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copied!<p>I hope this is relevant (slightly), but I have just successfully created one for Java, so conceptually quite similar to C# (except perhaps the SSL stuff, but that shouldn't be too hard to modify. Below is a sample message payload and crypto setup:</p> <pre><code> int port = 2195; String hostname = "gateway.sandbox.push.apple.com"; char []passwKey = "<keystorePassword>".toCharArray(); KeyStore ts = KeyStore.getInstance("PKCS12"); ts.load(new FileInputStream("/path/to/apn_keystore/cert.p12"), passwKey); KeyManagerFactory tmf = KeyManagerFactory.getInstance("SunX509"); tmf.init(ts,passwKey); SSLContext sslContext = SSLContext.getInstance("TLS"); sslContext.init(tmf.getKeyManagers(), null, null); SSLSocketFactory factory =sslContext.getSocketFactory(); SSLSocket socket = (SSLSocket) factory.createSocket(hostname,port); // Create the ServerSocket String[] suites = socket.getSupportedCipherSuites(); socket.setEnabledCipherSuites(suites); //start handshake socket.startHandshake(); // Create streams to securely send and receive data to the server InputStream in = socket.getInputStream(); OutputStream out = socket.getOutputStream(); // Read from in and write to out... ByteArrayOutputStream baos = new ByteArrayOutputStream(); baos.write(0); //The command System.out.println("First byte Current size: " + baos.size()); baos.write(0); //The first byte of the deviceId length baos.write(32); //The deviceId length System.out.println("Second byte Current size: " + baos.size()); String deviceId = "<heaxdecimal representation of deviceId"; baos.write(hexStringToByteArray(deviceId.toUpperCase())); System.out.println("Device ID: Current size: " + baos.size()); String payload = "{\"aps\":{\"alert\":\"I like spoons also\",\"badge\":14}}"; System.out.println("Sending payload: " + payload); baos.write(0); //First byte of payload length; baos.write(payload.length()); baos.write(payload.getBytes()); out.write(baos.toByteArray()); out.flush(); System.out.println("Closing socket.."); // Close the socket in.close(); out.close(); </code></pre> <p>}</p> <p>Once again, not C#, but at least closer than the poor ObjC sample that Apple provides.</p>

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