batch_request.md

Batch Request Example

This example covers sending a batch request with the Facebook SDK for PHP.

Example

The following example assumes we have the following permissions granted from the user: user_likes, user_events, user_photos, publish_actions. The example makes use of JSONPath to reference specific batch operations.

$fb = new Facebook\Facebook([
  'app_id' => '{app-id}',
  'app_secret' => '{app-secret}',
  'default_graph_version' => 'v2.10',
  ]);

// Since all the requests will be sent on behalf of the same user,
// we'll set the default fallback access token here.
$fb->setDefaultAccessToken('user-access-token');

/**
 * Generate some requests and then send them in a batch request.
 */

// Get the name of the logged in user
$requestUserName = $fb->request('GET', '/me?fields=id,name');

// Get user likes
$requestUserLikes = $fb->request('GET', '/me/likes?fields=id,name&limit=1');

// Get user events
$requestUserEvents = $fb->request('GET', '/me/events?fields=id,name&limit=2');

// Post a status update with reference to the user's name
$message = 'My name is {result=user-profile:$.name}.' . "\n\n";
$message .= 'I like this page: {result=user-likes:$.data.0.name}.' . "\n\n";
$message .= 'My next 2 events are {result=user-events:$.data.*.name}.';
$statusUpdate = ['message' => $message];
$requestPostToFeed = $fb->request('POST', '/me/feed', $statusUpdate);

// Get user photos
$requestUserPhotos = $fb->request('GET', '/me/photos?fields=id,source,name&limit=2');

$batch = [
    'user-profile' => $requestUserName,
    'user-likes' => $requestUserLikes,
    'user-events' => $requestUserEvents,
    'post-to-feed' => $requestPostToFeed,
    'user-photos' => $requestUserPhotos,
    ];

echo '<h1>Make a batch request</h1>' . "\n\n";

try {
  $responses = $fb->sendBatchRequest($batch);
} catch(Facebook\Exception\ResponseException $e) {
  // When Graph returns an error
  echo 'Graph returned an error: ' . $e->getMessage();
  exit;
} catch(Facebook\Exception\SDKException $e) {
  // When validation fails or other local issues
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
  exit;
}

foreach ($responses as $key => $response) {
  if ($response->isError()) {
    $e = $response->getThrownException();
    echo '<p>Error! Facebook SDK Said: ' . $e->getMessage() . "\n\n";
    echo '<p>Graph Said: ' . "\n\n";
    var_dump($e->getResponse());
  } else {
    echo "<p>(" . $key . ") HTTP status code: " . $response->getHttpStatusCode() . "<br />\n";
    echo "Response: " . $response->getBody() . "</p>\n\n";
    echo "<hr />\n\n";
  }
}

There five requests being made in this batch requests.

• Get the user's full name and id.
• Get one thing the user likes (which is a Page node).
• Get two events the user has been invited to (which are Event nodes).
• Compose a message using the data obtained from the 3 requests above and post it on the user's timeline.
• Get two photos from the user.

If the request was successful, the user should have a new status update similar to this:

My name is Foo User.

I like this page: Facebook Developers.

My next 2 events are House Warming Party,Some Foo Event.

It should also contain a response containing two photos from the user.

Warning: The response object should return a null response for any request that was pointed to with JSONPath as is the behaviour of the batch functionality of the Graph API.

Multiple User Example

Since the requests sent in a batch are unrelated by default, we can make requests on behalf of multiple users and pages in the same batch request.

$fb = new Facebook\Facebook([
  'app_id' => '{app-id}',
  'app_secret' => '{app-secret}',
  'default_graph_version' => 'v2.10',
  ]);

$batch = [
    $fb->request('GET', '/me?fields=id,name', 'user-access-token-one'),
    $fb->request('GET', '/me?fields=id,name', 'user-access-token-two'),
    $fb->request('GET', '/me?fields=id,name', 'page-access-token-one'),
    $fb->request('GET', '/me?fields=id,name', 'page-access-token-two'),
    ];

try {
  $responses = $fb->sendBatchRequest($batch);
} catch(Facebook\Exception\ResponseException $e) {
  // When Graph returns an error
  echo 'Graph returned an error: ' . $e->getMessage();
  exit;
} catch(Facebook\Exception\SDKException $e) {
  // When validation fails or other local issues
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
  exit;
}

foreach ($responses as $key => $response) {
  if ($response->isError()) {
    $e = $response->getThrownException();
    echo '<p>Error! Facebook SDK Said: ' . $e->getMessage() . "\n\n";
    echo '<p>Graph Said: ' . "\n\n";
    var_dump($e->getResponse());
  } else {
    echo "<p>(" . $key . ") HTTP status code: " . $response->getHttpStatusCode() . "<br />\n";
    echo "Response: " . $response->getBody() . "</p>\n\n";
    echo "<hr />\n\n";
  }
}