Re: [xdi] HttpXdiMessagingBinding

[Giovanni Bartolomeo <giovanni.bartolomeo@uniroma2.it>]

Hello Markus, All,

here is the basics of a possible counterproposal (for now I've it only  
in my mind):

- one XDI operation per HTTP request/response (because all requests  
are sent to the same HTTP endpoint this does not introduce the  
overhead of establishing a new TCP connection)

- use HTTP verbs with their own semantics (GET,PUT,DELETE,...)

- use HTTP status codes with their own semantics (200 OK, 201 Created,  
302 Found, 303 See Other, 307 Temporary Redirect, 400 Bad Request, 401  
Unauthorized, 403 Forbidden, 404 Not Found , 405 Method Not Allowed,  
409 Conflict, 410 Gone, ...)

- use XRI translated into HTTP URI, as addressing. XRI segments are  
concatenated to the endpoint (see my proposal "Named Graphs, Named  
Links, Named Nodes"  
https://www.oasis-open.org/committees/download.php/41948/bartolomeo-Named%20Graphs%2C%20Named%20Nodes%2C%20Named%20Links%20%28camera%20ready%29.pdf)

- use HTTP Etags and other cache controls to improve performance  
(allowing a client to issue conditional requests)

- this comes for free: take advantage of the world-wide content  
delivery infrastructure designed for HTTP

What do you think?

Giovanni


Def. Quota Markus Sabadello <markus.sabadello@xdi.org>:

> Hmm I think the idea behind not relying too deeply on specific HTTP
> features was that XDI should allow bindings to several different protocols,
> and should still always work kind of the same way.
>
> Anyway, Bill what is the process if one TC member disagrees with a proposal?
> He would have to write a counter-proposal, right? :)
>
> Markus
>
> On Tue, Jul 3, 2012 at 1:00 PM, Giovanni Bartolomeo <
> giovanni.bartolomeo@uniroma2.it> wrote:
>
> > Hello,
> >
> > Whereas I like very much the idea of an HTTP binding for XDI (thanks
> > Markus for having started this page), I have to express my concern on the
> > choice of remaining formally compliant with it without really relying on
> > its already provided semantics.
> >
> > I would be in favour of a deeper integration, especially now that
> > developers seem finally to have re-discovered (http://programmableweb.com)
> > the unifying power of REST, that, as often Bill has pointed out, is much
> > more than CRUD.
> >
> > I think we should take more advantages of functional (e.g., addressing,
> > methods, error codes, eTags, etc.) and non functional (e.g., caching)
> > capabilities already offered by the protocol, instead of duplicating this
> > functions on top of it.
> >
> > NOTE: I'm not saying that XDI should totally rely on HTTP. I'm saying
> > that, where HTTP (or another protocol) already provides these functions, it
> > would be a pity to replicate them on top of it, rather than proceed with a
> > mapping.
> >
> > Sorry to be once more not aligned with the position of the TC members :)
> >
> > Thanks,
> > Giovanni
> >
> >
> > Def. Quota Drummond Reed <drummond.reed@xdi.org>:
> >
> >
> >  Markus, good job on this. I added a sentence to the "Out of Scope" section
> > > to clarify that the questions/issues listed there are out-of-scope for
> > > this
> > > proposal but should be dealt with in other proposals.
> > >
> > > Everything else looks good to me.
> > >
> > > I encourage everyone else to review it -- unless there are any objections,
> > > we will approve this proposal on this Friday's telecon.
> > >
> > > =Drummond
> > >
> > > On Sat, Jun 30, 2012 at 4:29 AM, Markus Sabadello
> > > <markus.sabadello@xdi.org>**wrote:
> > >
> > >  I updated this page according to what we talked about during the TC call,
> > > > please review.
> > > > https://wiki.oasis-open.org/**xdi/HttpXdiMessagingBinding<https://wiki.oasis-open.org/xdi/HttpXdiMessagingBinding>
> > > >
> > > > Markus
> >
> >
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> >
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----------------------------------------------------------------
Invito da parte dell'Ateneo:
Il tuo futuro e quello della Ricerca Scientifica hanno bisogno del
tuo aiuto. Dona il  5 x mille all'Universita' di Roma Tor Vergata
codice fiscale: 80213750583 http://5x1000.uniroma2.it