Question

我正在尝试弄清楚如何使用AWS .NET SDK来确认订阅SNS主题。

订阅是通过HTTP

端点将位于.net mvc网站中。

我在任何地方找不到任何.net示例？

一个工作的例子太棒了。

我正在尝试这样的事情

 Dim snsclient As New Amazon.SimpleNotificationService.AmazonSimpleNotificationServiceClient(ConfigurationSettings.AppSettings("AWSAccessKey"), ConfigurationSettings.AppSettings("AWSSecretKey"))

    Dim TopicArn As String = "arn:aws:sns:us-east-1:991924819628:post-delivery"


    If Request.Headers("x-amz-sns-message-type") = "SubscriptionConfirmation" Then

        Request.InputStream.Seek(0, 0)
        Dim reader As New System.IO.StreamReader(Request.InputStream)
        Dim inputString As String = reader.ReadToEnd()

        Dim jsSerializer As New System.Web.Script.Serialization.JavaScriptSerializer
        Dim message As Dictionary(Of String, String) = jsSerializer.Deserialize(Of Dictionary(Of String, String))(inputString)

        snsclient.ConfirmSubscription(New Amazon.SimpleNotificationService.Model.ConfirmSubscriptionRequest With {.AuthenticateOnUnsubscribe = False, .Token = message("Token"), .TopicArn = TopicArn})


   End If

Answer 1

以下是使用MVC WebApi 2和最新AWS .NET SDK的工作示例。

var jsonData = Request.Content.ReadAsStringAsync().Result;
var snsMessage = Amazon.SimpleNotificationService.Util.Message.ParseMessage(jsonData);

//verify the signaure using AWS method
if(!snsMessage.IsMessageSignatureValid())
    throw new Exception("Invalid signature");

if(snsMessage.Type == Amazon.SimpleNotificationService.Util.Message.MESSAGE_TYPE_SUBSCRIPTION_CONFIRMATION)
{
    var subscribeUrl = snsMessage.SubscribeURL;
    var webClient = new WebClient();
    webClient.DownloadString(subscribeUrl);
    return "Successfully subscribed to: " + subscribeUrl;
}

Answer 2

基于@ Craig上面的回答（这对我有很大帮助），下面是一个ASP.NET MVC WebAPI控制器，用于消费和自动订阅SNS主题。 #WebHooksFTW

using RestSharp;
using System;
using System.Net;
using System.Net.Http;
using System.Reflection;
using System.Web.Http;
using System.Web.Http.Description;

namespace sb.web.Controllers.api {
  [System.Web.Mvc.HandleError]
  [AllowAnonymous]
  [ApiExplorerSettings(IgnoreApi = true)]
  public class SnsController : ApiController {
    private static string className = MethodBase.GetCurrentMethod().DeclaringType.Name;

    [HttpPost]
    public HttpResponseMessage Post(string id = "") {
      try {
        var jsonData = Request.Content.ReadAsStringAsync().Result;
        var sm = Amazon.SimpleNotificationService.Util.Message.ParseMessage(jsonData);
        //LogIt.D(jsonData);
        //LogIt.D(sm);

        if (!string.IsNullOrEmpty(sm.SubscribeURL)) {
          var uri = new Uri(sm.SubscribeURL);
          var baseUrl = uri.GetLeftPart(System.UriPartial.Authority);
          var resource = sm.SubscribeURL.Replace(baseUrl, "");
          var response = new RestClient {
            BaseUrl = new Uri(baseUrl),
          }.Execute(new RestRequest {
            Resource = resource,
            Method = Method.GET,
            RequestFormat = RestSharp.DataFormat.Xml
          });
          if (response.StatusCode != System.Net.HttpStatusCode.OK) {
            //LogIt.W(response.StatusCode);
          } else {
            //LogIt.I(response.Content);
          }
        }

        //read for topic: sm.TopicArn
        //read for data: dynamic json = JObject.Parse(sm.MessageText);
        //extract value: var s3OrigUrlSnippet = json.input.key.Value as string;

        //do stuff
        return Request.CreateResponse(HttpStatusCode.OK, new { });
      } catch (Exception ex) {
        //LogIt.E(ex);
        return Request.CreateResponse(HttpStatusCode.InternalServerError, new { status = "unexpected error" });
      }
    }
  }
}

Answer 3

以下示例帮助我使用SNS。它完成了使用主题的所有步骤。在这种情况下，订阅请求是一个电子邮件地址，但可以更改为HTTP。

Pavel's SNS Example
Documentation

Answer 4

我最终使用显示的代码使其工作。我在开发服务器上捕获异常时遇到了麻烦，结果是告诉我服务器的时间与SNS消息中的时间戳不匹配。

一旦服务器的时间被修复（亚马逊服务器BTW），确认就有效了。

Answer 5

正如@cmilam回答的那样，您应该安装aws sdk（名称为“ AWSSDK.SimpleNotificationService”，https://github.com/aws/aws-sdk-net/）。安装此软件包后，依赖关系已解决。

使用AWS .NET SDK进行SNS订阅确认示例

5 个答案: