How to retrieve the GUID for Yahoo's Contacts API

I'm attemping to use the Yahoo Contacts API to add an "invite your friends" feature on a site I'm building.

I've开发者_Python百科 found the correct web service to call (http://social.yahooapis.com/v1/user/{guid}/contacts) but it is asking for the user's GUID, not their username/password.

I've searched, and am unable to find a "lookup" feature through the Yahoo API which lets me get the user's guid from their username/password.

Does anyone have any experience with the Contacts API.

I've reaad over the documentation, and looked at YQL as well, but I still haven't found how to get the user's guid.

Thanks guys.

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This is from their developer documentation:

To get the GUID of the user who is running the application, call the GET operation on the following URI. This user must be signed in to Yahoo!

URI:
      http://social.yahooapis.com/v1/me/guid

http://developer.yahoo.com/social/rest_api_guide/introspective-guid-resource.html

Note that you can't login the user silently -- you need to display the Yahoo login page with a pop-up window and get an OAuth token (more info about this found in the dev docs).

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You can use simply:

http://social.yahooapis.com/v1/user/me/contacts

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First you need to signup your application to YDN. than you will get a consumer key and consumer secret to implement oAuth.When you get your application authorized by user.then yahoo passes you a access token and GUID by which you can call yahoo's social api.

check this out