Question

我是Azure Event Grid和Webhooks的新手。

如何将我的.net mvc web api应用程序绑定到Microsoft Azure Event Grid？

简而言之，我想，只要将新文件添加到blob存储，Azure Event网格就应该通知我的web api应用程序。

我试过以下文章，但没有运气 https://docs.microsoft.com/en-us/azure/storage/blobs/storage-blob-event-quickstart

Answer 1

如何将我的.net mvc web api应用程序绑定到Microsoft Azure Event Grid？简而言之，我想，只要将新文件添加到blob存储，Azure Event网格就应该通知我的web api应用程序。

我做了一个演示，它在我身边正常工作。您可以参考以下步骤：

1.使用函数

创建一个演示RestAPI项目

 public string Post([FromBody] object value) //Post
 {
      return $"value:{value}";
 }

2.如果我们想要使用Azure Event Grid集成azure存储，我们需要在位置 West US2 或 West Central US 中创建blob storage account。更多细节可以参考屏幕截图。

2.创建存储帐户键入事件订阅并绑定自定义API端点

3.将blob上载到blob存储并从Rest API检查。

Answer 2

您可以通过创建一个自定义端点来完成此操作，该端点将订阅从Event Grid发布的事件。您引用的文档使用Request Bin作为订阅者。而是在MVC应用程序中创建Web API端点以接收通知。您必须支持验证请求才能使您拥有有效的订阅者，然后您就可以开始运行了。

示例：

    public async Task<HttpResponseMessage> Post()
    {
        if (HttpContext.Request.Headers["aeg-event-type"].FirstOrDefault() == "SubscriptionValidation")
        {
            using (var reader = new StreamReader(Request.Body, Encoding.UTF8))
            {
                var result = await reader.ReadToEndAsync();
                var validationRequest = JsonConvert.DeserializeObject<GridEvent[]>(result);
                var validationCode = validationRequest[0].Data["validationCode"];

                var validationResponse = JsonConvert.SerializeObject(new {validationResponse = validationCode});
                return new HttpResponseMessage
                {
                    StatusCode = HttpStatusCode.OK, 
                    Content = new StringContent(validationResponse)
                };                       
            }
        }

        // Handle normal blob event here

        return new HttpResponseMessage { StatusCode = HttpStatusCode.OK };
    }

Answer 3

以下是如何使用Web API处理它的最新示例。您还可以从此处查看和部署工作示例：https://github.com/dbarkol/azure-event-grid-viewer

    [HttpPost]
    public async Task<IActionResult> Post()
    {
        using (var reader = new StreamReader(Request.Body, Encoding.UTF8))
        {
            var jsonContent = await reader.ReadToEndAsync();

            // Check the event type.
            // Return the validation code if it's 
            // a subscription validation request. 
            if (EventTypeSubcriptionValidation)
            {
                var gridEvent =
                    JsonConvert.DeserializeObject<List<GridEvent<Dictionary<string, string>>>>(jsonContent)
                        .First();


                // Retrieve the validation code and echo back.
                var validationCode = gridEvent.Data["validationCode"];
                return new JsonResult(new{ 
                    validationResponse = validationCode
                });
            }
            else if (EventTypeNotification)
            {
                // Do more here...
                return Ok();                 
            }
            else
            {
                return BadRequest();
            }
        }

    }

public class GridEvent<T> where T: class
{
    public string Id { get; set;}
    public string EventType { get; set;}
    public string Subject {get; set;}
    public DateTime EventTime { get; set; } 
    public T Data { get; set; } 
    public string Topic { get; set; }
}

Answer 4

您还可以使用Microsoft.Azure.EventGrid nuget包。

来自以下文章（贷记为gldraphael）：https://gldraphael.com/blog/creating-an-azure-eventgrid-webhook-in-asp-net-core/

[Route("/api/webhooks"), AllowAnonymous]
public class WebhooksController : Controller
{
    // POST: /api/webhooks/handle_ams_jobchanged
    [HttpPost("handle_ams_jobchanged")] // <-- Must be an HTTP POST action
    public IActionResult ProcessAMSEvent(
        [FromBody]EventGridEvent[] ev, // 1. Bind the request
        [FromServices]ILogger<WebhooksController> logger)
    {
        var amsEvent = ev.FirstOrDefault(); // TODO: handle all of them!
        if(amsEvent == null) return BadRequest();

        // 2. Check the eventType field
        if (amsEvent.EventType == EventTypes.MediaJobStateChangeEvent)
        {
            // 3. Cast the data to the expected type
            var data = (amsEvent.Data as JObject).ToObject<MediaJobStateChangeEventData>();

            // TODO: do your thing; eg:
            logger.LogInformation(JsonConvert.SerializeObject(data, Formatting.Indented));
        }

        // 4. Respond with a SubscriptionValidationResponse to complete the 
        // event subscription handshake.
        if(amsEvent.EventType == EventTypes.EventGridSubscriptionValidationEvent)
        {
            var data = (amsEvent.Data as JObject).ToObject<SubscriptionValidationEventData>();
            var response = new SubscriptionValidationResponse(data.ValidationCode);
            return Ok(response);
        }
        return BadRequest();
    }
}

使用Azure Event Grid和blob存储

4 个答案: