[iOS] Apple Push Notification Service - 實作 Server 端

在上一篇 [iOS] Google Cloud Messaging for iOS 完整說明了 iOS app 實作以及 GCM Server 的實作。這篇將補齊 APNS Server 端的實作方式。

1. 製作 ck.pem 供 APNS Server 使用
• 輸出 Push Notification Service 憑證 ([iOS] Google Cloud Messaging for iOS 有說明製作方法)，儲存成 cert.p12

• 展開 Push Notification Service 憑證，輸出該專用金鑰，儲存成 key.p12
  
• 使用終端機並指到上列兩個檔案的儲存地，依序輸入下列指令

openssl pkcs12 -clcerts -nokeys -out cert.pem -in cert.p12

openssl pkcs12 -nocerts -out key.pem -in key.p12

cat cert.pem key.pem > ck.pem

• 將 ck.pem 放置 Server 上
2. 完整 PHP 程式碼

// Put your device token here (without spaces):
$deviceToken = 'iOS App 的 DeviceToken';

// Put your private key's passphrase here:
$passphrase = 'ck.pem 的金鑰';

// Put your alert message here:
$message = 'Hello APNS!';

$ctx = stream_context_create();
//stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem');
stream_context_set_option($ctx, 'ssl', 'local_cert', 'ck.pem');
stream_context_set_option($ctx, 'ssl', 'passphrase', $passphrase);

// Open a connection to the APNS server
$fp = stream_socket_client(
    'ssl://gateway.sandbox.push.apple.com:2195', $err,
    $errstr, 60, STREAM_CLIENT_CONNECT|STREAM_CLIENT_PERSISTENT, $ctx);

if (!$fp)
    exit("Failed to connect: $err $errstr" . PHP_EOL);

echo 'Connected to APNS' . PHP_EOL;

// Create the payload body
$body['aps'] = array(
    'alert' => $message,
    'sound' => 'default'
);

// Encode the payload as JSON
$payload = json_encode($body);

// Build the binary notification
$msg = chr(0) . pack('n', 32) . pack('H*', $deviceToken) . pack('n', strlen($payload)) . $payload;

// Send it to the server
$result = fwrite($fp, $msg, strlen($msg));

if (!$result)
    echo 'Message not delivered' . PHP_EOL;
else
    echo 'Message successfully delivered' . PHP_EOL;

// Close the connection to the server
fclose($fp);