.Net Core 与 APNs通信给用户设备发送 UserNotifications

"date" : "2020-06-12 03:03:27"
"classfiy" : "swift"
"author" : "飞扬"
"viewTimes" : 322

### made 以后请面向 google 编程...
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1. 在[开发者后台](https://developer.apple.com/account/resources "开发者后台")申请一个 Tpye 为 Apple Push Services 的 Certificates，申请过程中按照提示做就可以了。
2. **要注意的地方：最后一步他会让上传一个 Certificate Signing Request 文件** 这个文件在这里创建： [官方说明](https://help.apple.com/developer-account/#/devbfa00fef7 "官方说明")
3. 创建完毕后下载此证书导入到mac里，然后在mac的钥匙串里右键此证书导出一个 .p12 后缀并带有密码的文件，此文件在和APNs交互的时候必须用到。

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这里是通过APNs给用户发通知的代码:
```csharp
using System;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Net.Security;
using System.Security.Cryptography.X509Certificates;
using System.Text;
using System.Threading.Tasks;
using Newtonsoft.Json;
using System.Collections.Generic;

namespace Test.APNs
{
    class NotificationModel
    {
        public NotificationBodyModel aps { get; set; }
    }

    class NotificationBodyModel
    {
        public UserInfo alert { get; set; }
        public string sound { get; set; }
        public int badge { get; set; }
    }

    class UserInfo
    {
        public string title { get; set; }
        public string subtitle { get; set; }
        public string body { get; set; }
    }

    class Program
    {
        static void Main(string[] args)
        {

            var model = new NotificationModel();
            model.aps = new NotificationBodyModel() {
                sound= "default",
                badge = 0
            };
            model.aps.alert = new UserInfo()
            {
                title = "这是一个推送",
                //subtitle = "标题2",
                body = "内容",
            };
            var datastr = JsonConvert.SerializeObject(model);

            var handler = new HttpClientHandler();
            X509Certificate2 certificate = new X509Certificate2("/Users/fysmart/Desktop/ApplePushServices_Fysmart_tools.p12", "password");
            handler.ClientCertificates.Add(certificate);

            var client = new HttpClient(handler);
            var request = new HttpRequestMessage(HttpMethod.Post, "https://api.development.push.apple.com/3/device/33c5912dbf02593a82jg62gsb53616608f3b3fb423d8c25f3467989c878c74");
            request.Version = new Version(2, 0);
            request.Content = new StringContent(datastr);
            request.Headers.Add("apns-push-type", "alert");
            request.Headers.Add("apns-expiration", "0");
            request.Headers.Add("apns-priority", "10");
            request.Headers.Add("apns-topic", "com.fysmart.*****-*****");

            var response = client.SendAsync(request).GetAwaiter().GetResult();
            if (response.StatusCode == HttpStatusCode.OK)
            {
                IEnumerable<string> values;
                response.Headers.TryGetValues("apns-id", out values);
                var a = values.GetEnumerator();
                var id = a.MoveNext() ? a.Current : "";
                Console.WriteLine("push 成功,apns-id:" + id);
            }
            else
            {
                Console.WriteLine("Response: " + response.Content.ReadAsStringAsync().GetAwaiter().GetResult());
            }

            Console.ReadLine();
        }
    }
}
```