Comment by k3n | Hacker News Reader

Comment by k3n | Hacker News Reader

I was wondering when some of these types of libs might make their way into the world, I know I saw in Nicholas Zakas' book "High Performance JavaScript"[1] that he demonstrated how to read back (process) a large AJAX result in chunks, allowing you to begin working with the response before it was finished downloading. It was called "multipart XHR", and he shows a neat code example and then links to a site that has sample code[2].

The main difference between multipart XHR and Oboe, that I can see, is that MHXR requires you to format your data in a specific manner (using a magic delimiting character), though I'm curious if the base method is similar or not.

1. http://shop.oreilly.com/product/9780596802806.do

2. http://techfoolery.com/mxhr/

I haven't looked at MXHR but here's roughly what Oboe does:

1 Create XHR, listen to XHR2 progress event. 2 Use Clarinet.js SAX parser, scoop up all events. 3 From SAX events, build up actual JSON and maintain path from root to actual node. 4 Match that path (+ some other stuff) against registered JSONPath specs. 5 Fire callbacks if they pass.

Interesting. After looking at the MXHR more, it appears as though it was adapted from Digg.com[1] (aka DUI.Stream[2]), and then later adapted by Facebook[3].

Yours sounds more elegant in that it can handle JSON naturally, but I wonder if the other might be better suited for binary content (not sure in which context that would make sense, if any).

Either way, I find them all fascinating, and I've starred your project :) Will keep an eye on it.

1. http://techfoolery.com/mxhr/mxhr.js

2. https://github.com/digg/stream

3. https://www.facebook.com/note.php?note_id=183263890703

I suppose you could make a binary equivalent if you needed to. You'd need to make some kind of binary matching language, maybe like Erlang's binary matching.

Adding XML/XPATH support would be a natural extension.

Awesome, I've been waiting for a library exactly like this :)

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