call Google auth API using Apache HttpClient - apache

Question

I would like to know if it is possible to call a Google API that requires auth such as the Google Calendar API using the Apache HttpClient, and no Google code or libraries. (and need the code to do it)
This is the code I have so far, its gets an auth error,
What do you use for the user/password?
HttpPost request = new HttpPost("https://www.googleapis.com/calendar/v3/users/me/calendarList/primary?key=mykey");
DefaultHttpClient client = new DefaultHttpClient();
client.getCredentialsProvider().setCredentials(
new AuthScope(AuthScope.ANY),
new UsernamePasswordCredentials(user, password));
HttpResponse response = client.execute(request);
Error:
"errors": [
{
"domain": "global",
"reason": "required",
"message": "Login Required",
"locationType": "header",
"location": "Authorization"
}
],
"code": 401,
"message": "Login Required"

Answer 1

You don't use Login and password you need to be authenticated once you are you will have an access token then you can call something like this.
https://www.googleapis.com/calendar/v3/users/me/calendarList/primary?access_token={tokenFromAuth}
You can authenticate to Google with any language that is capable of a HTTP POST and a HTTP GET. Here is my walk though of the Auth flow to Google http://www.daimto.com/google-3-legged-oauth2-flow/ you will need to create a Oauth2 credentials on Google Developer console to start. Then its just a matter of asking the user for permission to access their data and requesting the access.