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    copied!<p>there were a few bugs in the originally posted code, so here's a corrected version that works for me.</p> <pre><code>from struct import pack from OpenSSL import SSL from twisted.internet import reactor from twisted.internet.protocol import ClientFactory, Protocol from twisted.internet.ssl import ClientContextFactory import binascii import struct APNS_SERVER_HOSTNAME = "gateway.sandbox.push.apple.com" APNS_SERVER_PORT = 2195 APNS_SSL_CERTIFICATE_FILE = "&lt;your ssl certificate.pem&gt;" APNS_SSL_PRIVATE_KEY_FILE = "&lt;your ssl private key.pem&gt;" DEVICE_TOKEN = "&lt;hexlified device token&gt;" MESSAGE = '{"aps":{"alert":"twisted test"}}' class APNSClientContextFactory(ClientContextFactory): def __init__(self): self.ctx = SSL.Context(SSL.SSLv3_METHOD) self.ctx.use_certificate_file(APNS_SSL_CERTIFICATE_FILE) self.ctx.use_privatekey_file(APNS_SSL_PRIVATE_KEY_FILE) def getContext(self): return self.ctx class APNSProtocol(Protocol): def connectionMade(self): print "connection made" self.sendMessage(binascii.unhexlify(DEVICE_TOKEN), MESSAGE) self.transport.loseConnection() def sendMessage(self, deviceToken, payload): # notification messages are binary messages in network order # using the following format: # &lt;1 byte command&gt; &lt;2 bytes length&gt;&lt;token&gt; &lt;2 bytes length&gt;&lt;payload&gt; fmt = "!cH32sH%ds" % len(payload) command = '\x00' msg = struct.pack(fmt, command, 32, deviceToken, len(payload), payload) print "%s: %s" %(binascii.hexlify(deviceToken), binascii.hexlify(msg)) self.transport.write(msg) class APNSClientFactory(ClientFactory): def buildProtocol(self, addr): print "Connected to APNS Server %s:%u" % (addr.host, addr.port) return APNSProtocol() def clientConnectionLost(self, connector, reason): print "Lost connection. Reason: %s" % reason def clientConnectionFailed(self, connector, reason): print "Connection failed. Reason: %s" % reason if __name__ == '__main__': reactor.connectSSL(APNS_SERVER_HOSTNAME, APNS_SERVER_PORT, APNSClientFactory(), APNSClientContextFactory()) reactor.run() </code></pre>
 

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