protected void updateCustomFields(
User user, Userinfo userinfo, String accessToken, String refreshToken)
throws PortalException, SystemException {
ExpandoValueLocalServiceUtil.addValue(
user.getCompanyId(),
User.class.getName(),
ExpandoTableConstants.DEFAULT_TABLE_NAME,
GOOGLE_ACCESS_TOKEN,
user.getUserId(),
accessToken);
ExpandoValueLocalServiceUtil.addValue(
user.getCompanyId(),
User.class.getName(),
ExpandoTableConstants.DEFAULT_TABLE_NAME,
GOOGLE_REFRESH_TOKEN,
user.getUserId(),
refreshToken);
ExpandoValueLocalServiceUtil.addValue(
user.getCompanyId(),
User.class.getName(),
ExpandoTableConstants.DEFAULT_TABLE_NAME,
GOOGLE_USER_ID,
user.getUserId(),
userinfo.getId());
}
/**
* Retrieve credentials using the provided authorization code.
*
* <p>This function exchanges the authorization code for an access token and queries the UserInfo
* API to retrieve the user's e-mail address. If a refresh token has been retrieved along with an
* access token, it is stored in the application database using the user's e-mail address as key.
* If no refresh token has been retrieved, the function checks in the application database for one
* and returns it if found or throws a NoRefreshTokenException with the authorization URL to
* redirect the user to.
*
* @return Credential containing an access and refresh token.
* @throws NoRefreshTokenException No refresh token could be retrieved from the available sources.
* @throws IOException
*/
public Credential getActiveCredential() throws NoRefreshTokenException, IOException {
String userId = (String) request.getSession().getAttribute(USER_ID_KEY);
Credential credential = null;
try {
// Only bother looking for a Credential if the user has an existing
// session with their email address stored.
if (userId != null) {
credential = getStoredCredential(userId);
}
// No Credential was stored for the current user or no refresh token is
// available.
// If an authorizationCode is present, upgrade it into an
// access token and hopefully a refresh token.
if ((credential == null || credential.getRefreshToken() == null)
&& request.getParameter("code") != null) {
credential = exchangeCode(request.getParameter("code"));
if (credential != null) {
Userinfo userInfo = getUserInfo(credential);
userId = userInfo.getId();
request.getSession().setAttribute(USER_ID_KEY, userId);
request.getSession().setAttribute(EMAIL_KEY, userInfo.getEmail());
// Sometimes we won't get a refresh token after upgrading a code.
// This won't work for our app, because the user can land directly
// at our app without first visiting Google Drive. Therefore,
// only bother to store the Credential if it has a refresh token.
// If it doesn't, we'll get one below.
if (credential.getRefreshToken() != null) {
credentialStore.store(userId, credential);
}
}
}
if (credential == null || credential.getRefreshToken() == null) {
// No refresh token has been retrieved.
// Start a "fresh" OAuth 2.0 flow so that we can get a refresh token.
String email = (String) request.getSession().getAttribute(EMAIL_KEY);
String authorizationUrl = getAuthorizationUrl(email);
throw new NoRefreshTokenException(authorizationUrl);
}
} catch (CodeExchangeException e) {
// The code the user arrived here with was bad. This pretty much never
// happens. In a production application, we'd either redirect the user
// somewhere like a home page, or show them a vague error mentioning
// that they probably didn't arrive to our app from Google Drive.
e.printStackTrace();
} catch (NoUserIdException e) {
// This is bad because it means the user either denied us access
// to their email address, or we couldn't fetch it for some reason.
// This is unrecoverable. In a production application, we'd show the
// user a message saying that we need access to their email address
// to work.
e.printStackTrace();
}
return credential;
}
protected User setGoogleCredentials(HttpSession session, long companyId, Credential credential)
throws Exception {
Userinfo userinfo = getUserInfo(credential);
if (userinfo == null) {
return null;
}
User user = null;
String emailAddress = userinfo.getEmail();
if ((user == null) && Validator.isNotNull(emailAddress)) {
user = UserLocalServiceUtil.fetchUserByEmailAddress(companyId, emailAddress);
if ((user != null) && (user.getStatus() != WorkflowConstants.STATUS_INCOMPLETE)) {
session.setAttribute("GOOGLE_USER_EMAIL_ADDRESS", emailAddress);
}
}
if (user != null) {
if (user.getStatus() == WorkflowConstants.STATUS_INCOMPLETE) {
session.setAttribute("GOOGLE_INCOMPLETE_USER_ID", userinfo.getId());
user.setEmailAddress(userinfo.getEmail());
user.setFirstName(userinfo.getGivenName());
user.setLastName(userinfo.getFamilyName());
return user;
}
user = updateUser(user, userinfo);
} else {
user = addUser(session, companyId, userinfo);
}
if (DeployManagerUtil.isDeployed(_GOOGLE_DRIVE_CONTEXT)) {
updateCustomFields(user, userinfo, credential.getAccessToken(), credential.getRefreshToken());
}
return user;
}
protected Userinfo getUserInfo(Credential credentials) throws NoSuchUserIdException {
Oauth2.Builder builder =
new Oauth2.Builder(new NetHttpTransport(), new JacksonFactory(), credentials);
Oauth2 oauth2 = builder.build();
Userinfo userInfo = null;
try {
userInfo = oauth2.userinfo().get().execute();
} catch (IOException e) {
System.err.println("An error occurred: " + e);
}
if ((userInfo != null) && (userInfo.getId() != null)) {
return userInfo;
} else {
throw new NoSuchUserIdException();
}
}
