Reputation: 9319
We want to let our GAE for java app to read docs from google drive for the app specific requirements.
For the same I was trying to refer https://developers.google.com/drive/auth/web-server
However, I am unable to understand the code flow. There is no mention like from where to obtain the authorizationCode as mentioned in the code below:
public static Credential getCredentials(String authorizationCode, String state)
throws CodeExchangeException, NoRefreshTokenException, IOException {
String emailAddress = "";
try {
Credential credentials = exchangeCode(authorizationCode);
Userinfo userInfo = getUserInfo(credentials);
String userId = userInfo.getId();
emailAddress = userInfo.getEmail();
if (credentials.getRefreshToken() != null) {
storeCredentials(userId, credentials);
return credentials;
} else {
credentials = getStoredCredentials(userId);
if (credentials != null && credentials.getRefreshToken() != null) {
return credentials;
}
}
} catch (CodeExchangeException e) {
Any working example of integration between gae for java and google drive?
Upvotes: 2
Views: 590
Reputation: 5623
if you try to have offline access, first of all you must get authorization code which may be redeemed for an access token and a refresh token.
1) Enable Google Drive Services from Google APIs console
2) Create Client ID for web applications
then , get authorization code, for instance:
https://accounts.google.com/o/oauth2/auth?access_type=offline
&approval_prompt=auto
&client_id=[your id]
&redirect_uri=[url]
&response_type=code
&scope=[access scopes]
&state=/profile
after that, you can call exchangeCode() , and its parameter will be your authorization code that was retrieved before.
Upvotes: 1