The service is currently unavailable Google api - php

Question

I'm using google slide API to connect to my project account, the connection worked perfectly, but sometime I get this error :
Fatal error: Uncaught Google_Service_Exception: { "error": { "code": 503, "message": "The service is currently unavailable.", "errors": [ { "message": "The service is currently unavailable.", "domain": "global", "reason": "backendError" } ], "status": "UNAVAILABLE" } } in /vendor/google/apiclient/src/Google/Http/REST.php:118 Stack trace: #0 /vendor/google/apiclient/src/Google/Http/REST.php(94): Google_Http_REST::decodeHttpResponse(Object(GuzzleHttp\Psr7\Response), Object(GuzzleHttp\Psr7\Request), 'Google_Service_...') #1 /vendor/google/apiclient/src/Google/Task/Runner.php(181): Google_Http_REST::doExecute(Object(GuzzleHttp\Client), Object(GuzzleHttp\Psr7\Request), 'Google_Service_...') #2 /vendor/google/apiclient/src/Google/Http/REST.php(58): Google_Task_Runner->run in /vendor/google/apiclient/src/Google/Http/REST.php on line 118
This is my getClient function Google API:
function getClient(string $SCOPES,string $CLIENT_SECRET_PATH,string $CREDENTIALS_PATH,string $APPLICATION_NAME) {
$this->client->setApplicationName($APPLICATION_NAME);
$this->client->setScopes($SCOPES);
$this->client->setAuthConfig($CLIENT_SECRET_PATH);
$this->client->setAccessType('offline');
$this->client->setApprovalPrompt('force');
$credentialsPath = $this->expandHomeDirectory($CREDENTIALS_PATH);
if (file_exists($credentialsPath)) {
$accessToken = json_decode(file_get_contents($credentialsPath), true);
} else {
$authUrl = $this->client->createAuthUrl();
printf("Open the following link in your browser:\n%s\n", $authUrl);
print 'Enter verification code: ';
$authCode = trim(fgets(STDIN));
$accessToken = $this->client->fetchAccessTokenWithAuthCode($authCode);
if(!file_exists(dirname($credentialsPath))) {
mkdir(dirname($credentialsPath), 0700, true);
}
file_put_contents($credentialsPath, json_encode($accessToken));
printf("Credentials saved to %s\n", $credentialsPath);
}
$this->client->setAccessToken($accessToken);
if ($this->client->isAccessTokenExpired()) {
$this->client->fetchAccessTokenWithRefreshToken($this->client->getRefreshToken());
file_put_contents($credentialsPath, json_encode($this->client->getAccessToken()));
}
return $this->client;
}
This is the request the I send:
public function replaceAllShapesWithImage(array $data_images)
{
$requests =array();
if(isset($data_images)){
foreach ($data_images as $key => $value) {
$requests[] = new \Google_Service_Slides_Request(array(
'replaceAllShapesWithImage' => array(
'imageUrl' => $value['url'],
'replaceMethod' => $value['replaceMethod'],
'containsText' => array(
'text' => $value['text']
)
)
));
}
}
return $requests;
}
$data_image has this value:
'replaceAllShapesWithImage' => array(
0 => array(
'text'=>'{{LOGO}}',
'url'=>'http://www.16cafe.com/wp-content/themes/16cafe/css/images/logo.png',
'replaceMethod'=>'CENTER_INSIDE'
),
1 => array(
'text'=>'{{PHOTO}}',
'url'=>'http://localhost:9880/wp-content/uploads/2017/02/pla23.jpg',
'replaceMethod'=>'CENTER_INSIDE'
),
)

Answer 1

Every time I catch an API error my script waits 1 second. If the error occurs again the script waits 2 seconds. Then 4 seconds, 8 seconds, 16 seconds. In total I make 5 attempts. It works every time.
public function get_analytics_response()
{
$api_call_num_of_attempts = 5;
$api_call_attempts = 0;
$api_call_sleep = 1;
do {
try {
$response = $this->analytics->reports->batchGet();
}
catch (Google_Service_Exception $e) {
// Sleep 1s, 2s, 4s, 8s, 16s + random milliseconds
$sleep = ($api_call_sleep * 1000000) + rand(1000, 1000000);
usleep($sleep);
$api_call_attempts++;
$api_call_sleep = $api_call_sleep * 2;
$error_message_json = $e->getMessage();
$error_message = json_decode($error_message_json, true);
// Save errors...
continue;
}
break;
}
while ($api_call_attempts < $api_call_num_of_attempts);
return $response;
}

Answer 2

Slides can definitely give better error messaging, but I'm pretty sure the problem is that http://localhost:9880/wp-content/uploads/2017/02/pla23.jpg image URL you are trying to insert. I tried making a replaceAllShapesWithImage request with that image and also got a 503.
Slides downloads your images over the public internet, so a localhost domain wont work. Try hosting it on some publicly accessible URL, or you can use Google Drive to host the image.

Answer 3

I had the same error message (for a totally different reason).
For me, I waited 30 seconds and attempted the same thing again, and it worked.
Seems it may simply be a brief outage of the Google API.