iPhone Push Notification - Error response problem

Question

I've got a problem when checking for a response error after sending a Push Notification. This is my setup:

From my PHP server, I'm sending Push Notifications. These notifications are send in the enhanced format, so I can get an error response from the Apple server. For example: Error #7 "Invalid payload size".

The way I check for errors is reading the socket response:

const ERROR_RESPONSE_SIZE = 6;
$errorResponse = @fread($this->_apnsSocket, self::ERROR_RESPONSE_SIZE);

This works fine when there is an actual error. By my problem is: when there's no error, the "fread" call doesn't return anything and keeps loading forever.

Can anyone help me with this? Thanks for your help!

Fico

Answer 1

You need to set stream_set_blocking($this->_apnsSocket, 0); to 0 which is non-blocking mode, because on success Apple doesn't send back anything, but the fread is waiting for data in blocking mode.

Scintillation

This will work except it will also cause fread to return immediately before the error has a chance to be sent. So what you can do is an additional check for errors once you finish sending all your push notifications. Send all push, then pause for half a second, then use fread one more time to check for any errors that may have occurred with the last few push notifications that were sent. I tested this with causing an error on the last push message sent, then pausing for different lengths of time (tried up to 5 minutes), then doing an fread and the error was still there waiting to be read. – Foxtail