How do I use Google's OAuth 2.0 Playground for Document List API?

Question

I'm having an issue playing with the Document List API on the OAuth 2.0 Playground. All the other APIs work except for this one. The request is being sent from the playground as:

GET /feeds/default/private/full/ HTTP/1.1
Host: docs.google.com
Content-length: 0
Authorization: OAuth <the oAuth string generated>

And the response is coming back as:

HTTP/1.1 400 Bad Request
status: 400
content-length: 19
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
expires: Tue, 29 May 2012 17:11:47 GMT
x-google-cache-control: remote-fetch
server: GSE
via: HTTP/1.1 GWA
cache-control: private, max-age=0
date: Tue, 29 May 2012 17:11:47 GMT
x-frame-options: SAMEORIGIN
content-type: text/html; charset=UTF-8
-content-encoding: gzip

Invalid request URI

Is the API simply deprecated because of Google Drive or is there something else I'm doing wrong?

Answer 1

You have to send requests to version 3 of the API, by either adding the ?v=3 query parameter to the URI or sending the GData-Version: 3.0 header.