Killerpixler Killerpixler - 12 days ago 5
Java Question

Stored Credential from google api to be reused java

I have successfully authorized my desktop application. It stores a file called

StoredCredential
. In order to not have to keep doing the copy URL into browser, accept, etc., steps every time I run the app, I want to use the credentials that I already have stored.

My code so far:

GoogleAuthorizationCodeFlow flow = new GoogleAuthorizationCodeFlow.Builder(
httpTransport,
JSON_FACTORY,
CLIENT_ID,
CLIENT_SECRET,
SCOPE)
.setDataStoreFactory(dataStoreFactory)
.setApprovalPrompt("auto").setAccessType("offline").build();
//
System.out.println("flow success");

String url = flow
.newAuthorizationUrl()
.setRedirectUri(REDIRECT_URI)
.build();

System.out.println("Please open the following URL in your browser then "
+ "type the authorization code:");

System.out.println(" " + url);

BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

String code = br.readLine();

GoogleTokenResponse tokenResponse
= flow.newTokenRequest(code).setRedirectUri(REDIRECT_URI).execute();

GoogleCredential credential = new GoogleCredential
.Builder()
.setTransport(new NetHttpTransport())
.setJsonFactory(new JacksonFactory())
.setClientSecrets(CLIENT_ID, CLIENT_SECRET)
.addRefreshListener(new CredentialRefreshListener() {
@Override
public void onTokenResponse(
Credential credential,
TokenResponse tokenResponse) throws IOException {

System.out.println("Token Refreshed Succesfully");
}

@Override
public void onTokenErrorResponse(
Credential credential,
TokenErrorResponse tokenErrorResponse) throws IOException {

System.out.println("ERROR WITH TOKEN WTF?");
}})
.build();


How do I read the stored credential and bypass the command line prompt?

I was thinking something like:

if (stored cred exists) {
try {
// use
} catch {
// prompt the user
}
}

Answer

You can create GoogleCredential object from stored credentials like this:

HttpTransport httpTransport = new NetHttpTransport();
        JsonFactory jsonFactory = new JacksonFactory();
        GoogleCredential credential = new GoogleCredential.Builder()
                .setTransport(httpTransport)
                .setJsonFactory(jsonFactory)
                .setClientSecrets("client_id", "client_secret").build();
        credential.setAccessToken("access_token");
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