Google Calendar API using PHP curl for batch

Question

Can anybody point me in the direction of examples of batch entry of events using the Google Calendar API.

The Google reference is https://developers.google.com/google-apps/calendar/batch and the example is:

POST /batch HTTP/1.1
Authorization: Bearer your_auth_token
Host: www.googleapis.com
Content-Type: multipart/mixed; boundary=batch_foobarbaz
Content-Length: total_content_length

--batch_foobarbaz
Content-Type: application/http
Content-ID: <item1:12930812@barnyard.example.com>

GET /farm/v1/animals/pony

--batch_foobarbaz
Content-Type: application/http
Content-ID: <item2:12930812@barnyard.example.com>

PUT /farm/v1/animals/sheep
Content-Type: application/json
Content-Length: part_content_length
If-Match: "etag/sheep"

{
  "animalName": "sheep",
  "animalAge": "5"
  "peltColor": "green",
}

--batch_foobarbaz
Content-Type: application/http
Content-ID: <item3:12930812@barnyard.example.com>

GET /farm/v1/animals
If-None-Match: "etag/animals"

--batch_foobarbaz--

I've built a diary sync program which works well. It creates and populates a diary from our application. However the populating takes a long time, hence batch entry.

I want to use php and curl as the synch program was written in this way. I have used the PHP libraries in the past but don't want to use them for this.

Check this link https://code.google.com/p/google-api-php-client/source/browse/trunk/src/service/Google_BatchRequest.php?r=490 — SGC, Nov 20 '14 at 22:40
Also, check this http://stackoverflow.com/questions/17840333/google-calendar-api-batch-request-php — SGC, Nov 20 '14 at 22:48
Thanks for the answers. I don't really want to use the Google APIs Client Library for PHP this time as I've made a small and lean program submitting the requests using PHP curl. It works a faster and takes up less memory. I was hoping to submit the batch request through curl. The batch looks like a good alternative to submitting each event individually because when the submissions are kept to less than 5 per second it can take time. I'm also watching the calendar so each request causes a notification which seems wasteful. — Colin Martin, Nov 21 '14 at 11:46
Make sure to respect the empty lines. The request is indeed sent to "/batch" endpoint (it's not calendar specific). — luc, Nov 25 '14 at 02:27

score 1 · Answer 1 · answered Dec 28 '14 at 20:46

Here are my 2 cents:

I go through a list of events I scheduled in my LOCAL postgres database and that I synchronized with Google Calendar. I want to check if I modified them directly on Google Calendar (and not on my database).

Basically, in PHP, I wrote:

$batch = '';
$boundary = '--my_boundary';
$i = 0;
while ($event = pg_fetch_array($list_of_events)){
    $batch .= "\n" . $boundary . "\nContent-Type: application/http\nContent-ID: " . $event['meeting_id'] . "\n\nGET /calendar/v3/calendars/primary/events/" . $event['meeting_id'] . " \nIf-None-Match: \"" . $event['etag'] . "\"\n";
    $i ++ ;
    if ($i > 48){
        // we need to split the batch by packs of <50. Close this one and create the next one
        $batch .= "\n" . $boundary . "\n";
        $batches[] = $batch;
        $batch = '' ;
        $i=0;
    }
}
// close the current batch pack
if ($i > 0) $batches[] = $batch . "\n" . $boundary . "\n";

// send the packs. This can surely be optimized.
for ($i = 0 ; $i < count($batches) ; $i++) {
    $session = curl_init('https://www.googleapis.com/batch');
    curl_setopt($session, CURLOPT_POST, true);
    curl_setopt($session, CURLOPT_HTTPHEADER, array('Host: www.googleapis.com', 'Content-Type: multipart/mixed; boundary=' . $boundary, 'Authorization:  Bearer ' . $token, 'Content-Length: ' . strlen( $batches[$i])));
    curl_setopt ($session, CURLOPT_POSTFIELDS,  $batches[$i]);
    curl_setopt($session, CURLOPT_HEADER, true);
    curl_setopt($session, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($session, CURLOPT_VERBOSE, true);
    curl_setopt($session, CURLINFO_HEADER_OUT, true);
    curl_setopt($session, CURLOPT_SSL_VERIFYPEER, false);

    $resp = curl_exec($session);
    $api_response_info = curl_getinfo($session);
    $pack_of_answers = substr($resp, $api_response_info['header_size']);
    curl_close($session);

    // the pack of answers is in $pack_of_answers. You can split them thanks to a boundary, and deal with them at your convenience.
}

this solution is not working for me. Getting the response as bad request. Can you show me a sample value for $event['etag'] — Jobz, Dec 11 '17 at 07:27

Google Calendar API using PHP curl for batch

1 Answers1