely — Sat, 24 Apr 2010 15:47:37 -0000

This is a great article. I keep coming back to it. Thanks!

Re: XMLHTTPRequest, JSONP & Cappuccino

boucher — Fri, 04 Dec 2009 18:13:46 -0000

Ok got that one too.

Re: XMLHTTPRequest, JSONP & Cappuccino

meelash — Fri, 04 Dec 2009 18:02:09 -0000

No, you didn't :) There's another one right above the JSONPConnection section.

Re: XMLHTTPRequest, JSONP & Cappuccino

Ross Boucher — Thu, 05 Mar 2009 18:27:17 -0000

Thanks, corrected it.

Re: XMLHTTPRequest, JSONP & Cappuccino

Chewychompy — Thu, 05 Mar 2009 18:00:32 -0000

The Link called "API Documentation" gives 404.

The correct link is here http://cappuccino.org/learn...

Delete this comment if the document gets fixed.

Re: XMLHTTPRequest, JSONP & Cappuccino

boucher — Wed, 22 Oct 2008 00:23:47 -0000

Yes it adds script elements, and then later removes them. Its possible this leaks in IE, but its also possible that only happens if you "leak" references to event handlers. I believe we correctly clean these up.

Re: XMLHTTPRequest, JSONP & Cappuccino

Joey Guerra — Wed, 22 Oct 2008 00:21:24 -0000

Adding and removing the <script/> elements seems to leak memory in IE. Does the JSONP technique just add <script/> elements to the DOM?

Re: XMLHTTPRequest, JSONP & Cappuccino

boucher — Wed, 22 Oct 2008 00:12:10 -0000

I haven't tested it with polling, but there's no reason it shouldn't work. It was designed with the ability to make arbitrary requests at arbitrary times. There's no guarantee about what order the responses will come in, but with a five second interval they will probably come in the right order, and its also trivial to manage this yourself.

I don't have any specifics about browser memory characteristics using JSONP versus a regular xml http request, but I would image they are fairly similar.

Re: XMLHTTPRequest, JSONP & Cappuccino

Joey Guerra — Wed, 22 Oct 2008 00:07:29 -0000

Nice job. I wanted to comment about using CPJSONPConnection class for accomplishing cross domain communications. I've built a chat web app that's loaded within one domain but communicates with a subdomain. I've implemented a polling messaging technique to inform the user of any messages that they've received. Have you tested using the CPJSONPConnection class in a situation where the app has to make multiple requests (5 seconds apart)? Do you have any ideas about the browser memory usage when using the <script/> tag technique?

Re: XMLHTTPRequest, JSONP & Cappuccino

John — Fri, 17 Oct 2008 21:23:37 -0000

Aaah, didn't realize that. I'll go and check again

Re: XMLHTTPRequest, JSONP & Cappuccino

tolmasky — Thu, 09 Oct 2008 03:42:43 -0000

Absolutely. In fact we use PHP in 280 Slides.

Re: XMLHTTPRequest, JSONP & Cappuccino

John — Wed, 08 Oct 2008 09:02:07 -0000

Great writeup, I always wonder how to communicate with other services. So is it possible to get Cappuccino to work with a PHP backend?