There is a JS client implementation for OAuth here:
https://developers.google.com/identity/protocols/OAuth2UserAgent
It contains example code to get you running. Basically, what you do is this:
var url = "...";
var accessor = {
token: "...",
tokenSecret: "...",
consumerKey : "...",
consumerSecret: "..."
};
var message = {
action: url,
method: "GET",
parameters: {...}
};
OAuth.completeRequest(message, accessor);
OAuth.SignatureMethod.sign(message, accessor);
url = url + '?' + OAuth.formEncode(message.parameters);
// send request to 'url'
...
Cheers,
Matthias
