Sending notifications via APNS using Apple's new HTTP/2 API

苹果的消息推送接口被开发人员诟病许久，终于推出了http2接口，payload的大小从255增加到了4k，协议也从binary改成了http，花了一天的时间，测试新的推送，也踩了不少坑，网上的资料也是残缺不全，在此记录一下。

https://github.com/CleverTap/apns-http2下载源码编译。

使用苹果证书，采用异步模式，官方示例如下。

FileInputStream cert = new FileInputStream("/path/to/certificate.p12");
final ApnsClient client = new ApnsClientBuilder().withProductionGateway().inAsynchronousMode().withCertificate(cert).withPassword("").withDefaultTopic("<your app's topic>").build();

Notification n = new Notification.Builder("<the device token>").alertBody("Hello").build();

client.push(n, new NotificationResponseListener() {@Overridepublic void onSuccess(Notification notification) {System.out.println("success!");}@Overridepublic void onFailure(Notification notification, NotificationResponse nr) {System.out.println("failure: " + nr);}
});

1.NotificationResponse{error=null, httpStatusCode=-1, responseBody='null', cause=javax.NET.ssl.SSLHandshakeException: Received fatal alert: handshake_failure}

升级JDK到1.8

2.NotificationResponse{error=null, httpStatusCode=-1, responseBody='null', cause=Java.io.IOException: unexpected end of stream on okhttp3.Address@74be3a63}

缺少jar包，仔细阅读apns-http2的Readme文档，发现其中一行：

Ensure that you have Jetty's ALPN JAR (OkHttp requires it) in your boot classpath

https://github.com/jetty-project/jetty-alpn/

3.NotificationResponse{error=BadRequest, httpStatusCode=400, responseBody='{"reason":"TopicDisallowed"}', cause=null}

topic设置为：appid

至此，apns的推送终于成功了，payload有了质的飞跃，但是同时推送速度比之前慢了不少。需要有VPN或者VPS来翻墙加速。