Error 500 when using Google_PredictionService Google API sample - php

Question

Updated:
My project is to be able to provide a web based application which allows the visitor to upload/download/delete files using GoogleDrive. The project requires it to be server based, which does not require credentials from the user to be able to perform these functions.
In a nutshell, the web application stores the files on a single dedicated google drive account, instead of storing the files on the server.
I researched Google's developer site, and was directed to using the example below as a starting point, to configure the PHP application to use the Drive Account I set up.
I followed the instructions per Google's page:
https://code.google.com/p/google-api-php-client/wiki/OAuth2#Service_Accounts
When I execute this script, I am receiving the following 500 error:
PHP Catchable fatal error: Argument 3 passed to
Google_HostedmodelsServiceResource::predict() must be an instance of
Google_Input, none given, called in
/data/sites/scott/htdocs/dfs_development/drive/serviceAccount.php on
line 62 and defined in
/data/sites/scott/htdocs/dfs_development/apis/google-api-php-client/src/contrib/Google_PredictionService.php
on line 36
What am I doing wrong here? I am uncertain what $project variable should hold, and it seems the predict() function needs 3 args, however I am at a loss to know what it should be.
Here is my code, which I obtained from the URL above. Thank you in advance for your response.
require_once '../apis/google-api-php-client/src/Google_Client.php';
require_once '../apis/google-api-php-client/src/contrib/Google_PredictionService.php';
// Set your client id, service account name, and the path to your private key.
// For more information about obtaining these keys, visit:
// https://developers.google.com/console/help/#service_accounts
const CLIENT_ID = '##########.apps.googleusercontent.com';
const SERVICE_ACCOUNT_NAME = '#########developer.gserviceaccount.com';
// Make sure you keep your key.p12 file in a secure location, and isn't
// readable by others.
const KEY_FILE = 'pathto/secretlystored/######-privatekey.p12';
$client = new Google_Client();
$client->setApplicationName("My Google Drive");
// Set your cached access token. Remember to replace $_SESSION with a
// real database or memcached.
session_start();
if (isset($_SESSION['token'])) {
$client->setAccessToken($_SESSION['token']);
}
// Load the key in PKCS 12 format (you need to download this from the
// Google API Console when the service account was created.
$key = file_get_contents(KEY_FILE);
$client->setAssertionCredentials(new Google_AssertionCredentials(
SERVICE_ACCOUNT_NAME,
array('https://www.googleapis.com/auth/prediction'),
$key)
);
$client->setClientId(CLIENT_ID);
$service = new Google_PredictionService($client);
// Prediction logic:
$id = 'dfslocalhost';
$predictionData = new Google_InputInput();
$predictionData->setCsvInstance(array('Je suis fatigue'));
$input = new Google_Input();
$input->setInput($predictionData);
$result = $service->hostedmodels->predict($id, $input); ## 500 ERROR occurs here..
print '<h2>Prediction Result:</h2><pre>' . print_r($result, true) . '</pre>';
// We're not done yet. Remember to update the cached access token.
// Remember to replace $_SESSION with a real database or memcached.
if ($client->getAccessToken()) {
$_SESSION['token'] = $client->getAccessToken();
}

Answer 1

thats because Google_PredictionService API has not actived in your google API console dev.