For the purposes of this article, we will be demonstrating the manual, NuGet approach.īefore we configure the project to use GitHub WebHooks, we need to configure WebHooks on a GitHub repo. Brady Gaster has a great video in the announcement blog post of the extension demonstrating usage of the extension. taking advantage of the WebHooks extension. installing the Nuget packages (, and other specific receiver packages), configuring the WebHook receiver and manually writing the WebHook handler ORī. This can be done in one of the two ways:Ī. Now we need to add WebHooks to this application. In the Azure Web App hosting dialog box, enter URL of the application and hit the OK button. In addition to this, since only a public domain can ping back another public domain, hosting on Azure makes our app public. To make it a bit easier to setup, choose the Web API checkbox in the New ASP.NET Project dialog.Īs most of the WebHook providers are hosted on HTTPS and they expect the receivers also to use HTTPS protocol, host this application on Azure to get SSL for free. Open Visual Studio 2015 or, 2013 and create a new empty ASP.NET 4.5 application. Now that we have some understanding on what WebHooks are and how they work in ASP.NET, let’s build an application to understand how WebHooks from GitHub can be received in an ASP.NET application. Implementing a GitHub WebHook Client using ASP.NET WebHooks The data may be stored in a database, may be sent to the client and displayed on the UI or, may be logged on the server based upon the need of the application. Then it is responsibility of the application to use this data. WebHook handler is the component that gives us access to the data received from the source. The receiver validates the request and then sends it to the WebHook handler.The Web API controller handling the HTTP POST callback forwards the notification to the receiver specific to the sender or, to the generic receiver.The source calls the receiver’s HTTP POST endpoint.Figure-1 explains the flow of data when a WebHook is raised.įigure 1: Flow of Data when a WebHook is raised Before we start writing code, we need to understand how this communication is designed to work. In this article, we will see how this feature can be used to receive WebHooks exposed by Github in ASP.NET. It is also possible to subscribe to other services using the custom receiver NuGet package. ASP.NET team has implemented a set of NuGet packages to make it easier to talk to these services. Online services like GitHub, Trello, Dropbox, Slack and a few others expose WebHooks to notify actions. It uses ASP.NET Web API for sending and receiving WebHooks under the covers. ASP.NET WebHooks supports both sending and receiving WebHooks. This feature is currently implemented in ASP.NET 4.5 and it is in preview at the time of writing this article. ASP.NET WebHooksĪSP.NET WebHooks is the implementation of WebHooks in the context of ASP.NET. Web Hooks are most commonly used in systems such as continuous integration systems or messaging queues but because of their flexibility (events and callbacks can be just about anything), their potential could really be endless. Basically, a user or developer can create a notification and when a specific trigger occurs, they will be notified via an HTTP POST. The REST API is called when the triggering event occurs and then data related to the event is sent to the POST API. The source of these events may be in the same application or, in a different application. These callbacks can be configured and managed by both users of the application (including third-parties) and developers. They are configured with an event so that the callback will be invoked when the triggering event occurs. WebHooks are user-defined HTTP-based callbacks. Download this magazine from here or Subscribe to this magazine for FREE and download all previous and current editions What are WebHooks? This article is published from the DNC Magazine for. In this article, we will see what WebHooks are, examine their usefulness, and we will implement an application consuming WebHooks from GitHub.Ī special note of thanks to Rion Williams for reviewing the article and adding important bits to it. A recent addition to the ASP.NET stack is WebHooks. The platform continues to grow with each of these supported technologies receiving frequent updates to make each of them even better. It has support for building Web applications with views using Web Forms and MVC, building REST APIs using Web API, and support for real-time communication using SignalR. The ASP.NET web stack provides solutions to most of the problems we face while building server-based web applications.
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