mobile - Google API OAuth 2.0 Titanium: Required parameter is missing: response_type -

i trying access_token google in titanium application access google+ api. have registered android oauth2.0 client in google api console have client id , couple of redirect uris generated google: ["urn:ietf:wg:oauth:2.0:oob","http://localhost"]. trying follow authorization code flow, have made authorization request endpoint "https://accounts.google.com/o/oauth2/v2/auth" following parameters query strings:

client_id = encodeuri(<app id>) redirect_uri = encodeuri("urn:ietf:wg:oauth:2.0:oob") response_type = "code", state = <random generated number> scope = "https://www.googleapis.com/auth/plus.me" 

then create webview , redirect authorization endpoint appendend query strings. google login screen opens , can login , grant access application. in return url authorization code embedded can extract use next call.

to access_token make post request "https://accounts.google.com/o/oauth2/v2/auth" endpoint. function:

function getaccesstoken(code) {  ti.api.warn("authorization code: " + code);  var auth_data = {     code : code,     client_id : client_id,     redirect_uri : redirect_uri,     grant_type : "authorization_code", };   var client = ti.network.createhttpclient({      onload: function() {         var response_data = json.parse(this.responsetext);         var access_token = response_data["access_token"];         var expires_in = response_data["expires_in"];     },       onerror: function() {         ti.api.error("httpclient: error occurred.");         ti.api.error(this.responsetext);     }  });  var body = "";  (var key in auth_data) {     if (body.length) {         body += "&";     }     body += key + "=";     body += encodeuricomponent(auth_data[key]); }  client.open("post", "https://accounts.google.com/o/oauth2/v2/auth"); client.setrequestheader('content-type', 'application/x-www-form-urlencoded'); client.send(body);   } 

but got status code of 400 following message: "required parameter missing: response_type".

i not sure why getting this, since oauth 2.0 specification required parameters access token request grant_type, code, client_id , redirect_uri. have tried add response_type = "token" should implicit flow if understand correctly.

any advice?

it seems found problem, endpoint token exchange not correct. should "https://accounts.google.com/o/oauth2/token", @ least 1 worked me.

i point out in latest documentation of google endpoint token exchange one: "https://accounts.google.com/o/oauth2/v2/token" reason doesn't work me (the response says url not supported server). hope can people similar issue.