google api php client - Fatal error: Uncaught exception 'Google_Auth_Exception' with message 'Error refreshing the OAuth2 token, message: '{ "error" : "invalid_grant" } -


i have prediction app that's based on google-api-php client version 1.0.0 latest. it's working in localhost environment. when deploy same exact app hosting server environment it's gave me following issue.

this error got hosting environment

fatal error: uncaught exception 'google_auth_exception' message 'error refreshing oauth2 token, message: '{ "error" : "invalid_grant" }'' in /home/predict/public_html/predict/google/auth/oauth2.php:335 stack trace: #0 /home/predict/public_html/predict/google/auth/oauth2.php(294): google_auth_oauth2->refreshtokenrequest(array) #1 /home/predict/public_html/predict/index.php(40): google_auth_oauth2->refreshtokenwithassertion(object(google_auth_assertioncredentials)) #2 {main} thrown in /home/predict/public_html/predict/google/auth/oauth2.php on line 335

*curl , json extensions working under hosting environment.

this whole source code

<?php session_start();  set_include_path("google" . path_separator . get_include_path()); require_once 'client.php'; require_once 'service/prediction.php';  $client_id              = 'xxxxxxxxxx-uin70k09g5g6f05vqvdj9ch541c4spns.apps.googleusercontent.com';     $service_account_name   = 'xxxxxxxxxx-uin70k09g5g6f05vqvdj9ch541c4spns@developer.gserviceaccount.com';   $key_file_location      = 'appkey-d333c55a111a.p12';  if ($client_id == 'xxxxxxxxxx-uin70k09g5g6f05vqvdj9ch541c4spns.googleusercontent.com'     || !strlen($service_account_name)     || !strlen($key_file_location)) {   }  $client = new google_client();  $client->setapplicationname("predition app"); $service = new google_service_prediction($client);  if (isset($_session['service_token'])) {   $client->setaccesstoken($_session['service_token']); }  $key = file_get_contents($key_file_location); $cred = new google_auth_assertioncredentials(     $service_account_name,`enter code here`     array('https://www.googleapis.com/auth/prediction'),     $key );  $client->setassertioncredentials($cred);  if($client->getauth()->isaccesstokenexpired()) {       $client->getauth()->refreshtokenwithassertion($cred);  }  $_session['service_token'] = $client->getaccesstoken();  // prediction logic: $id             = 'datamodel'; $project        = "xxxxxxxxxx";  $input          = $_request['input'];  //$predictiondata = new google_inputinput();  //depricated method in google_api_php_client_version1.0.0      // w.p.roshan $predictiondata = new google_service_prediction_inputinput(); $predictiondata->setcsvinstance(array($input));  //$input = new google_input();                //depricated method in google_api_php_client_version1.0.0 // w.p.roshan $input = new google_service_prediction_input(); $input->setinput($predictiondata);  $predictionresult = $service->trainedmodels->predict($project,$id, $input,$optparams = array()); //print '<h3>prediction result:</h3><pre>' . print_r($result, true) . '</pre>';  $accuracymetaresult = $service->trainedmodels->get($project, $id, $optparams = array());     //print '<h3>classification accuracy result:</h3><pre>' . print_r($result, true) . '</pre>';  $stdout                     = new stdclass(); $stdout->datamodel          = $predictionresult['id']; $stdout->outputlabel        = $predictionresult['outputlabel']; $stdout->negative           = $predictionresult['modeldata']['outputmulti'][0]['score']; $stdout->neutral            = $predictionresult['modeldata']['outputmulti'][1]['score']; $stdout->positive           = $predictionresult['modeldata']['outputmulti'][2]['score']; $stdout->modelcreated       = $accuracymetaresult['created']; $stdout->trainingcompleted  = $accuracymetaresult['trainingcomplete']; $stdout->trainingstatus     = $accuracymetaresult['trainingstatus']; $stdout->modeltype          = $accuracymetaresult['modeldata']['modelinfo']['modeltype']; $stdout->datamodelaccuracy  = $accuracymetaresult['modeldata']['modelinfo']['classificationaccuracy'];  echo json_encode($stdout);  if ($client->getaccesstoken()) {   $_session['token'] = $client->getaccesstoken(); }

i ave had hours of trying solve problem. turned out server's time couple of minutes ahead of google's time.

setting server time correct time fixed issue immediately.

hopefully helps :)


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