MIX08- Accessing Windows Live Services via AtomPub

Friday, March 7, 2008

Atom Syndication Format

IETF RFC 4287
XML format
Organized in feeds, entries and links
Extensible data and metadata

Atom Publising Protocol

IETF RFC 5023
Protocol for publishing and editing resources
Represents over HTTP
Simple RESTful interaction model

Demo Photos:

https://cumulus.services.live.com/{id}/AtomSpacesPhotos

-Authorization via LiveID http://dev.live.com/liveid

-Browse and create folders and photos

Folders/Photos as Atom feeds and entries
Photos are Atom "media link entries"

<feed>

data

data

<content type> like jpg with src url.

Edit link in atom. Links to just an entry.

<LP:Properties> ID Version of content within content.

PUT POST via Http is accessible.

Some of the control mechanisms:

Service metadata /$metadata
Presentation control $orderby, $filter, $top, $skip, $expand
Access primary value url/$value

Post at feed level.

scalar pull in item

set pull in set

Over any HTTP stack within AtomPub libraries Using ADO.NET (Astoria) Data services Framework.

Windows live is trying very hard to be like flickr,Amazon S3,Google Docs and etc...

Note:

foreach(Folder f in svc.Folders)

WebClient c = new WebClient();

c.headers["Authorization"] = "DelegatedToken dt=\"" + DelegationToken

using(Stream s= c.OpenRead(string.Format(Svc, CID) + "/Folders"))

var feed = SyndicationFeed.Load(XMLReader)

foreach (SyndicationItem item in feed.Items);

{

Dropdownlist1.Items.Add(item.Title.Text);

}