android push notification to many devices at once time using google c2dm

Question

I have successfully implemented the android push notification using google c2dm. I always send a post request for a device, and one device delay 1-2 seconds. So, if I have 1000 devices, my script will need more than 1000 seconds to finish the push to all devices.

The thing I want to know is, can we send the post request for all devices to google c2dm? If we can, how to do?

I'm using PHP script.

Here is my code to push a message to a device:

function sendMessageToPhone($authCode, $deviceRegistrationId, $msgType, $messageText, $infoType, $messageInfo) {

    $headers = array('Authorization: GoogleLogin auth=' . $authCode);
    $data = array(
        'registration_id' => $deviceRegistrationId,
        'collapse_key' => $msgType,
        'data.message' => $messageText,
        'data.type'    => $infoType,
        'data.data'    => $messageInfo
    );

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, "https://android.apis.google.com/c2dm/send");
    if ($headers)
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

    $response = curl_exec($ch);

    curl_close($ch);

    return $response;
}

If I have more devices I loop it like this:

while($row = mysql_fetch_assoc($result)) {

    sendMessageToPhone($authCode, $row['deviceRegistrationId'], GOOGLE_MSG_TYPE, $messageText, $infoType, $messageInfo);

}

Thank for helping.

You should add the fragment of you code that shows how you send your events so that suggestions can be made. — hakre, Jan 02 '12 at 08:50

grunk · Answer 1 · 2012-01-02T10:45:21.050

2

The authentification is the most expansive (in time) action in the all process, that probably why you have a 1 second delay between each send.

To speed up the process , you should not authenticate each time. Simply auth once ,and get the Auth token. This token has a certain TTL but nothing is specified by Google. Then loop over your devices, and send using the previous auth token. The auth token can change (rarely) and can be found in the response header Update-Client-Auth.

The all process shouldn't take more the few hundred ms by device.

Also consider using stream instead of curl

edited Jan 02 '12 at 10:45

answered Jan 02 '12 at 10:24

grunk

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So, can u lead me to do that? – Kannika Jan 03 '12 at 02:55
You already have done all the job. Just be sure to auth once (and not each time you send a msg). Maybe add some benchmarking into your code to find the part which slow down the script. Using stream is not mandatory. – grunk Jan 03 '12 at 07:37

score 0 · Answer 2 · edited Sep 25 '12 at 11:49

function sendMessageToPhone($authCode, $deviceRegistrationId, $msgType, $messageText, $infoType, $messageInfo) {

    $headers = array('Authorization: GoogleLogin auth=' . $authCode);
    $data = array(
        'registration_id' => $deviceRegistrationId,
        'collapse_key' => $msgType,
        'data.message' => $messageText,
        'data.type'    => $infoType,
        'data.data'    => $messageInfo
    );

    $ch = curl_init();

    curl_setopt($ch, CURLOPT_URL, "https://android.apis.google.com/c2dm/send");
    if ($headers)
        curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

    $response = curl_exec($ch);

    curl_close($ch);

    return $response;
}

android push notification to many devices at once time using google c2dm

2 Answers2