发送推送通知时，存在以下几个问题：
如果有问题，Apple会断开您的连接，但您不知道。使用基本通知时，无法知道它们是否全部发送。解决方案：这就是使用增强通知然后检查错误响应的全部意义所在。请注意，我们将在数据库查询中使用“ORDER BY ID”，然后使用id作为我们在通知中发送的标识符。这样，如果出现问题，我们就可以确切地知道数据库中的哪一行导致了问题（因此我们知道Apple何时断开了我们的连接并停止发送通知）。然后，我们可以继续将推送通知发送到导致问题的行之后的所有行，而不必重新发送到我们已经发送到的行。
如果一切正常，Apple 不会发送任何响应，因此这可能会导致您的脚本暂停并永远等待，而 fread（） 正在等待未到来的数据。溶液：需要将stream_set_blocking设置为 0，以便 fread 始终立即返回。请注意，这会导致另一个小问题，fread可以在收到错误响应之前返回，但请参阅代码中的解决方法，即在所有发送完成后暂停1/2秒，然后再次检查fread。
您可以发送多个推送通知，这比回复您所需的错误响应要快得多。溶液：同样，这与上面提到的解决方法相同...完成所有发送后，暂停 1/2 秒，然后再次检查 fread。
这是我使用PHP的解决方案，它解决了我遇到的所有问题。它非常基本，但可以完成工作。我已经通过一次发送几个通知以及一次发送120，000个通知对其进行了测试。
<?php
/*
* Read Error Response when sending Apple Enhanced Push Notification
*
* This assumes your iOS devices have the proper code to add their device tokens
* to the db and also the proper code to receive push notifications when sent.
*
*/
//database
$host = "localhost";
$user = "my_db_username";
$pass = "my_db_password";
$dbname = "my_db_name";
$con = mysql_connect($host, $user, $pass);
if (!$con) {
die('Could not connect to database: ' . mysql_error());
} else {
mysql_select_db($dbname, $con);
}
// IMPORTANT: make sure you ORDER BY id column
$result = mysql_query("SELECT id,token FROM `device_tokens` ORDER BY id");
//Setup notification message
$body = array();
$body['aps'] = array('alert' => 'My push notification message!');
$body['aps']['notifurl'] = 'http://www.myexampledomain.com';
$body['aps']['badge'] = 1;
//Setup stream (connect to Apple Push Server)
$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'passphrase', 'password_for_apns.pem_file');
stream_context_set_option($ctx, 'ssl', 'local_cert', 'apns.pem');
$fp = stream_socket_client('ssl://gateway.push.apple.com:2195', $err, $errstr, 60, STREAM_CLIENT_CONNECT, $ctx);
stream_set_blocking ($fp, 0); //This allows fread() to return right away when there are no errors. But it can also miss errors during last seconds of sending, as there is a delay before error is returned. Workaround is to pause briefly AFTER sending last notification, and then do one more fread() to see if anything else is there.
if (!$fp) {
//ERROR
echo "Failed to connect (stream_socket_client): $err $errstrn";
} else {
$apple_expiry = time() + (90 * 24 * 60 * 60); //Keep push alive (waiting for delivery) for 90 days
//Loop thru tokens from database
while($row = mysql_fetch_array($result)) {
$apple_identifier = $row["id"];
$deviceToken = $row["token"];
$payload = json_encode($body);
//Enhanced Notification
$msg = pack("C", 1) . pack("N", $apple_identifier) . pack("N", $apple_expiry) . pack("n", 32) . pack('H*', str_replace(' ', '', $deviceToken)) . pack("n", strlen($payload)) . $payload;
//SEND PUSH
fwrite($fp, $msg);
//We can check if an error has been returned while we are sending, but we also need to check once more after we are done sending in case there was a delay with error response.
checkAppleErrorResponse($fp);
}
//Workaround to check if there were any errors during the last seconds of sending.
usleep(500000); //Pause for half a second. Note I tested this with up to a 5 minute pause, and the error message was still available to be retrieved
checkAppleErrorResponse($fp);
echo 'DONE!';
mysql_close($con);
fclose($fp);
}
//FUNCTION to check if there is an error response from Apple
// Returns TRUE if there was and FALSE if there was not
function checkAppleErrorResponse($fp) {
//byte1=always 8, byte2=StatusCode, bytes3,4,5,6=identifier(rowID). Should return nothing if OK.
$apple_error_response = fread($fp, 6);
//NOTE: Make sure you set stream_set_blocking($fp, 0) or else fread will pause your script and wait forever when there is no response to be sent.
if ($apple_error_response) {
//unpack the error response (first byte 'command" should always be 8)
$error_response = unpack('Ccommand/Cstatus_code/Nidentifier', $apple_error_response);
if ($error_response['status_code'] == '0') {
$error_response['status_code'] = '0-No errors encountered';
} else if ($error_response['status_code'] == '1') {
$error_response['status_code'] = '1-Processing error';
} else if ($error_response['status_code'] == '2') {
$error_response['status_code'] = '2-Missing device token';
} else if ($error_response['status_code'] == '3') {
$error_response['status_code'] = '3-Missing topic';
} else if ($error_response['status_code'] == '4') {
$error_response['status_code'] = '4-Missing payload';
} else if ($error_response['status_code'] == '5') {
$error_response['status_code'] = '5-Invalid token size';
} else if ($error_response['status_code'] == '6') {
$error_response['status_code'] = '6-Invalid topic size';
} else if ($error_response['status_code'] == '7') {
$error_response['status_code'] = '7-Invalid payload size';
} else if ($error_response['status_code'] == '8') {
$error_response['status_code'] = '8-Invalid token';
} else if ($error_response['status_code'] == '255') {
$error_response['status_code'] = '255-None (unknown)';
} else {
$error_response['status_code'] = $error_response['status_code'] . '-Not listed';
}
echo '<br><b>+ + + + + + ERROR</b> Response Command:<b>' . $error_response['command'] . '</b> Identifier:<b>' . $error_response['identifier'] . '</b> Status:<b>' . $error_response['status_code'] . '</b><br>';
echo 'Identifier is the rowID (index) in the database that caused the problem, and Apple will disconnect you from server. To continue sending Push Notifications, just start at the next rowID after this Identifier.<br>';
return true;
}
return false;
}
?>
