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POJava Google Plus Access via oAuth 2.0
 

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  1. POJava Google Plus Access via oAuth 2.0
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    <p>I tried many different things to access a google Account in order to read out profile-data, but it failed every time.</p> <pre><code> Exception in thread "main" com.google.api.client.googleapis.json.GoogleJsonResponseException: 401 Unauthorized { "code" : 401, "errors" : [ { "domain" : "global", "location" : "Authorization", "locationType" : "header", "message" : "Invalid Credentials", "reason" : "authError" } ], "message" : "Invalid Credentials" } </code></pre> <p>I tried to access via following code</p> <pre><code>@SuppressWarnings("deprecation") public static GoogleAccessProtectedResource connect(String CLIENT_ID,String CLIENT_SECRET,String SCOPE,String CALLBACK_URL,HttpTransport TRANSPORT,JsonFactory JSON_FACTORY) throws IOException{ // Generate the URL to which we will direct users String authorizeUrl = new GoogleAuthorizationRequestUrl(CLIENT_ID, CALLBACK_URL, SCOPE).build(); System.out.println("Paste this url in your browser: " + authorizeUrl); // Wait for the authorization code System.out.println("Type the code you received here: "); BufferedReader in = new BufferedReader(new InputStreamReader(System.in)); String authorizationCode = in.readLine(); // Exchange for an access and refresh token GoogleAuthorizationCodeGrant authRequest = new GoogleAuthorizationCodeGrant(TRANSPORT, JSON_FACTORY, CLIENT_ID, CLIENT_SECRET, authorizationCode, CALLBACK_URL); authRequest.useBasicAuthorization = false; AccessTokenResponse authResponse = authRequest.execute(); String accessToken = authResponse.accessToken; GoogleAccessProtectedResource access = new GoogleAccessProtectedResource(accessToken, TRANSPORT, JSON_FACTORY, CLIENT_ID, CLIENT_SECRET, authResponse.refreshToken); HttpRequestFactory rf = TRANSPORT.createRequestFactory(access); System.out.println("Access token: " + authResponse.accessToken); // Make an authenticated request GenericUrl shortenEndpoint = new GenericUrl("https://www.googleapis.com/urlshortener/v1/url"); String requestBody = "{\"longUrl\":\"http://farm6.static.flickr.com/5281/5686001474_e06f1587ff_o.jpg\"}"; HttpRequest request = rf.buildPostRequest(shortenEndpoint, ByteArrayContent.fromString("application/json", requestBody)); HttpResponse shortUrl = request.execute(); BufferedReader output = new BufferedReader(new InputStreamReader(shortUrl.getContent())); System.out.println("Shorten Response: "); for (String line = output.readLine(); line != null; line = output.readLine()) { System.out.println(line); } // Refresh a token (SHOULD ONLY BE DONE WHEN ACCESS TOKEN EXPIRES) //access.refreshToken(); //System.out.println("Original Token: " + accessToken + " New Token: " + access.getAccessToken()); return access; } </code></pre> <p>Then i want to access my account</p> <pre><code>public static void getData1(String accessToken, String clientId, String clientSecret, String refreshToken) throws IOException{ // Set up the HTTP transport and JSON factory HttpTransport httpTransport = new NetHttpTransport(); JsonFactory jsonFactory = new JacksonFactory(); // Set up OAuth 2.0 access of protected resources // using the refresh and access tokens, automatically // refreshing the access token when it expires GoogleAccessProtectedResource requestInitializer = new GoogleAccessProtectedResource(accessToken, httpTransport, jsonFactory, clientId, clientSecret, refreshToken); // Set up the main Google+ class Plus plus = Plus.builder(httpTransport, jsonFactory) .setHttpRequestInitializer(requestInitializer) .build(); // Make a request to access your profile and display it to console Person profile = plus.people().get("[myID]").execute(); System.out.println("ID: " + profile.getId()); System.out.println("Name: " + profile.getDisplayName()); System.out.println("Image URL: " + profile.getImage().getUrl()); System.out.println("Profile URL: " + profile.getUrl()); } </code></pre> <p>Following main method should work afterwards: <code>CLIENT_ID</code> and <code>CLIENT_SECRET</code> are created</p> <pre><code>public static void main(String[] args) throws IOException { GoogleAccessProtectedResource access1=Connection.connect(CLIENT_ID, CLIENT_SECRET, SCOPE, CALLBACK_URL, TRANSPORT, JSON_FACTORY); //refresh String token= access1.getAccessToken(); access1.refreshToken(); String refreshed=access1.getAccessToken(); //get data Connection.getData1(token, CLIENT_ID, CLIENT_SECRET, refreshed); } </code></pre> <p>This is my Data...</p> <pre><code>private static final String SCOPE = "https://www.googleapis.com/auth/urlshortener"; private static final String CALLBACK_URL = "urn:ietf:wg:oauth:2.0:oob"; private static final HttpTransport TRANSPORT = new NetHttpTransport(); private static final JsonFactory JSON_FACTORY = new JacksonFactory(); // FILL THESE IN WITH YOUR VALUES FROM THE API CONSOLE private static final String CLIENT_ID = "[myID].apps.googleusercontent.com"; private static final String CLIENT_SECRET = "[myID]"; </code></pre> <hr> <p>Now there is a bad Request Exception thrown</p> <pre><code>Exception in thread "main" com.google.api.client.http.HttpResponseException: 400 Bad Request { "error" : "invalid_client" } at com.google.api.client.http.HttpRequest.execute(HttpRequest.java:900) at com.google.api.client.auth.oauth2.draft10.AccessTokenRequest.executeUnparsed(AccessTokenRequest.java:472) at com.google.api.client.auth.oauth2.draft10.AccessTokenRequest.execute(AccessTokenRequest.java:486) at Connection.connect(Connection.java:78) at Connection.main(Connection.java:50) </code></pre>
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    1. PO
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    1. PTQuestion
    1. USBill the Lizard
    1. UShannes
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    1. PO
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    1. COis ur code working?
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      1. POJava Google Plus Access via oAuth 2.0
      1. USRahul Singh
    2. COits working now! i cannot explain what went wrong, i copy pasted the clientid and secret again and it worked. But its much better and easier if you use the google plus java starter project: https://code.google.com/p/google-plus-java-starter/
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      1. POJava Google Plus Access via oAuth 2.0
      1. UShannes
 

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