Apple Push with proxy and stream_context - php

Question

I have to send push notification to iOS devices. My connection has to be enabled through a proxy. I tried everything but without success. I have an error 110 Connection Timed Out. It's working with cURL if I just try to connect to Apple push's address. I don't know where the problem is. Proxy config ? PHP stream_context wrong implementation ?
Here's my code :
$ctx = stream_context_create();
stream_context_set_option($ctx, 'ssl', 'local_cert', 'certificate.pem');
stream_context_set_option($ctx, 'ssl', 'passphrase', 'my_passphrase');
stream_context_set_option($ctx, 'ssl', 'verify_peer', false);
stream_context_set_option($ctx, 'http', 'proxy', 'tcp://my-proxy.net:8080');
stream_context_set_option($ctx, 'http', 'request_fulluri', true);
$fp = stream_socket_client('ssl://gateway.sandbox.push.apple.com:2195', $err,$errstr, 60, STREAM_CLIENT_CONNECT, $ctx);
var_dump($fp);
var_dump($err);
var_dump($errstr);
exit;
Do you have an idea ?
EDIT:
Can it be directly linked to Squid ? I just figured out the proxy is running with Squid.
I also try with fopen() function instead of stream_socket_client() but it seems it doesn't allow ssl protocol.
Here's my var_dump outputs : bool(false) int(110) string(20) "Connection timed out"
I also have this warning : Warning: stream_socket_client(): unable to connect to ssl://gateway.sandbox.push.apple.com:2195 (Connection timed out) in /share/www/website/test.php on line 22

Answer 1

It could simply be your proxy does not allow port 2195 to be opened.
iPhone Push Notification Unable to Connect to the SSL Server
I guess you either:
Need to talk to the people who run the proxy to see if port 2195 is open or not.
or
Setup a test server listening on port 2195 and then try to do a test connection to it through the proxy. That should allow you to test if it is the proxy that is blocking the connection requests.
or
Test whether Curl can open the connection using a proxy.
Which is done by setting the options:
// sets the proxy to go through
curl_setopt($ch, CURLOPT_PROXY, $proxy);
// sets to use a tunnel proxy which most http proxies are
curl_setopt($ch, CURLOPT_HTTPTUNNELPROXY, $proxy);
Full testing code here.

Answer 2

create the SSL context
open a tcp socket to the proxy
send request to the proxy to connect to APNs
once connexion is accepted enable SSL
Have a look at my reply in this post: Send Push Notification to APNS through proxy